Renesas H8S2227 16-bit single-chip microcomputer h8s family/h8s/2200 sery Datasheet

REJ09B0054-0500
The revision list can be viewed directly by
clicking the title page.
The revision list summarizes the locations of
revisions and additions. Details should always
be checked by referring to the relevant text.
16
H8S/2258, H8S/2239, H8S/2238,
H8S/2237, H8S/2227Groups
Hardware Manual
Renesas 16-Bit Single-Chip Microcomputer
H8S Family/H8S/2200 Series
H8S/2258
HD64F2258
HD6432258
HD6432258W
H8S/2256
HD6432256
HD6432256W
H8S/2239
HD64F2239
HD6432239
HD6432239W
H8S/2238B HD64F2238B
HD6432238B
HD6432238BW
H8S/2238R HD64F2238R
HD6432238R
HD6432238RW
H8S/2236B HD6432236B
HD6432236BW
Rev. 5.00
Revision Date: Aug 08, 2006
H8S/2236R HD6432236R
HD6432236RW
H8S/2237
HD6472237
HD6432237
H8S/2235
HD6432235
H8S/2233
HD6432233
H8S/2227
HD64F2227
HD6432227
H8S/2225
HD6432225
H8S/2224
HD6432224
H8S/2223
HD6432223
Keep safety first in your circuit designs!
1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and
more reliable, but there is always the possibility that trouble may occur with them. Trouble with
semiconductors may lead to personal injury, fire or property damage.
Remember to give due consideration to safety when making your circuit designs, with appropriate
measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of nonflammable material or
(iii) prevention against any malfunction or mishap.
Notes regarding these materials
1. These materials are intended as a reference to assist our customers in the selection of the Renesas
Technology Corp. product best suited to the customer's application; they do not convey any license
under any intellectual property rights, or any other rights, belonging to Renesas Technology Corp. or
a third party.
2. Renesas Technology Corp. assumes no responsibility for any damage, or infringement of any thirdparty's rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or
circuit application examples contained in these materials.
3. All information contained in these materials, including product data, diagrams, charts, programs and
algorithms represents information on products at the time of publication of these materials, and are
subject to change by Renesas Technology Corp. without notice due to product improvements or
other reasons. It is therefore recommended that customers contact Renesas Technology Corp. or
an authorized Renesas Technology Corp. product distributor for the latest product information
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The information described here may contain technical inaccuracies or typographical errors.
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from these inaccuracies or errors.
Please also pay attention to information published by Renesas Technology Corp. by various means,
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information contained herein.
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Rev. 5.00 Aug 08, 2006 page ii of lxxxvi
General Precautions on Handling of Product
1. Treatment of NC Pins
Note: Do not connect anything to the NC pins.
The NC (not connected) pins are either not connected to any of the internal circuitry or are
used as test pins or to reduce noise. If something is connected to the NC pins, the
operation of the LSI is not guaranteed.
2. Treatment of Unused Input Pins
Note: Fix all unused input pins to high or low level.
Generally, the input pins of CMOS products are high-impedance input pins. If unused pins
are in their open states, intermediate levels are induced by noise in the vicinity, a passthrough current flows internally, and a malfunction may occur.
3. Processing before Initialization
Note: When power is first supplied, the product’s state is undefined.
The states of internal circuits are undefined until full power is supplied throughout the
chip and a low level is input on the reset pin. During the period where the states are
undefined, the register settings and the output state of each pin are also undefined. Design
your system so that it does not malfunction because of processing while it is in this
undefined state. For those products which have a reset function, reset the LSI immediately
after the power supply has been turned on.
4. Prohibition of Access to Undefined or Reserved Addresses
Note: Access to undefined or reserved addresses is prohibited.
The undefined or reserved addresses may be used to expand functions, or test registers
may have been be allocated to these addresses. Do not access these registers; the system’s
operation is not guaranteed if they are accessed.
Rev. 5.00 Aug 08, 2006 page iii of lxxxvi
Configuration of This Manual
This manual comprises the following items:
1. General Precautions on Handling of Product
2. Configuration of This Manual
3. Preface
4. Main Revisions in This Edition
The list of revisions is a summary of points that have been revised or added to earlier versions.
This does not include all of the revised contents. For details, see the actual locations in this
manual.
5. Contents
6. Overview
7. Description of Functional Modules
•
CPU and System-Control Modules
•
On-Chip Peripheral Modules
The configuration of the functional description of each module differs according to the
module. However, the generic style includes the following items:
i) Feature
ii) Input/Output Pin
iii) Register Description
iv) Operation
v) Usage Note
When designing an application system that includes this LSI, take notes into account. Each section
includes notes in relation to the descriptions given, and usage notes are given, as required, as the
final part of each section.
8. List of Registers
9. Electrical Characteristics
10. Appendix
11. Index
Rev. 5.00 Aug 08, 2006 page iv of lxxxvi
Preface
The H8S/2558 Group, H8S/2239 Group, H8S/2238 Group, H8S/2237 Group, and H8S/2227
Group are high-performance microcomputers made up of the internal 32-bit configuration
H8S/2000 CPU as their cores, and the peripheral functions required to configure a system.
A single-power flash memory (F-ZTATTM*) version and masked ROM version are available for
these LSIs’ ROM. These versions provide flexibility as they can be reprogrammed in no time to
cope with all situations from the early stages of mass production to full-scale mass production.
This is particularly applicable to application devices of which the specifications frequently
changeable.
On-chip peripheral functions of each microcomputer are summarized below.
Note: * F-ZTAT is a trademark of Renesas Technology Corp.
Rev. 5.00 Aug 08, 2006 page v of lxxxvi
List of On-Chip Peripheral Functions:
H8S/2258
Group
Group Name
H8S/2239
Group
H8S/2238
Group
H8S/2237
Group
H8S/2227
Group
H8S/2237
H8S/2235
H8S/2233
H8S/2227
H8S/2225
H8S/2224
H8S/2223
Microcomputer
H8S/2258
H8S/2256
H8S/2239
H8S/2238B
H8S/2238R
H8S/2236B
H8S/2236R
Bus controller (BSC)
O (16 bits)
O (16 bits)
O (16 bits)
O (16bits)
O (16 bits)
Data transfer controller
(DTC)
O
O
O
O
O
DMA controller (DMAC)

O



PC break controller (PBC) ×2
×2
×2
×2
×2
16-bit timer pulse unit
(TPU)
×6
×6
×6
×6
×3
8-bit timer (TMR)
×4
×4
×4
×2
×2
Watchdog timer (WDT)
×2
×2
×2
×2
×2
Serial communication
interface (SCI)
×4
×4
×4
×4
×3
2
I C bus interface (IIC)
×2 (option)
×2 (option)
×2 (option)


D/A converter
×2
×2
×2
×2

Analog input ×8
×8
×8
×8
×8
×1




A/D
converter
IEBus* controller (IEB)
Note:
*
IEBus (Inter Equipment Bus) is a trademark of NEC Electronics Corp.
Target Users: This manual was written for users who will be using the H8S/2258 Group,
H8S/2239 Group, H8S/2238 Group, H8S/2237 Group, and H8S/2227 Group in the
design of application systems. Target users are expected to understand the
fundamentals of electrical circuits, logical circuits, and microcomputers.
Objective:
This manual was written to explain the H8S/2258 Group, H8S/2239 Group,
H8S/2238 Group, H8S/2237 Group, and H8S/2227 Group hardware functions and
electrical characteristics of this LSI to the target users.
Refer to the H8S/2600 Series, H8S/2000 Series Software Manual for a detailed
description of the instruction set.
Rev. 5.00 Aug 08, 2006 page vi of lxxxvi
Notes on reading this manual:
• In order to understand the overall functions of the chip
Read the manual according to the contents. This manual can be roughly categorized into
descriptions on the CPU, system control functions, peripheral functions, and electrical
characteristics.
• In order to understand the details of the CPU’s functions
Read the H8S/2600 Series, H8S/2000 Series Software Manual.
• In order to understand the details of a register whole name is already known
Read the index that is the final part of the manual to find the page number of the entry on the
register. The addresses, bits, and initial values of the registers are summarized in section 26,
List of Registers.
Rules:
Related Manuals:
Register name:
The following notation is used for cases when the same or a
similar function, e.g., 16-bit timer pulse unit or serial
communication, is implemented on more than one channel:
XXX_N (XXX is the register name and N is the channel
number)
Bit order:
The MSB is on the left and the LSB is on the right.
Number notation:
Binary is B'xxxx, hexadecimal is H'xxxx, and decimal is
xxxx.
Signal notation:
An overbar is added to a low-active signal: xxxx
The latest versions of all related manuals are available from our web site.
Please ensure you have the latest versions of all documents.
http://www.renesas.com/
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, H8S/2237 Group, H8S/2227 Group
manuals:
Document Title
Document No.
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, H8S/2237 Group,
H8S/2227 Group Hardware Manual
This manual
H8S/2600 Series, H8S/2000 Series Software Manual
REJ09B0139
Rev. 5.00 Aug 08, 2006 page vii of lxxxvi
User's Manuals for Development Tools:
Document Title
Document No.
H8S, H8/300 Series C/C++ Compiler, Assembler, Optimized Linkage
Editor Compiler Package Ver. 6.01 User's Manual
REJ10B0161
H8S, H8/300 Series High-performance Embedded Workshop 3
Tutorial
REJ10B0024
H8S, H8/300 Series High-performance Embedded Workshop 3
User's Manual
REJ10B0026
High-performance Embedded Workshop V.4.00 User's Manual
REJ10J0886
Application Notes:
Document Title
Document No.
H8S, H8/300 Series C/C++ Compiler Package Application Note
REJ05B0464
Rev. 5.00 Aug 08, 2006 page viii of lxxxvi
Main Revisions for This Edition
Item
Page
Revision (See Manual for Details)
All

Description of "under development" for HD64F2239 deleted
1.1 Features
2
•
On-chip memory
Table amended
3
ROM
Model
ROM
RAM
Masked ROM
version
HD6432258
256 kbytes
16 kbytes
•
HD6432258W
256 kbytes
16 kbytes
HD6432256
128 kbytes
8 kbytes
HD6432256W
128 kbytes
8 kbytes
Remarks
Compact package
Package
(Code)*6
TQFP-100
TFP-100B,
TFP-100BV
1
TQFP-100*
QFP-100
TFP-100G,
TFP-100GV
*2
FP-100A, FP-100AV
3
QFP-100*
FP-100B, FP-100BV
4
LFBGA-112*
5
TFBGA-112*
BP-112, BP-112V
TBP-112A,
TBP-112AV
Notes amended
Notes: 1. Not supported by the H8S/2258 Group.
2. Supported only by the H8S/2258 Group, H8S/2238B,
H8S/2236B, H8S/2237 Group, and HD6432227.
3. Not supported by the HD64F2227.
4. Supported only by the HD64F2238R.
5. Supported only by the HD64F2238R and HD64F2239.
6. Package code ending in the letter V designate Pb-free
Product.
1.3.1 Pin Arrangement
14
Figure 1.11 title amended
Figure 1.11 Pin
Arrangement of H8S/2238
Group (FP-100A, FP-100AV:
Top View, Only for
H8S/2238B and H8S/2236B)
Rev. 5.00 Aug 08, 2006 page ix of lxxxvi
Item
Page
Revision (See Manual for Details)
1.3.1 Pin Arrangement
19
Figure 1.16 title amended
Figure 1.16 Pin
Arrangement of H8S/2227
Group (FP-100A, FP-100AV:
Top View, Only for
HD6432227)
Table 1.3 Pin Arrangements 33
in Each Mode of H8S/2238
Group
Notes amended
Notes: 1. Supported only by H8S/2238B and H8S/2236B.
2. Supported only by the HD64F2238R.
3. VCC in the H8S/2238B and H8S/2236B.
1.3.2 Pin Arrangement in
Each Mode
39 to
43
Table 1.5 amended
1
1
2
2
FP-100B* FP-100BV* FP-100A* FP-100BAV*
41
Table 1.5 amended
Table 1.5 Pin Arrangements
in Each Mode of H8S/2227
Group
Pin No.
43
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
1
2
FP-100A*
FP-100B*
1
FP-100BV* FP-100AV*2 Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
57
60
OSC2
OSC2
OSC2
OSC2
NC
58
61
OSC1
OSC1
OSC1
OSC1
VSS
59
62
RES
RES
RES
RES
RES
Note 2 added
Notes: 1. Supported only by masked ROM version.
2. Supported only by the HD6432227.
1.3.3 Pin Functions
Table 1.6 Pin Functions of
H8S/2258 Group
Table 1.7 Pin Functions of
H8S/2239 Group and
H8S/2238 Group
45
Table 1.6 amended
RES* STBY* NMI*
49
Note: * Measures should be taken to deal with noise, which
can cause operation errors otherwise.
50
Table 1.7 amended
CVCC in power supply
... (H8S/2239, H8S/2378R, and H8S/2236R used), ...
51
Table 1.7 amended
5
5
5
RES* STBY* NMI*
Rev. 5.00 Aug 08, 2006 page x of lxxxvi
Item
Page
1.3.3 Pin Functions
53
Table 1.7 Pin Functions of
H8S/2239 Group and
H8S/2238 Group
Revision (See Manual for Details)
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
3
*
FP-100BV FP-100AV TBP-112AV*4 I/O
DMA
controller
(DMAC)*2
DREQ1
DREQ0
89
90
B6
D6
Input
Request DMAC activation.
(Supported only by the H8S/2239 Group.)
TEND1
TEND0
87
88
C6
A6
Output
Indicate that the DMAC has ended
transmitting data.
(Supported only by the H8S/2239 Group.)
DACK1
DACK0
35
34
J5
H5
Output
These pins function as single address
transmitting acknowledge of DMAC.
(Supported only by the H8S/2239 Group.)
Function
55
P47 to P40 in I/O ports
56
Notes: 1. Supported only by the HD64F2238R.
L10, L9, K11, K10, K9, K8, H7, J8
2. Supported only by the H8S/2239 Group.
3. Supported only by the H8S/2238B and H8S/2236B.
4. Supported only by the HD64F2238R and HD64F2239.
5. Measures should be taken to deal with noise, which can
cause operation errors otherwise.
Table 1.8 Pin Functions of
H8S/2237 Group and
H8S/2227 Group
57 to
61
Table 1.8 amended
1
1
2
2
FP-100B* FP-100BV* FP-100A* FP-100BAV*
3
3
3
RES* STBY* NMI*
61
Notes amended
Notes: 1. Supported only by masked ROM version.
2. Supported only by the HD6432227.
3. Measures should be taken to deal with noise, which can
cause operation errors otherwise.
3.4 Memory Map in Each
Operating Mode
115
Figure 3.7 amended
(Before) On-chip RAM → (After) On-chip ROM
Figure 3.7 H8S/2235 and
H8S/2225 Memory Map in
Each Operating Mode
5.1 Features
128
(Before) IRQ → (After) IRQ
Figure 5.1 Block Diagram of
Interrupt Controller
5.3.2 IRQ Enable Register
(IER)
Figure 5.1 amended
131
Description amended
(Before) IRQn → (After) IRQn
Rev. 5.00 Aug 08, 2006 page xi of lxxxvi
Item
Page
Revision (See Manual for Details)
5.3.4 IRQ Status Register
(ISR)
134
Description amended
ISR indicates the status of IRQn (n=7 to 0) interrupt
requests.
6.3.4 Operation in Transition 161,
to Power-Down Modes
162
8.3 Register Descriptions
205
Description amended
•
When the SLEEP instruction causes a transition from
high-speed (medium-speed) mode to sleep mode, or
from subactive mode to subsleep mode: After execution
of the SLEEP instruction, a transition is not made to
sleep mode or subsleep mode, and PC break interrupt
handling is executed. ...
•
When the SLEEP instruction causes a transition to
software standby mode or watch mode:
Description amended
• Transfer count register_0A (ETCR_0A)
• Transfer count register_0B (ETCR_0B)
8.7.1 DMAC Register
Access during Operation
276
Figure 8.38 amended
DMA last transfer cycle
Figure 8.38 DMAC
Register Update Timing
DMA read
ead
Write
[2']
282
Dead
Idle
[3]
Figure 9.1 amended
(Before) DTCERA to DTCERF, DTCERI → (After) DTCERA
to DTCERG, DTCERI
Figure 9.1 Block Diagram of
DTC
9.2 Register Descriptions
DMA
dead
Transfer
destination
nsfer
urce
9.1 Features
DMA write
283
Description amended
... When activated, ... back to the RAM.
•
Rev. 5.00 Aug 08, 2006 page xii of lxxxvi
DTC Enable Registers A to G, and I (DCTERA to
DTCERG, and DTCERI) ...
Item
Page
9.2.7 DTC Enable Registers 286,
A to G, and I
287
Revision (See Manual for Details)
Section 9.2.7 description replaced and bit table amended
9.2.7
DTC Enable Registers A to G, and I (DTCERA to DTCERG, and DTCERI)
DTCER is a set of registers to specify the DTC activation interrupt source, and comprised of eight
registers; DTCERA to DTCERG, and DTCERI. The correspondence between interrupt sources
and DTCE bits, and vector numbers generated by the interrupt controller are shown in table 9.2.
For DTCE bit setting, use bit manipulation instructions such as BSET and BCLR for reading and
writing. When multiple activation sources are to be set at one time, only at the initial setting,
writing data is enabled after executing a dummy read on the relevant register with all the interrupt
being masked.
Bit
Bit Name
Initial
Value
R/W
Description
7
DTCEn7
0
R/W
DTC Activation Enable
6
DTCEn6
0
R/W
0: Disables an interrupt for DTC activation.
5
DTCEn5
0
R/W
4
DTCEn4
0
R/W
1: Specifies a relevant interrupt source as a DTC
activation source.
3
DTCEn3
0
R/W
[Clearing conditions]
2
DTCEn2
0
R/W
1
DTCEn1
0
R/W
0
DTCEn0
0
R/W
• When the DISEL bit is 1 and the data transfer
has ended
• When the specified number of transfers have
ended
[Retaining condition]
When the DISEL bit is 0 and the specified number
of transfers have not been completed
Note: n = A to G, and I
9.2.8 DTC Vector Register
(DTVECR)
288
Bit table amended
Bit
Bit Name
Initial
Value
R/W
Description
7
SWDTE
0
R/W
DTC Software Activation Enable
Enables or disables the DTC software activation.
0: Disables the DTC software activation.
1: Enables the DTC software activation.
[Clearing conditions]
•
When the DISEL bit is 0 and the specified
number of transfers have not ended
•
When 0 is written to the DISEL bit after a
software-activated data transfer end interrupt
(SWDTEND) request has been sent to the CPU.
[Retaining conditions]
9.4 Location of Register
293
Information and DTC Vector
Table
•
When the DISEL bit is 1 and data transfer has
ended
•
When the specified number of transfers have
ended
•
When the software-activated data transfer is in
process
DTCE description of IERxI (RxRDY) and IETxI (TxRDY)
amended
DTCEG6 DTCEG5
Table 9.2 Interrupt Sources,
DTC Vector Addresses, and
Corresponding DTCEs
Rev. 5.00 Aug 08, 2006 page xiii of lxxxvi
Item
Page
Revision (See Manual for Details)
9.8.2 On-Chip RAM
304
Description amended
The MRA, ... in the on-chip RAM. When the DTC is used,
the RAME bit in SYSCR should not be cleared to 0.
Section 10 I/O Ports
306
1
... NMOS push-pull output* (P35, P34, SCK1)
Table 10.1 Port Functions
10.2 Port 3
Port 3 input/output and output type description amended
315
Description amended
Port 3 is ... following registers. The P34, P35, and SCK1
function as NMOS push/pull outputs.*
10.2.5 Pin Functions
317
Description amended
As shown in figure 10.1, when the pins P35, P34, SCK1,
SCK0, or SDA0 type open drain output is used, ...
Figure 10.1 Types of Open
Drain Outputs
318
Figure 10.1 amended
(a) Open drain output type for P34, P35, SCK1, SCL0, and
SDA0 pins
318
Description amended
(Before) ... output the P2 VCC level. → (After) ... output the
VCC level.
319
Table amended
•
P35/SCK1/SCL0/IRQ5
3
SCK1 input pin SCL0 I/O pin*
•
P34/RxD1/SDA0
2
SDA0 I/O pin*
320
•
P33/TxD1/SCL1
2
SCL1 I/O pin*
•
P32/SCK0/SDA0
3
SDA1 I/O pin*
10.4.4 Pin Functions
324
•
P75/TMO3/SCK3
Description amended
... OS3 to OS0 bits in TCSR_3 of TMR_3*, CKE1 and ...
Table amended
OS3 to OS0* TMO3* output pin
Note added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
Rev. 5.00 Aug 08, 2006 page xiv of lxxxvi
Item
Page
Revision (See Manual for Details)
10.4.4 Pin Functions
325
•
P74/TMO2/MRES
Description amended
... OS3 to OS0 bits in TCSR_2 of TMR_2*, the MRESE ...
Table amended
OS3 to OS0* TMO2* output
Note added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
325
•
P73/TMO1/TEND1/CS7
Description amended
... DMATCR of DMAC*, OS3 to OS0 ...
Table amended
TEND1* output pin
325
•
P72/TMO0/TEND0/CS6
Description amended
... DMATCR of DMAC*, OS3 to OS0 ...
Table amended
TEND0* output pin
326
•
P71/TMRI23/TMCI23/DREQ1/CS5
Table amended
Operating
mode
Modes 4 to 6
P71DDR
Pin functions
Mode 7
0
1
P71 input pin
1
TMRI23* ,
1
TMCI23* ,
2
DREQ1* input pin
CS5 output pin

0
1
P71 input pin
P71 output pin
1
1
2
TMRI23* , TMCI23* , DREQ1* input
pin
Note 1 added
Note: 1. Not available in the H8S/2237 Group and
H8S/2227 Group.
326
•
P70/TMRI01/TMCI01/DREQ0/CS4
Table amended
TMRI01, TMCI01, DREQ0* input pin
Rev. 5.00 Aug 08, 2006 page xv of lxxxvi
Item
Page
Revision (See Manual for Details)
10.6.6 Pin Functions
330
•
PA3/A19/SCK2
Description amended
2
... SMR_2 of SCI_2* , CKE1 and CKE0 bits...
Table amended
Operating mode
AE3 to AE0
Modes 4 to 6
B'11xx
Other than B'11xx
CKE1
C/A*2
—
CKE0
—
PA3DDR
—
0
1
A19
output
pin
PA3 input
pin
PA3 output
pin*1
SCK2*2
output
pin*1
Pin functions
0
1
0
—
1
—
1
—
—
—
—
—
SCK2*2
output
pin*1
SCK2*2
input pin
0
Operating
mode
Mode 7
AE3 to AE0
CKE1
C/A*2
0
CKE0
0
1
—
—
1
—
0
1
—
—
—
PA3 input pin
PA3 output
pin*1
SCK2*2
output pin*1
SCK2*2
output pin*1
SCK2*2 input
pin
PA3DDR
Pin functions
1
0
Note 2 added
Note: 2. Not available in the H8S/2227 Group.
331
•
PA2/A18/RxD2
Description amended
2
... SCR_2 of SCI_2* , and the PA2DDR bit.
Table amended
Operating
mode
AE3 to AE0
Modes 4 to 6
B'1011
or
B'11xx
Mode 7

Other than (B'1011 or B'11xx)
RE*2

PA2DDR

0
1

0
1

A18
output
pin
PA2
input pin
PA2
output
pin*1
RxD2*2
input pin
PA2
input pin
PA2
output
pin*1
RxD2*2
input pin
Pin functions
0
1
0
Note 2 added
Note: 2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xvi of lxxxvi
1
Item
Page
Revision (See Manual for Details)
10.6.6 Pin Functions
331
•
PA1/A17/TxD2
Description amended
2
... SCR_2 of SCI_2* , and the PA1DDR bit.
Table amended
Operating
mode
AE3 to AE0
Modes 4 to 6
B'101x or
B'11xx
Mode 7

Other than (B'101x or B'11xx)
TE*2

PA1DDR

0
1

0
1

A17
output pin
PA1
input pin
PA1
output
pin*1
TxD2 *2
output
pin*1
PA1
input pin
PA1
output
pin*1
TxD2 *2
output
pin*1
Pin functions
0
1
0
1
Note 2 added
Note: 2. Not available in the H8S/2227 Group.
10.7.5 Pin Functions
335
•
PB7/A15/TIOCB5
Description amended
3
... the TPU channel 5* setting, AE3 to AE0 bits...
Table amended
Operating
mode
AE3 to AE0
TPU channel 5
1 3
setting* *
PB7DDR
Pin functions
Modes 4 to 6
B'1xxx

Mode 7

Other than B'1xxx
Output
Input or initial value


A15
output
pin
TIOCB5*
output pin
3
Output
Input or initial
value
0
1

PB7
input pin
PB7
output
pin
TIOCB5*
output pin
3
3
TIOCB5* input
2
pin*
0
1
PB7
input
pin
PB7
output
pin
3
TIOCB5* input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xvii of lxxxvi
Item
Page
Revision (See Manual for Details)
10.7.5 Pin Functions
335
•
PB6/A14/TIOCA5
Description amended
3
... the TPU channel 5* setting, AE3 to AE0 bits...
Table amended
Operating
mode
AE3 to AE0
Modes 4 to 6
B'0111 or
B'1xxx

TPU channel 5
1 3
setting* *
Pin functions
Output
Input or initial value


A14
output pin
TIOCA5*
output pin
PB6DDR
Mode 7

Other than (B'0111 or B'1xxx)
3
Output
Input or initial
value
0
1

PB6
input
pin
PB6
output
pin
TIOCA5*
output pin
3
3
0
1
PB6
input
pin
PB6
output
pin
3
TIOCA5* input
2
pin*
TIOCA5* input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
336
•
PB5/A13/TIOCB4
Description amended
3
... the TPU channel 4* setting, AE3 to AE0 bits...
Table amended
Operating
mode
AE3 to AE0
Modes 4 to 6
B'011x or
B'1xxx

TPU channel 4
1 3
setting* *
Pin functions
Output
Input or initial value


A13
output pin
TIOCB4*
output pin
PB5DDR
Mode 7

Other than (B'011x or B'1xxx)
3
Output
Input or initial
value
0
1

PB5
input
pin
PB5
output
pin
TIOCB4*
output pin
3
3
TIOCB4* input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xviii of lxxxvi
0
1
PB5
input
pin
PB5
output
pin
3
TIOCB4* input
2
pin*
Item
Page
Revision (See Manual for Details)
10.7.5 Pin Functions
336
•
PB4/A12/TIOCA4
Description amended
3
... the TPU channel 4* setting, AE3 to AE0 bits...
Table amended
Operating
mode
AE3 to AE0
Modes 4 to 6

TPU channel 4
1 3
setting* *
Pin functions
Output

Input or initial value


A12
output pin
TIOCA4*
output pin
PB4DDR
Mode 7
B'0100 or B'00xx
Other than
(B'0100 or
B'00xx)
3
Output
Input or initial
value
0
1

PB4
input
pin
PB4
output
pin
TIOCA4*
output pin
3
3
0
1
PB4
input
pin
PB4
output
pin
3
TIOCA4* input
2
pin*
TIOCA4* input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
337
•
PB3/A11/TIOCD3
Description amended
3
... the TPU channel 3* setting, AE3 to AE0 bits...
Table amended
Operating
mode
AE3 to AE0
Modes 4 to 6
Other than
B'00xx

TPU channel 3
1 3
setting* *
Pin functions
Output

Input or initial value


A11 output
pin
TIOCD3 *
output pin
PB3DDR
Mode 7
B'00xx
3
Output
Input or initial
value
0
1

PB3
input pin
PB3
output
pin
TIOCD3 *
output pin
3
TIOCD3 * input
2
pin*
3
0
1
PB3
input
pin
PB3
output
pin
3
TIOCD3 * input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
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Item
Page
Revision (See Manual for Details)
10.7.5 Pin Functions
337
•
PB2/A10/TIOCC3
Description amended
3
... the TPU channel 3* setting, AE3 to AE0 bits...
Table amended
Operating mode
AE3 to AE0
Modes 4 to 6
Other than
(B'0010 or
B'000x)

TPU channel 3
1 3
setting* *
Pin functions
Output

Input or initial
value


A10 output
pin
TIOCC3 *
output pin
PB2DDR
Mode 7
B'0010 or B'000x
3
Output
Input or initial
value
0
1

PB2
input
pin
PB2
output
pin
TIOCC3 *
output pin
3
3
0
1
PB2
input
pin
PB2
output
pin
3
TIOCC3 * input
2
pin*
TIOCC3 * input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
338
•
PB1/A9/TIOCB3
Description amended
3
... the TPU channel 3* setting, AE3 to AE0 bits...
Table amended
Operating mode
AE3 to AE0
Modes 4 to 6
Other than
B'000x

TPU channel 3
1 3
setting* *
Pin functions
Output


A9 output
pin
TIOCB* 3
output pin
PB1DDR
Mode 7

B'000x
3
Input or initial
value
Output
Input or initial
value
0
1

PB1
input
pin
PB1
output
pin
TIOCB3*
output pin
3
3
TIOCB3* input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xx of lxxxvi
0
1
PB1
input
pin
PB1
output
pin
3
TIOCB3* input
2
pin*
Item
Page
Revision (See Manual for Details)
10.7.5 Pin Functions
338
•
PB0/A8/TIOCA3
Description amended
3
... the TPU channel 3* setting, AE3 to AE0 bits...
Table amended
Operating mode
AE3 to AE0
Modes 4 to 6
Other than
B'0000
TPU channel 3
1 3
setting* *

Output
PB0DDR


A8 output
pin
TIOCA3*
output pin
Pin functions
Mode 7

B'0000
Input or initial
value
3
Output
Input or initial
value
0
1

PB0
input
pin
PB0
output
pin
TIOCA3*
output pin
3
3
TIOCA3* input
2
pin*
0
1
PB0
input
pin
PB0
output
pin
3
TIOCA3* input
2
pin*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
10.9.6 Input Pull-Up MOS
States in Port D
345
Port I/O (modes 4 to 6)
Table 10.5 Input Pull-Up
MOS States in Port D
10.12.4 Pin Functions
Table 10.5 amended
Port input (mode 7)
356
•
PG3/Rx/CS1
Description amended
3
... IECTR of IEB* , operating mode...
•
PG2/Tx/CS2
Description amended
3
... IECTR of IEB* , operating mode...
11. 16-Bit Timer Pulse Unit 359
(TPU)
Description amended
11.3.1 Timer Control
Register (TCR)
Description amended
367
... that comprises three 16-bit timer channels or six 16-bit
timer channels. ...
... for each channel. The TPU of the H8S/2227 Group has a
total of three TCR registers, one each for channels 0 to 2. In
other groups, the TPU has a total of six TCR registers, one
each for channels 0 to 5. TCR register settings ...
CKEG1 and CKEG0 description amended
... channels 1, 2, 4*, and 5*, this setting is ignored ...
Note * added
Note: * Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xxi of lxxxvi
Item
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Revision (See Manual for Details)
11.3.1 Timer Control
Register (TCR)
368
Table 11.3 amended
3
Channel 0, 3*
Table 11.3 CCLR2 to
CCLR0 (Channels 0 and 3)
Table 11.4 CCLR2 to
CCLR0 (Channels 1, 2, 4,
and 5)
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
368
Table 11.4 amended
3
3
Channel 1, 2, 4* , 5*
Note 3 added
Note: 3. Not available in the H8S/2227 Group.
11.3.2 Timer Mode Register 372
(TMDR)
Description amended
... for each channel. The TPU of the H8S/2227 Group has a
total of three TMDR registers, one each for channels 0 to 2.
In other groups, the TPU has a total of six TMDR registers,
one each for channels 0 to 5. TMDR register settings ...
BFB and BFA description amended
... In channels 1, 2, 4*, and 5*, which have no ...
Note * added
Note: * Not available in the H8S/2227 Group.
11.3.3 Timer I/C Control
Register (TIOR)
373
Description amended
... the TGR registers. The TPU of the H8S/2227 Group has a
total of four TIOR registers, two for channel 0 and one each
for channels 1 and 2. In other groups, the TPU has a total of
eight TIOR registers, two each for channels 0 and 3, and
one each for channels 1, 2, 4, and 5. Care is required since
...
374
TIORH_0, TIOR_1, TIOR_2, TIORH_3*, TIOR_4*, TIOR_5*
Note * added
Note: * Not available in the H8S/2227 Group.
TIORL_0, TIORL_3*
Note * added
Note: * Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xxii of lxxxvi
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11.3.4 Timer Interrupt
Enable Register (TIER)
391
Description amended
... for each channel. The TPU of the H8S/2227 Group has a
total of three TIER registers, one each for channels 0 to 2. In
other groups, the TPU has a total of six TIER registers, one
each for channels 0 to 5. Care is required since ...
391,
392
TCIEU, TGIED, TGIEC description amended
392
Note * added
... in channels 1, 2, 4*, and 5* ... channels 0 and 3*, ...
Note: * Not available in the H8S/2227 Group.
11.3.5 Timer Status
Register (TSR)
393
Description amended
... of each channel. The TPU of the H8S/2227 Group has a
total of three TSR registers, one each for channels 0 to 2. In
other groups, the TPU has a total of six TSR registers, one
each for channels 0 to 5.
393,
394
Table amended
395
Note 3 added
3
3
... channels 1, 2, 4* , and 5*
3
... channels 0 and 3*
Note: 3. Not available in the H8S/2227 Group.
11.3.6 Timer Counter
(TCNT)
396
11.3.7 Timer General
Register (TGR)
396
Description amended
... readable/writable counters. The TPU of the H8S/2227
Group has a total of three TCNT registers, one each for
channels 0 to 2. In other groups, the TPU has a total of six
TCNT registers, one each for channels 0 to 5.
11.3.8 Timer Start Register 396
(TSTR)
Description amended
... input capture registers. The TPU of the H8S/2227 Group
has a total of four TGR registers, two for channel 0 and one
each for channels 1 and 2. In other groups, the TPU has a
total of eight TGR registers, two each for channels 0 and 3,
and one each for channels 1, 2, 4, and 5.
Description amended
In the H8S/2227 Group, TSTR selects operate/stop for
channels 0 to 2. In other groups, TSTR selects operate/stop
for channels 0 to 5. When setting ...
Table amended
CDT5* CDT4* CDT3*
Note * added
Note: * In the H8S/2227 Group, bits 5 to 3 are reserved.
The write value should always be 0.
Rev. 5.00 Aug 08, 2006 page xxiii of lxxxvi
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Revision (See Manual for Details)
11.3.9 Timer Synchronous
Register (TSYR)
397
Description amended
In the H8S/2227 Group, TSYR selects independent or
synchronous TCNT operation for channels 0 to 2. In other
groups, TSYR selects independent or synchronous TCNT
operation for channels 0 to 5. A channel performs ...
Table amended
SYNC5* SYNC4* SYNC3*
Note * added
Note: * In the H8S/2227 Group, bits 5 to 3 are reserved.
The write value should always be 0.
11.4.1 Basic Functions
398
Description amended
Counter Operation: When one of bits CST2 to CST0
(H8S/2227 Group) or bits CST5 to CST0 (groups other than
H8S/2227) in TSTR is set to 1, the TCNT counter for the
corresponding channel starts counting. TCNT can operate ...
402
Description amended
... For channels 0, 1, 3*, and 4*, it is also possible ...
Note * added
Note: * Not available in the H8S/2227 Group.
11.4.2 Synchronous
Operation
403
11.4.3 Buffer Operation
405
... single time base. Channels 0 to 2 (H8S/2227 Group) or 0
to 5 (groups other than H8S/2227) can all be designated for
synchronous operation.
Table 11.28 Register
Combinations in Buffer
Operation
11.4.6 Phase Counting
Mode
Description amended
Table 11.28 amended
Channel 3*
Note * added
Note: * Not available in the H8S/2227 Group.
416
Table 11.31 Clock Input
416
Pins in Phase Counting Mode
Description amended
... incremented/decremented accordingly. In the H8S/2227
Group, this mode can be set for channels 1 and 2. In other
groups, it can be set for channels 1, 2, 4, and 5.
Table 11.31 amended
channel 1 or 5* channel 2 or 4*
Note * added
Note: * Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xxiv of lxxxvi
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11.4.6 Phase Counting
Mode
417
Figure 11.26 amended
(channels 1 and 5*) (channels 2 and 4*)
Figure 11.26 Example of
Phase Counting Mode 1
Operation
Note * added
Note: * Not available in the H8S/2227 Group.
Table 11.32 Up/Down-Count 418
Conditions in Phase Counting
Mode 1
Table 11.32 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Figure 11.27 Example of
Phase Counting Mode 2
Operation
419
Figure 11.27 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Table 11.33 Up/Down-Count 419
Conditions in Phase Counting
Mode 2
Table 11.33 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Figure 11.28 Example of
Phase Counting Mode 3
Operation
419
Figure 11.28 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Table 11.34 Up/Down-Count 420
Conditions in Phase Counting
Mode 3
Table 11.34 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Figure 11.29 Example of
Phase Counting Mode 4
Operation
421
Figure 11.29 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Table 11.35 Up/Down-Count 421
Conditions in Phase Counting
Mode 4
Table 11.35 amended
(channels 1 and 5*) (channels 2 and 4*)
Note * added
Note: * Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xxv of lxxxvi
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Page
Revision (See Manual for Details)
11.5 Interrupt Sources
425
Description amended
Input Capture/Compare Match Interrupt:
... In the H8S/2227 Group, the TPU has eight input
capture/compare match interrupts, four for channel 10 and
two each for channels 1 and 2. In other groups, the TPU has
16 input capture/compare match interrupts, four each for
channels 0 and 3, and two each for channels 1, 2, 4, and 5.
Overflow Interrupt:
... In the H8S/2227 Group, the TPU has three overflow
interrupts, one each for channels 0 to 2. In other groups, the
TPU has six overflow interrupts, one each for channels 0 to
5.
Underflow Interrupt:
... The TPU of the H8S/2227 Group has two underflow
interrupts, one each for channels 1 and 2. In other groups,
the TPU has four underflow interrupts, one each for
channels 1, 2, 4, and 5.
11.6 DTC Activation
425
Description amended
... Data Transfer Controller (DTC). In the H8S/2227 Group, a
total of eight TPU input capture/compare match interrupts
can be used as DTC activation sources, four for channel 0
and two each for channels 1 and 2. In other groups, a total
of 16 TPU input capture/compare match interrupts can be
used as DTC activation sources, four each for channels 0
and 3, and two each for channels 1, 2, 4, and 5.
11.10.12 Contention
between TCNT Write and
Overflow/Underflow
440
Figure 11.54 replaced
440
Description amended
Figure 11.54 Contention
between TCNT Write and
Overflow
11.10.14 Interrupts and
Module Stop Mode
... source or the DMAC* or DTC activation ...
Note * added
Note: * Supported only by the H8S/2239 Group.
Rev. 5.00 Aug 08, 2006 page xxvi of lxxxvi
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12.1 Features
441
Description amended
•
Cascading of the two channels
... MR_2* and TMR_3* cascading ...
442
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
Figure 12.1 Block Diagram 442
of 8-Bit Timer Module
Note * amended
12.2 Input/Output Pins
Note * amended
443
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
Table 12.1 Pin Configuration
12.3 Register Descriptions
Note: * When a sub-clock is operating in power-down
mode, φ will be φSUB.
444
Note * amended
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
12.3.1 Timer Counter
(TCNT)
444
Description amended
... (TCNT_2 and TCNT_3) * comprise ...
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
12.3.2 Time Constant
Register A (TCORA)
444
Description amended
... (TCORA_2 and TCORA_3) * comprise ...
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
12.3.3 Time Constant
Register B (TCORB)
445
Description amended
... (TCORB_2 and TCORB_3)* comprise ...
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
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12.3.4 Timer Control
Register (TCR)
446
Table amended
Bit
Bit Name
Initial
Value
R/W
Description
2
CKS2
0
R/W
Clock Select 2 to 0
1
CKS1
0
R/W
0
CKS0
0
R/W
The input clock can be selected from three clocks
divided from the system clock ( ). When use of an
external clock is selected, three types of count can be
selected: at the rising edge, the falling edge, and both
rising and falling edges.
000: Clock input disabled
001: φ /8 internal clock source, counted on the falling
edge
010: φ /64 internal clock source, counted on the falling
edge
011: φ /8192 internal clock source, counted on the
falling edge
100: For channel 0:
1
Counted on TCNT1 overflow signal*
For channel 1:
1
Counted on TCNT0 compare-match A*
2
For channel 2:*
1
Counted on TCNT3 overflow signal*
2
For channel 3:*
1
Counted on TCNT2 compare-match A *
101: External clock source, counted at rising edge
110: External clock source, counted at falling edge
111: External clock source, counted at both rising and
falling edges
Note 2 added
Note: 2. Not available in the H8S/2237 Group and
H8S/2227 Group.
12.3.5 Timer Control/Status 449
Register (TCSR)
•
1
TCSR_1 and TCSR_3*
Table amended
2
R/(W)*
450
Note 1 added
Note: 1. Not available in the H8S/2237 Group and
H8S/2227 Group.
451
•
1
TCSR_2*
Table amended
2
R/(W)*
452
Note 1 added
Note: 1. Not available in the H8S/2237 Group and
H8S/2227 Group.
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12.6 Operation with
Cascaded Connection
457
Description amended
... (TCR_2 and TCR_3)* ... (channel 2)* ... (channel 3)*
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
12.7.1 Interrupt Sources and 458
DTC Activation
Table 12.2 8-Bit Timer
Interrupt Sources
Table 12.2 amended
Interrupt source Description
CMIA2*
TCORA_2 compare-match
CMIB2*
TCORB_2 compare-match
OVI2*
TCNT_2 overflow
CMIA3*
TCORA_3 compare-match
CMIB3*
TCORB_3 compare-match
OVI3*
TCNT_3 overflow
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
12.8.7 Mode Setting of
Cascaded Connection
464
Description amended
... (TCNT_2 and TCNT_3)* ...
Note * added
Note: * Not available in the H8S/2237 Group and H8S/2227
Group.
13.1 Features
466
Figure 13.1 amended
2
Figure 13.1 Block Diagram
of WDT_0 (1)
Internal clock sources*
Note 2 amended
Note: 2. When a sub-clock is operating in power-down
mode, φ will be φSUB.
Figure 13.1 Block Diagram 467
of WDT_1 (2)
Note *2 deleted
13.4.2 Interval Timer Mode 474
Description added
... TCNT overflows. (The NMI interrupt is not generated.)
Therefore, an interrupt can be generated at intervals.
13.4.4 Timing of Setting
Watchdog Timer Overflow
Flag (WOVF)
476
Description added
... If TCNT overflows ... entire chip. (The WOVI interrupt is
not generated.) This timing is illustrated in figure 13.5.
Rev. 5.00 Aug 08, 2006 page xxix of lxxxvi
Item
Page
Revision (See Manual for Details)
14.1.3 Transfer Data (Data 495
Field Contents)
Subheading amended
14.3.3 IEBus Master Control 503
Register (IEMCR)
R/W description of CTL 3 to 0 amended
14.4.2 Slave Receive
Operation
Figure 14.10 amended
533
R/W
Set the RxE flag and the master unit address in IEMA1 and
IEMA2.
Figure 14.10 Error
Occurrence in the Broadcast
Reception (DEE=1)
15.3.2 Receive Data
Register (RDR)
(4) Locking/Unlocking (Control Bits: Setting (H'3, H'A, H'B),
Cancellation: (H'6))
552
15.3.5 Serial Mode Register 555
(SMR)
Description amended
... watch mode, subactive mode, subsleep mode, or ...
•
Smart Card Interface Mode (When SMIF in SCMR is 1)
Bit 7 GM and bit 6 BLK description added
Bit
Bit Name
Initial
Value
R/W
Description
7
GM
0
R/W
GSM Mode
When this bit is set to 1, the SCI operates in GSM
mode. In GSM mode, the timing of the TEND
setting is advanced by 11.0 etu (Elementary Time
Unit: the time for transfer of 1 bit), and clock output
control mode addition is performed. For details,
refer to section 15.7.8, Clock Output Control.
0: Normal smart card interface mode operation
(initial value)
•
The TEND flag is generated 12.5 etu (11.5 etu
in the block transfer mode) after the beginning
of the start bit.
•
Clock output on/off control only
1: GSM mode operation in smart card interface
mode
Rev. 5.00 Aug 08, 2006 page xxx of lxxxvi
•
The TEND flag is generated 11.0 etu after the
beginning of the start bit.
•
In addition to clock output on/off control,
high/low fixed control is supported (set using
SCR).
Item
Page
15.3.5 Serial Mode Register 556
(SMR)
Revision (See Manual for Details)
Bit
Bit Name
Initial
Value
R/W
Description
6
BLK
0
R/W
When this bit is set to 1, the SCI operates in block
transfer mode. For details on block transfer mode,
refer to section 15.7.3, Block Transfer Mode.
0: Normal smart card interface mode operation
(initial value)
•
Error signal transmission, detection, and
automatic data retransmission are performed.
•
The TXI interrupt is generated by the TEND
flag.
•
The TEND flag is set 12.5 etu (11.0 etu in the
GSM mode) after transmission starts.
1: Operation in block transfer mode
15.3.7 Serial Status
Register (SSR)
565
•
•
Error signal transmission, detection, and
automatic data retransmission are not
performed.
•
The TXI interrupt is generated by the TDRE
flag.
•
The TEND flag is set 11.5 etu (11.0 etu in the
GSM mode) after transmission starts.
Normal Serial Communication Interface Mode (When
SMIF in SCMR is 0)
Bit 2 TEND description amended
2
3
[Clearing conditions] ... • When the DMAC* or the DTC* is
...
569
•
Smart Card Interface Mode (When SMIF in SCMR is 1)
Bit 2 TEND description amended
[Setting conditions]
•
When the TE bit in SCR is 0 ...
•
When the ERS bit is 0 and the TDRE bit is 1 after the
specified interval following transmission of 1-byte data. ...
2
3
[Clearing conditions] ... • When the DMAC* or the DTC* is
...
572 to Note *3 added to items of "operating frequency φ (MHz)"
3
3
3
3
3
3
3
574
2* 2.097152* 2.4576* 3* 3.6864* 4* 4.9152*
3
3
3
3
3
3
5* 6* 6.144* 7.3728* 8* 9.8304*
Table 15.3 BRR Setting for
Various Bit Rates
575
Note 3 added
(Asynchronous Mode)
Note: 3. The H8S/2258 Group is out of operation.
15.3.9 Bit Rate Register
(BRR)
Rev. 5.00 Aug 08, 2006 page xxxi of lxxxvi
Item
Page
Revision (See Manual for Details)
15.3.9 Bit Rate Register
(BRR)
576
Note *2 added to table 15.4
Maximum Bit
Rate (kbps)
(MHz)
Table 15.4 Maximum Bit
Rate for Each Frequency
(Asynchronous Mode)
2
*2
62.5
2.097152 65.536
*2
2
2.4576*
2
3*
2
3.6864*
2
4*
2
4.9152*
2
5*
2
6*
2
6.144*
2
7.3728*
2
8*
n
N
(MHz)
*2
Maximum Bit
Rate (kbps)
n
N
307.2
0
0
0
0
9.8304
0
0
10
312.5
0
0
76.8
0
0
12
375.0
0
0
93.75
0
0
384.0
0
0
115.2
0
0
12.288
1
14*
437.5
0
0
125.0
0
0
460.8
0
0
153.6
0
0
14.7456*
1
16*
500.0
0
0
156.25
0
0
17.2032*
537.6
0
0
187.5
0
0
18*
562.5
0
0
192.0
0
0
614.4
0
0
230.4
0
0
19.6608*
1
20*
625.0
0
0
250.0
0
0
1
1
1
1
Note 2 added
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Table 15.5 Maximum Bit
Rate with External Clock
Input (Asynchronous Mode)
577
Note *2 added to table 15.5
External Input
Clock (MHz)
(MHz)
2
2*
0.5000
2.097152 0.5243
*2
2
2.4576*
2
3*
2
3.6864*
2
4*
2
4.9152*
2
5*
2
6*
2
6.144*
2
7.3728*
2
8*
Maximum Bit
Rate (kbps)
External Input
Clock (MHz)
(MHz)
2
Maximum Bit
Rate (kbps)
31.25
9.8304*
2.4576
153.6
32.768
10
2.5000
156.25
0.6144
38.4
12
3.0000
187.5
0.7500
46.875
3.0720
192.0
0.9216
57.6
12.288
1
14*
3.5000
218.75
1.0000
62.5
3.6864
230.4
1.2288
76.8
14.7456*
1
16*
4.0000
250.0
1.2500
78.125
17.2032*
4.3008
268.8
1.5000
93.75
18*
4.5000
281.3
1.5360
96.0
4.9152
307.2
1.8432
115.2
19.6608*
1
20*
5.0000
312.5
2.0000
125.0
1
1
1
1
Note 2 added
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Rev. 5.00 Aug 08, 2006 page xxxii of lxxxvi
Item
Page
Revision (See Manual for Details)
15.3.9 Bit Rate Register
(BRR)
578,
579
Table 15.6 amended
Operating Frequency
2
Table 15.6 BRR Setting for
Various Bit Rates (Clocked
Synchronous Mode)
2
2*
n
N
n
N
110
3
70
—
—
250
2
124
2
500
1
249
2
1k
1
124
2.5 k
0
5k
(MHz)
2
4*
Bit Rate
(bps)
2
6*
N
8*
n
N
249
3
124
124
2
249
1
249
2
124
199
1
99
1
149
1
199
0
99
0
199
1
74
1
99
10 k
0
49
0
99
0
149
0
199
25 k
0
19
0
39
0
59
0
79
50 k
0
9
0
19
0
29
0
39
100 k
0
4
0
9
0
14
0
19
250 k
0
1
0
3
0
5
0
7
500 k
0
0*
0
1
0
2
0
3
0
0*
0
1
1M
n
2.5 M
5M
Note 2 added
Note: 2. The H8S/2258 Group is out of operation.
Table 15.7 Maximum Bit
579
Rate with External Clock
Input (Clocked Synchronous
Mode)
Note *2 added to table 15.7
2
2
2
2
1
1
1
1
2* 4* 6* 8* 14* 16* 18* 20*
Note 2 added
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Table 15.8 Examples of Bit 580
Rate for Various BRR
Settings (Smart Card
Interface Mode) (When n = 0
and S = 372)
Note *2 added to table 15.9
2
2
2
1
1
1
5.00* 7.00* 7.1424* 14.2848* 16.00* 18.00*
1
*
20.00
Note 2 added
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Table 15.9 Maximum Bit
580
Rate at Various Frequencies
(Smart Card Interface Mode)
When S = 372)
Note *2 added to table 15.9
2
2
2
1
1
1
5.00* 7.00* 7.1424* 14.2848* 16.00* 18.00*
1
20.00*
Note 2 added
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
15.3.10 Serial Expansion
Mode Register (SEMR_0)
582
Table amended
010: Selects the average transfer rate 460.606 kbps ...
Rev. 5.00 Aug 08, 2006 page xxxiii of lxxxvi
Item
Page
Revision (See Manual for Details)
15.4 Operation in
Asynchronous Mode
585
Description amended
15.4.2 Receive Data
Sampling Timing and
Reception Margin in
Asynchronous Mode
587
... when the ABCS bit in SEMR_0 is 1 (H8S/2239 Group
only).
Description amended
... N : Bit rate ratio relative to clock (N = 16, but in the
H8S/2239 Group N = 8 if ABCS in SEMR_0 is set to 1.)
Note amended
Note: Example for H8S/2239 Group with the ABCS bit in
SEMR_0 set to a value other than 1. When ABCS is ...
Figure 15.6 Receive Data
Sampling Timing in
Asynchronous Mode
588
15.4.4 SCI Initialization
(Asynchronous Mode)
589
Note amended
Note: Example for H8S/2239 Group with the ABCS bit in
SEMR_0 set to a value other than 1. When ABCS is ...
Figure 15.8 amended
1
Set TE and RE* bits in SCR to 1, ...
Figure 15.8 Sample SCI
Initialization Flowchart
2
[3] ... bits ACS2 to ACS0 in SEMR_0* is used.
Note 2 added
Note: 2. Supported only by the H8S/2239 Group.
15.5.2 Multiprocessor Serial 600
Data Reception
Figure 15.16 Sample
Multiprocessor Serial
Reception Flowchart (1)
15.10.5 Restrictions on Use 626
of DMAC* or DTC
Figure 15.16 amended
(Before) Read MPIE bit in SCR → (After) Set MPIE bit in
SCR to 1
Note * added
Note: * Supported only by the H8S/2239 Group.
Figure 15.38 Example of
Clocked Synchronous
Transmission by DMAC* or
DTC
16.1 Features
633
Description amended
2
• Selection of I C bus format or clocked synchronous
serial format
634
Description amended
•
Interrupt sources
Data transfer end ...
Address match: when ... in slave receive mode
Start condition detection (in master mode)
Stop condition detection (in slave mode)
Rev. 5.00 Aug 08, 2006 page xxxiv of lxxxvi
Item
2
16.3.4 I C Bus Mode
Register (ICMR)
Page
Revision (See Manual for Details)
642
Table 16.3 amended
3
φ = 5 MHz*
2
Table 16.3 I C Transfer
Rate
2
16.3.6 I C Bus Control
Register (ICCR)
3
φ = 8 MHz*
Note 3 added
Note: 3. The H8S/2258 Group is out of operation.
646
Table amended
... (AS it might not be a condition to clear, for details, see
section 16.4.8, Operation Using the DTC)
2
16.4.1 I C Bus Data Format 653
Description amended
... in figure 16.3. The clocked synchronous serial format is a
non-addressing format with no acknowledge bit. ...
16.4.2 Initial Setting
655
Figure 16.6 Flowchart for IIC
Initialization (Example)
16.4.3 Master Transmit
Operation
Figure 16.6 amended
Set ICMR
656
Figure 16.7 amended
Yes
Figure 16.7 Flowchart for
Master Transmit Mode
(Example)
Clear IRIC flag in ICCR
[12] Generate stop condition.
Write ACKE = 0 (ICCR)
(Clear ACKB = 0)
Write BBSY = 0 and
SCP = 0 (ICCR)
End
657
Description amended
[6] ... The master device sequentially sends the transmit
clock and the data written to ICDR using the timing shown in
figure 16.8. The at the 9th ...
[12] ... Clear the IRIC flag to 0. Write 0 to BBSY and SCP ...
Figure 16.8 Example of
Master Transmit Mode
Operation Timing (MLS =
WAIT = 0)
658
Figure 16.8 amended
(Before) R/W → (After) R/W
Rev. 5.00 Aug 08, 2006 page xxxv of lxxxvi
Item
Page
Revision (See Manual for Details)
16.4.4 Master Receive
Operation
662
Description amended
[6] Clear the IRIC flag to 0. The reading of the ICDR flag
described in step [5] and the clearing of the IRIC flag to 0
should be performed consecutively, with no interrupt
processing occurring between them. During wait operation,
clear the IRIC flag to 0 when the value of counter BC2 to
BC0 is 2 or greater. If the IRIC flag is cleared to 0 when the
value of counter BC2 to BC0 is 1 or 0, it will not be possible
to determine when the transfer has completed. If condition
[3]-1 is true, ...
[11] Clear the IRIC flag to 0. As in step [6], read the ICDR
flag and clear the IRIC flag to 0 consecutively, with no
interrupt processing occurring between them. During wait
operation, clear the IRIC flag to 0 when the value of counter
BC2 to BC0 is 2 or greater.
Figure 16.13 Example of
664
Master Receive Mode top
condition Generation Timing
(MLS = ACKB = 0, WAIT = 1)
Figure 16.13 amended
[8] 1 clock cycle wait time
SCL
(master output)
8
9
SDA
Bit 0
(slave output)
Data 2
[3]
SDA
(master output)
1
2
3
Stop condition
generated
4
5
6
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2
Data 3
[3]
7
8
9
Bit 1 Bit 0
[12]
[12]
A
A
IRIC
IRTR
ICDR
User processing
[4] IRTR = 0
[4] IRTR = 1
Data 1
[13] IRTR = 0
Data 2
Data 3
[11] IRIC clearance
[6] IRIC clearance
[10] ICDR read (data 2)
[9] TRS set to 1
[7] ACKB set to 1
16.4.5 Slave Receive
Operation
666
[13] IRTR = 1
[14] IRIC clearance
[15] WAIT cleared to 0
IRIC clearance
[17] Stop condition
issued
[16] ICDR read (data 3)
Description amended
(5) Read ICDR and clear the IRIC flag in ICCR to 0. The
RDRF flag is cleared to 0. Read the IRDR flag and clear the
IRIC flag to 0 consecutively, with no interrupt processing
occurring between them. If the time needed to transmit one
byte of data elapses before the IRIC flag is cleared, it will not
be possible to determine when the transfer has completed.
Figure 16.15 Example of
667
Slave Receive Mode
Operation Timing (1) (MLS =
ACKB = 0)
Description of "Interrupt request generation" deleted from
figure 16.15
Figure 16.16 Example of
668
Slave Receive Mode
Operation Timing (2) (MLS =
ACKB = 0)
Description of "Interrupt request generation" deleted from
figure 16.16
Rev. 5.00 Aug 08, 2006 page xxxvi of lxxxvi
Item
Page
Revision (See Manual for Details)
16.4.6 Slave Transmit
Operation
669 to Section 16.4.6 description replaced
671
Figure 16.18 Example of
671
Slave Transmit Mode
Operation Timing (MLS = 0)
Figure 16.18 replaced
16.4.8 Operation Using the 673
DTC
Table 16.5 amended
Item
Table 16.5 Flags and
Transfer States
Master Transmit Master Receive
Mode
Mode
Slave Transmit
Mode
Slave Receive
Mode
Slave address + Transmission by Transmission by Reception by CPU
R/W bit
DTC (ICDR write) CPU (ICDR write) (ICDR read)
Reception by CPU
(ICDR read)
Transmission/
reception
Dummy data
read

Processing by

CPU (ICDR read)

Actual data
Transmission by Reception by
Transmission by
transmission/rec DTC (ICDR write) DTC (ICDR read) DTC (ICDR write)
eption
16.6 Usage Notes
676
Reception by DTC
(ICDR read)
Description amended
2
1. ... the start condition, read PORT in each I C bus output
pin, and check that SCL and SDA are both low. Even if the
ICE bit is set to 1, it is possible to monitor the pin state by
reading the PORT register so long as the DDR I/O port
register corresponding to the pin has been cleared to 0.Then
issue the instruction ...
2. Either of ...
 Read access to ICDR when ICE = 1 and TRS = 0
(including automatic transfer from ICDRS to ICDRR)
Table 16.8 Permissible SCL 678
Rise Time (tsr) Values
Note *2 added to table 16.8
2
2
1
1
φ = 5 MHz* φ = 8 MHz* φ = 16 MHz* φ = 20 MHz*
Note 2 added
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
2
Table 16.9 I C Bus Timing
(with Maximum Influence of
tSr/tSf)
679
Note *7 added to table 16.9
7
7
φ = 5 MHz* φ = 8 MHz*
680
Note 7 added
Note: 7. The H8S/2258 Group is out of operation.
Figure 16.22 Flowchart and 681
Timing of Start Condition
Instruction Issuance for
Retransmission
Figure 16.22 amended
(Before) [2] Determine whether SCL0 is low → (After)
Determine whether SCL is low
Rev. 5.00 Aug 08, 2006 page xxxvii of lxxxvi
Item
Page
Revision (See Manual for Details)
16.6 Usage Notes
684
Figure 16.26 amended
Figure 16.26 TRS Bit
Setting Timing in Slave Mode
17.1 Features
TRS bit
686,
687
Description of "16. Notes on Wait Operation in Master
Mode" added
689
Description added
• Selectable range voltages of analog inputs
The range of voltages of analog inputs to be converted can
be specified using the Vref signal as the analog reference
voltage.
Figure 17.1 Block Diagram 690
of A/D Converter
Figure 17.1 amended
AVCC
Vref
10-
AVSS
AN0
AN1
AN3
AN4
Multiplexer
AN2
AN5
AN6
AN7
17.4 Interface to Bus Master 696
Section 17.4 description added
18.1 Features
"• D/A output retaining function in software standby mode"
deleted
707
18.5.1 Analog Power Supply 711
Current in Power-Down Mode
Section 18.5.1 description replaced
20.1 Features
Figure 20.1 amended
716
H8S/2227: 128 kbytes
Figure 20.1 Block Diagram
of Flash Memory
20.3 Block Configuration
Figure 20.6 Block
Configuration of 256-kbyte
Flash Memory
722
Figure 20.6 amended
EB10 Erase unit 64 kbytes
Rev. 5.00 Aug 08, 2006 page xxxviii of lxxxvi
Item
Page
Revision (See Manual for Details)
20.8.2 Erase/Erase-Verify
741
Figure 20.12 amended
5
tse: Wait 10 ms*
Figure 20.12 Erase/EraseVerify Flowchart
5
n≥100?*
Note 5 added
Note: 5. This is a recommended value. To change it, consult
tables 27.12, 27.25, 27.37, 27.49, and 27.59 and select a
new value such that the erase time (tE), wait time after E1 bit
setting (tse), and maximum erase count (N) do not exceed
the maximum values indicated.
20.11 Programmer Mode
744
Figure 20.13 Socket
Adapter Pin Correspondence
Diagram
Figure 20.13 amended
3
4
5
FP-100B* TFP-100G* TBP-112A*
Notes amended
Notes: 1. Supported only by the H8S/2258 and H8S/2238B.
2. Supported only by the H8S/2238R.
3. Not supported by the H8S/2227.
4. Not supported by the H8S/2258.
5. Supported only by the H8S/2238R and H8S/2239.
20.13 Flash Memory
Programming and Erasing
Precautions
748
Figure 20.14 amended
1
MD2 to MD0*
Figure 20.14 Power-On/Off
Timing (Boot Mode)
Figure 20.15 Power-On/Off 749
Timing (User Program Mode)
Figure 20.15 amended
Figure 20.16 Mode
750
Transition Timing (Example:
Boot Mode →User
Mode↔User Program Mode)
Figure 20.16 amended
21.1 Features
•
753
1
MD2 to MD0*
MD2 to MD0
Size
HD6432236BW and HD6432238RW added
Product Class
H8S/2238 Group
HD6432238B
ROM Size
ROM Address (Modes 6 and 7)
256 kbytes
H'000000 to H'03FFFF
HD6432236B
128 kbytes
H'000000 to H'01FFFF
HD6432238R
256 kbytes
H'000000 to H'03FFFF
HD6432236R
128 kbytes
H'000000 to H'01FFFF
HD6432238BW
256 kbytes
H'000000 to H'03FFFF
HD6432236BW
128 kbytes
H'000000 to H'01FFFF
HD6432238RW
256 kbytes
H'000000 to H'03FFFF
HD6432236RW
128 kbytes
H'000000 to H'03FFFF
Rev. 5.00 Aug 08, 2006 page xxxix of lxxxvi
Item
Page
Revision (See Manual for Details)
22.3.1 Programming and
Verification
760
Figure 22.4 amended
Program width tOPW = 0.2n ms
Figure 22.4 High-Speed
Programming Flowchart
23.1.2 Low-Power Control
Register (LPWRCR)
768
DTON description amended
Direct Transfer ON Flag
23.2.1 Connecting a Crystal 771
Resonator
Note 1 amended
Note: 1. The H8S/2258 Group is out of operation.
Table 23.1 Damping
Resistance Value
Table 23.2 Crystal
Resonator Characteristics
771
Note 1 amended
Note: 1. The H8S/2258 Group is out of operation.
23.2.2 External Clock Input 
Table of "External Clock Input Conditions (2) (H8S/2238
Group, H8S/2237 Group, H8S/2227 Group)" deleted
Table 23.3 External Clock
Input Conditions (2)
(H8S/2238B, H8S/2236B)
773,
774
Tables 23.3 (2) to (4) added
774
Table title amended
Table 23.3 External Clock
Input Conditions (3)
(H8S/2238R, H8S/2236R)
Table 23.3 External Clock
Input Conditions (4)
(H8S/2237 Group, H8S/2227
Group)
Table 23.3 External Clock
Input Conditions (5)
(H8S/2239 Group)
23.2.2 External Clock Input 775
Note added
Table 23.4 External Clock
Input Conditions (Duty
Adjustment Circuit Unused)
(1) (H8S/2258 Group)
Note: If the duty adjustment circuit is not used, maximum
operating frequency is lowered according to the input
waveform. (Example: tEXL = tEXH = 37 ns, tEXr = tEXf = 7 ns,
clock cycle time = 88 ns, and maximum operating frequency
= 11.3 MHz)

Table of "External Clock Input Conditions (Duty Adjustment
Circuit Unused) (2) (H8S/2238 Group, H8S/2237 Group,
H8S/2227 Group)" deleted
Rev. 5.00 Aug 08, 2006 page xl of lxxxvi
Item
Page
23.2.2 External Clock Input 775,
Table 23.4 External Clock 776
Revision (See Manual for Details)
Tables 23.4 (2) to (4) added
Input Conditions (Duty
Adjustment Circuit Unused)
(2) (H8S/2238B, H8S/2236B)
Table 23.4 External Clock
Input Conditions (Duty
Adjustment Circuit Unused)
(3) (H8S/2238R, H8S/2236R)
Table 23.4 External Clock
Input Conditions (Duty
Adjustment Circuit Unused)
(4) (H8S/2237 Group,
H8S/2227 Group)
Table 23.4 External Clock
Input Conditions (Duty
Adjustment Circuit Unused)
(5) (H8S/2239 Group)
777
23.2.3 Notes on Switching
External Clock
778
Note amended
Note: When a duty adjustment circuit is not used, maximum
operating frequency is lowered according to the input
waveform. (Example: tEXL = tEXH = 25 ns, tEXr = tEXf = 5 ns,
clock cycle time = 60 ns, and maximum operating frequency
= 16.6 MHz)
Figure 23.7 amended
clock φ
Figure 23.7 External Clock
Switching Timing (Example)
standby time
External
interrupt
200 ns or more
Active (External clock 2)
23.7.1 Connecting 32.768- 780
kHz Crystal Resonator
(4)
Software standby mode
Active (External clock 1)
Figure 23.9 amended
Rs = 14 kΩ (typ)
Figure 23.9 Equivalence
Circuit for 32.768-kHz
Oscillator
23.7.2 Handling Pins when 781
Subclock Not Required
Description amended
Section 24 Power-Down
Mode
Note *5 added to table 24.1
3 5
D/A* *
Table 24.1 LSI Internal
States in Each Mode
784,
785
... LPWRCR must be set to 1. If the SUBSTP bit is not set to
1, transitions to the power-down modes may not complete
normally.
Note 5 added
Note: 5. The analog output value does not satisfy the
specified D/A absolute accuracy when D/A is halted
(retained). However, the H8S/2258 Group, H8S/2238B, and
H8S/2236B satisfy the specified D/A absolute accuracy.
Rev. 5.00 Aug 08, 2006 page xli of lxxxvi
Item
Page
24.1.2 Module Stop Control 789
Registers A to C (MSTPCRA
to MSTPCRC)
Revision (See Manual for Details)
•
MSTPCRA
Target module description of MSTPA0 amended
3
3
8-bit timer (TMR_2* , TMR_3* )
•
MSTPCRB
Target module description of MSTPB5 amended
4
Serial communication interface 2 (SCI_2* )
790
•
MSTPCRC
Bit 3 description amended
1 5
(Before) MSTPC3 * * → (After) MSTPC3
(Before) IEBus controller → (After) IEBus controller*
5
Notes 3 and 4 amended
Notes: 3. Not available in the H8S/2237 Group and
H8S/2227 Group.
4. Not available in the H8S/2227 Group.
790
Description amended
... The bus masters other than the CPU (DMAC* and DTC)...
24.2 Medium-Speed Mode 791
Notes * added
Note: * Supported only by the H8S/2239 Group.
24.4.3 Oscillation Settling 793
Time after Clearing Software
Standby Mode
Table 24.3 amended
STS2 STS1 STS0 Standby Time
4
2
6
MHz*2 MHz*2 MHz*2 Unit
Table 24.3 Oscillation
Settling Time Settings
0
0
1
1
0
1
0
8192 states
1.4
2.0
4.1
1
16384 states
2.7
4.1
8.2
ms
0
32768 states
5.5
8.2
16.4
1
65536 states
10.9
16.4
32.8
0
131072 states
21.8
32.8
65.5
1
262144 states
43.7
65.5
131.1
0
Reserved




1
16 states
2.7
4.0
8.0
µs
Notes 1 and 2 amended
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
24.6 Module Stop Mode
796
Note * added
DMAC*
Note: * Supported only by the H8S/2239 Group only.
Rev. 5.00 Aug 08, 2006 page xlii of lxxxvi
Item
Page
Revision (See Manual for Details)
24.12.4 On-Chip Module
Interrupt
801
•
Module Stop Mode
•
Subactive Mode/Watch Mode
Note *2 added
1
2
DMAC* IIC*
Notes: 1. Supported only by the H8S/2239 Group.
2. Not available in the H8S/2237 Group and H8S/2227
Group.
26.3 Register States in Each 837
Operating Mode
27.1 Power Supply Voltage 841
and Operating Frequency
Range
Table amended
Register
Name
Reset
Mediumspeed
Sleep
Module
Stop
Watch
ICDR_0
Initialized Initialized 
Manual
Reset
Highspeed




Subactive

Subsleep

Software Hardware
Standby Standby Module

Initialized
SARX_0
Initialized Initialized 







Initialized
ICMR_0
Initialized Initialized 







Initialized
SAR_0
Initialized Initialized 







Initialized
IIC_0
Figure 27.3 title amended
Figure 27.3 Power Supply
Voltage and Operating
Frequency Ranges
(H8S/2238B and H8S/2236B)
Figure 27.4 Power Supply 842
Voltage and Operating
Frequency Ranges
(H8S/2238R and H8S/2236R)
Figure 27.4 title amended
Rev. 5.00 Aug 08, 2006 page xliii of lxxxvi
Item
Page
Revision (See Manual for Details)
27.2.2 DC Characteristics
845,
846
Table 27.2 amended
Table 27.2 DC
Characteristics (1)
Item
Input high
voltage
Symbol
RES, STBY,
NMI, MD2 to
MD0, FWE
VIH
EXTAL, Ports
1, 3, 7, and A
to G
Ports 4 and 9
Input low
voltage
RES, STBY,
MD2 to MD0,
FWE
VIL
NMI, EXTAL,
Ports 1, 3, 4,
7, 9, and A to
G
Input
leakage
current
RES
| Iin |
STBY, NMI,
MD2 to MD0,
FWE
Ports 4 and 9
27.2.6 Flash Memory
Characteristics
863
Note: 7. Reference value at 25°C. (Normally, it is a
reference that rewriting is enabled up to this value.)
Table 27.12 Flash Memory
Characteristics
27.3.2 DC Characteristics
868
Table 27.14 DC
Characteristics (3)
870
27.3.5 D/A Conversion
Characteristics
884
Note 3 amended
Note: 3. The values are for VRAM ≤ VCC < 2.2 V, VIH min =
VCC – 0.2, and VIL max = 0.2 V.
Table 27.24 D/A Conversion
Characteristics
Table 27.25 Flash Memory
Characteristics
Note 3 amended
Note: 3. The values are for VRAM ≤ VCC < 2.7 V, VIH min =
VCC – 0.2, and VIL max = 0.2 V.
Table 27.14 DC
Characteristics (2)
27.3.6 Flash Memory
Characteristics
Note 7 amended
Table 27.24 amended
Absolute accuracy*
Note: * Does not apply in module stop mode, software
standby mode, watch mode, subactive mode, or subsleep
mode.
885
Table 27.25 amended
Item
Symbol Min
Programming time*1*2*4
Erase time*1*3*5
tP

10
200
ms/128 bytes
tE

100
1200
ms/block
Reprogramming count
Data hold time*8
NWEC
100*6
10000*7 
Times
tDRP
10

year
Rev. 5.00 Aug 08, 2006 page xliv of lxxxvi
Typ
Max

Unit
Test
Conditions
Item
Page
Revision (See Manual for Details)
27.3.6 Flash Memory
Characteristics
886
Notes 6 and 7 amended, note 8 added
Notes: 6. The minimum times that all characteristics after
rewriting are guaranteed. (A range between 1 and minimum
value is guaranteed.)
Table 27.25 Flash Memory
Characteristics
7. The reference value at 25°C. (Normally, it is a reference
that rewriting is enabled up to this value.)
8. Data hold characteristics when rewriting is performed
within the range of specifications including minimum value.
27.4 Electrical
887
Characteristics of H8S/2238B
and H8S/2236B
Section 27.4 title amended
27.4.2 DC Characteristics
Note 2 amended
889
Note: 2. In order to output high level, a pull-up resistance
must be connected externally.
Table 27.27 DC
Characteristics (1)
27.4.6 Flash Memory
Characteristics
905
Table 27.37 Flash Memory
Characteristics
906
Table 27.37 amended
Test
Conditions
Item
Symbol
Min
Typ
Max
Unit
Programming time*1*2*4
tP

10
200
ms/
128 bytes
Erase time*1*3*5
tE

100
1200
Rewrite times
NWEC
100*6 10000*7 
Times
Data holding time*8
tDRP
10

Years

ms/block
Notes 6 and 7 amended, note 8 added
Notes: 6. The minimum times that all characteristics after
rewriting are guaranteed. (A range between 1 and minimum
value is guaranteed.)
7. The reference value at 25°C. (Normally, it is a reference
that rewriting is enabled up to this value.)
8. Data hold characteristics when rewriting is performed
within the range of specifications including minimum value.
27.5.5 D/A Conversion
Characteristics
924
Absolute accuracy*
Table 27.48 D/A Conversion
Characteristics
27.5.6 Flash Memory
Characteristics
Table 27.48 amended
Note * added
Note: * Does not apply in module stop mode, software
standby mode, watch mode, subactive mode, or subsleep
mode.
925
Table 27.49 amended
Item
Table 27.49 Flash Memory
Characteristics
*1*2*4
Programming time
Erase time*1*3*5
Reprogramming count
8
Data holding time*
Symbol
Min
Typ
tP

10
tE

NWEC
100
tDRP
10
Max
200
ms/128 bytes
1200
ms/block
10000

Times


year
100
*6
Unit
*7
Test
Conditions
Rev. 5.00 Aug 08, 2006 page xlv of lxxxvi
Item
Page
Revision (See Manual for Details)
27.5.6 Flash Memory
Characteristics
926
Notes 6 and 7 amended, note 8 added
Notes: 6. The minimum times that all characteristics after
rewriting are guaranteed. (A range between 1 and minimum
value is guaranteed.)
Table 27.49 Flash Memory
Characteristics
7. The reference value at 25°C. (Normally, it is a reference
that rewriting is enabled up to this value.)
8. Data hold characteristics when rewriting is performed
within the range of specifications including minimum value.
27.6.2 DC Characteristics
936
Conditions (ZTAT version and F-ZTAT version):
Table 27.52 Permissible
Output Currents
27.6.5 D/A Conversion
Characteristics
945
Table 27.58 D/A Conversion
Characteristics
27.6.6 Flash Memory
Characteristics
Table 27.52 amended
Table 27.58 amended
Absolute accuracy*
Note: * Does not apply in module stop mode, software
standby mode, watch mode, subactive mode, or subsleep
mode.
946
Table 27.59 Flash Memory
Characteristics
947
Table 27.59 amended
Item
Symbol Min
Typ
Max
Programming time*1*2*4
Erase time*1*3*5
tP

10
200
ms/128 bytes
tE

100
1200
ms/block
Reprogramming count
Data holding time*8
NWEC
100*6
10000*7 
Times
tDRP
10

year

Unit
Test
Conditions
Notes 6 and 7 amended, note 8 added
Notes: 6. The minimum times that all characteristics after
rewriting are guaranteed. (A range between 1 and minimum
value is guaranteed.)
7. The reference value at 25°C. (Normally, it is a reference
that rewriting is enabled up to this value.)
8. Data hold characteristics when rewriting is performed
within the range of specifications including minimum value.
A.1 I/O Port State in Each
Pin State
967
Note 2 amended
Note: 2. Not available in the H8S/2237 Group and
H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page xlvi of lxxxvi
Contents
Section 1 Overview .............................................................................................................
1.1
1.2
1.3
1
Features ............................................................................................................................. 1
Internal Block Diagram..................................................................................................... 4
Pin Description.................................................................................................................. 9
1.3.1 Pin Arrangement .................................................................................................. 9
1.3.2 Pin Arrangements in Each Mode ......................................................................... 20
1.3.3 Pin Functions ....................................................................................................... 44
Section 2 CPU ...................................................................................................................... 63
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Features .............................................................................................................................
2.1.1 Differences between H8S/2600 CPU and H8S/2000 CPU ..................................
2.1.2 Differences from H8/300 CPU ............................................................................
2.1.3 Differences from H8/300H CPU..........................................................................
CPU Operating Modes ......................................................................................................
2.2.1 Normal Mode .......................................................................................................
2.2.2 Advanced Mode ...................................................................................................
Address Space ...................................................................................................................
Register Configuration ......................................................................................................
2.4.1 General Registers .................................................................................................
2.4.2 Program Counter (PC) .........................................................................................
2.4.3 Extended Control Register (EXR) .......................................................................
2.4.4 Condition-Code Register (CCR) ..........................................................................
2.4.5 Initial Values of CPU Registers ...........................................................................
Data Formats .....................................................................................................................
2.5.1 General Register Data Formats ............................................................................
2.5.2 Memory Data Formats .........................................................................................
Instruction Set ...................................................................................................................
2.6.1 Table of Instructions Classified by Function .......................................................
2.6.2 Basic Instruction Formats ....................................................................................
Addressing Modes and Effective Address Calculation .....................................................
2.7.1 Register Direct—Rn.............................................................................................
2.7.2 Register Indirect—@ERn ....................................................................................
2.7.3 Register Indirect with Displacement—@(d:16, ERn) or @(d:32, ERn)..............
2.7.4 Register Indirect with Post-Increment—@ERn+ or Register Indirect
with Pre-Decrement—@-ERn .............................................................................
2.7.5 Absolute Address—@aa:8, @aa:16, @aa:24, or @aa:32....................................
2.7.6 Immediate—#xx:8, #xx:16, or #xx:32 .................................................................
63
64
65
65
66
66
67
70
71
72
73
73
74
75
76
76
78
79
80
89
90
91
91
91
91
91
92
Rev. 5.00 Aug 08, 2006 page xlvii of lxxxvi
2.8
2.9
2.7.7 Program-Counter Relative—@(d:8, PC) or @(d:16, PC)....................................
2.7.8 Memory Indirect—@@aa:8 ................................................................................
2.7.9 Effective Address Calculation .............................................................................
Processing States...............................................................................................................
Usage Notes ......................................................................................................................
2.9.1 TAS Instruction....................................................................................................
2.9.2 STM/LDM Instruction .........................................................................................
2.9.3 Bit Manipulation Instructions ..............................................................................
2.9.4 Access Methods for Registers with Write-Only Bits ...........................................
92
93
94
96
98
98
98
98
100
Section 3 MCU Operating Modes .................................................................................. 103
3.1
3.2
3.3
3.4
Operating Mode Selection.................................................................................................
Register Descriptions ........................................................................................................
3.2.1 Mode Control Register (MDCR) .........................................................................
3.2.2 System Control Register (SYSCR) ......................................................................
Operating Mode Descriptions ...........................................................................................
3.3.1 Mode 4 .................................................................................................................
3.3.2 Mode 5 .................................................................................................................
3.3.3 Mode 6 .................................................................................................................
3.3.4 Mode 7 .................................................................................................................
3.3.5 Pin Functions .......................................................................................................
Memory Map in Each Operating Mode ............................................................................
103
104
104
105
106
106
106
107
107
108
109
Section 4 Exception Handling ......................................................................................... 119
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
Exception Handling Types and Priority ............................................................................
Exception Sources and Exception Vector Table ...............................................................
Reset121
4.3.1 Reset Types..........................................................................................................
4.3.2 Reset Exception Handling....................................................................................
4.3.3 Interrupts after Reset............................................................................................
4.3.4 State of On-Chip Peripheral Modules after Reset Release...................................
Traces................................................................................................................................
Interrupts ...........................................................................................................................
Trap Instruction.................................................................................................................
Stack Status after Exception Handling..............................................................................
Usage Note........................................................................................................................
119
119
121
122
123
123
123
124
124
125
126
Section 5 Interrupt Controller .......................................................................................... 127
5.1
5.2
Features ............................................................................................................................. 127
Input/Output Pins .............................................................................................................. 129
Rev. 5.00 Aug 08, 2006 page xlviii of lxxxvi
5.3
5.4
5.5
5.6
Register Descriptions ........................................................................................................
5.3.1 Interrupt Priority Registers A to L, and O (IPRA to IPRL, IPRO) ......................
5.3.2 IRQ Enable Register (IER) ..................................................................................
5.3.3 IRQ Sense Control Registers H and L (ISCRH and ISCRL) ...............................
5.3.4 IRQ Status Register (ISR)....................................................................................
Interrupt Sources ...............................................................................................................
5.4.1 External Interrupts................................................................................................
5.4.2 Internal Interrupts.................................................................................................
5.4.3 Interrupt Exception Handling Vector Table.........................................................
Operation...........................................................................................................................
5.5.1 Interrupt Control Modes and Interrupt Operation ................................................
5.5.2 Interrupt Control Mode 0 .....................................................................................
5.5.3 Interrupt Control Mode 2 .....................................................................................
5.5.4 Interrupt Exception Handling Sequence ..............................................................
5.5.5 Interrupt Response Times ....................................................................................
5.5.6 DTC and DMAC Activation by Interrupt ............................................................
Usage Notes ......................................................................................................................
5.6.1 Contention between Interrupt Generation and Disabling.....................................
5.6.2 Instructions that Disable Interrupts ......................................................................
5.6.3 When Interrupts are Disabled...............................................................................
5.6.4 Interrupts during Execution of EEPMOV Instruction..........................................
129
130
131
131
134
135
135
136
136
142
142
145
147
148
150
151
154
154
155
155
155
Section 6 PC Break Controller (PBC) ........................................................................... 157
6.1
6.2
6.3
6.4
Features .............................................................................................................................
Register Descriptions ........................................................................................................
6.2.1 Break Address Register A (BARA) .....................................................................
6.2.2 Break Address Register B (BARB)......................................................................
6.2.3 Break Control Register A (BCRA) ......................................................................
6.2.4 Break Control Register B (BCRB).......................................................................
Operation...........................................................................................................................
6.3.1 PC Break Interrupt Due to Instruction Fetch........................................................
6.3.2 PC Break Interrupt Due to Data Access...............................................................
6.3.3 Notes on PC Break Interrupt Handling ................................................................
6.3.4 Operation in Transitions to Power-Down Modes.................................................
6.3.5 When Instruction Execution Is Delayed by One State .........................................
Usage Notes ......................................................................................................................
6.4.1 Module Stop Mode Setting ..................................................................................
6.4.2 PC Break Interrupts..............................................................................................
6.4.3 CMFA and CMFB ...............................................................................................
6.4.4 PC Break Interrupt when DTC and DMAC Is Bus Master ..................................
157
158
158
159
159
160
160
160
161
161
161
162
163
163
163
163
163
Rev. 5.00 Aug 08, 2006 page xlix of lxxxvi
6.4.5
6.4.6
6.4.7
6.4.8
PC Break Set for Instruction Fetch at Address Following BSR, JSR, JMP,
TRAPA, RTE, and RTS Instruction.....................................................................
I Bit Set by LDC, ANDC, ORC, and XORC Instruction.....................................
PC Break Set for Instruction Fetch at Address Following Bcc Instruction..........
PC Break Set for Instruction Fetch at Branch Destination Address of Bcc
Instruction ............................................................................................................
163
164
164
164
Section 7 Bus Controller ................................................................................................... 165
7.1
7.2
7.3
Features .............................................................................................................................
Input/Output Pins ..............................................................................................................
Register Descriptions ........................................................................................................
7.3.1 Bus Width Control Register (ABWCR)...............................................................
7.3.2 Access State Control Register (ASTCR) .............................................................
7.3.3 Wait Control Registers H and L (WCRH, WCRL)..............................................
7.3.4 Bus Control Register H (BCRH) .........................................................................
7.3.5 Bus Control Register L (BCRL) ..........................................................................
7.3.6 Pin Function Control Register (PFCR) ................................................................
7.4 Bus Control .......................................................................................................................
7.4.1 Area Divisions .....................................................................................................
7.4.2 Bus Specifications................................................................................................
7.4.3 Bus Interface for Each Area.................................................................................
7.4.4 Chip Select Signals ..............................................................................................
7.5 Basic Timing.....................................................................................................................
7.5.1 On-Chip Memory (ROM, RAM) Access Timing ................................................
7.5.2 On-Chip Peripheral Module Access Timing........................................................
7.5.3 External Address Space Access Timing ..............................................................
7.6 Basic Bus Interface ...........................................................................................................
7.6.1 Data Size and Data Alignment.............................................................................
7.6.2 Valid Strobes........................................................................................................
7.6.3 Basic Timing........................................................................................................
7.6.4 Wait Control ........................................................................................................
7.7 Burst ROM Interface.........................................................................................................
7.7.1 Basic Timing........................................................................................................
7.7.2 Wait Control ........................................................................................................
7.8 Idle Cycle ..........................................................................................................................
7.9 Bus Release.......................................................................................................................
7.9.1 Bus Release Usage Note ......................................................................................
7.10 Bus Arbitration..................................................................................................................
7.10.1 Operation .............................................................................................................
7.10.2 Bus Transfer Timing ............................................................................................
Rev. 5.00 Aug 08, 2006 page l of lxxxvi
165
167
167
168
168
169
172
173
174
175
175
176
177
178
178
179
180
181
181
181
182
183
190
192
192
194
194
197
198
199
199
200
7.10.3 External Bus Release Usage Note........................................................................ 200
7.11 Resets and the Bus Controller ........................................................................................... 201
Section 8 DMA Controller (DMAC) ............................................................................. 203
8.1
8.2
8.3
8.4
8.5
8.6
8.7
Features .............................................................................................................................
Input/Output Pins ..............................................................................................................
Register Descriptions ........................................................................................................
8.3.1 Memory Address Registers (MARA and MARB) ...............................................
8.3.2 I/O Address Registers (IOARA and IOARB) ......................................................
8.3.3 Execute Transfer Count Registers (ETCRA and ETCRB)...................................
8.3.4 DMA Control Registers (DMACRA and DMACRB) .........................................
8.3.5 DMA Band Control Registers H and L (DMABCRH and DMABCRL).............
8.3.6 DMA Write Enable Register (DMAWER) ..........................................................
8.3.7 DMA Terminal Control Register (DMATCR).....................................................
Activation Sources ............................................................................................................
8.4.1 Activation by Internal Interrupt Request..............................................................
8.4.2 Activation by External Request ...........................................................................
8.4.3 Activation by Auto-Request.................................................................................
Operation...........................................................................................................................
8.5.1 Transfer Modes ....................................................................................................
8.5.2 Sequential Mode ..................................................................................................
8.5.3 Idle Mode.............................................................................................................
8.5.4 Repeat Mode ........................................................................................................
8.5.5 Single Address Mode ...........................................................................................
8.5.6 Normal Mode .......................................................................................................
8.5.7 Block Transfer Mode ...........................................................................................
8.5.8 Basic Bus Cycles..................................................................................................
8.5.9 DMA Transfer (Dual Address Mode) Bus Cycles ...............................................
8.5.10 DMA Transfer (Single Address Mode) Bus Cycles.............................................
8.5.11 Multi-Channel Operation .....................................................................................
8.5.12 Relation between DMAC and External Bus Requests, and DTC ........................
8.5.13 DMAC and NMI Interrupts..................................................................................
8.5.14 Forced Termination of DMAC Operation............................................................
8.5.15 Clearing Full Address Mode ................................................................................
Interrupt Sources ...............................................................................................................
Usage Notes ......................................................................................................................
8.7.1 DMAC Register Access during Operation...........................................................
8.7.2 Module Stop.........................................................................................................
8.7.3 Medium-Speed Mode...........................................................................................
8.7.4 Activation by Falling Edge on DREQ Pin ...........................................................
203
205
205
207
207
208
209
218
229
231
231
232
233
233
234
234
236
239
241
244
248
251
256
257
265
271
272
272
273
274
275
276
276
277
277
278
Rev. 5.00 Aug 08, 2006 page li of lxxxvi
8.7.5
8.7.6
8.7.7
Activation Source Acceptance ............................................................................. 278
Internal Interrupt after End of Transfer................................................................ 278
Channel Re-Setting .............................................................................................. 279
Section 9 Data Transfer Controller (DTC) ................................................................... 281
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
Features .............................................................................................................................
Register Descriptions ........................................................................................................
9.2.1 DTC Mode Register A (MRA) ............................................................................
9.2.2 DTC Mode Register B (MRB).............................................................................
9.2.3 DTC Source Address Register (SAR)..................................................................
9.2.4 DTC Destination Address Register (DAR)..........................................................
9.2.5 DTC Transfer Count Register A (CRA) ..............................................................
9.2.6 DTC Transfer Count Register B (CRB)...............................................................
9.2.7 DTC Enable Registers A to G, and I (DTCERA to DTCERG, and DTCERI) ....
9.2.8 DTC Vector Register (DTVECR)........................................................................
Activation Sources ............................................................................................................
Location of Register Information and DTC Vector Table ................................................
Operation ..........................................................................................................................
9.5.1 Normal Mode.......................................................................................................
9.5.2 Repeat Mode ........................................................................................................
9.5.3 Block Transfer Mode ...........................................................................................
9.5.4 Chain Transfer .....................................................................................................
9.5.5 Interrupts..............................................................................................................
9.5.6 Operation Timing.................................................................................................
9.5.7 Number of DTC Execution States........................................................................
Procedures for Using DTC................................................................................................
9.6.1 Activation by Interrupt.........................................................................................
9.6.2 Activation by Software ........................................................................................
Examples of Use of the DTC ............................................................................................
9.7.1 Normal Mode.......................................................................................................
9.7.2 Software Activation .............................................................................................
Usage Notes ......................................................................................................................
9.8.1 Module Stop Mode Setting ..................................................................................
9.8.2 On-Chip RAM .....................................................................................................
9.8.3 DTCE Bit Setting.................................................................................................
281
282
283
285
285
285
286
286
286
288
289
290
294
295
295
296
298
299
299
301
302
302
302
303
303
303
304
304
304
304
Section 10 I/O Ports ............................................................................................................ 305
10.1 Port 1................................................................................................................................. 309
10.1.1 Port 1 Data Direction Register (P1DDR)............................................................. 309
10.1.2 Port 1 Data Register (P1DR)................................................................................ 310
Rev. 5.00 Aug 08, 2006 page lii of lxxxvi
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.1.3 Port 1 Register (PORT1)......................................................................................
10.1.4 Pin Functions .......................................................................................................
Port 3.................................................................................................................................
10.2.1 Port 3 Data Direction Register (P3DDR).............................................................
10.2.2 Port 3 Data Register (P3DR)................................................................................
10.2.3 Port 3 Register (PORT3)......................................................................................
10.2.4 Port 3 Open Drain Control Register (P3ODR).....................................................
10.2.5 Pin Functions .......................................................................................................
Port 4.................................................................................................................................
10.3.1 Port 4 Register (PORT4)......................................................................................
10.3.2 Pin Functions .......................................................................................................
Port 7.................................................................................................................................
10.4.1 Port 7 Data Direction Register (P7DDR).............................................................
10.4.2 Port 7 Data Register (P7DR)................................................................................
10.4.3 Port 7 Register (PORT7)......................................................................................
10.4.4 Pin Functions .......................................................................................................
Port 9.................................................................................................................................
10.5.1 Port 9 Register (PORT9)......................................................................................
10.5.2 Pin Functions .......................................................................................................
Port A................................................................................................................................
10.6.1 Port A Data Direction Register (PADDR) ...........................................................
10.6.2 Port A Data Register (PADR) ..............................................................................
10.6.3 Port A Register (PORTA) ....................................................................................
10.6.4 Port A Pull-Up MOS Control Register (PAPCR) ................................................
10.6.5 Port A Open Drain Control Register (PAODR)...................................................
10.6.6 Pin Functions .......................................................................................................
10.6.7 Input Pull-Up MOS States in Port A....................................................................
Port B ................................................................................................................................
10.7.1 Port B Data Direction Register (PBDDR)............................................................
10.7.2 Port B Data Register (PBDR) ..............................................................................
10.7.3 Port B Register (PORTB) ....................................................................................
10.7.4 Port B Pull-Up MOS Control Register (PBPCR).................................................
10.7.5 Pin Functions .......................................................................................................
10.7.6 Input Pull-Up MOS States in Port B ....................................................................
Port C ................................................................................................................................
10.8.1 Port C Data Direction Register (PCDDR)............................................................
10.8.2 Port C Data Register (PCDR) ..............................................................................
10.8.3 Port C Register (PORTC) ....................................................................................
10.8.4 Port C Pull-Up MOS Control Register (PCPCR).................................................
10.8.5 Pin Functions .......................................................................................................
310
311
315
315
316
316
317
317
321
321
321
322
322
323
323
324
327
327
327
328
328
328
329
329
329
330
332
332
333
333
334
334
334
339
339
340
340
341
341
342
Rev. 5.00 Aug 08, 2006 page liii of lxxxvi
10.8.6 Input Pull-Up MOS States in Port C....................................................................
10.9 Port D................................................................................................................................
10.9.1 Port D Data Direction Register (PDDDR) ...........................................................
10.9.2 Port D Data Register (PDDR)..............................................................................
10.9.3 Port D Register (PORTD)....................................................................................
10.9.4 Port D Pull-Up MOS Control Register (PDPCR) ................................................
10.9.5 Pin Functions .......................................................................................................
10.9.6 Input Pull-Up MOS States in Port D....................................................................
10.10 Port E ................................................................................................................................
10.10.1 Port E Data Direction Register (PEDDR) ............................................................
10.10.2 Port E Data Register (PEDR)...............................................................................
10.10.3 Port E Register (PORTE).....................................................................................
10.10.4 Port E Pull-Up MOS Control Register (PEPCR) .................................................
10.10.5 Pin Functions .......................................................................................................
10.10.6 Input Pull-Up MOS States in Port E ....................................................................
10.11 Port F ................................................................................................................................
10.11.1 Port F Data Direction Register (PFDDR) ............................................................
10.11.2 Port F Data Register (PFDR) ...............................................................................
10.11.3 Port F Register (PORTF) .....................................................................................
10.11.4 Pin Functions .......................................................................................................
10.12 Port G................................................................................................................................
10.12.1 Port G Data Direction Register (PGDDR) ...........................................................
10.12.2 Port G Data Register (PGDR)..............................................................................
10.12.3 Port G Register (PORTG)....................................................................................
10.12.4 Pin Functions .......................................................................................................
342
343
343
344
344
345
345
346
346
347
347
348
348
349
349
350
350
351
351
352
354
354
355
355
355
Section 11 16-Bit Timer Pulse Unit (TPU) .................................................................. 359
11.1 Features .............................................................................................................................
11.2 Input/Output Pins ..............................................................................................................
11.3 Register Descriptions ........................................................................................................
11.3.1 Timer Control Register (TCR).............................................................................
11.3.2 Timer Mode Register (TMDR) ............................................................................
11.3.3 Timer I/O Control Register (TIOR) .....................................................................
11.3.4 Timer Interrupt Enable Register (TIER) ..............................................................
11.3.5 Timer Status Register (TSR)................................................................................
11.3.6 Timer Counter (TCNT)........................................................................................
11.3.7 Timer General Register (TGR) ............................................................................
11.3.8 Timer Start Register (TSTR) ...............................................................................
11.3.9 Timer Synchronous Register (TSYR)..................................................................
11.4 Operation ..........................................................................................................................
Rev. 5.00 Aug 08, 2006 page liv of lxxxvi
359
364
365
367
372
373
391
393
396
396
396
397
398
11.5
11.6
11.7
11.8
11.9
11.10
11.4.1 Basic Functions....................................................................................................
11.4.2 Synchronous Operation........................................................................................
11.4.3 Buffer Operation ..................................................................................................
11.4.4 Cascaded Operation .............................................................................................
11.4.5 PWM Modes ........................................................................................................
11.4.6 Phase Counting Mode ..........................................................................................
Interrupt Sources ...............................................................................................................
DTC Activation.................................................................................................................
DMAC Activation (H8S/2239 Group Only) .....................................................................
A/D Converter Activation .................................................................................................
Operation Timing ..............................................................................................................
11.9.1 Input/Output Timing ............................................................................................
11.9.2 Interrupt Signal Timing........................................................................................
Usage Notes ......................................................................................................................
11.10.1 Module Stop Mode Setting ..................................................................................
11.10.2 Input Clock Restrictions.......................................................................................
11.10.3 Caution on Cycle Setting .....................................................................................
11.10.4 Contention between TCNT Write and Clear Operations .....................................
11.10.5 Contention between TCNT Write and Increment Operations ..............................
11.10.6 Contention between TGR Write and Compare Match .........................................
11.10.7 Contention between Buffer Register Write and Compare Match.........................
11.10.8 Contention between TGR Read and Input Capture..............................................
11.10.9 Contention between TGR Write and Input Capture.............................................
11.10.10 Contention between Buffer Register Write and Input Capture ........................
11.10.11 Contention between Overflow/Underflow and Counter Clearing....................
11.10.12 Contention between TCNT Write and Overflow/Underflow...........................
11.10.13 Multiplexing of I/O Pins ..................................................................................
11.10.14 Interrupts and Module Stop Mode ...................................................................
398
403
405
409
411
416
423
425
425
426
426
426
430
433
433
433
434
434
435
436
436
437
438
438
439
440
440
440
Section 12 8-Bit Timers ..................................................................................................... 441
12.1 Features .............................................................................................................................
12.2 Input/Output Pins ..............................................................................................................
12.3 Register Descriptions ........................................................................................................
12.3.1 Timer Counter (TCNT)........................................................................................
12.3.2 Time Constant Register A (TCORA)...................................................................
12.3.3 Time Constant Register B (TCORB) ...................................................................
12.3.4 Timer Control Register (TCR) .............................................................................
12.3.5 Timer Control/Status Register (TCSR) ................................................................
12.4 Operation...........................................................................................................................
12.4.1 Pulse Output.........................................................................................................
441
443
443
444
444
445
445
447
452
452
Rev. 5.00 Aug 08, 2006 page lv of lxxxvi
12.5 Operation Timing..............................................................................................................
12.5.1 TCNT Incrementation Timing .............................................................................
12.5.2 Timing of CMFA and CMFB Setting when a Compare-Match Occurs...............
12.5.3 Timing of Timer Output when a Compare-Match Occurs ...................................
12.5.4 Timing of Compare-Match Clear when a Compare-Match Occurs .....................
12.5.5 TCNT External Reset Timing ..............................................................................
12.5.6 Timing of Overflow Flag (OVF) Setting .............................................................
12.6 Operation with Cascaded Connection ...............................................................................
12.6.1 16-Bit Count Mode ..............................................................................................
12.6.2 Compare-Match Count Mode ..............................................................................
12.7 Interrupt Sources ...............................................................................................................
12.7.1 Interrupt Sources and DTC Activation ................................................................
12.7.2 A/D Converter Activation....................................................................................
12.8 Usage Notes ......................................................................................................................
12.8.1 Contention between TCNT Write and Clear........................................................
12.8.2 Contention between TCNT Write and Increment ................................................
12.8.3 Contention between TCOR Write and Compare-Match ......................................
12.8.4 Contention between Compare-Matches A and B.................................................
12.8.5 Switching of Internal Clocks and TCNT Operation.............................................
12.8.6 Contention between Interrupts and Module Stop Mode ......................................
12.8.7 Mode Setting of Cascaded Connection ................................................................
453
453
454
455
455
456
456
457
457
457
458
458
458
459
459
459
460
461
461
463
463
Section 13 Watchdog Timer (WDT)..............................................................................
13.1 Features .............................................................................................................................
13.2 Input/Output Pins ..............................................................................................................
13.3 Register Descriptions ........................................................................................................
13.3.1 Timer Counter (TCNT)........................................................................................
13.3.2 Timer Control/Status Register (TCSR)................................................................
13.3.3 Reset Control/Status Register (RSTCSR) (only WDT_0) ...................................
13.4 Operation ..........................................................................................................................
13.4.1 Watchdog Timer Mode ........................................................................................
13.4.2 Interval Timer Mode ............................................................................................
13.4.3 Timing of Setting Overflow Flag (OVF) .............................................................
13.4.4 Timing of Setting Watchdog Timer Overflow Flag (WOVF) .............................
13.5 Interrupt Sources ...............................................................................................................
13.6 Usage Notes ......................................................................................................................
13.6.1 Notes on Register Access.....................................................................................
13.6.2 Contention between Timer Counter (TCNT) Write and Increment .....................
13.6.3 Changing Value of CKS2 to CKS0......................................................................
13.6.4 Switching between Watchdog Timer Mode and Interval Timer Mode................
465
465
467
467
468
468
472
473
473
474
475
476
476
477
477
478
479
479
Rev. 5.00 Aug 08, 2006 page lvi of lxxxvi
13.6.5 Internal Reset in Watchdog Timer Mode............................................................. 479
13.6.6 OVF Flag Clearing in Interval Timer Mode ........................................................ 479
Section 14 IEBus Controller (IEB) [H8S/2258 Group] .......................................
14.1 Features .............................................................................................................................
14.1.1 IEBus Communications Protocol.........................................................................
14.1.2 Communications Protocol....................................................................................
14.1.3 Transfer Data (Data Field Contents) ....................................................................
14.1.4 Bit Format ............................................................................................................
14.2 Input/Output Pins ..............................................................................................................
14.3 Register Descriptions ........................................................................................................
14.3.1 IEBus Control Register (IECTR) .........................................................................
14.3.2 IEBus Command Register (IECMR) ...................................................................
14.3.3 IEBus Master Control Register (IEMCR) ............................................................
14.3.4 IEBus Master Unit Address Register 1 (IEAR1) .................................................
14.3.5 IEBus Master Unit Address Register 2 (IEAR2) .................................................
14.3.6 IEBus Slave Address Setting Register 1 (IESA1)................................................
14.3.7 IEBus Slave Address Setting Register 2 (IESA2)................................................
14.3.8 IEBus Transmit Message Length Register (IETBFL)..........................................
14.3.9 IEBus Transmit Buffer Register (IETBR) ...........................................................
14.3.10 IEBus Reception Master Address Register 1 (IEMA1) .......................................
14.3.11 IEBus Reception Master Address Register 2 (IEMA2) .......................................
14.3.12 IEBus Receive Control Field Register (IERCTL)................................................
14.3.13 IEBus Receive Message Length Register (IERBFL) ...........................................
14.3.14 IEBus Receive Buffer Register (IERBR).............................................................
14.3.15 IEBus Lock Address Register 1 (IELA1) ............................................................
14.3.16 IEBus Lock Address Register 2 (IELA2) ............................................................
14.3.17 IEBus General Flag Register (IEFLG).................................................................
14.3.18 IEBus Transmit/Runaway Status Register (IETSR) ............................................
14.3.19 IEBus Transmit/Runaway Interrupt Enable Register (IEIET) .............................
14.3.20 IEBus Transmit Error Flag Register (IETEF) ......................................................
14.3.21 IEBus Receive Status Register (IERSR) ..............................................................
14.3.22 IEBus Receive Interrupt Enable Register (IEIER)...............................................
14.3.23 IEBus Receive Error Flag Register (IEREF) .......................................................
14.4 Operation Descriptions......................................................................................................
14.4.1 Master Transmit Operation ..................................................................................
14.4.2 Slave Receive Operation ......................................................................................
14.4.3 Master Reception .................................................................................................
14.4.4 Slave Transmission ..............................................................................................
14.5 Interrupt Sources ...............................................................................................................
481
481
483
485
493
496
497
497
498
500
502
504
505
505
506
506
507
508
508
509
509
510
511
511
512
515
518
519
522
524
524
527
527
529
533
536
540
Rev. 5.00 Aug 08, 2006 page lvii of lxxxvi
14.6 Usage Notes ......................................................................................................................
14.6.1 Setting Module Stop Mode ..................................................................................
14.6.2 TxRDY Flag and Underrun Error ........................................................................
14.6.3 RxRDY Flag and Overrun Error..........................................................................
14.6.4 Error Flag s in the IETEF.....................................................................................
14.6.5 Error Flags in IEREF ...........................................................................................
14.6.6 Notes on Slave Transmission...............................................................................
14.6.7 Notes on DTC Specification ................................................................................
14.6.8 Error Handling in Transmission...........................................................................
14.6.9 Power-Down Mode Operation .............................................................................
14.6.10 Notes on Middle-Speed Mode .............................................................................
14.6.11 Notes on Register Access.....................................................................................
541
541
541
542
542
543
544
545
545
546
546
546
Section 15 Serial Communication Interface (SCI) .................................................... 547
15.1 Features .............................................................................................................................
15.2 Input/Output Pins ..............................................................................................................
15.3 Register Descriptions ........................................................................................................
15.3.1 Receive Shift Register (RSR) ..............................................................................
15.3.2 Receive Data Register (RDR) ..............................................................................
15.3.3 Transmit Data Register (TDR).............................................................................
15.3.4 Transmit Shift Register (TSR) .............................................................................
15.3.5 Serial Mode Register (SMR)................................................................................
15.3.6 Serial Control Register (SCR)..............................................................................
15.3.7 Serial Status Register (SSR) ................................................................................
15.3.8 Smart Card Mode Register (SCMR) ....................................................................
15.3.9 Bit Rate Register (BRR) ......................................................................................
15.3.10 Serial Expansion Mode Register (SEMR_0) .......................................................
15.4 Operation in Asynchronous Mode ....................................................................................
15.4.1 Data Transfer Format...........................................................................................
15.4.2 Receive Data Sampling Timing and Reception Margin in Asynchronous Mode
15.4.3 Clock....................................................................................................................
15.4.4 SCI Initialization (Asynchronous Mode) .............................................................
15.4.5 Serial Data Transmission (Asynchronous Mode) ................................................
15.4.6 Serial Data Reception (Asynchronous Mode)......................................................
15.5 Multiprocessor Communication Function.........................................................................
15.5.1 Multiprocessor Serial Data Transmission ............................................................
15.5.2 Multiprocessor Serial Data Reception .................................................................
15.6 Operation in Clocked Synchronous Mode ........................................................................
15.6.1 Clock....................................................................................................................
15.6.2 SCI Initialization (Clocked Synchronous Mode) .................................................
Rev. 5.00 Aug 08, 2006 page lviii of lxxxvi
547
551
551
552
552
552
553
553
557
563
570
571
581
585
585
587
588
589
590
592
596
597
599
602
602
602
15.7
15.8
15.9
15.10
15.6.3 Serial Data Transmission (Clocked Synchronous Mode) ....................................
15.6.4 Serial Data Reception (Clocked Synchronous Mode)..........................................
15.6.5 Simultaneous Serial Data Transmission and Reception
(Clocked Synchronous Mode) .............................................................................
Operation in Smart Card Interface ....................................................................................
15.7.1 Pin Connection Example......................................................................................
15.7.2 Data Format (Except for Block Transfer Mode) ..................................................
15.7.3 Block Transfer Mode ...........................................................................................
15.7.4 Receive Data Sampling Timing and Reception Margin.......................................
15.7.5 Initialization .........................................................................................................
15.7.6 Serial Data Transmission (Except for Block Transfer Mode)..............................
15.7.7 Serial Data Reception (Except for Block Transfer Mode) ...................................
15.7.8 Clock Output Control...........................................................................................
SCI Select Function (H8S/2239 Group Only)...................................................................
Interrupt Sources ...............................................................................................................
15.9.1 Interrupts in Normal Serial Communication Interface Mode...............................
15.9.2 Interrupts in Smart Card Interface Mode .............................................................
Usage Notes ......................................................................................................................
15.10.1 Module Stop Mode Setting ..................................................................................
15.10.2 Break Detection and Processing (Asynchronous Mode Only).............................
15.10.3 Mark State and Break Detection (Asynchronous Mode Only).............................
15.10.4 Receive Error Flags and Transmit Operations
(Clocked Synchronous Mode Only).....................................................................
15.10.5 Restrictions on Use of DMAC or DTC................................................................
15.10.6 Operation in Case of Mode Transition.................................................................
15.10.7 Switching from SCK Pin Function to Port Pin Function .....................................
15.10.8 Assignment and Selection of Registers................................................................
603
606
608
610
610
610
612
612
613
614
617
618
620
622
622
624
625
625
625
625
625
626
626
630
631
Section 16 I2C Bus Interface (IIC) (Option) ................................................................ 633
16.1 Features .............................................................................................................................
16.2 Input/Output Pins ..............................................................................................................
16.3 Register Descriptions ........................................................................................................
16.3.1 I2C Bus Data Register (ICDR) .............................................................................
16.3.2 Slave Address Register (SAR) .............................................................................
16.3.3 Second Slave Address Register (SARX) .............................................................
16.3.4 I2C Bus Mode Register (ICMR)...........................................................................
16.3.5 Serial Control Register X (SCRX) .......................................................................
16.3.6 I2C Bus Control Register (ICCR).........................................................................
16.3.7 I2C Bus Status Register (ICSR)............................................................................
16.3.8 DDC Switch Register (DDCSWR) ......................................................................
633
636
636
637
639
639
640
643
644
649
653
Rev. 5.00 Aug 08, 2006 page lix of lxxxvi
16.4 Operation ..........................................................................................................................
16.4.1 I2C Bus Data Format............................................................................................
16.4.2 Initial Setting........................................................................................................
16.4.3 Master Transmit Operation ..................................................................................
16.4.4 Master Receive Operation....................................................................................
16.4.5 Slave Receive Operation......................................................................................
16.4.6 Slave Transmit Operation ....................................................................................
16.4.7 IRIC Setting Timing and SCL Control ................................................................
16.4.8 Operation Using the DTC ....................................................................................
16.4.9 Noise Canceler .....................................................................................................
16.4.10 Initialization of Internal State ..............................................................................
16.5 Interrupt Source ................................................................................................................
16.6 Usage Notes ......................................................................................................................
16.6.1 Module Stop Mode Setting ..................................................................................
653
653
655
655
659
664
669
672
673
674
674
676
676
687
Section 17 A/D Converter .................................................................................................
17.1 Features .............................................................................................................................
17.2 Input/Output Pins ..............................................................................................................
17.3 Register Descriptions ........................................................................................................
17.3.1 A/D Data Registers A to D (ADDRA to ADDRD) .............................................
17.3.2 A/D Control/Status Register (ADCSR) ...............................................................
17.3.3 A/D Control Register (ADCR) ............................................................................
17.4 Interface to Bus Master .....................................................................................................
17.5 Operation ..........................................................................................................................
17.5.1 Single Mode.........................................................................................................
17.5.2 Scan Mode ...........................................................................................................
17.5.3 Input Sampling and A/D Conversion Time .........................................................
17.5.4 External Trigger Input Timing.............................................................................
17.6 Interrupt Source ................................................................................................................
17.7 A/D Conversion Accuracy Definitions .............................................................................
17.8 Usage Notes ......................................................................................................................
17.8.1 Module Stop Mode Setting ..................................................................................
17.8.2 Permissible Signal Source Impedance .................................................................
17.8.3 Influences on Absolute Accuracy ........................................................................
17.8.4 Range of Analog Power Supply and Other Pin Settings ......................................
17.8.5 Notes on Board Design ........................................................................................
17.8.6 Notes on Noise Countermeasures ........................................................................
689
689
691
692
692
693
695
696
697
697
698
699
701
701
702
704
704
704
704
705
705
705
Section 18 D/A Converter ................................................................................................. 707
18.1 Features ............................................................................................................................. 707
Rev. 5.00 Aug 08, 2006 page lx of lxxxvi
18.2 Input/Output Pins ..............................................................................................................
18.3 Register Description..........................................................................................................
18.3.1 D/A Data Registers 0 and 1 (DADR0 and DADR1)............................................
18.3.2 D/A Control Register (DACR).............................................................................
18.4 Operation...........................................................................................................................
18.5 Usage Notes ......................................................................................................................
18.5.1 Analog Power Supply Current in Power-Down Mode.........................................
18.5.2 Setting for Module Stop Mode.............................................................................
708
708
708
709
710
711
711
711
Section 19 RAM .................................................................................................................. 713
Section 20 Flash Memory (F-ZTAT Version) ............................................................ 715
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
20.10
20.11
20.12
20.13
20.14
Features .............................................................................................................................
Mode Transitions ..............................................................................................................
Block Configuration..........................................................................................................
Input/Output Pins ..............................................................................................................
Register Descriptions ........................................................................................................
20.5.1 Flash Memory Control Register 1 (FLMCR1).....................................................
20.5.2 Flash Memory Control Register 2 (FLMCR2).....................................................
20.5.3 Erase Block Register 1 (EBR1) ...........................................................................
20.5.4 Erase Block Register 2 (EBR2) ...........................................................................
20.5.5 RAM Emulation Register (RAMER)...................................................................
20.5.6 Flash Memory Power Control Register (FLPWCR) ............................................
20.5.7 Serial Control Register X (SCRX) .......................................................................
On-Board Programming Modes ........................................................................................
20.6.1 Boot Mode ...........................................................................................................
20.6.2 Programming/Erasing in User Program Mode.....................................................
Flash Memory Emulation in RAM....................................................................................
Flash Memory Programming/Erasing ...............................................................................
20.8.1 Program/Program-Verify .....................................................................................
20.8.2 Erase/Erase-Verify ...............................................................................................
Program/Erase Protection..................................................................................................
20.9.1 Hardware Protection ............................................................................................
20.9.2 Software Protection..............................................................................................
20.9.3 Error Protection....................................................................................................
Interrupt Handling When Programming/Erasing Flash Memory ......................................
Programmer Mode ............................................................................................................
Power-Down States for Flash Memory .............................................................................
Flash Memory Programming and Erasing Precautions .....................................................
Note on Switching from F-ZTAT Version to Masked ROM Version...............................
715
716
720
724
724
725
726
726
728
729
731
731
732
732
735
735
737
738
740
742
742
742
742
743
743
745
745
751
Rev. 5.00 Aug 08, 2006 page lxi of lxxxvi
Section 21 Masked ROM .................................................................................................. 753
21.1 Features ............................................................................................................................. 753
Section 22 PROM ................................................................................................................
22.1 PROM Mode Setting.........................................................................................................
22.2 Socket Adapter and Memory Map ....................................................................................
22.3 Programming.....................................................................................................................
22.3.1 Programming and Verification.............................................................................
22.3.2 Programming Precautions ....................................................................................
22.3.3 Reliability of Programmed Data ..........................................................................
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755
759
759
763
764
Section 23 Clock Pulse Generator .................................................................................. 765
23.1 Register Descriptions ........................................................................................................
23.1.1 System Clock Control Register (SCKCR) ...........................................................
23.1.2 Low-Power Control Register (LPWRCR) ...........................................................
23.2 System Clock Oscillator....................................................................................................
23.2.1 Connecting a Crystal Resonator...........................................................................
23.2.2 External Clock Input ............................................................................................
23.2.3 Notes on Switching External Clock .....................................................................
23.3 Duty Adjustment Circuit...................................................................................................
23.4 Medium-Speed Clock Divider ..........................................................................................
23.5 Bus Master Clock Selection Circuit ..................................................................................
23.6 System Clock when Using IEBus .....................................................................................
23.7 Subclock Oscillator ...........................................................................................................
23.7.1 Connecting 32.768-kHz Crystal Resonator..........................................................
23.7.2 Handling Pins when Subclock Not Required.......................................................
23.8 Subclock Waveform Generation Circuit ...........................................................................
23.9 Usage Notes ......................................................................................................................
23.9.1 Note on Crystal Resonator ...................................................................................
23.9.2 Note on Board Design..........................................................................................
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771
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781
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Section 24 Power-Down Modes ......................................................................................
24.1 Register Description..........................................................................................................
24.1.1 Standby Control Register (SBYCR) ....................................................................
24.1.2 Module Stop Control Registers A to C (MSTPCRA to MSTPCRC)...................
24.2 Medium-Speed Mode........................................................................................................
24.3 Sleep Mode .......................................................................................................................
24.3.1 Transition to Sleep Mode.....................................................................................
24.3.2 Exiting Sleep Mode .............................................................................................
24.4 Software Standby Mode....................................................................................................
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24.5
24.6
24.7
24.8
24.9
24.10
24.11
24.12
24.4.1 Transition to Software Standby Mode .................................................................
24.4.2 Clearing Software Standby Mode ........................................................................
24.4.3 Oscillation Settling Time after Clearing Software Standby Mode.......................
24.4.4 Software Standby Mode Application Example ....................................................
Hardware Standby Mode...................................................................................................
24.5.1 Transition to Hardware Standby Mode ................................................................
24.5.2 Clearing Hardware Standby Mode.......................................................................
24.5.3 Hardware Standby Mode Timing.........................................................................
Module Stop Mode............................................................................................................
Watch Mode......................................................................................................................
24.7.1 Transition to Watch Mode ...................................................................................
24.7.2 Exiting Watch Mode ............................................................................................
Subsleep Mode..................................................................................................................
24.8.1 Transition to Subsleep Mode ...............................................................................
24.8.2 Exiting Subsleep Mode ........................................................................................
Subactive Mode.................................................................................................................
24.9.1 Transition to Subactive Mode ..............................................................................
24.9.2 Exiting Subactive Mode.......................................................................................
Direct Transitions..............................................................................................................
24.10.1 Direct Transitions from High-Speed Mode to Subactive Mode...........................
24.10.2 Direct Transitions from Subactive Mode to High-Speed Mode...........................
φ Clock Output Enable......................................................................................................
Usage Notes ......................................................................................................................
24.12.1 I/O Port Status......................................................................................................
24.12.2 Current Dissipation during Oscillation Settling Wait Period ...............................
24.12.3 DTC and DMAC Module Stop ............................................................................
24.12.4 On-Chip Peripheral Module Interrupt ..................................................................
24.12.5 Writing to MSTPCR ............................................................................................
24.12.6 Entering Subactive/Watch Mode and DMAC and DTC Module Stop ................
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799
799
799
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800
801
801
801
801
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802
802
Section 25 Power Supply Circuit .................................................................................... 803
25.1 Overview...........................................................................................................................
25.2 Power Supply Connection for H8S/2258 Group, H8S/2238B, and H8S/2236B
(On-Chip Internal Power Supply Step-Down Circuit) ......................................................
25.3 Power Supply Connection for H8S/2239 Group, H8S/2238R, H8S/2236R, H8S/2237
Group, and H8S/2227 Group (No Internal Power Supply Step-Down Circuit) ................
25.4 Note on Bypass Capacitor .................................................................................................
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803
804
805
Section 26 List of Registers .............................................................................................. 807
26.1 Register Addresses (In Address Order)............................................................................. 807
Rev. 5.00 Aug 08, 2006 page lxiii of lxxxvi
26.2 Register Bits...................................................................................................................... 818
26.3 Register States in Each Operating Mode........................................................................... 830
Section 27 Electrical Characteristics..............................................................................
27.1 Power Supply Voltage and Operating Frequency Range ..................................................
27.2 Electrical Characteristics of H8S/2258 Group ..................................................................
27.2.1 Absolute Maximum Ratings ................................................................................
27.2.2 DC Characteristics ...............................................................................................
27.2.3 AC Characteristics ...............................................................................................
27.2.4 A/D Conversion Characteristics...........................................................................
27.2.5 D/A Conversion Characteristics...........................................................................
27.2.6 Flash Memory Characteristics .............................................................................
27.3 Electrical Characteristics of H8S/2239 Group ..................................................................
27.3.1 Absolute Maximum Ratings ................................................................................
27.3.2 DC Characteristics ...............................................................................................
27.3.3 AC Characteristics ...............................................................................................
27.3.4 A/D Conversion Characteristics...........................................................................
27.3.5 D/A Conversion Characteristics...........................................................................
27.3.6 Flash Memory Characteristics .............................................................................
27.4 Electrical Characteristics of H8S/2238B and H8S/2236B ................................................
27.4.1 Absolute Maximum Ratings ................................................................................
27.4.2 DC Characteristics ...............................................................................................
27.4.3 AC Characteristics ...............................................................................................
27.4.4 A/D Conversion Characteristics...........................................................................
27.4.5 D/A Conversion Characteristics...........................................................................
27.4.6 Flash Memory Characteristics .............................................................................
27.5 Electrical Characteristics of H8S/2238R and H8S/2236R ................................................
27.5.1 Absolute Maximum Ratings ................................................................................
27.5.2 DC Characteristics ...............................................................................................
27.5.3 AC Characteristics ...............................................................................................
27.5.4 A/D Conversion Characteristics...........................................................................
27.5.5 D/A Conversion Characteristics...........................................................................
27.5.6 Flash Memory Characteristics .............................................................................
27.6 Electrical Characteristics of H8S/2237 Group and H8S/2227 Group ...............................
27.6.1 Absolute Maximum Ratings ................................................................................
27.6.2 DC Characteristics ...............................................................................................
27.6.3 AC Characteristics ...............................................................................................
27.6.4 A/D Conversion Characteristics...........................................................................
27.6.5 D/A Conversion Characteristics...........................................................................
27.6.6 Flash Memory Characteristics .............................................................................
Rev. 5.00 Aug 08, 2006 page lxiv of lxxxvi
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27.7 Operating Timing ..............................................................................................................
27.7.1 Clock Timing .......................................................................................................
27.7.2 Control Signal Timing .........................................................................................
27.7.3 Bus Timing...........................................................................................................
27.7.4 Timing of On-Chip Peripheral Modules ..............................................................
27.8 Usage Note........................................................................................................................
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Appendix A I/O Port States in Each Pin State ............................................................ 963
A.1
I/O Port State in Each Pin State ........................................................................................ 963
Appendix B Product Codes............................................................................................... 968
Appendix C Package Dimensions................................................................................... 973
Index
............................................................................................................................. 979
Rev. 5.00 Aug 08, 2006 page lxv of lxxxvi
Figures
Section 1 Overview
Figure 1.1 Internal Block Diagram of H8S/2258 Group .........................................................
Figure 1.2 Internal Block Diagram of H8S/2239 Group .........................................................
Figure 1.3 Internal Block Diagram of H8S/2238 Group .........................................................
Figure 1.4 Internal Block Diagram of H8S/2237 Group .........................................................
Figure 1.5 Internal Block Diagram of H8S/2227 Group .........................................................
Figure 1.6 Pin Arrangement of H8S/2258 Group (TFP-100B, TFP-100BV, FP-100B,
FP-100BV: Top View) ...........................................................................................
Figure 1.7 Pin Arrangement of H8S/2258 Group (FP-100A, FP-100AV: Top View) ............
Figure 1.8 Pin Arrangement of H8S/2239 Group (TFP-100B, TFP-100BV, TFP-100G,
TFP-100GV, FP-100B, FP-100BV: Top View) .....................................................
Figure 1.9 Pin Arrangement of H8S/2239 Group (TBP-112A, TBP-112AV: Top View,
Only for HD64F2239)............................................................................................
Figure 1.10 Pin Arrangement of H8S/2238 Group (TFP-100B, TFP-100BV, TFP-100G,
TFP-100GV, FP-100B, FP-100BV: Top View) .....................................................
Figure 1.11 Pin Arrangement of H8S/2238 Group (FP-100A, FP-100AV: Top View,
Only for H8S/2238B and H8S/2236B) ..................................................................
Figure 1.12 Pin Arrangement of H8S/2238 Group (BP-112, BP-112V, TBP-112A,
TBP-112AV: Top View, Only for HD64F2238R) .................................................
Figure 1.13 Pin Arrangement of H8S/2237 Group (TFP-100B, TFP-100BV, TFP-100G,
TFP-100GV, FP-100B, FP-100BV: Top View) .....................................................
Figure 1.14 Pin Arrangement of H8S/2237 Group (FP-100A, FP-100AV: Top View) ............
Figure 1.15 Pin Arrangement of H8S/2227 Group (TFP-100B, TFP-100BV, TFP-100G,
TFP-100GV, FP-100B, FP-100BV: Top View) .....................................................
Figure 1.16 Pin Arrangement of H8S/2227 Group (FP-100A, FP-100AV: Top View,
Only for HD6432227) ............................................................................................
Section 2 CPU
Figure 2.1 Exception Vector Table (Normal Mode)................................................................
Figure 2.2 Stack Structure in Normal Mode............................................................................
Figure 2.3 Exception Vector Table (Advanced Mode)............................................................
Figure 2.4 Stack Structure in Advanced Mode........................................................................
Figure 2.5 Memory Map..........................................................................................................
Figure 2.6 CPU Registers ........................................................................................................
Figure 2.7 Usage of General Registers ....................................................................................
Figure 2.8 Stack Status ............................................................................................................
Figure 2.9 General Register Data Formats (1).........................................................................
Rev. 5.00 Aug 08, 2006 page lxvi of lxxxvi
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Figure 2.9
Figure 2.10
Figure 2.11
Figure 2.12
Figure 2.13
Figure 2.14
General Register Data Formats (2).........................................................................
Memory Data Formats............................................................................................
Instruction Formats (Examples) .............................................................................
Branch Address Specification in Memory Indirect Mode ......................................
State Transitions .....................................................................................................
Flowchart for Access Methods for Registers That Include Write-Only Bits..........
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Section 3 MCU Operating Modes
Figure 3.1 H8S/2258 Memory Map in Each Operating Mode.................................................
Figure 3.2 H8S/2256 Memory Map in Each Operating Mode.................................................
Figure 3.3 H8S/2239 Memory Map in Each Operating Mode.................................................
Figure 3.4 H8S/2238B and H8S/2238R Memory Map in Each Operating Mode ...................
Figure 3.5 H8S/2236B and H8S/2236R Memory Map in Each Operating Mode ...................
Figure 3.6 H8S/2237 and H8S/2227 Memory Map in Each Operating Mode.........................
Figure 3.7 H8S/2235 and H8S/2225 Memory Map in Each Operating Mode.........................
Figure 3.8 H8S/2224 Memory Map in Each Operating Mode.................................................
Figure 3.9 H8S/2233 and H8S/2223 Memory Map in Each Operating Mode.........................
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Section 4 Exception Handling
Figure 4.1 Reset Sequence (Mode 4)....................................................................................... 122
Figure 4.2 Stack Status after Exception Handling (Advanced Mode) ..................................... 125
Figure 4.3 Operation When SP Value Is Odd.......................................................................... 126
Section 5 Interrupt Controller
Figure 5.1 Block Diagram of Interrupt Controller ...................................................................
Figure 5.2 Block Diagram of IRQn Interrupts.........................................................................
Figure 5.3 Set Timing for IRQnF ............................................................................................
Figure 5.4 Block Diagram of Interrupt Control Operation ......................................................
Figure 5.5 Flowchart of Procedure Up to Interrupt Acceptance in Interrupt Control Mode 0.
Figure 5.6 Flowchart of Procedure Up to Interrupt Acceptance in Control Mode 2 ...............
Figure 5.7 Interrupt Exception Handling .................................................................................
Figure 5.8 DTC and DMAC Interrupt Control ........................................................................
Figure 5.9 Contention between Interrupt Generation and Disabling .......................................
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146
148
149
152
155
Section 6 PC Break Controller (PBC)
Figure 6.1 Block Diagram of PC Break Controller ................................................................. 158
Figure 6.2 Operation in Power-Down Mode Transitions......................................................... 162
Section 7 Bus Controller
Figure 7.1 Block Diagram of Bus Controller........................................................................... 166
Rev. 5.00 Aug 08, 2006 page lxvii of lxxxvi
Figure 7.2
Figure 7.3
Figure 7.4
Figure 7.5
Figure 7.6
Figure 7.7
Figure 7.8
Figure 7.9
Figure 7.10
Figure 7.11
Figure 7.12
Figure 7.13
Figure 7.14
Figure 7.15
Figure 7.16
Figure 7.17
Figure 7.18
Figure 7.19
Figure 7.20
Figure 7.21
Figure 7.22
Figure 7.23
Figure 7.24
Overview of Area Divisions...................................................................................
CSn Signal Output Timing (n = 0 to 7) ..................................................................
On-5Chip Memory Access Cycle...........................................................................
Pin States during On-Chip Memory Access...........................................................
On-Chip Peripheral Module Access Cycle.............................................................
Pin States during On-Chip Peripheral Module Access...........................................
Access Sizes and Data Alignment Control (8-Bit Access Space) ..........................
Access Sizes and Data Alignment Control (16-Bit Access Space) ........................
Bus Timing for 8-Bit 2-State Access Space ...........................................................
Bus Timing for 8-Bit 3-State Access Space ...........................................................
Bus Timing for 16-Bit 2-State Access Space (1) (Even Address Byte Access) .....
Bus Timing for 16-Bit 2-State Access Space (2) (Odd Address Byte Access) ......
Bus Timing for 16-Bit 2-State Access Space (3) (Word Access)...........................
Bus Timing for 16-Bit 3-State Access Space (1) (Even Address Byte Access) .....
Bus Timing for 16-Bit 3-State Access Space (2) (Odd Address Byte Access) ......
Bus Timing for 16-Bit 3-State Access Space (3) (Word Access)...........................
Example of Wait State Insertion Timing................................................................
Example of Burst ROM Access Timing (When AST0 = BRSTS1 = 1).................
Example of Burst ROM Access Timing (When AST0 = BRSTS1 = 0).................
Example of Idle Cycle Operation (1) .....................................................................
Example of Idle Cycle Operation (2) .....................................................................
Relationship between Chip Select (CS) and Read (RD) ........................................
Bus-Released State Transition Timing ...................................................................
Section 8 DMA Controller (DMAC)
Figure 8.1 Block Diagram of DMAC ......................................................................................
Figure 8.2 Areas for Register Re-Setting by DTC (Channel 0A) ............................................
Figure 8.3 Operation in Sequential Mode................................................................................
Figure 8.4 Example of Sequential Mode Setting Procedure....................................................
Figure 8.5 Operation in Idle Mode ..........................................................................................
Figure 8.6 Example of Idle Mode Setting Procedure ..............................................................
Figure 8.7 Operation in Repeat mode......................................................................................
Figure 8.8 Example of Repeat Mode Setting Procedure..........................................................
Figure 8.9 Data Bus in Single Address Mode..........................................................................
Figure 8.10 Operation in Single Address Mode (when Sequential Mode Is Specified) ............
Figure 8.11 Example of Single Address Mode Setting Procedure (when Sequential Mode
Is Specified) ...........................................................................................................
Figure 8.12 Operation in Normal Mode ....................................................................................
Figure 8.13 Example of Normal Mode Setting Procedure.........................................................
Figure 8.14 Operation in Block Transfer Mode (BLKDIR = 0) ................................................
Rev. 5.00 Aug 08, 2006 page lxviii of lxxxvi
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Figure 8.15
Figure 8.16
Figure 8.17
Figure 8.18
Figure 8.19
Figure 8.20
Figure 8.21
Figure 8.22
Figure 8.23
Figure 8.24
Figure 8.25
Figure 8.26
Figure 8.27
Figure 8.28
Figure 8.29
Figure 8.30
Figure 8.31
Figure 8.32
Figure 8.33
Figure 8.34
Figure 8.35
Figure 8.36
Figure 8.37
Figure 8.38
Figure 8.39
Operation in Block Transfer Mode (BLKDIR = 1) ................................................
Operation Flow in Block Transfer Mode ...............................................................
Example of Block Transfer Mode Setting Procedure.............................................
Example of DMA Transfer Bus Timing.................................................................
Example of Short Address Mode Transfer .............................................................
Example of Full Address Mode Transfer (Cycle Steal) .........................................
Example of Full Address Mode Transfer (Burst Mode).........................................
Example of Full Address Mode Transfer (Block Transfer Mode) .........................
Example of DREQ Pin Falling Edge Activated Normal Mode Transfer................
Example of DREQ Pin Falling Edge Activated Block Transfer Mode Transfer....
Example of DREQ Pin Low Level Activated Normal Mode Transfer...................
Example of DREQ Pin Low Level Activated Block Transfer Mode Transfer .......
Example of Single Address Mode Transfer (Byte Read) .......................................
Example of Single Address Mode (Word Read) Transfer......................................
Example of Single Address Mode Transfer (Byte Write) ......................................
Example of Single Address Mode Transfer (Word Write).....................................
Example of DREQ Pin Falling Edge Activated Single Address Mode Transfer....
Example of DREQ Pin Low Level Activated Single Address Mode Transfer.......
Example of Multi-Channel Transfer.......................................................................
Example of Procedure for Continuing Transfer on Channel Interrupted by NMI
Interrupt..................................................................................................................
Example of Procedure for Forcibly Terminating DMAC Operation......................
Example of Procedure for Clearing Full Address Mode ........................................
Block Diagram of Transfer End/Transfer Break Interrupt .....................................
DMAC Register Update Timing.............................................................................
Contention between DMAC Register Update and CPU Read................................
Section 9 Data Transfer Controller (DTC)
Figure 9.1 Block Diagram of DTC ..........................................................................................
Figure 9.2 Block Diagram of DTC Activation Source Control ...............................................
Figure 9.3 The Location of the DTC Register Information in the Address Space...................
Figure 9.4 Correspondence between DTC Vector Address and Register Information ............
Figure 9.5 Flowchart of DTC Operation..................................................................................
Figure 9.6 Memory Mapping in Normal Mode .......................................................................
Figure 9.7 Memory Mapping in Repeat Mode ........................................................................
Figure 9.8 Memory Mapping in Block Transfer Mode ...........................................................
Figure 9.9 Chain Transfer Operation .......................................................................................
Figure 9.10 DTC Operation Timing (Example in Normal Mode or Repeat Mode) ..................
Figure 9.11 DTC Operation Timing (Example of Block Transfer Mode, with Block
Size of 2) ................................................................................................................
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Rev. 5.00 Aug 08, 2006 page lxix of lxxxvi
Figure 9.12 DTC Operation Timing (Example of Chain Transfer) ........................................... 300
Section 10 I/O Ports
Figure 10.1 Types of Open Drain Outputs ................................................................................ 318
Section 11 16-Bit Timer Pulse Unit (TPU)
Figure 11.1 Block Diagram of TPU (H8S/2258 Group, H8S/2239 Group, H8S/2238 Group,
and H8S/2237 Group) ............................................................................................
Figure 11.2 Block Diagram of TPU (H8S/2227 Group)............................................................
Figure 11.3 Example of Counter Operation Setting Procedure .................................................
Figure 11.4 Free-Running Counter Operation ...........................................................................
Figure 11.5 Periodic Counter Operation....................................................................................
Figure 11.6 Example of Setting Procedure for Waveform Output by Compare Match.............
Figure 11.7 Example of 0 Output/1 Output Operation ..............................................................
Figure 11.8 Example of Toggle Output Operation ....................................................................
Figure 11.9 Example of Setting Procedure for Input Capture Operation...................................
Figure 11.10 Example of Input Capture Operation .....................................................................
Figure 11.11 Example of Synchronous Operation Setting Procedure .........................................
Figure 11.12 Example of Synchronous Operation.......................................................................
Figure 11.13 Compare Match Buffer Operation..........................................................................
Figure 11.14 Input Capture Buffer Operation..............................................................................
Figure 11.15 Example of Buffer Operation Setting Procedure....................................................
Figure 11.16 Example of Buffer Operation (1) ...........................................................................
Figure 11.17 Example of Buffer Operation (2) ...........................................................................
Figure 11.18 Cascaded Operation Setting Procedure ..................................................................
Figure 11.19 Example of Cascaded Operation (1).......................................................................
Figure 11.20 Example of Cascaded Operation (2).......................................................................
Figure 11.21 Example of PWM Mode Setting Procedure ...........................................................
Figure 11.22 Example of PWM Mode Operation (1) ..................................................................
Figure 11.23 Example of PWM Mode Operation (2) ..................................................................
Figure 11.24 Example of PWM Mode Operation (3) ..................................................................
Figure 11.25 Example of Phase Counting Mode Setting Procedure............................................
Figure 11.26 Example of Phase Counting Mode 1 Operation .....................................................
Figure 11.27 Example of Phase Counting Mode 2 Operation .....................................................
Figure 11.28 Example of Phase Counting Mode 3 Operation .....................................................
Figure 11.29 Example of Phase Counting Mode 4 Operation .....................................................
Figure 11.30 Phase Counting Mode Application Example..........................................................
Figure 11.31 Count Timing in Internal Clock Operation.............................................................
Figure 11.32 Count Timing in External Clock Operation ...........................................................
Figure 11.33 Output Compare Output Timing ............................................................................
Rev. 5.00 Aug 08, 2006 page lxx of lxxxvi
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Figure 11.34 Input Capture Input Signal Timing.........................................................................
Figure 11.35 Counter Clear Timing (Compare Match) ...............................................................
Figure 11.36 Counter Clear Timing (Input Capture) ...................................................................
Figure 11.37 Buffer Operation Timing (Compare Match)...........................................................
Figure 11.38 Buffer Operation Timing (Input Capture) ..............................................................
Figure 11.39 TGI Interrupt Timing (Compare Match) ................................................................
Figure 11.40 TGI Interrupt Timing (Input Capture) ....................................................................
Figure 11.41 TCIV Interrupt Setting Timing...............................................................................
Figure 11.42 TCIU Interrupt Setting Timing...............................................................................
Figure 11.43 Timing for Status Flag Clearing by CPU ...............................................................
Figure 11.44 Timing for Status Flag Clearing by DTC/DMAC Activation ................................
Figure 11.45 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode .................
Figure 11.46 Contention between TCNT Write and Clear Operations........................................
Figure 11.47 Contention between TCNT Write and Increment Operations ................................
Figure 11.48 Contention between TGR Write and Compare Match............................................
Figure 11.49 Contention between Buffer Register Write and Compare Match...........................
Figure 11.50 Contention between TGR Read and Input Capture ................................................
Figure 11.51 Contention between TGR Write and Input Capture ...............................................
Figure 11.52 Contention between Buffer Register Write and Input Capture...............................
Figure 11.53 Contention between Overflow and Counter Clearing.............................................
Figure 11.54 Contention between TCNT Write and Overflow....................................................
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Section 12 8-Bit Timers
Figure 12.1 Block Diagram of 8-Bit Timer Module..................................................................
Figure 12.2 Example of Pulse Output........................................................................................
Figure 12.3 Count Timing for Internal Clock Input...................................................................
Figure 12.4 Count Timing for External Clock Input .................................................................
Figure 12.5 Timing of CMF Setting ..........................................................................................
Figure 12.6 Timing of Timer Output .........................................................................................
Figure 12.7 Timing of Compare-Match Clear ...........................................................................
Figure 12.8 Timing of Clearing by External Reset Input...........................................................
Figure 12.9 Timing of OVF Setting...........................................................................................
Figure 12.10 Contention between TCNT Write and Clear ..........................................................
Figure 12.11 Contention between TCNT Write and Increment...................................................
Figure 12.12 Contention between TCOR Write and Compare-Match.........................................
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460
Section 13
Figure 13.1
Figure 13.1
Figure 13.2
Watchdog Timer (WDT)
Block Diagram of WDT_0 (1) ............................................................................... 466
Block Diagram of WDT_1 (2) ............................................................................... 467
Watchdog Timer Mode Operation.......................................................................... 474
Rev. 5.00 Aug 08, 2006 page lxxi of lxxxvi
Figure 13.3
Figure 13.4
Figure 13.5
Figure 13.6
Figure 13.7
Figure 13.8
Interval Timer Mode Operation .............................................................................
Timing of OVF Setting...........................................................................................
Timing of WOVF Setting.......................................................................................
Writing to TCNT, TCSR ........................................................................................
Writing to RSTCSR ...............................................................................................
Contention between TCNT Write and Increment...................................................
IEBus
 Controller (IEB) [H8S/2258 Group]
Block Diagram of IEB............................................................................................
Transfer Signal Format...........................................................................................
Bit Configuration of Slave Status (SSR) ................................................................
Locked Address Configuration...............................................................................
IEBus Bit Format (Conceptual Diagram)...............................................................
Transmission Signal Format and Registers in Data Transfer .................................
Relationship between Transmission Signal Format and Registers in IEBus
Data Reception .......................................................................................................
Figure 14.8 Master Transmit Operation Timing........................................................................
Figure 14.9 Slave Reception Operation Timing ........................................................................
Figure 14.10 Error Occurrence in the Broadcast Reception (DEE = 1).......................................
Figure 14.11 Master Receive Operation Timing .........................................................................
Figure 14.12 Slave Transmit Operation Timing ..........................................................................
Figure 14.13 Relationships among Transfer Interrupt Sources ...................................................
Figure 14.14 Relationships among Receive Interrupt Sources ....................................................
Figure 14.15 Error Processing in Transfer...................................................................................
Section 14
Figure 14.1
Figure 14.2
Figure 14.3
Figure 14.4
Figure 14.5
Figure 14.6
Figure 14.7
Section 15
Figure 15.1
Figure 15.2
Figure 15.3
Figure 15.4
Figure 15.5
Figure 15.6
Figure 15.7
Figure 15.8
Figure 15.9
Serial Communication Interface (SCI)
Block Diagram of SCI............................................................................................
Block Diagram of SCI_0 of H8S/2239 Group .......................................................
Example of the Internal Base Clock When the Average Transfer Rate
Is Selected (1).........................................................................................................
Example of the Internal Base Clock When the Average Transfer Rate
Is Selected (2).........................................................................................................
Data Format in Asynchronous Communication (Example with 8-Bit Data,
Parity, Two Stop Bits) ............................................................................................
Receive Data Sampling Timing in Asynchronous Mode .......................................
Relationship between Output Clock and Transfer Data Phase
(Asynchronous Mode)............................................................................................
Sample SCI Initialization Flowchart ......................................................................
Example of Operation in Transmission in Asynchronous Mode (Example with
8-Bit Data, Parity, One Stop Bit) ...........................................................................
Rev. 5.00 Aug 08, 2006 page lxxii of lxxxvi
475
475
476
477
478
478
482
486
494
495
496
507
510
529
532
533
536
539
540
540
545
549
550
583
584
585
588
588
589
590
Figure 15.10 Sample Serial Transmission Flowchart .................................................................. 591
Figure 15.11 Example of SCI Operation in Reception (Example with 8-Bit Data, Parity, One Stop
Bit)
592
Figure 15.12 Sample Serial Reception Data Flowchart (1) ......................................................... 594
Figure 15.12 Sample Serial Reception Data Flowchart (2) ......................................................... 595
Figure 15.13 Example of Communication Using Multiprocessor Format (Transmission of
Data H'AA to Receiving Station A) ....................................................................... 597
Figure 15.14 Sample Multiprocessor Serial Transmission Flowchart ......................................... 598
Figure 15.15 Example of SCI Operation in Reception (Example with 8-Bit Data,
Multiprocessor Bit, One Stop Bit).......................................................................... 599
Figure 15.16 Sample Multiprocessor Serial Reception Flowchart (1)......................................... 600
Figure 15.16 Sample Multiprocessor Serial Reception Flowchart (2)......................................... 601
Figure 15.17 Data Format in Synchronous Communication (For LSB-First) ............................. 602
Figure 15.18 Sample SCI Initialization Flowchart ...................................................................... 603
Figure 15.19 Sample SCI Transmission Operation in Clocked Synchronous Mode ................... 604
Figure 15.20 Sample Serial Transmission Flowchart .................................................................. 605
Figure 15.21 Example of SCI Operation in Reception ................................................................ 606
Figure 15.22 Sample Serial Reception Flowchart ....................................................................... 607
Figure 15.23 Sample Flowchart of Simultaneous Serial Transmit and Receive Operations ....... 609
Figure 15.24 Schematic Diagram of Smart Card Interface Pin Connections............................... 610
Figure 15.25 Normal Smart Card Interface Data Format ............................................................ 611
Figure 15.26 Direct Convention (SDIR = SINV = O/E = 0) ....................................................... 611
Figure 15.27 Inverse Convention (SDIR = SINV = O/E = 1)...................................................... 611
Figure 15.28 Receive Data Sampling Timing in Smart Card Mode (Using Clock of
372 Times the Transfer Rate) ................................................................................. 613
Figure 15.29 Retransfer Operation in SCI Transmit Mode.......................................................... 615
Figure 15.30 TEND Flag Generation Timing in Transmission Operation................................... 615
Figure 15.31 Example of Transmission Processing Flow............................................................ 616
Figure 15.32 Retransfer Operation in SCI Receive Mode ........................................................... 617
Figure 15.33 Example of Reception Processing Flow................................................................. 618
Figure 15.34 Timing for Fixing Clock Output Level................................................................... 618
Figure 15.35 Clock Halt and Restart Procedure .......................................................................... 619
Figure 15.36 Example of Communication Using SCI Select Function ....................................... 620
Figure 15.37 Summary of SCI Select Function Operation .......................................................... 621
Figure 15.38 Example of Clocked Synchronous Transmission by DMAC or DTC.................... 626
Figure 15.39 Sample Flowchart for Mode Transition during Transmission................................ 627
Figure 15.40 Asynchronous Transmission Using Internal Clock ................................................ 628
Figure 15.41 Synchronous Transmission Using Internal Clock .................................................. 628
Figure 15.42 Sample Flowchart for Mode Transition during Reception ..................................... 629
Figure 15.43 Operation when Switching from SCK Pin Function to Port Pin Function ............. 630
Rev. 5.00 Aug 08, 2006 page lxxiii of lxxxvi
Figure 15.44 Operation when Switching from SCK Pin Function to Port Pin Function
(Example of Preventing Low-Level Output).......................................................... 631
Section 16
Figure 16.1
Figure 16.2
Figure 16.3
Figure 16.4
Figure 16.5
Figure 16.6
Figure 16.7
Figure 16.8
Figure 16.9
I2C Bus Interface (IIC) (Option)
Block Diagram of I2C Bus Interface.......................................................................
I2C Bus Interface Connections (Example: This LSI as Master) .............................
I2C Bus Data Formats (I2C Bus Formats)...............................................................
I2C Bus Data Format (Serial Format) .....................................................................
I2C Bus Timing.......................................................................................................
Flowchart for IIC Initialization (Example).............................................................
Flowchart for Master Transmit Mode (Example)...................................................
Example of Master Transmit Mode Operation Timing (MLS = WAIT = 0) .........
Example of Master Transmit Mode Stop Condition Generation Timing
(MLS = WAIT = 0) ................................................................................................
Figure 16.10 Flowchart for Master Receive Mode (Receiving Multiple Bytes) (WAIT = 1)
(Example) ......................................................................................................................
Figure 16.11 Flowchart for Master Receive Mode (Receiving 1 Byte) (WAIT = 1) (Example)
Figure 16.12 Example of Master Receive Mode Operation Timing (MLS = ACKB = 0,
WAIT = 1)..............................................................................................................
Figure 16.13 Example of Master Receive Mode Stop Condition Generation Timing
(MLS = ACKB = 0, WAIT = 1).............................................................................
Figure 16.14 Flowchart for Slave Transmit Mode (Example).....................................................
Figure 16.15 Example of Slave Receive Mode Operation Timing (1) (MLS = ACKB = 0) .......
Figure 16.16 Example of Slave Receive Mode Operation Timing (2) (MLS = ACKB = 0) .......
Figure 16.17 Sample Flowchart for Slave Transmit Mode..........................................................
Figure 16.18 Example of Slave Transmit Mode Operation Timing (MLS = 0) ..........................
Figure 16.19 IRIC Setting Timing and SCL Control...................................................................
Figure 16.20 Block Diagram of Noise Canceler..........................................................................
Figure 16.21 Points for Attention Concerning Reading of Master Receive Data........................
Figure 16.22 Flowchart and Timing of Start Condition Instruction Issuance for
Retransmission .......................................................................................................
Figure 16.23 Timing of Stop Condition Issuance........................................................................
Figure 16.24 IRIC Flag Clearance in WAIT = 1 Status ..............................................................
Figure 16.25 ICDR Read and ICCR Access Timing in Slave Transmit Mode............................
Figure 16.26 TRS Bit Setting Timing in Slave Mode .................................................................
Figure 16.27 Diagram of Erroneous Operation Wen Arbitration Is Lost ....................................
Figure 16.28 IRIC Flag Clearing Timing in Wait Operation.......................................................
635
636
654
654
654
655
656
658
658
660
661
663
664
665
667
668
669
671
672
674
680
681
682
682
683
684
686
687
Section 17 A/D Converter
Figure 17.1 Block Diagram of A/D Converter .......................................................................... 690
Rev. 5.00 Aug 08, 2006 page lxxiv of lxxxvi
Figure 17.2 Access to ADDR (When Reading H'AA40)...........................................................
Figure 17.3 Example of A/D converter Operation (Single Mode, Channel 1 Selected) ............
Figure 17.4 Example of A/D Converter Operation (Scan Mode, Channels AN0 to
AN2 Selected) ........................................................................................................
Figure 17.5 A/D Conversion Timing .........................................................................................
Figure 17.6 External Trigger Input Timing ...............................................................................
Figure 17.7 A/D Conversion Accuracy Definitions...................................................................
Figure 17.8 A/D Conversion Accuracy Definitions...................................................................
Figure 17.9 Example of Analog Input Circuit ...........................................................................
Figure 17.10 Example of Analog Input Protection Circuit ..........................................................
Figure 17.11 Analog Input Pin Equivalent Circuit ......................................................................
696
698
699
700
701
703
703
704
706
706
Section 18 D/A Converter
Figure 18.1 Block Diagram of D/A Converter .......................................................................... 707
Figure 18.2 D/A Converter Operation Example ........................................................................ 710
Section 20 Flash Memory (F-ZTAT Version)
Figure 20.1 Block Diagram of Flash Memory...........................................................................
Figure 20.2 Flash Memory State Transitions.............................................................................
Figure 20.3 Boot Mode (Example) ............................................................................................
Figure 20.4 User Program Mode (Example)..............................................................................
Figure 20.5 Block Configuration of 384-kbyte Flash Memory .................................................
Figure 20.6 Block Configuration of 256-kbyte Flash Memory .................................................
Figure 20.7 Block Configuration of 128-kbyte Flash Memory .................................................
Figure 20.8 Programming/Erasing Flowchart Example in User Program Mode .......................
Figure 20.9 Flowchart for Flash Memory Emulation in RAM ..................................................
Figure 20.10 Example of RAM Overlap Operation.....................................................................
Figure 20.11 Program/Program-Verify Flowchart.......................................................................
Figure 20.12 Erase/Erase-Verify Flowchart ................................................................................
Figure 20.13 Socket Adapter Pin Correspondence Diagram .......................................................
Figure 20.14 Power-On/Off Timing (Boot Mode) ......................................................................
Figure 20.15 Power-On/Off Timing (User Program Mode) ........................................................
Figure 20.16 Mode Transition Timing (Example: Boot Mode → User Mode ↔ User Program
Mode) .....................................................................................................................
716
717
718
719
721
722
723
735
736
737
739
741
744
748
749
750
Section 21 Masked ROM
Figure 21.1 Block Diagram of On-Chip Masked ROM (384 kbytes)....................................... 754
Rev. 5.00 Aug 08, 2006 page lxxv of lxxxvi
Section 22 PROM
Figure 22.1 HD6472237 Socket Adapter Pin Correspondence Diagram (FP-100B,
TFP-100B, TFP-100G)...........................................................................................
Figure 22.2 HD6472237 Socket Adapter Pin Correspondence Diagram (FP-100A) ................
Figure 22.3 Memory Map in PROM Mode ...............................................................................
Figure 22.4 High-Speed Programming Flowchart.....................................................................
Figure 22.5 PROM Programming/Verification Timing.............................................................
Figure 22.6 Recommended Screening Procedure......................................................................
756
757
758
760
763
764
Section 23 Clock Pulse Generator
Figure 23.1 Block Diagram of Clock Pulse Generator ..............................................................
Figure 23.2 Connection of Crystal Resonator (Example)..........................................................
Figure 23.3 Crystal Resonator Equivalent Circuit.....................................................................
Figure 23.4 External Clock Input (Examples) ...........................................................................
Figure 23.5 External Clock Input Timing..................................................................................
Figure 23.6 External Clock Switching Circuit (Example) .........................................................
Figure 23.7 External Clock Switching Timing (Example) ........................................................
Figure 23.8 Connection Example of 32.768-kHz Quartz Oscillator..........................................
Figure 23.9 Equivalence Circuit for 32.768-kHz Oscillator ......................................................
Figure 23.10 Pin Handling when Subclock Not Required...........................................................
Figure 23.11 Note on Board Design of Oscillator Circuit ...........................................................
765
770
771
772
777
778
778
780
780
781
782
Section 24
Figure 24.1
Figure 24.2
Figure 24.3
Figure 24.4
785
791
794
796
Power-Down Modes
Mode Transition Diagram ......................................................................................
Medium-Speed Mode Transition and Clearance Timing .......................................
Software Standby Mode Application Example ......................................................
Hardware Standby Mode Timing ...........................................................................
Section 25 Power Supply Circuit
Figure 25.1 Power Supply Connection for H8S/2258 Group, H8S/2238B, and H8S/2236B
(On-Chip Internal Power Supply Step-Down Circuit) ........................................... 804
Figure 25.2 Power Supply Connection for H8S/2239 Group, H8S/2238R, H8S/2236R,
H8S/2237 Group, and H8S/2227 Group (No Internal Power Supply Step-Down
Circuit) ................................................................................................................... 804
Section 27
Figure 27.1
Figure 27.2
Figure 27.3
Electrical Characteristics
Power Supply Voltage and Operating Ranges (H8S/2258 Group)......................... 839
Power Supply Voltage and Operating Ranges (H8S/2239 Group)......................... 840
Power Supply Voltage and Operating Ranges (H8S/2238B and H8S/2236B)....... 841
Rev. 5.00 Aug 08, 2006 page lxxvi of lxxxvi
Figure 27.4 Power Supply Voltage and Operating Ranges (H8S/2238R and H8S/2236R).......
Figure 27.5 Power Supply Voltage and Operating Ranges (H8S/2237 Group and
H8S/2227 Group) ...................................................................................................
Figure 27.6 Output Load Circuit................................................................................................
Figure 27.7 I2C Bus Interface Input/Output Timing (Optional).................................................
Figure 27.8 Output Load Circuit................................................................................................
Figure 27.9 Output Load Circuit................................................................................................
Figure 27.10 System Clock Timing.............................................................................................
Figure 27.11 Oscillation Stabilization Timing.............................................................................
Figure 27.12 Reset Input Timing.................................................................................................
Figure 27.13 Interrupt Input Timing............................................................................................
Figure 27.14 Basic Bus Timing (Two-State Access)...................................................................
Figure 27.15 Basic Bus Timing (Three-State Access).................................................................
Figure 27.16 Basic Bus Timing (Three-State Access with One Wait State) ...............................
Figure 27.17 Burst ROM Access Timing (Two-State Access)....................................................
Figure 27.18 Burst ROM Access Timing (One-State Access) ....................................................
Figure 27.19 External Bus Release Timing .................................................................................
Figure 27.20 DMAC Single Address Transfer Timing (Two-State Access) ...............................
Figure 27.21 DMAC Single Address Transfer Timing (Three-State Access) .............................
Figure 27.22 DMAC TEND Output Timing................................................................................
Figure 27.23 DMAC DREQ Input Timing ..................................................................................
Figure 27.24 I/O Port Input/Output Timing.................................................................................
Figure 27.25 TPU Input/Output Timing ......................................................................................
Figure 27.26 TPU Clock Input Timing........................................................................................
Figure 27.27 8-Bit Timer Output Timing ....................................................................................
Figure 27.28 8-Bit Timer Clock Input Timing ............................................................................
Figure 27.29 8-Bit Timer Reset Input Timing .............................................................................
Figure 27.30 WDT_1 Output Timing ..........................................................................................
Figure 27.31 SCK Clock Input Timing........................................................................................
Figure 27.32 SCI Input/Output Timing (Clocked Synchronous Mode).......................................
Figure 27.33 A/D Converter External Trigger Input Timing.......................................................
Figure 27.34 I2C Bus Interface Input/Output Timing (Optional).................................................
842
843
853
859
873
896
948
948
949
949
950
951
952
953
954
954
955
956
957
957
957
958
958
958
959
959
959
959
960
960
960
Appendix C Package Dimensions
Figure C.1 TFP-100B Package Dimensions.............................................................................
Figure C.2 TFP-100G Package Dimensions.............................................................................
Figure C.3 FP-100A Package Dimensions ...............................................................................
Figure C.4 FP-100B Package Dimensions ...............................................................................
Figure C.5 BP-112 Package Dimensions .................................................................................
Figure C.6 TBP-112A, TBP-112AV Package Dimensions......................................................
973
974
975
976
977
978
Rev. 5.00 Aug 08, 2006 page lxxvii of lxxxvi
Tables
Section 1 Overview
Table 1.1
Pin Arrangements in Each Mode of H8S/2258 Group ...........................................
Table 1.2
Pin Arrangements in Each Mode of H8S/2239 Group ...........................................
Table 1.3
Pin Arrangements in Each Mode of H8S/2238 Group ...........................................
Table 1.4
Pin Arrangements in Each Mode of H8S/2237 Group ...........................................
Table 1.5
Pin Arrangements in Each Mode of H8S/2227 Group ...........................................
Table 1.6
Pin Functions of H8S/2258 Group .........................................................................
Table 1.7
Pin Functions of H8S/2239 Group and H8S/2238 Group ......................................
Table 1.8
Pin Functions of H8S/2237 Group and H8S/2227 Group ......................................
20
24
29
34
39
44
50
57
Section 2 CPU
Table 2.1
Instruction Classification........................................................................................
Table 2.2
Operation Notation.................................................................................................
Table 2.3
Data Transfer Instructions ......................................................................................
Table 2.4
Arithmetic Operations Instructions ........................................................................
Table 2.5
Logic Operations Instructions ................................................................................
Table 2.6
Shift Instructions ....................................................................................................
Table 2.7
Bit Manipulation Instructions.................................................................................
Table 2.8
Branch Instructions ................................................................................................
Table 2.9
System Control Instructions ...................................................................................
Table 2.10 Block Data Transfer Instructions............................................................................
Table 2.11 Addressing Modes..................................................................................................
Table 2.12 Absolute Address Access Ranges ..........................................................................
Table 2.13 Effective Address Calculation................................................................................
79
80
81
82
84
84
85
87
88
89
90
92
94
Section 3 MCU Operating Modes
Table 3.1
MCU Operating Mode Selection............................................................................ 103
Table 3.2
Pin Functions in Each Operating Mode.................................................................. 108
Section 4 Exception Handling
Table 4.1
Exception Types and Priority .................................................................................
Table 4.2
Exception Handling Vector Table..........................................................................
Table 4.3
Reset Types ............................................................................................................
Table 4.4
Status of CCR and EXR after Trace Exception Handling ......................................
Table 4.5
Status of CCR and EXR after Trap Instruction Exception Handling .....................
Rev. 5.00 Aug 08, 2006 page lxxviii of lxxxvi
119
120
121
124
125
Section 5 Interrupt Controller
Table 5.1
Pin Configuration ...................................................................................................
Table 5.2
Interrupt Sources, Vector Addresses, and Interrupt Priorities ................................
Table 5.3
Interrupt Control Modes .........................................................................................
Table 5.4
Interrupts Selected in Each Interrupt Control Mode (1) .........................................
Table 5.5
Interrupts Selected in Each Interrupt Control Mode (2) .........................................
Table 5.6
Operations and Control Signal Functions in Each Interrupt Control Mode ...........
Table 5.7
Interrupt Response Times.......................................................................................
Table 5.8
Number of States in Interrupt Handling Routine Execution Status ........................
Table 5.9
Interrupt Source Selection and Clear Control.........................................................
129
137
142
143
144
144
150
151
153
Section 7 Bus Controller
Table 7.1
Pin Configuration ...................................................................................................
Table 7.2
Bus Specifications for Each Area (Basic Bus Interface) ........................................
Table 7.3
Data Buses Used and Valid Strobes .......................................................................
Table 7.4
Pin States in Idle Cycle...........................................................................................
Table 7.5
Pin States in Bus Released State.............................................................................
167
177
182
196
197
Section 8 DMA Controller (DMAC)
Table 8.1
Pin Configuration ...................................................................................................
Table 8.2
Short Address Mode and Full Address Mode (Channel 0).....................................
Table 8.3
DMAC Activation Sources.....................................................................................
Table 8.4
DMAC Transfer Modes..........................................................................................
Table 8.5
Register Functions in Sequential Mode..................................................................
Table 8.6
Register Functions in Idle Mode ............................................................................
Table 8.7
Register Functions in Repeat Mode........................................................................
Table 8.8
Register Functions in Single Address Mode ..........................................................
Table 8.9
Register Functions in Normal Mode ......................................................................
Table 8.10 Register Functions in Block Transfer Mode...........................................................
Table 8.11 DMAC Channel Priority Order ..............................................................................
Table 8.12 Interrupt Sources and Priority Order ......................................................................
205
206
232
234
236
239
241
245
248
251
271
275
Section 9 Data Transfer Controller (DTC)
Table 9.1
Activation Source and DTCER Clearance .............................................................
Table 9.2
Interrupt Sources, DTC Vector Addresses, and Corresponding DTCEs ................
Table 9.3
Register Information in Normal Mode ...................................................................
Table 9.4
Register Information in Repeat Mode ....................................................................
Table 9.5
Register Information in Block Transfer Mode .......................................................
Table 9.6
DTC Execution Status ............................................................................................
289
292
295
296
297
301
Rev. 5.00 Aug 08, 2006 page lxxix of lxxxvi
Table 9.7
Number of States Required for Each Execution Status .......................................... 301
Section 10 I/O Ports
Table 10.1 Port Functions ........................................................................................................
Table 10.2 Input Pull-Up MOS States in Port A ......................................................................
Table 10.3 Input Pull-Up MOS States in Port B ......................................................................
Table 10.4 Input Pull-Up MOS States in Port C ......................................................................
Table 10.5 Input Pull-Up MOS States in Port D ......................................................................
Table 10.6 Input Pull-Up MOS States in Port E ......................................................................
306
332
339
342
346
349
Section 11
Table 11.1
Table 11.2
Table 11.3
Table 11.4
Table 11.5
Table 11.6
Table 11.7
Table 11.8
Table 11.9
Table 11.10
Table 11.11
Table 11.12
Table 11.13
Table 11.14
Table 11.15
Table 11.16
Table 11.17
Table 11.18
Table 11.19
Table 11.20
Table 11.21
Table 11.22
Table 11.23
Table 11.24
Table 11.25
Table 11.26
Table 11.27
Table 11.28
Table 11.29
360
364
368
368
369
369
370
370
371
371
373
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
405
409
16-Bit Timer Pulse Unit (TPU)
TPU Functions........................................................................................................
Pin Configuration ...................................................................................................
CCLR2 to CCLR0 (Channels 0 and 3)...................................................................
CCLR2 to CCLR0 (Channels 1, 2, 4, and 5)..........................................................
TPSC2 to TPSC0 (Channel 0)................................................................................
TPSC2 to TPSC0 (Channel 1)................................................................................
TPSC2 to TPSC0 (Channel 2)................................................................................
TPSC2 to TPSC0 (Channel 3)................................................................................
TPSC2 to TPSC0 (Channel 4)................................................................................
TPSC2 to TPSC0 (Channel 5)................................................................................
MD3 to MD0..........................................................................................................
TIORH_0 ..............................................................................................................
TIORL_0 ..............................................................................................................
TIOR_1 ..............................................................................................................
TIOR_2 ..............................................................................................................
TIORH_3 ..............................................................................................................
TIORL_3 ..............................................................................................................
TIOR_4 ..............................................................................................................
TIOR_5 ..............................................................................................................
TIORH_0 ..............................................................................................................
TIORL_0 ..............................................................................................................
TIOR_1 ..............................................................................................................
TIOR_2 ..............................................................................................................
TIORH_3 ..............................................................................................................
TIORL_3 ..............................................................................................................
TIOR_4 ..............................................................................................................
TIOR_5 ..............................................................................................................
Register Combinations in Buffer Operation...........................................................
Cascaded Combinations .........................................................................................
Rev. 5.00 Aug 08, 2006 page lxxx of lxxxvi
Table 11.30
Table 11.31
Table 11.32
Table 11.33
Table 11.34
Table 11.35
Table 11.36
PWM Output Registers and Output Pins ................................................................
Clock Input Pins in Phase Counting Mode.............................................................
Up/Down-Count Conditions in Phase Counting Mode 1 .......................................
Up/Down-Count Conditions in Phase Counting Mode 2 .......................................
Up/Down-Count Conditions in Phase Counting Mode 3 .......................................
Up/Down-Count Conditions in Phase Counting Mode 4 .......................................
TPU Interrupts........................................................................................................
412
416
418
419
420
421
424
Section 12 8-Bit Timers
Table 12.1 Pin Configuration ...................................................................................................
Table 12.2 8-Bit Timer Interrupt Sources ................................................................................
Table 12.3 Timer Output Priorities ..........................................................................................
Table 12.4 Switching of Internal Clock and TCNT Operation.................................................
443
458
461
462
Section 13 Watchdog Timer (WDT)
Table 13.1 Pin Configuration ................................................................................................... 467
Table 13.2 WDT Interrupt Source............................................................................................ 476
Section 14 IEBus
 Controller (IEB) [H8S/2258 Group]
Table 14.1 Mode Types............................................................................................................
Table 14.2 Transfer speed and Maximum Number of Transfer Bytes in Each
Communications Mode ..........................................................................................
Table 14.3 Contents of Message Length Bits...........................................................................
Table 14.4 Control Bit Contents...............................................................................................
Table 14.5 Control Field for Locked Slave Unit ......................................................................
Table 14.6 Pin Configuration ...................................................................................................
Section 15 Serial Communication Interface (SCI)
Table 15.1 Pin Configuration ...................................................................................................
Table 15.2 The Relationships between the N Setting in BRR and Bit Rate B .........................
Table 15.3 BRR Settings for Various Bit Rates (Asynchronous Mode) ..................................
Table 15.4 Maximum Bit Rate for Each Frequency (Asynchronous Mode) ............................
Table 15.5 Maximum Bit Rate with External Clock Input (Asynchronous Mode) ..................
Table 15.6 BRR Settings for Various Bit Rates (Clocked Synchronous Mode) ......................
Table 15.7 Maximum Bit Rate with External Clock Input (Clocked Synchronous Mode) ......
Table 15.8 Examples of Bit Rate for Various BRR Settings (Smart Card Interface Mode)
(When n = 0 and S = 372) ......................................................................................
Table 15.9 Maximum Bit Rate at Various Frequencies (Smart Card Interface Mode)
(When S = 372) ......................................................................................................
Table 15.10 Serial Transfer Formats (Asynchronous Mode) .....................................................
483
484
489
493
494
497
551
571
572
576
577
578
579
580
580
586
Rev. 5.00 Aug 08, 2006 page lxxxi of lxxxvi
Table 15.11 SSR Status Flags and Receive Data Handling........................................................ 593
Table 15.12 Interrupt Sources of Serial Communication Interface Mode.................................. 623
Table 15.13 Interrupt Sources in Smart Card Interface Mode.................................................... 624
Section 16 I2C Bus Interface (IIC) (Option)
Table 16.1 Pin Configuration ................................................................................................... 636
Table 16.2 Transfer Format...................................................................................................... 640
Table 16.3 I2C Transfer Rate.................................................................................................... 642
Table 16.4 Flags and Transfer States ....................................................................................... 648
Table 16.5 Flags and Transfer States ....................................................................................... 673
Table 16.6 IIC Interrupt Source ............................................................................................... 676
Table 16.7 I2C Bus Timing (SCL and SDA Output) ................................................................ 677
Table 16.8 Permissible SCL Rise Time (tsr) Values................................................................. 678
Table 16.9 I2C Bus Timing (with Maximum Influence of tSr/tSf) ............................................. 679
Section 17 A/D Converter
Table 17.1 Pin Configuration ...................................................................................................
Table 17.2 Analog Input Channels and Corresponding ADDR Registers................................
Table 17.3 A/D Conversion Time (Single Mode) ....................................................................
Table 17.4 A/D Conversion Time (Scan Mode).......................................................................
Table 17.5 A/D Converter Interrupt Source .............................................................................
Table 17.6 Analog Pin Specifications ......................................................................................
691
692
700
700
701
706
Section 18 D/A Converter
Table 18.1 Pin Configuration ................................................................................................... 708
Table 18.2 D/A Conversion Control ........................................................................................ 709
Section 20 Flash Memory (F-ZTAT Version)
Table 20.1 Differences between Boot Mode and User Program Mode....................................
Table 20.2 Pin Configuration ...................................................................................................
Table 20.3 Setting On-Board Programming Modes .................................................................
Table 20.4 Boot Mode Operation.............................................................................................
Table 20.5 System Clock Frequencies for Which Automatic Adjustment of LSI Bit Rate
Is Possible...............................................................................................................
Table 20.6 Flash Memory Operating States .............................................................................
Table 20.7 Registers Present in F-ZTAT Version but Absent in Masked ROM Version ........
717
724
732
734
734
745
751
Section 22 PROM
Table 22.1 Selecting PROM Mode .......................................................................................... 755
Table 22.2 Socket Adapters...................................................................................................... 758
Rev. 5.00 Aug 08, 2006 page lxxxii of lxxxvi
Table 22.3
Table 22.4
Table 22.5
Mode Selection in PROM Mode ............................................................................ 759
DC Characteristics in PROM Mode ....................................................................... 761
AC Characteristics in PROM Mode ....................................................................... 762
Section 23 Clock Pulse Generator
Table 23.1 Damping Resistance Value.....................................................................................
Table 23.2 Crystal Resonator Characteristics...........................................................................
Table 23.3 External Clock Input Conditions (1) (H8S/2258 Group) .......................................
Table 23.3 External Clock Input Conditions (2) (H8S/2238B, H8S/2236B) ...........................
Table 23.3 External Clock Input Conditions (3) (H8S/2238R, H8S/2236R) ...........................
Table 23.3 External Clock Input Conditions (4) (H8S/2237 Group, H8S/2227 Group) ..........
Table 23.3 External Clock Input Conditions (5) (H8S/2239 Group) .......................................
Table 23.4 External Clock Input Conditions (Duty Adjustment Circuit Unused) (1)
(H8S/2258 Group)..................................................................................................
Table 23.4 External Clock Input Conditions (Duty Adjustment Circuit Unused) (2)
(H8S/2238B, H8S/2236B).............................................................................................
Table 23.4 External Clock Input Conditions (Duty Adjustment Circuit Unused) (3)
(H8S/2238R, H8S/2236R).............................................................................................
Table 23.4 External Clock Input Conditions (Duty Adjustment Circuit Unused) (4)
(H8S/2237 Group, H8S/2227 Group)............................................................................
Table 23.4 External Clock Input Conditions (Duty Adjustment Circuit Unused) (5)
(H8S/2239 Group) .........................................................................................................
771
771
772
773
773
774
774
775
775
776
776
777
Section 24 Power-Down Modes
Table 24.1 LSI Internal States in Each Mode...........................................................................
Table 24.2 Low Power Dissipation Mode Transition Conditions ............................................
Table 24.3 Oscillation Settling Time Settings..........................................................................
Table 24.4 φ Pin States in Respective Processes ......................................................................
784
786
793
800
Section 27 Electrical Characteristics
Table 27.1 Absolute Maximum Ratings...................................................................................
Table 27.2 DC Characteristics (1) ............................................................................................
Table 27.2 DC Characteristics (2) ............................................................................................
Table 27.2 DC Characteristics (3) ............................................................................................
Table 27.3 Permissible Output Current ....................................................................................
Table 27.4 Bus Driving Characteristics....................................................................................
Table 27.5 Clock Timing..........................................................................................................
Table 27.6 Control Signal Timing............................................................................................
Table 27.7 Bus Timing.............................................................................................................
Table 27.8 Timing of On-Chip Peripheral Modules.................................................................
844
845
847
849
851
852
854
855
856
857
Rev. 5.00 Aug 08, 2006 page lxxxiii of lxxxvi
Table 27.9
Table 27.10
Table 27.11
Table 27.12
Table 27.13
Table 27.14
Table 27.14
Table 27.14
Table 27.15
Table 27.16
Table 27.17
Table 27.18
Table 27.19
Table 27.20
Table 27.21
Table 27.22
Table 27.23
Table 27.24
Table 27.25
Table 27.26
Table 27.27
Table 27.27
Table 27.27
Table 27.28
Table 27.29
Table 27.30
Table 27.31
Table 27.32
Table 27.33
Table 27.34
Table 27.35
Table 27.36
Table 27.37
Table 27.38
Table 27.39
Table 27.39
Table 27.39
Table 27.40
Table 27.41
Table 27.42
I2C Bus Timing.......................................................................................................
A/D Conversion Characteristics .............................................................................
D/A Conversion Characteristics .............................................................................
Flash Memory Characteristics................................................................................
Absolute Maximum Ratings...................................................................................
DC Characteristics (1) ............................................................................................
DC Characteristics (2) ............................................................................................
DC Characteristics (3) ............................................................................................
Permissible Output Currents ..................................................................................
Bus Driving Characteristics....................................................................................
Clock Timing..........................................................................................................
Control Signal Timing............................................................................................
Bus Timing.............................................................................................................
DMAC Timing .......................................................................................................
Timing of On-Chip Peripheral Modules.................................................................
I2C Bus Timing.......................................................................................................
A/D Conversion Characteristics .............................................................................
D/A Conversion Characteristics .............................................................................
Flash Memory Characteristics................................................................................
Absolute Maximum Ratings...................................................................................
DC Characteristics (1) ............................................................................................
DC Characteristics (2) ............................................................................................
DC Characteristics (3) ............................................................................................
Permissible Output Currents ..................................................................................
Bus Drive Characteristics.......................................................................................
Clock Timing..........................................................................................................
Control Signal Timing............................................................................................
Bus Timing.............................................................................................................
Timing of On-Chip Peripheral Modules.................................................................
I2C Bus Timing.......................................................................................................
A/D Conversion Characteristics (F-ZTAT and Masked ROM Versions) ..............
D/A Conversion Characteristics (F-ZTAT and Masked ROM Versions) ..............
Flash Memory Characteristics................................................................................
Absolute Maximum Ratings...................................................................................
DC Characteristics (1) ............................................................................................
DC Characteristics (2) ............................................................................................
DC Characteristics (3) ............................................................................................
Permissible Output Currents ..................................................................................
Bus Driving Characteristics....................................................................................
Clock Timing..........................................................................................................
Rev. 5.00 Aug 08, 2006 page lxxxiv of lxxxvi
858
860
861
862
864
865
867
869
871
872
874
876
877
879
880
882
883
884
885
887
888
890
892
894
895
897
898
899
901
903
904
904
905
907
908
910
912
914
915
916
Table 27.43
Table 27.44
Table 27.45
Table 27.46
Table 27.47
Table 27.48
Table 27.49
Table 27.50
Table 27.51
Table 27.51
Table 27.51
Table 27.51
Table 27.52
Table 27.53
Table 27.54
Table 27.55
Table 27.56
Table 27.57
Table 27.58
Table 27.59
Control Signal Timing............................................................................................
Bus Timing.............................................................................................................
Timing of On-Chip Peripheral Modules.................................................................
I2C Bus Timing.......................................................................................................
A/D Conversion Characteristics .............................................................................
D/A Conversion Characteristics .............................................................................
Flash Memory Characteristics ................................................................................
Absolute Maximum Ratings...................................................................................
DC Characteristics (1) ............................................................................................
DC Characteristics (2) ............................................................................................
DC Characteristics (3) ............................................................................................
DC Characteristics (4) ............................................................................................
Permissible Output Currents...................................................................................
Clock Timing..........................................................................................................
Control Signal Timing............................................................................................
Bus Timing.............................................................................................................
Timing of On-Chip Peripheral Modules.................................................................
A/D Conversion Characteristics .............................................................................
D/A Conversion Characteristics .............................................................................
Flash Memory Characteristics ................................................................................
917
918
920
922
923
924
925
927
928
930
932
934
936
937
939
940
942
944
945
946
Appendix B
Table B.1
Table B.2
Table B.3
Table B.4
Product Codes
Product Codes of H8S/2258 Group ........................................................................
Product Codes of H8S/2239 Group ........................................................................
Product Codes of H8S/2238 Group ........................................................................
Product Codes of H8S/2237 Group and H8S/2227 Group .....................................
968
969
970
972
Rev. 5.00 Aug 08, 2006 page lxxxv of lxxxvi
Rev. 5.00 Aug 08, 2006 page lxxxvi of lxxxvi
Section 1 Overview
Section 1 Overview
1.1
Features
• High-speed H8S/2000 central processing unit with an internal 16-bit architecture
 Upward-compatible with H8/300 and H8/300H CPUs on an object level
 Sixteen 16-bit general registers
 65 basic instructions
• Various peripheral functions
 PC break controller
 DMA controller (DMAC)
Supported only by the H8S/2239 Group.
 Data transfer controller (DTC)
 16-bit timer-pulse unit (TPU)
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, and H8S/2237 Group: Six channels
H8S/2227 Group: Three channels
 8-bit timer (TMR)
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group: Four channels
H8S/2237 Group, H8S/2227 Group: Two channels
 Watchdog timer (WDT)
 Serial communication interface (SCI)
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, and H8S/2237 Group: Four
channels (SCI_0 to SCI_3)
H8S/2227 Group: Three channels (SCI_0, SCI_1, and SCI_3)
 I2C bus interface (IIC)
Optional function for the H8S/2258 Group, H8S/2239 Group, and H8S/2238 Group
 10-bit A/D converter
 8-bit D/A converter
Not available in the H8S/2227 Group.
 IEBus controller (IEB)
H8S/2258 Group: One channel
Rev. 5.00 Aug 08, 2006 page 1 of 982
REJ09B0054-0500
Section 1 Overview
• On-chip memory
ROM
Model
ROM
RAM
Flash memory
version
HD64F2258
256 kbytes
16 kbytes
HD64F2239
384 kbytes
32 kbytes
HD64F2238B
256 kbytes
16 kbytes
HD64F2238R
256 kbytes
16 kbytes
HD64F2227
128 kbytes
16 kbytes
PROM version
HD6472237
128 kbytes
16 kbytes
Masked ROM
version
HD6432258
256 kbytes
16 kbytes
HD6432258W
256 kbytes
16 kbytes
HD6432256
128 kbytes
8 kbytes
HD6432256W
128 kbytes
8 kbytes
HD6432239
384 kbytes
32 kbytes
HD6432239W
384 kbytes
32 kbytes
HD6432238B
256 kbytes
16 kbytes
HD6432238BW
256 kbytes
16 kbytes
HD6432238R
256 kbytes
16 kbytes
HD6432238RW
256 kbytes
16 kbytes
HD6432236B
128 kbytes
8 kbytes
HD6432236BW
128 kbytes
8 kbytes
HD6432236R
128 kbytes
8 kbytes
HD6432236RW
128 kbytes
8 kbytes
HD6432237
128 kbytes
16 kbytes
HD6432235
128 kbytes
4 kbytes
HD6432233
64 kbytes
4 kbytes
HD6432227
128 kbytes
16 kbytes
HD6432225
128 kbytes
4 kbytes
HD6432224
96 kbytes
4 kbytes
HD6432223
64 kbytes
4 kbytes
• General I/O ports
 I/O pins: 72
 Input-only pins: 10
• Supports various power-down states
Rev. 5.00 Aug 08, 2006 page 2 of 982
REJ09B0054-0500
Remarks
Section 1 Overview
• Compact package
Package
(Code)*
Body Size
Pin Pitch
TQFP-100
TFP-100B,
TFP-100BV
14.0 × 14.0 mm
0.5 mm
TQFP-100*
TFP-100G,
TFP-100GV
12.0 × 12.0 mm
0.4 mm
QFP-100*
3
QFP-100*
FP-100A, FP-100AV
14.0 × 20.0 mm
0.65 mm
FP-100B, FP-100BV
14.0 × 14.0 mm
0.5 mm
4
LFBGA-112*
BP-112, BP-112V
10.0 × 10.0 mm
0.8 mm
5
TFBGA-112*
TBP-112A,
TBP-112AV
10.0 × 10.0 mm
0.8 mm
6
1
2
Notes: 1. Not supported by the H8S/2258 Group.
2. Supported only by the H8S/2258 Group, H8S/2238B, H8S/2236B, H8S/2237 Group,
and HD6432227.
3. Not supported by the HD64F2227.
4. Supported only by the HD64F2238R.
5. Supported only by theHD64F2238R and HD64F2239.
6. Package code ending in the letter V designate Pb-free Product.
Rev. 5.00 Aug 08, 2006 page 3 of 982
REJ09B0054-0500
Section 1 Overview
1.2
Internal Block Diagram
Port A
Port B
8-bit timer (4 channels)
ROM
Port F
PF7 /φ
PF6 /AS
PF5 /RD
PF4 /HWR
PF3 /LWR/ADTRG/IRQ3
PF2 /WAIT
PF1 /BACK/BUZZ
PF0 /BREQ/IRQ2
WDT1
(subclock)
Port C
WDT0
PB7 /A15/TIOCB5
PB6 /A14/TIOCA5
PB5 /A13/TIOCB4
PB4 /A12/TIOCA4
PB3 / A11/TIOCD3
PB2 /A10/TIOCC3
PB1 /A9/TIOCB3
PB0 /A8/TIOCA3
PC7/A7
PC6/A6
PC5/A5
PC4/A4
PC3/A3
PC2/A2
PC1/A1
PC0/A0
Port 3
PC break
controller
(2 channels)
PA3 /A19/SCK2
PA2 /A18/RxD2
PA1 /A17/TxD2
PA0 /A16
P36
P35 /SCK1/SCL0/IRQ5
P34 /RxD1/SDA0
P33 /TxD1/SCL1
P32 /SCK0/SDA1/IRQ4
P31 /RxD0
P30 /TxD0
Port 9
DTC
Peripheral data bus
Interrupt
controller
Peripheral address bus
Subclock
pulse
generator
H8S/2000 CPU
Bus controller
PE7 / D7
PE6 / D6
PE5 /D5
PE4 /D4
PE3 /D3
PE2 /D2
PE1 /D1
PE0 /D0
Port E
Internal address bus
Port D
Internal data bus
System clock
pulse
generator
MD2
MD1
MD0
EXTAL
XTAL
OSC1
OSC2
STBY
RES
NMI
FWE
PD7 / D15
PD6 / D14
PD5 / D13
PD4 / D12
PD3 / D11
PD2 / D10
PD1 / D9
PD0 / D8
CVCC
VCC
VSS
VSS
Figures 1.1 to 1.5 show the internal block diagrams.
P97 /DA1
P96 /DA0
SCI (4 channels)
IIC bus interface (option)
RAM
D/A converter (2 channels)
TPU (6 channels)
A/D converter (8 channels)
Port 4
P47 / AN7
P46 / AN6
P45 / AN5
P44 / AN4
P43 / AN3
P42 / AN2
P41 / AN1
P40 / AN0
Port 7
Vref
AVCC
AVSS
Port 1
P70 / T M R I 0 1 / T M C I 0 1 /CS4
P71 / T M R I 2 3 / T M C I 2 3 /CS5
P72 / TMO0/CS6
P73 / TMO1/CS7
P74 / T M O 2 /MRES
P75 / T M O 3 /SCK3
P76 / RxD3
P77 / TxD3
IEB (1 channel)
P10 / TIOCA0 /A20
P11 / TIOCB0 /A21
P12 / TIOCC0 / TCLKA/A22
P13 / TIOCD0 / TCLKB/A23
P14 / TIOCA1/IRQ0
P15 / TIOCB1 / TCLKC
P16 / TIOCA2/IRQ1
P17 / TIOCB2/ TCLKD
Port G
PG4 /CS0
PG3 /CS1
PG2 /CS2
PG1 /CS3/IRQ7
PG0 /IRQ6
Figure 1.1 Internal Block Diagram of H8S/2258 Group
Rev. 5.00 Aug 08, 2006 page 4 of 982
REJ09B0054-0500
Port A
Port B
8-bit timer (4 channels)
ROM
Port F
PF7/φ
PF6/AS
PF5/RD
PF4/HWR
PF3/LWR/ADTRG/IRQ3
PF2/WAIT
PF1/BACK/BUZZ
PF0/BREQ/IRQ2
Port C
WDT1
(subclock)
WDT0
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PB5/A13/TIOCB4
PB4/A12/TIOCA4
PB3 / A11/TIOCD3
PB2/A10/TIOCC3
PB1/A9/TIOCB3
PB0/A8/TIOCA3
PC7/A7
PC6/A6
PC5/A5
PC4/A4
PC3/A3
PC2/A2
PC1/A1
PC0/A0
Port 3
PC break
controller
(2 channels)
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
P36
P35/SCK1/SCL0/IRQ5
P34/RxD1/SDA0
P33/TxD1/SCL1
P32/SCK0/SDA1/IRQ4
P31/RxD0
P30/TxD0
Port 9
DTC
Peripheral data bus
DMAC
Interrupt
controller
Peripheral address bus
Subclock
pulse
generator
H8S/2000 CPU
Bus controller
PE7 / D7
PE6 / D6
PE5 / D5
PE4 / D4
PE3 / D3
PE2 / D2
PE1 / D1
PE0 / D0
Port E
Internal address bus
Port D
Internal data bus
System clock
pulse
generator
MD2
MD1
MD0
EXTAL
XTAL
OSC1
OSC2
STBY
RES
NMI
FWE
PD7 / D15
PD6 / D14
PD5 / D13
PD4 / D12
PD3 / D11
PD2 / D10
PD1 / D9
PD0 / D8
CVCC
VCC
VSS
VSS
Section 1 Overview
P97/DA1
P96/DA0
SCI (4 channels)
IIC bus interface (option)
RAM
TPU (6 channels)
Port 4
P47 / AN7
P46 / AN6
P45 / AN5
P44 / AN4
P43 / AN3
P42 / AN2
P41 / AN1
P40 / AN0
Port 7
Vref
AVCC
AVSS
Port 1
P70 / T M R I 0 1 / T M C I 0 1 /DREQ0/ CS4
P71 / T M R I 2 3 / T M C I 2 3 /DREQ1/ CS5
P72 / TMO0/TEND0/ CS6
P73 / TMO1/TEND1/ CS7
P74 / T M O 2 / MRES
P75 / T M O 3 / SCK3
P76 / RxD3
P77 / TxD3
A/D converter (8 channels)
P10 / TIOCA0 /DACK0/A20
P11 / TIOCB0 /DACK1/A21
P12 / TIOCC0 / TCLKA/A22
P13 / TIOCD0 / TCLKB/A23
P14 / TIOCA1/IRQ0
P15 / TIOCB1 / TCLKC
P16 / TIOCA2/IRQ1
P17 / TIOCB2/ TCLKD
Port G
D/A converter (2 channels)
PG4/CS0
PG3/CS1
PG2/CS2
PG1/CS3/IRQ7
PG0/IRQ6
Figure 1.2 Internal Block Diagram of H8S/2239 Group
Rev. 5.00 Aug 08, 2006 page 5 of 982
REJ09B0054-0500
Port A
Port B
8-bit timer (4 channels)
ROM
Port F
PF7/φ
PF6/AS
PF5/RD
PF4/HWR
PF3/LWR/ADTRG/IRQ3
PF2/WAIT
PF1/BACK/BUZZ
PF0/BREQ/IRQ2
WDT1
(subclock)
Port C
WDT0
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PB5/A13/TIOCB4
PB4/A12/TIOCA4
PB3 / A11/TIOCD3
PB2/A10/TIOCC3
PB1/A9/TIOCB3
PB0/A8/TIOCA3
PC7/A7
PC6/A6
PC5/A5
PC4/A4
PC3/A3
PC2/A2
PC1/A1
PC0/A0
Port 3
PC break
controller
(2 channels)
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
P36
P35/SCK1/SCL0/IRQ5
P34/RxD1/SDA0
P33/TxD1/SCL1
P32/SCK0/SDA1/IRQ4
P31/RxD0
P30/TxD0
Port 9
DTC
Peripheral data bus
Interrupt
controller
Peripheral address bus
Subclock
pulse
generator
H8S/2000 CPU
Bus controller
PE7 / D7
PE6 / D6
PE5 / D5
PE4 / D4
PE3 / D3
PE2 / D2
PE1 / D1
PE0 / D0
Port E
Internal address bus
Port D
Internal data bus
System clock
pulse
generator
MD2
MD1
MD0
EXTAL
XTAL
OSC1
OSC2
STBY
RES
NMI
FWE
PD7 / D15
PD6 / D14
PD5 / D13
PD4 / D12
PD3 / D11
PD2 / D10
PD1 / D9
PD0 / D8
CVCC
VCC
VSS
VSS
Section 1 Overview
P97/DA1
P96/DA0
SCI (4 channels)
IIC bus interface (option)
RAM
TPU (6 channels)
Port 4
P47 / AN7
P46 / AN6
P45 / AN5
P44 / AN4
P43 / AN3
P42 / AN2
P41 / AN1
P40 / AN0
Port 7
Vref
AVCC
AVSS
Port 1
P70/TMRI01/TMCI01/CS4
P71/TMRI23/TMCI23/CS5
P72/TMO0/CS6
P73/TMO1/CS7
P74/TMO2/MRES
P75/TMO3/SCK3
P76/RxD3
P77/TxD3
A/D converter (8 channels)
P10 / TIOCA0 /A20
P11 / TIOCB0 /A21
P12 / TIOCC0 / TCLKA/A22
P13 / TIOCD0 / TCLKB/A23
P14 / TIOCA1/IRQ0
P15 / TIOCB1 / TCLKC
P16 / TIOCA2/IRQ1
P17 / TIOCB2/ TCLKD
Port G
D/A converter (2 channels)
PG4/CS0
PG3/CS1
PG2/CS2
PG1/CS3/IRQ7
PG0/IRQ6
Figure 1.3 Internal Block Diagram of H8S/2238 Group
Rev. 5.00 Aug 08, 2006 page 6 of 982
REJ09B0054-0500
Port A
Port B
P36
P35/SCK1/IRQ5
P34/RxD1
P33/TxD1
P32/SCK0/IRQ4
P31/RxD0
P30/TxD0
P97/ DA1
P96 /DA0
Port F
8-bit timer (2 channels)
SCI (4 channels)
RAM
D/A converter (2 channels)
TPU (6 channels)
Port 4
P47 / AN7
P46 / AN6
P45 / AN5
P44 / AN4
P43 / AN3
P42 / AN2
P41 / AN1
P40 / AN0
Port 7
Vref
AVCC
AVSS
Port 1
P70 / T M R I 0 1 /TMCI01/CS4
P71 /CS5
P72 / TMO0/CS6
P73 / TMO1/CS7
P74 /MRES
P75 / SCK3
P76 / RxD3
P77 / TxD3
A/D converter (8 channels)
P10 / TIOCA0 /A20
P11 / TIOCB0 /A21
P12 / TIOCC0 / TCLKA/A22
P13 / TIOCD0 / TCLKB/A23
P14 / TIOCA1/IRQ0
P15 / TIOCB1 / TCLKC
P16 / TIOCA2/IRQ1
P17 / TIOCB2/ TCLKD
PG4/ CS0
PG3/ CS1
PG2/ CS2
PG1/ CS3/IRQ7
PG0/ IRQ6
PC7/ A7
PC6/ A6
PC5/ A5
PC4/ A4
PC3/ A3
PC2/ A2
PC1/ A1
PC0/ A0
ROM
Port G
PF7/ φ
PF6/ AS
PF5/ RD
PF4/ HWR
PF3/ LWR/ADTRG/IRQ3
PF2/ WAIT
PF1/ BACK/BUZZ
PF0/ BREQ/IRQ2
WDT1
(subclock)
Port C
WDT0
PB7/ A15/TIOCB5
PB6/ A14/TIOCA5
PB5/ A13/TIOCB4
PB4/ A12/TIOCA4
PB3 / A11/TIOCD3
PB2/ A10/TIOCC3
PB1/ A9/TIOCB3
PB0/ A8/TIOCA3
Port 3
PC break
controller
(2 channels)
PA3/ A19/SCK2
PA2/ A18/RxD2
PA1/ A17/TxD2
PA0/ A16
Port 9
DTC
Peripheral data bus
Interrupt
controller
Peripheral address bus
Subclock
pulse
generator
H8S/2000 CPU
Bus controller
PE7 / D7
PE6 / D6
PE5/ D5
PE4/ D4
PE3/ D3
PE2/ D2
PE1/ D1
PE0/ D0
Port E
Internal address bus
Port D
Internal data bus
System clock
pulse
generator
MD2
MD1
MD0
EXTAL
XTAL
OSC1
OSC2
STBY
RES
NMI
FWE
PD7 / D15
PD6 / D14
PD5 / D13
PD4 / D12
PD3 / D11
PD2 / D10
PD1 / D9
PD0 / D8
VCC
VCC
VSS
VSS
Section 1 Overview
Figure 1.4 Internal Block Diagram of H8S/2237 Group
Rev. 5.00 Aug 08, 2006 page 7 of 982
REJ09B0054-0500
Port A
Port B
PC7/ A7
PC6/ A6
PC5/ A5
PC4/ A4
PC3/ A3
PC2/ A2
PC1/ A1
PC0/ A0
P36
P35/SCK1/IRQ5
P34/RxD1
P33/TxD1
P32/SCK0/IRQ4
P31/RxD0
P30/TxD0
P97
P96
ROM
Port F
8-bit timer (2 channels)
SCI (3 channels)
RAM
TPU (3 channels)
Port 4
P47 / AN7
P46 / AN6
P45 / AN5
P44 / AN4
P43 / AN3
P42 / AN2
P41 / AN1
P40 / AN0
Port 7
Vref
AVCC
AVSS
Port 1
P70 / T M R I 0 1 /TMCI01/CS4
P71 /CS5
P72 /TMO0/CS6
P73 /TMO1/CS7
P74 /MRES
P75 /SCK3
P76 /RxD3
P77 /TxD3
A/D converter (8 channels)
P10 /TIOCA0 /A20
P11 /TIOCB0 /A21
P12 /TIOCC0 /TCLKA/A22
P13 /TIOCD0 /TCLKB/A23
P14 /TIOCA1/IRQ0
P15 /TIOCB1 / TCLKC
P16 /TIOCA2/IRQ1
P17 /TIOCB2/ TCLKD
Port G
PG4/CS0
PG3/CS1
PG2/CS2
PG1/CS3/IRQ7
PG0/IRQ6
WDT1
(subclock)
Port C
WDT0
PF7/ φ
PF6/AS
PF5/RD
PF4/HWR
PF3/LWR/ADTRG/IRQ3
PF2/WAIT
PF1/BACK/BUZZ
PF0/BREQ/IRQ2
PB7/A15
PB6/A14
PB5/A13
PB4/A12
PB3 / A11
PB2/A10
PB1/A9
PB0/A8
Port 3
PC break
controller
(2 channels)
PA3/A19
PA2/A18
PA1/A17
PA0/A16
Port 9
DTC
Peripheral data bus
Interrupt
controller
Peripheral address bus
Subclock
pulse
generator
H8S/2000 CPU
Bus controller
PE7 / D7
PE6 / D6
PE5 /D5
PE4 /D4
PE3 /D3
PE2 /D2
PE1 /D1
PE0 /D0
Port E
Internal address bus
Port D
Internal data bus
System clock
pulse
generator
MD2
MD1
MD0
EXTAL
XTAL
OSC1
OSC2
STBY
RES
NMI
FWE
PD7 / D15
PD6 / D14
PD5 / D13
PD4 / D12
PD3 / D11
PD2 / D10
PD1 / D9
PD0 / D8
VCC
VCC
VSS
VSS
Section 1 Overview
Figure 1.5 Internal Block Diagram of H8S/2227 Group
Rev. 5.00 Aug 08, 2006 page 8 of 982
REJ09B0054-0500
Section 1 Overview
1.3
Pin Description
1.3.1
Pin Arrangement
(1) Pin Arrangement of H8S/2258 Group
TFP-100B
TFP-100BV
FP-100B
FP-100BV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PB5/A13/TIOCB4
PB4/A12/TIOCA4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
CVCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
P30/TxD0
P31/RxD0
P32/SCK0/SDA1/IRQ4
P33/TxD1/SCL1
P34/RxD1/SDA0
P35/SCK1/SCL0/IRQ5
P36
P77/TxD3
P76/RxD3
P75/TMO3/SCK3
P74/TMO2/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/TMRI23/TMCI23/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/Tx/CS2
PG3/Rx/CS1
PG4/CS0
PE0/D0
PE1/D1
PE2/D2
PE3/D3
PE4/D4
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
Figures 1.6 and 1.7 show the pin arrangement of the H8S/2258 Group.
Figure 1.6 Pin Arrangement of H8S/2258 Group
(TFP-100B, TFP-100BV, FP-100B, FP-100BV: Top View)
Rev. 5.00 Aug 08, 2006 page 9 of 982
REJ09B0054-0500
FP-100A
FP-100AV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PE2/D2
PE3/D3
PE4/D4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
CVCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
PB4/A12/TIOCA4
PB5/A13/TIOCB4
P32/SCK0/SDA1/IRQ4
P33/TxD1/SCL1
P34/RxD1/SDA0
P35/SCK1/SCL0/IRQ5
P36
P77/TxD3
P76/RxD3
P75/TMO3/SCK3
P74/TMO2/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/TMRI23/TMCI23/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/Tx/CS2
PG3/Rx/CS1
PG4/CS0
PE0/D0
PE1/D1
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
P31/RxD0
P30/TxD0
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
P42/AN2
P43/AN3
P44/AN4
Section 1 Overview
Figure 1.7 Pin Arrangement of H8S/2258 Group
(FP-100A, FP-100AV: Top View)
Rev. 5.00 Aug 08, 2006 page 10 of 982
REJ09B0054-0500
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
Section 1 Overview
(2) Pin Arrangement of H8S/2239 Group
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100BV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/DACK1/A21
P10/TIOCA0/DACK0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PB5/A13/TIOCB4
PB4/A12/TIOCA4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
CVCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
P30/TxD0
P31/RxD0
P32/SCK0/SDA1/IRQ4
P33/TxD1/SCL1
P34/RxD1/SDA0
P35/SCK1/SCL0/IRQ5
P36
P77/TxD3
P76/RxD3
P75/TMO3/SCK3
P74/TMO2/MRES
P73/TMO1/TEND1/CS7
P72/TMO0/TEND0/CS6
P71/TMRI23/TMCI23/DREQ1/CS5
P70/TMRI01/TMCI01/DREQ0/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
PE2/D2
PE3/D3
PE4/D4
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
Figures 1.8 and 1.9 show the pin arrangement of the H8S/2239 Group.
Figure 1.8 Pin Arrangement of H8S/2239 Group
(TFP-100B, TFP-100BV, TFP-100G, TFP-100GV, FP-100B, FP-100BV: Top View)
Rev. 5.00 Aug 08, 2006 page 11 of 982
REJ09B0054-0500
Section 1 Overview
A
NC
11 (Reserve)
B
C
D
E
F
G
H
J
K
L
PF1/
BACK/
BUZZ
PF4/
HWR
PF7/φ
EXTAL
XTAL
STBY
OSC1
MD0
P40/AN0
NC
(Reserve)
NC
(Reserve)
PF2/
WAIT
PF5/RD
FWE
VSS
VCC
OSC2
AVCC
P41/AN1
P42/AN2
PF0/
BREQ/
IRQ2
PF3/
LWR/
ADTRG/
IRQ3
MD2
VCC
NMI
MD1
NC
(Reserve) P43/AN3
P45/AN5
P34/
RxD1/
SDA0
P31/
RxD0
PF6/AS
VSS
RES
Vref
P44/AN4
P46/AN6
P96/DA0
P76/
RxD3
P77/
TxD3
P47/AN7
P97/DA1
AVSS
AVSS
P17/
TIOCB2/
TCLKD
P14/
TIOCA1/
IRQ0
P16/
TIOCA2/
IRQ1
P15/
TIOCB1/
TCLKC
P10/
TIOCA0/
DACK0/
A20
P11/
TIOCB0/
DACK1/
A21
P13/
TIOCD0/
TCLKB/
A23
P12/
TIOCC0/
TCLKA/
A22
10
P30/
TxD0
9
P33/
TxD1/
SCL1
8
P36
7
P75/
TMO3/
SCK3
6
P73/
P71/
P72/
TMO1/
TMRI23/
TMO0/
TEND0/ TMCI23/ TEND1/
CS7
DREQ1/CS5
CS6
P70/
TMRI01/
TMCI01/
DREQ0/CS4
P32/
SCK0/
SDA1/
IRQ4
P35/
SCK1/
SCL0/
IRQ5
P74/
TMO2/
MRES
TBP-112A
TBP-112AV
(TOP VIEW)
5
PG0/
IRQ6
PG1/
CS3/
IRQ7
PG2/
CS2
PG4/
CS0
4
PG3/
CS1
PE0/D0
PE2/D2
PE7/D7
PD5/D13
VSS
PC5/A5
PB6/
A14/
TIOCA5
PA1/
A17/
TxD2
PA2/
A18/
RxD2
PA3/
A19/
SCK2
3
PE1/D1
PE3/D3
NC
(Reserve)
PD2/D10
PD6/D14
CVCC
PC3/A3
PB0/
A8/
TIOCA3
PB3/
A11/
TIOCD3
PB7/
A15/
TIOCB5
PA0/A16
2
PE4/D4
PE5/D5
PD0/D8
PD3/D11
CVCC
VSS
PC2/A2
PC6/A6
PB1/A9/
TIOCB3
PB4/
A12/
TIOCA4
PB5/
A13/
TIOCB4
1
NC
(Reserve)
PE6/D6
PD1/D9
PD4/D12
PD7/D15
PC0/A0
PC1/A1
PC4/A4
PC7/A7
PB2/
A10/
TIOCC3
NC
(Reserve)
INDEX
Figure 1.9 Pin Arrangement of H8S/2239 Group
(TBP-112A, TBP-112AV: Top View, Only for HD64F2239)
Rev. 5.00 Aug 08, 2006 page 12 of 982
REJ09B0054-0500
Section 1 Overview
(3) Pin Arrangement of H8S/2238 Group
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100BV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PB5/A13/TIOCB4
PB4/A12/TIOCA4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
CVCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
P30/TxD0
P31/RxD0
P32/SCK0/SDA1/IRQ4
P33/TxD1/SCL1
P34/RxD1/SDA0
P35/SCK1/SCL0/IRQ5
P36
P77/TxD3
P76/RxD3
P75/TMO3/SCK3
P74/TMO2/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/TMRI23/TMCI23/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
PE2/D2
PE3/D3
PE4/D4
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
Figures 1.10 to 1.12 show the pin arrangement of the H8S/2238 Group.
Figure 1.10 Pin Arrangement of H8S/2238 Group
(TFP-100B, TFP-100BV, TFP-100G, TFP-100GV, FP-100B, FP-100BV: Top View)
Rev. 5.00 Aug 08, 2006 page 13 of 982
REJ09B0054-0500
FP-100A
FP-100AV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PE2/D2
PE3/D3
PE4/D4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
VCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
PB4/A12/TIOCA4
PB5/A13/TIOCB4
P32/SCK0/SDA1/IRQ4
P33/TxD1/SCL1
P34/RxD1/SDA0
P35/SCK1/SCL0/IRQ5
P36
P77/TxD3
P76/RxD3
P75/TMO3/SCK3
P74/TMO2/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/TMRI23/TMCI23/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
P31/RxD0
P30/TxD0
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
P42/AN2
P43/AN3
P44/AN4
Section 1 Overview
Figure 1.11 Pin Arrangement of H8S/2238 Group
(FP-100A, FP-100AV: Top View, Only for H8S/2238B and H8S/2236B)
Rev. 5.00 Aug 08, 2006 page 14 of 982
REJ09B0054-0500
Section 1 Overview
A
B
C
D
E
F
G
H
J
K
L
11
NC
PF1/
BACK/
BUZZ
PF4/
HWR
PF7/φ
EXTAL
XTAL
STBY
OSC1
MD0
P40/AN0
NC
10
P30/
TxD0
NC
PF2/
WAIT PF5/RD
FWE
VSS
VCC
OSC2
9
P33/
TxD1/
SCL1
PF3/L
PF0/
WR/
BREQ/ ADTRG/
IRQ2
IRQ3
MD2
VCC
NMI
MD1
8
P36
PF6/AS
VSS
RES
Vref
7
P75/
TMO3/
SCK3
6
P32/
SCK0/
SDA1/
IRQ4
P35/
SCK1/
SCL0/
IRQ5
P34/
RxD1/
SDA0
P31/
RxD0
P74/
P76/
P77/
TMO2/ RxD3
TxD3
MRES
P70/
P71/
P72/ TMRI23/ P73/ TMRI01/
TMO0/ TMCI23/ TMO1/ TMCI01/
CS7
CS6
CS4
CS5
5
PG0/
IRQ6
4
PG3/
CS1
PG1/
CS3/
IRQ7
PG2/
CS2
PG4/
CS0
BP-112
BP-112V
3
PE1/D1 PE3/D3
2
PE4/D4 PE5/D5 PD0/D8 PD3/D11 CVCC
1
NC
NC
VSS
PD2/D10 PD6/D14 CVCC
VSS
NC
P43/AN3 P45/AN5
P44/AN4 P46/AN6 P96/DA0
P47/AN7 P97/DA1 AVSS
TBP-112A
TBP-112AV
(TOP VIEW)
PE0/D0 PE2/D2 PE7/D7 PD5/D13
AVCC P41/AN1 P42/AN2
AVSS
P15/
P16/
P14/
P17/
TIOCB2/ TIOCA1/ TIOCA2/ TIOCB1/
IRQ1 TCLKC
TCLKD IRQ0
P13/
P12/
P11/
P10/
TIOCD0/
TIOCA0/ TIOCB0/ TCLKB/ TIOCC0/
TCLKA/
A21
A20
A23
A22
PA1/
A17/
TxD2
PA2/
A18/
RxD2
PA3/
A19/
SCK2
PC5/A5
PB6/
A14/
TIOCA5
PC3/A3
PB7/
PB3/
PB0/
A15/ PA0/A16
A11/
A8/
TIOCA3 TIOCD3 TIOCB5
PB1/A9/
PC2/A2 PC6/A6 TIOCB3
PE6/D6 PD1/D9 PD4/D12 PD7/D15 PC0/A0 PC1/A1 PC4/A4 PC7/A7
PB5/
PB4/
A13/
A12/
TIOCA4 TIOCB4
PB2/
A10/
TIOCC3
NC
INDEX
Figure 1.12 Pin Arrangement of H8S/2238 Group
(BP-112, BP-112V, TBP-112A, TBP-112AV: Top View, Only for HD64F2238R)
Rev. 5.00 Aug 08, 2006 page 15 of 982
REJ09B0054-0500
Section 1 Overview
(4) Pin Arrangement of H8S/2237 Group
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100BV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PB5/A13/TIOCB4
PB4/A12/TIOCA4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
VCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
P30/TxD0
P31/RxD0
P32/SCK0/IRQ4
P33/TxD1
P34/RxD1
P35/SCK1/IRQ5
P36
P77/TxD3
P76/RxD3
P75/SCK3
P74/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
PE2/D2
PE3/D3
PE4/D4
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
Figures 1.13 and 1.14 show the pin arrangement of the H8S/2237 Group.
Figure 1.13 Pin Arrangement of H8S/2237 Group
(TFP-100B, TFP-100BV, TFP-100G, TFP-100GV, FP-100B, FP-100BV: Top View)
Rev. 5.00 Aug 08, 2006 page 16 of 982
REJ09B0054-0500
FP-100A
FP-100AV
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P45/AN5
P46/AN6
P47/AN7
P96/DA0
P97/DA1
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19/SCK2
PA2/A18/RxD2
PA1/A17/TxD2
PA0/A16
PB7/A15/TIOCB5
PB6/A14/TIOCA5
PE2/D2
PE3/D3
PE4/D4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
VCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8/TIOCA3
PB1/A9/TIOCB3
PB2/A10/TIOCC3
PB3/A11/TIOCD3
PB4/A12/TIOCA4
PB5/A13/TIOCB4
P32/SCK0/IRQ4
P33/TxD1
P34/RxD1
P35/SCK1/IRQ5
P36
P77/TxD3
P76/RxD3
P75/SCK3
P74/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
P31/RxD0
P30/TxD0
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
P42/AN2
P43/AN3
P44/AN4
Section 1 Overview
Figure 1.14 Pin Arrangement of H8S/2237 Group (FP-100A, FP-100AV: Top View)
Rev. 5.00 Aug 08, 2006 page 17 of 982
REJ09B0054-0500
Section 1 Overview
(5) Pin Arrangement of H8S/2227 Group
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B*
FP-100BV*
(TOP VIEW)
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
P42/AN2
P43/AN3
P44/AN4
P45/AN5
P46/AN6
P47/AN7
P96
P97
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19
PA2/A18
PA1/A17
PA0/A16
PB7/A15
PB6/A14
PB5/A13
PB4/A12
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
VCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8
PB1/A9
PB2/A10
PB3/A11
P30/TxD0
P31/RxD0
P32/SCK0/IRQ4
P33/TxD1
P34/RxD1
P35/SCK1/IRQ5
P36
P77/TxD3
P76/RxD3
P75/SCK3
P74/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
PE2/D2
PE3/D3
PE4/D4
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
Figures 1.15 and 1.16 show the pin arrangement of the H8S/2227 Group.
Note: * Masked ROM version only.
Figure 1.15 Pin Arrangement of H8S/2227 Group
(TFP-100B, TFP-100BV, TFP-100G, TFP-100GV, FP-100B*, FP-100BV*: Top View)
Rev. 5.00 Aug 08, 2006 page 18 of 982
REJ09B0054-0500
FP-100A
FP-100AV
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
P45/AN5
P46/AN6
P47/AN7
P96
P97
AVSS
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P12/TIOCC0/TCLKA/A22
P11/TIOCB0/A21
P10/TIOCA0/A20
PA3/A19
PA2/A18
PA1/A17
PA0/A16
PB7/A15
PB6/A14
PE2/D2
PE3/D3
PE4/D4
PE5/D5
PE6/D6
PE7/D7
PD0/D8
PD1/D9
PD2/D10
PD3/D11
PD4/D12
PD5/D13
PD6/D14
PD7/D15
VCC
PC0/A0
VSS
PC1/A1
PC2/A2
PC3/A3
PC4/A4
PC5/A5
PC6/A6
PC7/A7
PB0/A8
PB1/A9
PB2/A10
PB3/A11
PB4/A12
PB5/A13
P32/SCK0/IRQ4
P33/TxD1
P34/RxD1
P35/SCK1/IRQ5
P36
P77/TxD3
P76/RxD3
P75/SCK3
P74/MRES
P73/TMO1/CS7
P72/TMO0/CS6
P71/CS5
P70/TMRI01/TMCI01/CS4
PG0/IRQ6
PG1/CS3/IRQ7
PG2/CS2
PG3/CS1
PG4/CS0
PE0/D0
PE1/D1
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
P31/RxD0
P30/TxD0
PF0/BREQ/IRQ2
PF1/BACK/BUZZ
PF2/WAIT
PF3/LWR/ADTRG/IRQ3
PF4/HWR
PF5/RD
PF6/AS
PF7/φ
MD2
FWE
EXTAL
VSS
XTAL
VCC
STBY
NMI
RES
OSC1
OSC2
MD1
MD0
AVCC
Vref
P40/AN0
P41/AN1
P42/AN2
P43/AN3
P44/AN4
Section 1 Overview
Figure 1.16 Pin Arrangement of H8S/2227 Group
(FP-100A, FP-100AV: Top View, Only for HD6432227)
Rev. 5.00 Aug 08, 2006 page 19 of 982
REJ09B0054-0500
Section 1 Overview
1.3.2
Pin Arrangements in Each Mode
Tables 1.1 to 1.5 show the pin arrangements in each mode.
Table 1.1
Pin Arrangements in Each Mode of H8S/2258 Group
Pin No.
Pin Name
TFP100B
FP100B
FP100A
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
1
4
PE5/D5
PE5/D5
PE5/D5
PE5
OE
2
5
PE6/D6
PE6/D6
PE6/D6
PE6
WE
3
6
PE7/D7
PE7/D7
PE7/D7
PE7
CE
4
7
D8
D8
D8
PD0
D0
5
8
D9
D9
D9
PD1
D1
6
9
D10
D10
D10
PD2
D2
7
10
D11
D11
D11
PD3
D3
8
11
D12
D12
D12
PD4
D4
9
12
D13
D13
D13
PD5
D5
10
13
D14
D14
D14
PD6
D6
11
14
D15
D15
D15
PD7
D7
12
15
CVCC
CVCC
CVCC
CVCC
VCC
13
16
A0
A0
PC0/A0
PC0
A0
14
17
VSS
VSS
VSS
VSS
VSS
15
18
A1
A1
PC1/A1
PC1
A1
16
19
A2
A2
PC2/A2
PC2
A2
17
20
A3
A3
PC3/A3
PC3
A3
18
21
A4
A4
PC4/A4
PC4
A4
19
22
A5
A5
PC5/A5
PC5
A5
20
23
A6
A6
PC6/A6
PC6
A6
21
24
A7
A7
PC7/A7
PC7
A7
22
25
PB0/A8/TIOCA3
PB0/A8/TIOCA3
PB0/A8/TIOCA3
PB0/TIOCA3
A8
23
26
PB1/A9/TIOCB3
PB1/A9/TIOCB3
PB1/A9/TIOCB3
PB1/TIOCB3
A9
24
27
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/TIOCC3
A10
25
28
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/TIOCD3
A11
Rev. 5.00 Aug 08, 2006 page 20 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP100B
FP100B
FP100A
26
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
29
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/TIOCA4
A12
27
30
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/TIOCB4
A13
28
31
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/TIOCA5
A14
29
32
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/TIOCB5
A15
30
33
PA0/A16
PA0/A16
PA0/A16
PA0
A16
31
34
PA1/A17/TxD2
PA1/A17/TxD2
PA1/A17/TxD2
PA1/TxD2
A17
32
35
PA2/A18/RxD2
PA2/A18/RxD2
PA2/A18/RxD2
PA2/RxD2
A18
33
36
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/SCK2
NC
34
37
P10/TIOCA0/
A20
P10/TIOCA0/
A20
P10/TIOCA0/
A20
P10/TIOCA0
NC
35
38
P11/TIOCB0/
A21
P11/TIOCB0/
A21
P11/TIOCB0/
A21
P11/TIOCB0
NC
36
39
P12/TIOCC0/
TCLKA/A22
P12/TIOCC0/
TCLKA/A22
P12/TIOCC0/
TCLKA/A22
P12/TIOCC0/
TCLKA
NC
37
40
P13/TIOCD0/
TCLKB/A23
P13/TIOCD0/
TCLKB/A23
P13/TIOCD0/
TCLKB/A23
P13/TIOCD0/
TCLKB
NC
38
41
P14/TIOCA1/
IRQ0
P14/TIOCA1/
IRQ0
P14/TIOCA1/
IRQ0
P14/TIOCA1/
IRQ0
VSS
39
42
P15/TIOCB1/
TCLKC
P15/TIOCB1/
TCLKC
P15/TIOCB1/
TCLKC
P15/TIOCB1/
TCLKC
NC
40
43
P16/TIOCA2/
IRQ1
P16/TIOCA2/
IRQ1
P16/TIOCA2/
IRQ1
P16/TIOCA2/
IRQ1
VSS
41
44
P17/TIOCB2/
TCLKD
P17/TIOCB2/
TCLKD
P17/TIOCB2/
TCLKD
P17/TIOCB2/
TCLKD
NC
42
45
AVSS
AVSS
AVSS
AVSS
VSS
43
46
P97/DA1
P97/DA1
P97/DA1
P97/DA1
NC
44
47
P96/DA0
P96/DA0
P96/DA0
P96/DA0
NC
45
48
P47/AN7
P47/AN7
P47/AN7
P47/AN7
NC
46
49
P46/AN6
P46/AN6
P46/AN6
P46/AN6
NC
47
50
P45/AN5
P45/AN5
P45/AN5
P45/AN5
NC
48
51
P44/AN4
P44/AN4
P44/AN4
P44/AN4
NC
Rev. 5.00 Aug 08, 2006 page 21 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP100B
FP100B
FP100A
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
49
52
P43/AN3
P43/AN3
P43/AN3
P43/AN3
NC
50
53
P42/AN2
P42/AN2
P42/AN2
P42/AN2
NC
51
54
P41/AN1
P41/AN1
P41/AN1
P41/AN1
NC
52
55
P40/AN0
P40/AN0
P40/AN0
P40/AN0
NC
53
56
Vref
Vref
Vref
Vref
VCC
54
57
AVCC
AVCC
AVCC
AVCC
VCC
55
58
MD0
MD0
MD0
MD0
VSS
56
59
MD1
MD1
MD1
MD1
VSS
57
60
OSC2
OSC2
OSC2
OSC2
NC
58
61
OSC1
OSC1
OSC1
OSC1
VSS
59
62
RES
RES
RES
RES
RES
60
63
NMI
NMI
NMI
NMI
VCC
61
64
STBY
STBY
STBY
STBY
VCC
62
65
VCC
VCC
VCC
VCC
VCC
63
66
XTAL
XTAL
XTAL
XTAL
XTAL
64
67
VSS
VSS
VSS
VSS
VSS
65
68
EXTAL
EXTAL
EXTAL
EXTAL
EXTAL
66
69
FWE
FWE
FWE
FWE
FWE
67
70
MD2
MD2
MD2
MD2
VSS
68
71
PF7/φ
PF7/φ
PF7/φ
PF7/φ
NC
69
72
AS
AS
AS
PF6
NC
70
73
RD
RD
RD
PF5
NC
71
74
HWR
HWR
HWR
PF4
NC
72
75
PF3/LWR/
ADTRG/IRQ3
PF3/LWR/
ADTRG/IRQ3
PF3/LWR/
ADTRG/IRQ3
PF3/ADTRG/
IRQ3
NC
73
76
PF2/WAIT
PF2/WAIT
PF2/WAIT
PF2
NC
74
77
PF1/BACK/
BUZZ
PF1/BACK/
BUZZ
PF1/BACK/
BUZZ
PF1/BUZZ
NC
75
78
PF0/BREQ/
IRQ2
PF0/BREQ/
IRQ2
PF0/BREQ/
IRQ2
PF0/IRQ2
VCC
76
79
P30/TxD0
P30/TxD0
P30/TxD0
P30/TxD0
NC
77
80
P31/RxD0
P31/RxD0
P31/RxD0
P31/RxD0
NC
Rev. 5.00 Aug 08, 2006 page 22 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP100B
FP100B
FP100A
78
Flash Memory
Programmable
Mode
Mode 4
Mode 5
Mode 6
Mode 7
81
P32/SCK0/
SDA1/IRQ4
P32/SCK0/
SDA1/IRQ4
P32/SCK0/
SDA1/IRQ4
P32/SCK0/
SDA1/IRQ4
NC
79
82
P33/TxD1/
SCL1
P33/TxD1/
SCL1
P33/TxD1/
SCL1
P33/TxD1/
SCL1
NC
80
83
P34/RxD1/
SDA0
P34/RxD1/
SDA0
P34/RxD1/
SDA0
P34/RxD1/
SDA0
NC
81
84
P35/SCK1/
SCL0/IRQ5
P35/SCK1/
SCL0/IRQ5
P35/SCK1/
SCL0/IRQ5
P35/SCK1/
SCL0/IRQ5
NC
82
85
P36
P36
P36
P36
NC
83
86
P77/TxD3
P77/TxD3
P77/TxD3
P77/TxD3
NC
84
87
P76/RxD3
P76/RxD3
P76/RxD3
P76/RxD3
NC
85
88
P75/TMO3/
SCK3
P75/TMO3/
SCK3
P75/TMO3/
SCK3
P75/TMO3/
SCK3
NC
86
89
P74/TMO2/
MRES
P74/TMO2/
MRES
P74/TMO2/
MRES
P74/TMO2/
MRES
NC
87
90
P73/TMO1/CS7
P73/TMO1/CS7
P73/TMO1/CS7
P73/TMO1
NC
88
91
P72/TMO0/CS6
P72/TMO0/CS6
P72/TMO0/CS6
P72/TMO0
NC
89
92
P71/TMRI23/
TMCI23/CS5
P71/TMRI23/
TMCI23/CS5
P71/TMRI23/
TMCI23/CS5
P71/TMRI23/
TMCI23
NC
90
93
P70/TMRI01/
TMCI01/CS4
P70/TMRI01/
TMCI01/CS4
P70/TMRI01/
TMCI01/CS4
P70/TMRI01/
TMCI01
NC
91
94
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
NC
92
95
PG1/CS3/IRQ7
PG1/CS3/IRQ7
PG1/CS3/IRQ7
PG1/IRQ7
NC
93
96
PG2/Tx/CS2
PG2/Tx/CS2
PG2/Tx/CS2
PG2/Tx
NC
94
97
PG3/Rx/CS1
PG3/Rx/CS1
PG3/Rx/CS1
PG3/Rx
NC
95
98
PG4/CS0
PG4/CS0
PG4/CS0
PG4
NC
96
99
PE0/D0
PE0/D0
PE0/D0
PE0
NC
97
100
PE1/D1
PE1/D1
PE1/D1
PE1
NC
98
1
PE2/D2
PE2/D2
PE2/D2
PE2
NC
99
2
PE3/D3
PE3/D3
PE3/D3
PE3
VCC
100
3
PE4/D4
PE4/D4
PE4/D4
PE4
VSS
Rev. 5.00 Aug 08, 2006 page 23 of 982
REJ09B0054-0500
Section 1 Overview
Table 1.2
Pin Arrangements in Each Mode of H8S/2239 Group
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
TBP-112A*
FP-100BV
TBP-112AV*
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
1
B2
PE5/D5
PE5/D5
PE5/D5
PE5
OE
2
B1
PE6/D6
PE6/D6
PE6/D6
PE6
WE
3
D4
PE7/D7
PE7/D7
PE7/D7
PE7
CE
4
C2
D8
D8
D8
PD0
D0
5
C1
D9
D9
D9
PD1
D1
6
D3
D10
D10
D10
PD2
D2
7
D2
D11
D11
D11
PD3
D3
8
D1
D12
D12
D12
PD4
D4
9
E4
D13
D13
D13
PD5
D5
10
E3
D14
D14
D14
PD6
D6
11
E1
D15
D15
D15
PD7
D7
12
E2, F3
CVCC
CVCC
CVCC
CVCC
VCC
13
F1
A0
A0
PC0/A0
PC0
A0
14
F2, F4
VSS
VSS
VSS
VSS
VSS
15
G1
A1
A1
PC1/A1
PC1
A1
16
G2
A2
A2
PC2/A2
PC2
A2
17
G3
A3
A3
PC3/A3
PC3
A3
18
H1
A4
A4
PC4/A4
PC4
A4
19
G4
A5
A5
PC5/A5
PC5
A5
20
H2
A6
A6
PC6/A6
PC6
A6
21
J1
A7
A7
PC7/A7
PC7
A7
22
H3
PB0/A8/
TIOCA3
PB0/A8/
TIOCA3
PB0/A8/
TIOCA3
PB0/TIOCA3
A8
23
J2
PB1/A9/
TIOCB3
PB1/A9/
TIOCB3
PB1/A9/
TIOCB3
PB1/TIOCB3
A9
24
K1
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/TIOCC3
A10
25
J3
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/TIOCD3
A11
26
K2
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/TIOCA4
A12
Rev. 5.00 Aug 08, 2006 page 24 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
TBP-112A*
FP-100BV
TBP-112AV*
Pin Name
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
27
L2
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/TIOCB4
A13
28
H4
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/TIOCA5
A14
29
K3
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/TIOCB5
A15
30
L3
PA0/A16
PA0/A16
PA0/A16
PA0
A16
31
J4
PA1/A17/
TxD2
PA1/A17/
TxD2
PA1/A17/
TxD2
PA1/TxD2
A17
32
K4
PA2/A18/
RxD2
PA2/A18/
RxD2
PA2/A18/
RxD2
PA2/RxD2
A18
33
L4
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/SCK2
NC
34
H5
P10/TIOCA0/
DACK0/A20
P10/TIOCA0/
DACK0/A20
P10/TIOCA0/
DACK0/A20
P10/TIOCA0/
DACK0
NC
35
J5
P11/TIOCB0/
DACK1/A21
P11/TIOCB0/
DACK1/A21
P11/TIOCB0/
DACK1/A21
P11/TIOCB0/
DACK1
NC
36
L5
P12/TIOCC0/
TCLKA/A22
P12/TIOCC0/
TCLKA/A22
P12/TIOCC0/
TCLKA/A22
P12/TIOCC0/
TCLKA
NC
37
K5
P13/TIOCD0/
TCLKB/A23
P13/TIOCD0/
TCLKB/A23
P13/TIOCD0/
TCLKB/A23
P13/TIOCD0/
TCLKB
NC
38
J6
P14/TIOCA1/
IRQ0
P14/TIOCA1/
IRQ0
P14/TIOCA1/
IRQ0
P14/TIOCA1/
IRQ0
VSS
39
L6
P15/TIOCB1/
TCLKC
P15/TIOCB1/
TCLKC
P15/TIOCB1/
TCLKC
P15/TIOCB1/
TCLKC
NC
40
K6
P16/TIOCA2/
IRQ1
P16/TIOCA2/
IRQ1
P16/TIOCA2/
IRQ1
P16/TIOCA2/
IRQ1
VSS
41
H6
P17/TIOCB2/
TCLKD
P17/TIOCB2/
TCLKD
P17/TIOCB2/
TCLKD
P17/TIOCB2/
TCLKD
NC
42
K7, L7
AVSS
AVSS
AVSS
AVSS
VSS
43
J7
P97/DA1
P97/DA1
P97/DA1
P97/DA1
NC
44
L8
P96/DA0
P96/DA0
P96/DA0
P96/DA0
NC
45
H7
P47/AN7
P47/AN7
P47/AN7
P47/AN7
NC
46
K8
P46/AN6
P46/AN6
P46/AN6
P46/AN6
NC
47
L9
P45/AN5
P45/AN5
P45/AN5
P45/AN5
NC
Rev. 5.00 Aug 08, 2006 page 25 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
TBP-112A*
FP-100BV
TBP-112AV*
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
48
J8
P44/AN4
P44/AN4
P44/AN4
P44/AN4
NC
49
K9
P43/AN3
P43/AN3
P43/AN3
P43/AN3
NC
50
L10
P42/AN2
P42/AN2
P42/AN2
P42/AN2
NC
51
K10
P41/AN1
P41/AN1
P41/AN1
P41/AN1
NC
52
K11
P40/AN0
P40/AN0
P40/AN0
P40/AN0
NC
53
H8
Vref
Vref
Vref
Vref
VCC
54
J10
AVCC
AVCC
AVCC
AVCC
VCC
55
J11
MD0
MD0
MD0
MD0
VSS
56
H9
MD1
MD1
MD1
MD1
VSS
57
H10
OSC2
OSC2
OSC2
OSC2
NC
58
H11
OSC1
OSC1
OSC1
OSC1
VSS
59
G8
RES
RES
RES
RES
RES
60
G9
NMI
NMI
NMI
NMI
VCC
61
G11
STBY
STBY
STBY
STBY
VCC
62
F9, G10
VCC
VCC
VCC
VCC
VCC
63
F11
XTAL
XTAL
XTAL
XTAL
XTAL
64
F8, F10
VSS
VSS
VSS
VSS
VSS
65
E11
EXTAL
EXTAL
EXTAL
EXTAL
EXTAL
66
E10
FWE
FWE
FWE
FWE
FWE
67
E9
MD2
MD2
MD2
MD2
VSS
68
D11
PF7/φ
PF7/φ
PF7/φ
PF7/φ
NC
69
E8
AS
AS
AS
PF6
NC
70
D10
RD
RD
RD
PF5
NC
71
C11
HWR
HWR
HWR
PF4
NC
72
D9
PF3/LWR/
ADTRG/
IRQ3
PF3/LWR/
ADTRG/
IRQ3
PF3/LWR/
ADTRG/
IRQ3
PF3/
ADTRG/
IRQ3
NC
73
C10
PF2/WAIT
PF2/WAIT
PF2/WAIT
PF2
NC
74
B11
PF1/BACK/
BUZZ
PF1/BACK/
BUZZ
PF1/BACK/
BUZZ
PF1/BUZZ
NC
75
C9
PF0/BREQ/
IRQ2
PF0/BREQ/
IRQ2
PF0/BREQ/
IRQ2
PF0/IRQ2
VCC
Rev. 5.00 Aug 08, 2006 page 26 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
TBP-112A*
FP-100BV
TBP-112AV*
Pin Name
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
76
A10
P30/TxD0
P30/TxD0
P30/TxD0
P30/TxD0
NC
77
D8
P31/RxD0
P31/RxD0
P31/RxD0
P31/RxD0
NC
78
B9
P32/SCK0/
SDA1/IRQ4
P32/SCK0/
SDA1/IRQ4
P32/SCK0/
SDA1/IRQ4
P32/SCK0/
SDA1/IRQ4
NC
79
A9
P33/TxD1/
SCL1
P33/TxD1/
SCL1
P33/TxD1/
SCL1
P33/TxD1/
SCL1
NC
80
C8
P34/RxD1/
SDA0
P34/RxD1/
SDA0
P34/RxD1/
SDA0
P34/RxD1/
SDA0
NC
81
B8
P35/SCK1/
SCL0/IRQ5
P35/SCK1/
SCL0/IRQ5
P35/SCK1/
SCL0/IRQ5
P35/SCK1/
SCL0/IRQ5
NC
82
A8
P36
P36
P36
P36
NC
83
D7
P77/TxD3
P77/TxD3
P77/TxD3
P77/TxD3
NC
84
C7
P76/RxD3
P76/RxD3
P76/RxD3
P76/RxD3
NC
85
A7
P75/TMO3/
SCK3
P75/TMO3/
SCK3
P75/TMO3/
SCK3
P75/TMO3/
SCK3
NC
86
B7
P74/TMO2/
MRES
P74/TMO2/
MRES
P74/TMO2/
MRES
P74/TMO2/
MRES
NC
87
C6
P73/TMO1/
TEND1/CS7
P73/TMO1/
TEND1/CS7
P73/TMO1/
TEND1/CS7
P73/TMO1/
TEND1
NC
88
A6
P72/TMO0/
TEND0/CS6
P72/TMO0/
TEND0/CS6
P72/TMO0/
TEND0/CS6
P72/TMO0/
TEND0
NC
89
B6
P71/TMRI23/
TMCI23/
DREQ1/CS5
P71/TMRI23/
TMCI23/
DREQ1/CS5
P71/TMRI23/
TMCI23/
DREQ1/CS5
P71/TMRI23/
TMCI23/
DREQ1
NC
90
D6
P70/TMRI01/
TMCI01/
DREQ0/CS4
P70/TMRI01/
TMCI01/
DREQ0/CS4
P70/TMRI01/
TMCI01/
DREQ0/CS4
P70/TMRI01/
TMCI01/
DREQ0
NC
91
A5
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
NC
92
B5
PG1/CS3/
IRQ7
PG1/CS3/
IRQ7
PG1/CS3/
IRQ7
PG1/IRQ7
NC
93
C5
PG2/CS2
PG2/CS2
PG2/CS2
PG2
NC
94
A4
PG3/CS1
PG3/CS1
PG3/CS1
PG3
NC
95
D5
PG4/CS0
PG4/CS0
PG4/CS0
PG4
NC
96
B4
PE0/D0
PE0/D0
PE0/D0
PE0
NC
97
A3
PE1/D1
PE1/D1
PE1/D1
PE1
NC
Rev. 5.00 Aug 08, 2006 page 27 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
TBP-112A*
FP-100BV
TBP-112AV*
Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
98
C4
PE2/D2
PE2/D2
PE2/D2
PE2
NC
99
B3
PE3/D3
PE3/D3
PE3/D3
PE3
VCC
100
A2
PE4/D4
PE4/D4
PE4/D4
PE4
VSS
Note:
*
Supported only by HD64F2239.
Rev. 5.00 Aug 08, 2006 page 28 of 982
REJ09B0054-0500
Section 1 Overview
Table 1.3
Pin Arrangements in Each Mode of H8S/2238 Group
Pin No.
Pin Name
TFP-100B
TFP-100BV
BP-112*2
TFP-100G
BP-112V*2
TFP-100GV
TBP-112A*2
FP-100B
FP-100A*1 TBPFP-100BV
Mode 4
FP-100AV*1 112AV*2
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
1
4
B2
PE5/D5
PE5/D5
PE5/D5
PE5
OE
2
5
B1
PE6/D6
PE6/D6
PE6/D6
PE6
WE
3
6
D4
PE7/D7
PE7/D7
PE7/D7
PE7
CE
4
7
C2
D8
D8
D8
PD0
D0
5
8
C1
D9
D9
D9
PD1
D1
6
9
D3
D10
D10
D10
PD2
D2
7
10
D2
D11
D11
D11
PD3
D3
8
11
D1
D12
D12
D12
PD4
D4
9
12
E4
D13
D13
D13
PD5
D5
10
13
E3
D14
D14
D14
PD6
D6
11
14
E1
D15
D15
D15
PD7
D7
12
15
E2, F3
CVCC
CVCC
CVCC
CVCC
VCC
13
16
F1
A0
A0
PC0/A0
PC0
A0
14
17
F2, F4
VSS
VSS
VSS
VSS
VSS
15
18
G1
A1
A1
PC1/A1
PC1
A1
16
19
G2
A2
A2
PC2/A2
PC2
A2
17
20
G3
A3
A3
PC3/A3
PC3
A3
18
21
H1
A4
A4
PC4/A4
PC4
A4
19
22
G4
A5
A5
PC5/A5
PC5
A5
20
23
H2
A6
A6
PC6/A6
PC6
A6
21
24
J1
A7
A7
PC7/A7
PC7
A7
22
25
H3
PB0/A8/
TIOCA3
PB0/A8/
TIOCA3
PB0/A8/
TIOCA3
PB0/
TIOCA3
A8
23
26
J2
PB1/A9/
TIOCB3
PB1/A9/
TIOCB3
PB1/A9/
TIOCB3
PB1/
TIOCB3
A9
24
27
K1
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/
TIOCC3
A10
25
28
J3
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/
TIOCD3
A11
26
29
K2
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/
TIOCA4
A12
Rev. 5.00 Aug 08, 2006 page 29 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A*1
FP-100BV
FP-100AV*1
BP-112*2
BP-112V*2
TBP-112A*2
TBPMode 4
112AV*2
27
30
L2
28
31
29
Flash Memory
Programmable
Mode
Mode 5
Mode 6
Mode 7
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/
TIOCB4
A13
H4
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/
TIOCA5
A14
32
K3
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/
TIOCB5
A15
30
33
L3
PA0/A16
PA0/A16
PA0/A16
PA0
A16
31
34
J4
PA1/A17/
TxD2
PA1/A17/
TxD2
PA1/A17/
TxD2
PA1/TxD2
A17
32
35
K4
PA2/A18/
RxD2
PA2/A18/
RxD2
PA2/A18/
RxD2
PA2/
RxD2
A18
33
36
L4
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/
SCK2
NC
34
37
H5
P10/
TIOCA0/
A20
P10/
TIOCA0/
A20
P10/
TIOCA0/
A20
P10/
TIOCA0
NC
35
38
J5
P11/
TIOCB0/
A21
P11/
TIOCB0/
A21
P11/
TIOCB0/
A21
P11/
TIOCB0
NC
36
39
L5
P12/
P12/
P12/
P12/
TIOCC0/
TIOCC0/
TIOCC0/
TIOCC0/
TCLKA/A22 TCLKA/A22 TCLKA/A22 TCLKA
NC
37
40
K5
P13/
P13/
P13/
P13/
TIOCD0/
TIOCD0/
TIOCD0/
TIOCD0/
TCLKB/A23 TCLKB/A23 TCLKB/A23 TCLKB
NC
38
41
J6
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
VSS
39
42
L6
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
NC
40
43
K6
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
VSS
41
44
H6
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
NC
Rev. 5.00 Aug 08, 2006 page 30 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A*1
FP-100BV
FP-100AV*1
BP-112*2
BP-112V*2
TBP-112A*2
TBPMode 4
112AV*2
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
42
45
K7, L7
AVSS
AVSS
AVSS
VSS
43
46
J7
P97/DA1
P97/DA1
P97/DA1
P97/DA1
NC
44
47
L8
P96/DA0
P96/DA0
P96/DA0
P96/DA0
NC
45
48
H7
P47/AN7
P47/AN7
P47/AN7
P47/AN7
NC
46
49
K8
P46/AN6
P46/AN6
P46/AN6
P46/AN6
NC
47
50
L9
P45/AN5
P45/AN5
P45/AN5
P45/AN5
NC
48
51
J8
P44/AN4
P44/AN4
P44/AN4
P44/AN4
NC
49
52
K9
P43/AN3
P43/AN3
P43/AN3
P43/AN3
NC
50
53
L10
P42/AN2
P42/AN2
P42/AN2
P42/AN2
NC
51
54
K10
P41/AN1
P41/AN1
P41/AN1
P41/AN1
NC
52
55
K11
P40/AN0
P40/AN0
P40/AN0
P40/AN0
NC
53
56
H8
Vref
Vref
Vref
Vref
VCC
AVSS
54
57
J10
AVCC
AVCC
AVCC
AVCC
VCC
55
58
J11
MD0
MD0
MD0
MD0
VSS
56
59
H9
MD1
MD1
MD1
MD1
VSS
57
60
H10
OSC2
OSC2
OSC2
OSC2
NC
58
61
H11
OSC1
OSC1
OSC1
OSC1
VSS
59
62
G8
RES
RES
RES
RES
RES
60
63
G9
NMI
NMI
NMI
NMI
VCC
61
64
G11
STBY
STBY
STBY
STBY
VCC
62
65
F9, G10
VCC
VCC
VCC
VCC
VCC
63
66
F11
XTAL
XTAL
XTAL
XTAL
XTAL
64
67
F8, F10
VSS
VSS
VSS
VSS
VSS
65
68
E11
EXTAL
EXTAL
EXTAL
EXTAL
EXTAL
66
69
E10
FWE
FWE
FWE
FWE
FWE
67
70
E9
MD2
MD2
MD2
MD2
VSS
68
71
D11
PF7/φ
PF7/φ
PF7/φ
PF7/φ
NC
69
72
E8
AS
AS
AS
PF6
NC
70
73
D10
RD
RD
RD
PF5
NC
71
74
C11
HWR
HWR
HWR
PF4
NC
Rev. 5.00 Aug 08, 2006 page 31 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A*1
FP-100BV
FP-100AV*1
BP-112*2
BP-112V*2
TBP-112A*2
TBPMode 4
112AV*2
72
75
D9
73
76
74
Flash Memory
Programmable
Mode
Mode 5
Mode 6
Mode 7
PF3/
LWR/
ADTRG/
IRQ3
PF3/
LWR/
ADTRG/
IRQ3
PF3/
LWR/
ADTRG/
IRQ3
PF3/
ADTRG/
IRQ3
NC*3
C10
PF2/
WAIT
PF2/
WAIT
PF2/
WAIT
PF2
NC
77
B11
PF1/
BACK/
BUZZ
PF1/
BACK/
BUZZ
PF1/
BACK/
BUZZ
PF1/
BUZZ
NC
75
78
C9
PF0/
BREQ/
IRQ2
PF0/
BREQ/
IRQ2
PF0/
BREQ/
IRQ2
PF0/
IRQ2
VCC
76
79
A10
P30/
TxD0
P30/
TxD0
P30/
TxD0
P30/
TxD0
NC
77
80
D8
P31/
RxD0
P31/
RxD0
P31/
RxD0
P31/
RxD0
NC
78
81
B9
P32/
SCK0/
SDA1/
IRQ4
P32/
SCK0/
SDA1/
IRQ4
P32/
SCK0/
SDA1/
IRQ4
P32/
SCK0/
SDA1/
IRQ4
NC
79
82
A9
P33/
TxD1/
SCL1
P33/
TxD1/
SCL1
P33/
TxD1/
SCL1
P33/
TxD1/
SCL1
NC
80
83
C8
P34/
RxD1/
SDA0
P34/
RxD1/
SDA0
P34/
RxD1/
SDA0
P34/
RxD1/
SDA0
NC
81
84
B8
P35/
SCK1/
SCL0/
IRQ5
P35/
SCK1/
SCL0/
IRQ5
P35/
SCK1/
SCL0/
IRQ5
P35/
SCK1/
SCL0/
IRQ5
NC
82
85
A8
P36
P36
P36
P36
NC
83
86
D7
P77/
TxD3
P77/
TxD3
P77/
TxD3
P77/
TxD3
NC
84
87
C7
P76/
RxD3
P76/
RxD3
P76/
RxD3
P76/
RxD3
NC
Rev. 5.00 Aug 08, 2006 page 32 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A*1
FP-100BV
FP-100AV*1
BP-112*2
BP-112V*2
TBP-112A*2
TBPMode 4
112AV*2
85
88
A7
86
89
87
Flash Memory
Programmable
Mode
Mode 5
Mode 6
Mode 7
P75/
TMO3/
SCK3
P75/
TMO3/
SCK3
P75/
TMO3/
SCK3
P75/
TMO3/
SCK3
NC
B7
P74/
TMO2/
MRES
P74/
TMO2/
MRES
P74/
TMO2/
MRES
P74/
TMO2/
MRES
NC
90
C6
P73/
TMO1/
CS7
P73/
TMO1/
CS7
P73/
TMO1/
CS7
P73/
TMO1
NC
88
91
A6
P72/
TMO0/
CS6
P72/
TMO0/
CS6
P72/
TMO0/
CS6
P72/
TMO0
NC
89
92
B6
P71/
TMRI23/
TMCI23/
CS5
P71/
TMRI23/
TMCI23/
CS5
P71/
TMRI23/
TMCI23/
CS5
P71/
TMRI23/
TMCI23
NC
90
93
D6
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01
NC
91
94
A5
PG0/
IRQ6
PG0/
IRQ6
PG0/
IRQ6
PG0/
IRQ6
NC
92
95
B5
PG1/
CS3/
IRQ7
PG1/
CS3/
IRQ7
PG1/
CS3/
IRQ7
PG1/
IRQ7
NC
93
96
C5
PG2/CS2
PG2/CS2
PG2/CS2
PG2
NC
94
97
A4
PG3/CS1
PG3/CS1
PG3/CS1
PG3
NC
95
98
D5
PG4/CS0
PG4/CS0
PG4/CS0
PG4
NC
96
99
B4
PE0/D0
PE0/D0
PE0/D0
PE0
NC
97
100
A3
PE1/D1
PE1/D1
PE1/D1
PE1
NC
98
1
C4
PE2/D2
PE2/D2
PE2/D2
PE2
NC
99
2
B3
PE3/D3
PE3/D3
PE3/D3
PE3
VCC
100
3
A2
PE4/D4
PE4/D4
PE4/D4
PE4
VSS
Notes: 1. Supported only by the H8S/2238B and H8S/2236B.
2. Supported only by the HD64F2238R.
3. Vcc in the H8S/2238B and H8S/2236B.
Rev. 5.00 Aug 08, 2006 page 33 of 982
REJ09B0054-0500
Section 1 Overview
Table 1.4
Pin Arrangements in Each Mode of H8S/2237 Group
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A
FP-100BV
FP-100AV Mode 4
Mode 5
Mode 6
Mode 7
PROM
Mode
1
4
PE5/D5
PE5/D5
PE5/D5
PE5
NC
2
5
PE6/D6
PE6/D6
PE6/D6
PE6
NC
3
6
PE7/D7
PE7/D7
PE7/D7
PE7
NC
4
7
D8
D8
D8
PD0
D0
5
8
D9
D9
D9
PD1
D1
6
9
D10
D10
D10
PD2
D2
7
10
D11
D11
D11
PD3
D3
8
11
D12
D12
D12
PD4
D4
9
12
D13
D13
D13
PD5
D5
10
13
D14
D14
D14
PD6
D6
11
14
D15
D15
D15
PD7
D7
12
15
VCC
VCC
VCC
VCC
VCC
13
16
A0
A0
PC0/A0
PC0
A0
14
17
VSS
VSS
VSS
VSS
VSS
15
18
A1
A1
PC1/A1
PC1
A1
16
19
A2
A2
PC2/A2
PC2
A2
17
20
A3
A3
PC3/A3
PC3
A3
18
21
A4
A4
PC4/A4
PC4
A4
19
22
A5
A5
PC5/A5
PC5
A5
20
23
A6
A6
PC6/A6
PC6
A6
21
24
A7
A7
PC7/A7
PC7
A7
22
25
PB0/A8/
TIOCA3
PB0/A8/
TIOCA3
PB0/A8/
TIOCA3
PB0/
TIOCA3
A8
23
26
PB1/A9/
TIOCB3
PB1/A9/
TIOCB3
PB1/A9/
TIOCB3
PB1/
TIOCB3
OE
24
27
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/A10/
TIOCC3
PB2/
TIOCC3
A10
Rev. 5.00 Aug 08, 2006 page 34 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A
FP-100BV
FP-100AV Mode 4
Mode 5
Mode 6
Mode 7
PROM
Mode
25
28
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/A11/
TIOCD3
PB3/
TIOCD3
A11
26
29
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/A12/
TIOCA4
PB4/
TIOCA4
A12
27
30
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/A13/
TIOCB4
PB5/
TIOCB4
A13
28
31
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/A14/
TIOCA5
PB6/
TIOCA5
A14
29
32
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/A15/
TIOCB5
PB7/
TIOCB5
A15
30
33
PA0/A16
PA0/A16
PA0/A16
PA0
A16
31
34
PA1/A17/
TxD2
PA1/A17/
TxD2
PA1/A17/
TxD2
PA1/TxD2
VCC
32
35
PA2/A18/
RxD2
PA2/A18/
RxD2
PA2/A18/
RxD2
PA2/RxD2
VCC
33
36
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/A19/
SCK2
PA3/SCK2
NC
34
37
P10/
TIOCA0/A20
P10/
TIOCA0/A20
P10/
TIOCA0/A20
P10/
TIOCA0
NC
35
38
P11/
TIOCB0/A21
P11/
TIOCB0/A21
P11/
TIOCB0/A21
P11/
TIOCB0
NC
36
39
P12/
TIOCC0/
TCLKA/A22
P12/
TIOCC0/
TCLKA/A22
P12/
TIOCC0/
TCLKA/A22
P12/
TIOCC0/
TCLKA
NC
37
40
P13/
TIOCD0/
TCLKB/A23
P13/
TIOCD0/
TCLKB/A23
P13/
TIOCD0/
TCLKB/A23
P13/
TIOCD0/
TCLKB
NC
38
41
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
NC
39
42
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
NC
Rev. 5.00 Aug 08, 2006 page 35 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A
FP-100BV
FP-100AV Mode 4
Mode 5
Mode 6
Mode 7
PROM
Mode
40
43
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
NC
41
44
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
NC
42
45
AVSS
AVSS
AVSS
AVSS
VSS
43
46
P97/DA1
P97/DA1
P97/DA1
P97/DA1
NC
44
47
P96/DA0
P96/DA0
P96/DA0
P96/DA0
NC
45
48
P47/AN7
P47/AN7
P47/AN7
P47/AN7
NC
46
49
P46/AN6
P46/AN6
P46/AN6
P46/AN6
NC
47
50
P45/AN5
P45/AN5
P45/AN5
P45/AN5
NC
48
51
P44/AN4
P44/AN4
P44/AN4
P44/AN4
NC
49
52
P43/AN3
P43/AN3
P43/AN3
P43/AN3
NC
50
53
P42/AN2
P42/AN2
P42/AN2
P42/AN2
NC
51
54
P41/AN1
P41/AN1
P41/AN1
P41/AN1
NC
52
55
P40/AN0
P40/AN0
P40/AN0
P40/AN0
NC
53
56
Vref
Vref
Vref
Vref
VCC
54
57
AVCC
AVCC
AVCC
AVCC
VCC
55
58
MD0
MD0
MD0
MD0
VSS
56
59
MD1
MD1
MD1
MD1
VSS
57
60
OSC2
OSC2
OSC2
OSC2
NC
58
61
OSC1
OSC1
OSC1
OSC1
NC
59
62
RES
RES
RES
RES
VPP
60
63
NMI
NMI
NMI
NMI
A9
61
64
STBY
STBY
STBY
STBY
VSS
62
65
VCC
VCC
VCC
VCC
VCC
63
66
XTAL
XTAL
XTAL
XTAL
NC
64
67
VSS
VSS
VSS
VSS
VSS
65
68
EXTAL
EXTAL
EXTAL
EXTAL
NC
Rev. 5.00 Aug 08, 2006 page 36 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A
FP-100BV
FP-100AV Mode 4
Mode 5
Mode 6
Mode 7
PROM
Mode
66
69
FWE
FWE
FWE
FWE
NC
67
70
MD2
MD2
MD2
MD2
VSS
68
71
PF7/φ
PF7/φ
PF7/φ
PF7/φ
NC
69
72
AS
AS
AS
PF6
NC
70
73
RD
RD
RD
PF5
NC
71
74
HWR
HWR
HWR
PF4
NC
72
75
PF3/LWR/
ADTRG/
IRQ3
PF3/LWR/
ADTRG/
IRQ3
PF3/LWR/
ADTRG/
IRQ3
PF3/ADTRG/
IRQ3
NC
73
76
PF2/WAIT
PF2/WAIT
PF2/WAIT
PF2
CE
74
77
PF1/BACK/
BUZZ
PF1/BACK/
BUZZ
PF1/BACK/
BUZZ
PF1/BUZZ
PGM
75
78
PF0/BREQ/
IRQ2
PF0/BREQ/
IRQ2
PF0/BREQ/
IRQ2
PF0/IRQ2
NC
76
79
P30/TxD0
P30/TxD0
P30/TxD0
P30/TxD0
NC
77
80
P31/RxD0
P31/RxD0
P31/RxD0
P31/RxD0
NC
78
81
P32/SCK0/
IRQ4
P32/SCK0/
IRQ4
P32/SCK0/
IRQ4
P32/SCK0/
IRQ4
NC
79
82
P33/TxD1
P33/TxD1
P33/TxD1
P33/TxD1
NC
80
83
P34/RxD1
P34/RxD1
P34/RxD1
P34/RxD1
NC
81
84
P35/SCK1/
IRQ5
P35/SCK1/
IRQ5
P35/SCK1/
IRQ5
P35/SCK1/
IRQ5
NC
82
85
P36
P36
P36
P36
NC
83
86
P77/TxD3
P77/TxD3
P77/TxD3
P77/TxD3
NC
84
87
P76/RxD3
P76/RxD3
P76/RxD3
P76/RxD3
NC
85
88
P75/SCK3
P75/SCK3
P75/SCK3
P75/SCK3
NC
86
89
P74/MRES
P74/MRES
P74/MRES
P74/MRES
NC
87
90
P73/TMO1/
CS7
P73/TMO1/
CS7
P73/TMO1/
CS7
P73/TMO1
NC
Rev. 5.00 Aug 08, 2006 page 37 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B
FP-100A
FP-100BV
FP-100AV Mode 4
Mode 5
Mode 6
Mode 7
PROM
Mode
88
91
P72/TMO0/
CS6
P72/TMO0/
CS6
P72/TMO0/
CS6
P72/TMO0
NC
89
92
P71/CS5
P71/CS5
P71/CS5
P71
NC
90
93
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01
NC
91
94
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
NC
92
95
PG1/CS3/
IRQ7
PG1/CS3/
IRQ7
PG1/CS3/
IRQ7
PG1/IRQ7
NC
93
96
PG2/CS2
PG2/CS2
PG2/CS2
PG2
NC
94
97
PG3/CS1
PG3/CS1
PG3/CS1
PG3
NC
95
98
PG4/CS0
PG4/CS0
PG4/CS0
PG4
NC
96
99
PE0/D0
PE0/D0
PE0/D0
PE0
NC
97
100
PE1/D1
PE1/D1
PE1/D1
PE1
NC
98
1
PE2/D2
PE2/D2
PE2/D2
PE2
NC
99
2
PE3/D3
PE3/D3
PE3/D3
PE3
NC
100
3
PE4/D4
PE4/D4
PE4/D4
PE4
NC
Rev. 5.00 Aug 08, 2006 page 38 of 982
REJ09B0054-0500
Section 1 Overview
Table 1.5
Pin Arrangements in Each Mode of H8S/2227 Group
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
1
2
FP-100A*
FP-100B*
1
*
FP-100BV FP-100AV*2 Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
1
4
PE5/D5
PE5/D5
PE5/D5
PE5
OE
2
5
PE6/D6
PE6/D6
PE6/D6
PE6
WE
3
6
PE7/D7
PE7/D7
PE7/D7
PE7
CE
4
7
D8
D8
D8
PD0
D0
5
8
D9
D9
D9
PD1
D1
6
9
D10
D10
D10
PD2
D2
7
10
D11
D11
D11
PD3
D3
8
11
D12
D12
D12
PD4
D4
9
12
D13
D13
D13
PD5
D5
10
13
D14
D14
D14
PD6
D6
11
14
D15
D15
D15
PD7
D7
12
15
VCC
VCC
VCC
VCC
VCC
13
16
A0
A0
PC0/A0
PC0
A0
14
17
VSS
VSS
VSS
VSS
VSS
15
18
A1
A1
PC1/A1
PC1
A1
16
19
A2
A2
PC2/A2
PC2
A2
17
20
A3
A3
PC3/A3
PC3
A3
18
21
A4
A4
PC4/A4
PC4
A4
19
22
A5
A5
PC5/A5
PC5
A5
20
23
A6
A6
PC6/A6
PC6
A6
21
24
A7
A7
PC7/A7
PC7
A7
22
25
PB0/A8
PB0/A8
PB0/A8
PB0
A8
23
26
PB1/A9
PB1/A9
PB1/A9
PB1
A9
24
27
PB2/A10
PB2/A10
PB2/A10
PB2
A10
25
28
PB3/A11
PB3/A11
PB3/A11
PB3
A11
Rev. 5.00 Aug 08, 2006 page 39 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
1
2
FP-100A*
FP-100B*
1
FP-100BV* FP-100AV*2 Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
26
29
PB4/A12
PB4/A12
PB4/A12
PB4
A12
27
30
PB5/A13
PB5/A13
PB5/A13
PB5
A13
28
31
PB6/A14
PB6/A14
PB6/A14
PB6
A14
29
32
PB7/A15
PB7/A15
PB7/A15
PB7
A15
30
33
PA0/A16
PA0/A16
PA0/A16
PA0
A16
31
34
PA1/A17
PA1/A17
PA1/A17
PA1
A17
32
35
PA2/A18
PA2/A18
PA2/A18
PA2
A18
33
36
PA3/A19
PA3/A19
PA3/A19
PA3
NC
34
37
P10/
TIOCA0/
A20
P10/
TIOCA0/
A20
P10/
TIOCA0/
A20
P10/
TIOCA0
NC
35
38
P11/
TIOCB0/
A21
P11/
TIOCB0/
A21
P11/
TIOCB0/
A21
P11/
TIOCB0
NC
36
39
P12/
P12/
TIOCC0/
TIOCC0/
TCLKA/A22 TCLKA/A22
P12/
TIOCC0/
TCLKA/A22
P12/
TIOCC0/
TCLKA
NC
37
40
P13/
P13/
TIOCD0/
TIOCD0/
TCLKB/A23 TCLKB/A23
P13/
TIOCD0/
TCLKB/A23
P13/
TIOCD0/
TCLKB
NC
38
41
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
P14/
TIOCA1/
IRQ0
VSS
39
42
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
P15/
TIOCB1/
TCLKC
NC
40
43
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
P16/
TIOCA2/
IRQ1
VSS
41
44
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
P17/
TIOCB2/
TCLKD
NC
42
45
AVSS
AVSS
AVSS
AVSS
VSS
Rev. 5.00 Aug 08, 2006 page 40 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
1
2
FP-100A*
FP-100B*
1
FP-100BV* FP-100AV*2 Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
43
46
P97
P97
P97
P97
NC
44
47
P96
P96
P96
P96
NC
45
48
P47/AN7
P47/AN7
P47/AN7
P47/AN7
NC
46
49
P46/AN6
P46/AN6
P46/AN6
P46/AN6
NC
47
50
P45/AN5
P45/AN5
P45/AN5
P45/AN5
NC
48
51
P44/AN4
P44/AN4
P44/AN4
P44/AN4
NC
49
52
P43/AN3
P43/AN3
P43/AN3
P43/AN3
NC
50
53
P42/AN2
P42/AN2
P42/AN2
P42/AN2
NC
51
54
P41/AN1
P41/AN1
P41/AN1
P41/AN1
NC
52
55
P40/AN0
P40/AN0
P40/AN0
P40/AN0
NC
53
56
Vref
Vref
Vref
Vref
VCC
54
57
AVCC
AVCC
AVCC
AVCC
VCC
55
58
MD0
MD0
MD0
MD0
VSS
56
59
MD1
MD1
MD1
MD1
VSS
57
60
OSC2
OSC2
OSC2
OSC2
NC
58
61
OSC1
OSC1
OSC1
OSC1
VSS
59
62
RES
RES
RES
RES
RES
60
63
NMI
NMI
NMI
NMI
VCC
61
64
STBY
STBY
STBY
STBY
VCC
62
65
VCC
VCC
VCC
VCC
VCC
63
66
XTAL
XTAL
XTAL
XTAL
XTAL
64
67
VSS
VSS
VSS
VSS
VSS
65
68
EXTAL
EXTAL
EXTAL
EXTAL
EXTAL
66
69
FWE
FWE
FWE
FWE
FWE
67
70
MD2
MD2
MD2
MD2
VSS
68
71
PF7/φ
PF7/φ
PF7/φ
PF7/φ
NC
69
72
AS
AS
AS
PF6
NC
70
73
RD
RD
RD
PF5
NC
Rev. 5.00 Aug 08, 2006 page 41 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
1
2
FP-100A*
FP-100B*
1
FP-100BV* FP-100AV*2 Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
71
74
HWR
HWR
HWR
PF4
NC
72
75
PF3/LWR/
ADTRG/
IRQ3
PF3/LWR/
ADTRG/
IRQ3
PF3/LWR/
ADTRG/
IRQ3
PF3/
ADTRG/
IRQ3
VCC
73
76
PF2/WAIT
PF2/WAIT
PF2/WAIT
PF2
NC
74
77
PF1/BACK/ PF1/BACK/
BUZZ
BUZZ
PF1/BACK/
BUZZ
PF1/BUZZ
NC
75
78
PF0/BREQ/ PF0/BREQ/
IRQ2
IRQ2
PF0/BREQ/
IRQ2
PF0/IRQ2
VCC
76
79
P30/TxD0
P30/TxD0
P30/TxD0
P30/TxD0
NC
77
80
P31/RxD0
P31/RxD0
P31/RxD0
P31/RxD0
NC
78
81
P32/SCK0/
IRQ4
P32/SCK0/
IRQ4
P32/SCK0/
IRQ4
P32/SCK0/
IRQ4
NC
79
82
P33/TxD1
P33/TxD1
P33/TxD1
P33/TxD1
NC
80
83
P34/RxD1
P34/RxD1
P34/RxD1
P34/RxD1
NC
81
84
P35/SCK1/
IRQ5
P35/SCK1/
IRQ5
P35/SCK1/
IRQ5
P35/SCK1/
IRQ5
NC
82
85
P36
P36
P36
P36
NC
83
86
P77/TxD3
P77/TxD3
P77/TxD3
P77/TxD3
NC
84
87
P76/RxD3
P76/RxD3
P76/RxD3
P76/RxD3
NC
85
88
P75/SCK3
P75/SCK3
P75/SCK3
P75/SCK3
NC
86
89
P74/MRES
P74/MRES
P74/MRES
P74/MRES
NC
87
90
P73/TMO1/ P73/TMO1/
CS7
CS7
P73/TMO1/
CS7
P73/TMO1
NC
88
91
P72/TMO0/ P72/TMO0/
CS6
CS6
P72/TMO0/
CS6
P72/TMO0
NC
89
92
P71/CS5
P71/CS5
P71/CS5
P71
NC
90
93
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01/
CS4
P70/
TMRI01/
TMCI01
NC
91
94
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
PG0/IRQ6
NC
Rev. 5.00 Aug 08, 2006 page 42 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Pin Name
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
1
2
FP-100A*
FP-100B*
1
FP-100BV* FP-100AV*2 Mode 4
Mode 5
Mode 6
Mode 7
Flash Memory
Programmable
Mode
92
95
PG1/CS3/
IRQ7
PG1/CS3/
IRQ7
PG1/CS3/
IRQ7
PG1/IRQ7
NC
93
96
PG2/CS2
PG2/CS2
PG2/CS2
PG2
NC
94
97
PG3/CS1
PG3/CS1
PG3/CS1
PG3
NC
95
98
PG4/CS0
PG4/CS0
PG4/CS0
PG4
NC
96
99
PE0/D0
PE0/D0
PE0/D0
PE0
NC
97
100
PE1/D1
PE1/D1
PE1/D1
PE1
NC
98
1
PE2/D2
PE2/D2
PE2/D2
PE2
NC
99
2
PE3/D3
PE3/D3
PE3/D3
PE3
VCC
100
3
PE4/D4
PE4/D4
PE4/D4
PE4
VSS
Notes: 1. Supported only by masked ROM version.
2. Supported only by the HD6432227.
Rev. 5.00 Aug 08, 2006 page 43 of 982
REJ09B0054-0500
Section 1 Overview
1.3.3
Pin Functions
Table 1.6 lists the pin functions of the H8S/2258 Group. Table 1.7 lists the pin functions of the
H8S/2239 Group and H8S/2238 Group. Table 1.8 lists the pin functions of the H8S/2237 Group
and H8S/2227 Group.
Table 1.6
Pin Functions of H8S/2258 Group
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
FP-100B
FP-100BV
Power
supply
VCC
62
65
Input
For connection to the power supply.
Connect all VCC pins to the system power
supply.
CVCC
12
15
Input
Connect a 0.1-µF stabilization capacitance
between this pin and ground. Permanent
damage on the chip may result if the
absolute maximum rating of CVCC 4.3 V is
exceeded. Must not connect the 5 V
external power supply to this pin.
FP-100A
FP-100AV
I/O
Function
See section 25, Power Supply Circuit, for
connection examples.
Clock
VSS
14
64
17
67
Input
For connection to the power supply (0 V).
Connect all VSS pins to the system power
supply (0 V).
XTAL
63
66
Input
For connection to a crystal resonator. For
examples of crystal resonator connection
and external clock input, see section 23,
Clock Pulse Generator.
EXTAL
65
68
Input
For connection to a crystal resonator. This
pin can be also used for external clock
input. For examples of crystal resonator
connection and external clock input, see
section 23, Clock Pulse Generator.
OSC1
58
61
Input
Connects to a 32.768 kHz crystal
resonator. See section 23, Clock Pulse
Generator, for typical connection diagrams
for a crystal resonator.
Rev. 5.00 Aug 08, 2006 page 44 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
FP-100B
FP-100BV
Clock
OSC2
57
60
Input
Connects to a 32.768 kHz crystal
resonator. See section 23, Clock Pulse
Generator, for typical connection diagrams
for a crystal resonator.
φ
68
71
Output
Supplies the system clock to external
devices.
Operating
mode
control
MD2
MD1
MD0
67
56
55
70
59
58
Input
Sets the operating mode. Inputs at these
pins should not be changed during
operation. Except for mode changing, be
sure to fix the levels of the mode pins
(MD2 to MD0) by pulling them down or
pulling them up until the power turns off.
System
control
RES*
59
62
Input
Reset input pin. When this pin is low, the
chip enters the power-on reset state.
MRES
86
89
Input
When this pin is low, the chip enters the
manual reset state.
STBY*
61
64
Input
When this pin is low, a transition is made
to hardware standby mode.
BREQ
75
78
Input
Used by an external bus master to request
the bus mastership to this LSI.
BACK
74
77
Output
Indicates that the bus mastership has
been granted to an external bus master.
FWE
66
69
Input
Enables/disables programming the flash
memory.
NMI*
60
63
Input
Nonmaskable interrupt pin. If this pin is not
used, it should be fixed high.
IRQ7
IRQ6
IRQ5
IRQ4
IRQ3
IRQ2
IRQ1
IRQ0
92
91
81
78
72
75
40
38
95
94
84
81
75
78
43
41
Input
These pins request a maskable interrupt.
A23 to
A0
37 to 15,
13
40 to 18,
16
Output
Outputs Address.
Interrupts
Address
bus
FP-100A
FP-100AV
I/O
Function
Rev. 5.00 Aug 08, 2006 page 45 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
FP-100B
FP-100BV
Data bus
D15 to
D0
100 to 96,
11 to 1
100, 99,
14 to 1
Input/
output
Used as the bidirectional data bus.
Bus
control
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
87
88
89
90
92
93
94
95
90
91
92
93
95
96
97
98
Output
Select signals for areas 7 to 0.
AS
69
72
Output
When this pin is low, it indicates valid
address output on the address bus.
RD
70
73
Output
When this pin is low, it indicates that the
external address space is being read.
HWR
71
74
Output
Strobe signal: Writes to the external
address bus to indicate valid data on the
upper data bus (D15 to D8).
LWR
72
75
Output
Strobe signal: Writes to the external bus to
indicate valid data on the lower data bus
(D7 to D0).
WAIT
73
76
Input
Requests insertion of wait states in bus
cycle when accesses to the external threestate address.
41
39
37
36
44
42
40
39
Input
These pins input an external clock.
TIOCA0
TIOCB0
TIOCC0
TIOCD0
34
35
36
37
37
38
39
40
Input/
Output
Pins for the TGRA_0 to TGRD_0 input
capture input, output compare output, or
PWM output.
TIOCA1
TIOCB1
38
39
41
42
Input/
Output
Pins for the TGRA_1 and TGRB_1 input
capture input, output compare output, or
PWM output.
TIOCA2
TIOCB2
40
41
43
44
Input/
Output
Pins for the TGRA_2 and TGRB_2 input
capture input, output compare output, or
PWM output.
16-bit timer- TCLKD
pulse unit TCLKC
(TPU)
TCLKB
TCLKA
FP-100A
FP-100AV
I/O
Function
Rev. 5.00 Aug 08, 2006 page 46 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
TFP-100B
TFP-100BV
FP-100B
FP-100BV
FP-100A
FP-100AV
16-bit timer- TIOCA3
pulse unit TIOCB3
(TPU)
TIOCC3
TIOCD3
22
23
24
25
TIOCA4
TIOCB4
TIOCA5
TIOCB5
I/O
Function
25
26
27
28
Input/
Output
Pins for the TGRA_3 to TGRD_3 input
capture input, output compare output, or
PWM output.
26
27
29
30
Input/
Output
Pins for the TGRA_4 and TGRB_4 input
capture input, output compare output, or
PWM output.
28
29
31
32
Input/
Output
Pins for the TGRA_5 and TGRB_5 input
capture input, output compare output, or
PWM output.
TMO3 to 88 to 85
TMO0
91 to 88
Output
Compare-match output pins.
TMCI23
TMCI01
89
90
92
93
Input
Pins for external clock input to the counter.
TMRI23
TMRI01
89
90
92
93
Input
Counter reset input pins.
Watchdog BUZZ
timer (WDT)
74
77
Output
This pin outputs the pulse that is divided
by watchdog timer.
Serial
communication
interface
(SCI)/
smart card
interface
TxD3
TxD2
TxD1
TxD0
83
31
79
76
86
34
82
79
Output
Data output pins.
RxD3
RxD2
RxD1
RxD0
84
32
80
77
87
35
83
80
Input
Data input pins.
SCK3
SCK2
SCK1
SCK0
85
33
81
78
88
36
84
81
Input/
Output
Clock input/output pins. SCK1 outputs
NMOS push/pull.
SCL1
SCL0
79
81
82
84
Input/
Output
I2C clock input/output pins. These pins
drive bus. The output of SCL0 is NMOS
open drain.
SDA1
SDA0
78
80
81
83
Input/
Output
I2C data input/output pins. These pins
drive bus. The output of SDA0 is NMOS
open drain.
Type
8-bit timer
I2C bus
interface
(IIC)
(optional)
Symbol
Rev. 5.00 Aug 08, 2006 page 47 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
FP-100B
FP-100BV
IEBus
controller
(IEB)
Tx
93
96
Output
IEB transmit data output pin.
Rx
94
97
Input
IEB receive data input pin
A/D
converter
AN7 to
AN0
52 to 45
55 to 48
Input
Analog input pins for the A/D converter.
ADTRG
72
75
Input
Pin for input of an external trigger to start
A/D conversion.
D/A
converter
DA1
DA0
43
44
46
47
Output
Analog output pins for the D/A converter.
A/D
converter,
D/A
converter
AVCC
54
57
Input
Power supply pin for the A/D converter
and D/A converter. If none of the A/D
converter and D/A converter is used,
connect this pin to the system power
supply (+5 V).
AVSS
42
45
Input
Ground pin for the A/D converter and D/A
converter. Connect this pin to the system
power supply (0 V).
Vref
53
56
Input
Reference voltage input pin for the A/D
converter and D/A converter. If neither the
A/D converter nor D/A converter is used,
connect this pin to the system power
supply (+5 V).
P17 to
P10
41 to 34
44 to 37
Input/
Output
8-bit I/O pins.
P36 to
P30
82 to 76
85 to 79
Input/
Output
7-bit I/O pins.
P34 and P35 output NMOS push/pull.
P47 to
P40
52 to 45
55 to 48
Input
8-bit input pins.
P77 to
P70
90 to 83
93 to 86
Input/
Output
8-bit I/O pins.
P97
P96
43
44
46
47
Input
2-bit input pins.
PA3 to
PA0
33 to 30
36 to 33
Input/
Output
4-bit I/O pins.
PB7 to
PB0
29 to 22
32 to 25
Input/
Output
8-bit I/O pins.
I/O ports
FP-100A
FP-100AV
I/O
Function
Rev. 5.00 Aug 08, 2006 page 48 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
TFP-100B
TFP-100BV
FP-100B
FP-100BV
FP-100A
FP-100AV
I/O
Function
24 to 18, 16
Input/
Output
8-bit I/O pins.
14 to 7
Input/
Output
8-bit I/O pins.
100 to 96, 3 to 1 100, 99,
6 to 1
Input/
Output
8-bit I/O pins.
PF7 to
PF0
75 to 68
78 to 71
Input/
Output
8-bit I/O pins.
PG4 to
PG0
95 to 91
98 to 94
Input/
Output
5-bit I/O pins.
Type
Symbol
I/O ports
PC7 to
PC0
21 to 15, 13
PD7 to
PD0
11 to 4
PE7 to
PE0
Note:
*
Measures should be taken to deal with noise, which can cause operation errors
otherwise.
Rev. 5.00 Aug 08, 2006 page 49 of 982
REJ09B0054-0500
Section 1 Overview
Table 1.7
Pin Functions of H8S/2239 Group and H8S/2238 Group
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
FP-100B FP-100A*3 TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
Power
supply
VCC
62
65
F9, G10
Input
For connection to the power supply.
Connect all VCC pins to the system power
supply.
CVCC
12
15
E2, F3
Input
With a 5-V external power supply
(H8S/2238B used), connect a 0.1-µF
stabilization capacitance between this pin
and ground. Permanent damage on the
chip may result if the absolute maximum
rating of CVCC 4.3 V is exceeded. Must not
connect the 5 V external power supply to
this pin.
Function
With a 3-V external power supply
(H8S/2239, H8S/2238R, and H8S/2236R
used), connect this pin to the system
power supply. See section 25, Power
Supply Circuit, for connection examples.
Clock
VSS
14
64
17
67
F3, F2
F10, F8
Input
For connection to the power supply (0 V).
Connect all VSS pins to the system power
supply (0 V).
XTAL
63
66
F11
Input
For connection to a crystal resonator. For
examples of crystal resonator connection
and external clock input, see section 23,
Clock Pulse Generator.
EXTAL
65
68
E11
Input
For connection to a crystal resonator. This
pin can be also used for external clock
input. For examples of crystal resonator
connection and external clock input, see
section 23, Clock Pulse Generator.
OSC1
58
61
H11
Input
Connects to a 32.768 kHz crystal
resonator. See section 23, Clock Pulse
Generator, for typical connection diagrams
for a crystal resonator.
Rev. 5.00 Aug 08, 2006 page 50 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
Clock
OSC2
57
60
H10
Input
Connects to a 32.768 kHz crystal
resonator. See section 23, Clock Pulse
Generator, for typical connection diagrams
for a crystal resonator.
φ
68
71
D11
Output
Supplies the system clock to external
devices.
Operating
mode
control
MD2
MD1
MD0
67
56
55
70
59
58
E9
H9
J11
Input
Sets the operating mode. Inputs at these
pins should not be changed during
operation. Except for mode changing, be
sure to fix the levels of the mode pins
(MD2 to MD0) by pulling them down or
pulling them up until the power turns off.
System
control
RES*5
59
62
G8
Input
Reset input pin. When this pin is low, the
chip enters the power-on reset state.
MRES
86
89
B7
Input
When this pin is low, the chip enters the
manual reset state.
STBY*5
61
64
G11
Input
When this pin is low, a transition is made
to hardware standby mode.
BREQ
75
78
C9
Input
Used by an external bus master to request
the bus mastership to this LSI.
BACK
74
77
B11
Output
Indicates that the bus mastership has
been granted to an external bus master.
FWE
66
69
E10
Input
Enables/disables programming the flash
memory.
NMI*5
60
63
G9
Input
Nonmaskable interrupt pin. If this pin is not
used, it should be fixed high.
IRQ7
IRQ6
IRQ5
IRQ4
IRQ3
IRQ2
IRQ1
IRQ0
92
91
81
78
72
75
40
38
95
94
84
81
75
78
43
41
B5
A5
B8
B9
D9
C9
K6
J6
Input
These pins request a maskable interrupt.
Interrupts
Function
Rev. 5.00 Aug 08, 2006 page 51 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
Address
bus
A23 to
A0
37 to 15,
13
40 to 18,
16
L5, L4, L3, Output
L2, K5, K4,
K3, K2, K1,
J5, J4, J3,
J2, J1, H5,
H4, H3, H2,
H1, G4, G3,
G2, G1, F1
Outputs Address.
Data bus
D15 to
D0
100 to 96, 100, 99,
11 to 1
14 to 1
E4, E3, E1, Input/
D4, D3, D2, output
D1, C4, C2,
C1, B4, B3,
B2, B1, A3,
A2
Used as the bidirectional data bus.
Bus
control
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
87
88
89
90
92
93
94
95
90
91
92
93
95
96
97
98
C6
A6
B6
D6
B5
C5
A4
D5
Output
Select signals for areas 7 to 0.
AS
69
72
E8
Output
When this pin is low, it indicates valid
address output on the address bus.
RD
70
73
D10
Output
When this pin is low, it indicates that the
external address space is being read.
HWR
71
74
C11
Output
Strobe signal: Writes to the external
address bus to indicate valid data on the
upper data bus (D15 to D8).
LWR
72
75
D9
Output
Strobe signal: Writes to the external bus to
indicate valid data on the lower data bus
(D7 to D0).
WAIT
73
76
C10
Input
Requests insertion of wait states in bus
cycle when accesses to the external threestate address.
Rev. 5.00 Aug 08, 2006 page 52 of 982
REJ09B0054-0500
Function
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
DMA
controller
(DMAC)*2
DREQ1
DREQ0
89
90

B6
D6
Input
Request DMAC activation.
(Supported only by the H8S/2239 Group.)
TEND1
TEND0
87
88

C6
A6
Output
Indicate that the DMAC has ended
transmitting data.
(Supported only by the H8S/2239 Group.)
DACK1
DACK0
35
34

J5
H5
Output
These pins function as single address
transmitting acknowledge of DMAC.
(Supported only by the H8S/2239 Group.)
16-bit timer- TCLKD
pulse unit TCLKC
(TPU)
TCLKB
TCLKA
41
39
37
36
44
42
40
39
H6
L6
K5
L5
Input
These pins input an external clock.
TIOCA0
TIOCB0
TIOCC0
TIOCD0
34
35
36
37
37
38
39
40
H5
J5
L5
K5
Input/
Output
Pins for the TGRA_0 to TGRD_0 input
capture input, output compare output, or
PWM output.
TIOCA1
TIOCB1
38
39
41
42
J6
L6
Input/
Output
Pins for the TGRA_1 and TGRB_1 input
capture input, output compare output, or
PWM output.
TIOCA2
TIOCB2
40
41
43
44
K6
H6
Input/
Output
Pins for the TGRA_2 and TGRB_2 input
capture input, output compare output, or
PWM output.
TIOCA3
TIOCB3
TIOCC3
TIOCD3
22
23
24
25
25
26
27
28
H3
J2
K1
J3
Input/
Output
Pins for the TGRA_3 to TGRD_3 input
capture input, output compare output, or
PWM output.
TIOCA4
TIOCB4
26
27
29
30
K2
L2
Input/
Output
Pins for the TGRA_4 and TGRB_4 input
capture input, output compare output, or
PWM output.
TIOCA5
TIOCB5
28
29
31
32
H4
K3
Input/
Output
Pins for the TGRA_5 and TGRB_5 input
capture input, output compare output, or
PWM output.
Function
Rev. 5.00 Aug 08, 2006 page 53 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
Type
Symbol
8-bit timer
TMO3 to 88 to 85
TMO0
91 to 88
A7, A6, B7, Output
C6
Compare-match output pins.
TMCI23
TMCI01
89
90
92
93
B6
D6
Input
Pins for external clock input to the counter.
TMRI23
TMRI01
89
90
92
93
B6
D6
Input
Counter reset input pins.
Watchdog BUZZ
timer (WDT)
74
77
B11
Output
This pin outputs the pulse that is divided
by watchdog timer.
Serial
communication
interface
(SCI)/
smart card
interface
TxD3
TxD2
TxD1
TxD0
83
31
79
76
86
34
82
79
D7
J4
A9
A10
Output
Data output pins.
RxD3
RxD2
RxD1
RxD0
84
32
80
77
87
35
83
80
C7
K4
C8
D8
Input
Data input pins.
SCK3
SCK2
SCK1
SCK0
85
33
81
78
88
36
84
81
A7
L4
B8
B9
Input/
Output
Clock input/output pins. SCK1 outputs
NMOS push/pull.
SCL1
SCL0
79
81
82
84
A9
B8
Input/
Output
I2C clock input/output pins. These pins
drive bus. The output of SCL0 is NMOS
open drain.
SDA1
SDA0
78
80
81
83
B9
C8
Input/
Output
I2C data input/output pins. These pins
drive bus. The output of SDA0 is NMOS
open drain.
AN7 to
AN0
52 to 45
55 to 48
Input
L10, L9,
K11, K10,
K9, K8, J8,
H7
Analog input pins for the A/D converter.
ADTRG
72
75
D9
Pin for input of an external trigger to start
A/D conversion.
I2C bus
interface
(IIC)
(optional)
A/D
converter
Rev. 5.00 Aug 08, 2006 page 54 of 982
REJ09B0054-0500
Input
Function
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
D/A
converter
DA1
DA0
43
44
46
47
J7
L8
Output
Analog output pins for the D/A converter.
A/D
converter,
D/A
converter
AVCC
54
57
J10
Input
Power supply pin for the A/D converter
and D/A converter. If none of the A/D
converter and D/A converter is used,
connect this pin to the system power
supply (+3 V).
AVSS
42
45
K7, L7
Input
Ground pin for the A/D converter and D/A
converter. Connect this pin to the system
power supply (0 V).
Vref
53
56
H8
Input
Reference voltage input pin for the A/D
converter and D/A converter. If neither the
A/D converter nor D/A converter is used,
connect this pin to the system power
supply (+3 V).
P17 to
P10
41 to 34
44 to 37
L6, L5, K6,
K5, J6, J5,
H6, H5
Input/
Output
8-bit I/O pins.
P36 to
P30
82 to 76
85 to 79
D8, C8, B9, Input/
B8, A10, A9, Output
A8
7-bit I/O pins.
P34 and P35 output NMOS push/pull.
P47 to
P40
52 to 45
55 to 48
Input
L10, L9,
K11, K10,
K9, K8, H7,
J8
8-bit input pins.
P77 to
P70
90 to 83
93 to 86
D7, D6, C7, Input/
C6, B7, B6, Output
A7, A6
8-bit I/O pins.
P97
P96
43
44
46
47
J7
L8
Input
2-bit input pins.
PA3 to
PA0
33 to 30
36 to 33
L4, L3, K3,
J4
Input/
Output
4-bit I/O pins.
PB7 to
PB0
29 to 22
32 to 25
L2, K3, K2, Input/
K1, J3, J2, Output
H4, H3
8-bit I/O pins.
I/O ports
Function
Rev. 5.00 Aug 08, 2006 page 55 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
BP-112*1
TFP-100GV
BP-112V*1
3
FP-100B FP-100A* TBP-112A*4
FP-100BV FP-100AV*3 TBP-112AV*4 I/O
I/O ports
PC7 to
PC0
21 to 15,
13
24 to 18,
16
J1, H2, H1, Input/
G4, G3, G2, Output
G1, F1
8-bit I/O pins.
PD7 to
PD0
11 to 4
14 to 7
E4, E3, E1, Input/
D3, D2, D1, Output
C2, C1
8-bit I/O pins.
PE7 to
PE0
100 to 96, 100, 99,
3 to 1
6 to 1
D4, C4, B4, Input/
B3, B2, B1, Output
A3, A2
8-bit I/O pins.
PF7 to
PF0
75 to 68
78 to 71
E8, D11,
D10, D9,
C11, C10,
C9, B11
Input/
Output
8-bit I/O pins.
PG4 to
PG0
95 to 91
98 to 94
D5, C5, B5, Input/
A5, A4
Output
5-bit I/O pins.
Notes: 1.
2.
3.
4.
5.
Function
Supported only by the HD64F2238R.
Supported only by the H8S/2239 Group.
Supported only by the H8S/2238B and H8S/2236B.
Supported only by the HD64F2238R and HD64F2239.
Measures should be taken to deal with noise, which can cause operation errors
otherwise.
Rev. 5.00 Aug 08, 2006 page 56 of 982
REJ09B0054-0500
Section 1 Overview
Table 1.8
Pin Functions of H8S/2237 Group and H8S/2227 Group
Pin No.
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B*1 FP-100A*2
FP-100BV*1 FP-100AV*2 I/O
Function
Type
Symbol
Power supply
VCC
12
62
15
65
Input
For connection to the power supply. Connect all
VCC pins to the system power supply.
VSS
14
64
17
67
Input
For connection to the power supply (0 V).
Connect all VSS pins to the system power supply
(0 V).
XTAL
63
66
Input
For connection to a crystal resonator. For
examples of crystal resonator connection and
external clock input, see section 23, Clock Pulse
Generator.
EXTAL
65
68
Input
For connection to a crystal resonator. This pin
can be also used for external clock input. For
examples of crystal resonator connection and
external clock input, see section 23, Clock Pulse
Generator.
OSC1
58
61
Input
Connects to a 32.768 kHz crystal resonator. See
section 23, Clock Pulse Generator, for typical
connection diagrams for a crystal resonator.
OSC2
57
60
Input
Connects to a 32.768 kHz crystal resonator. See
section 23, Clock Pulse Generator, for typical
connection diagrams for a crystal resonator.
φ
68
71
Output
Supplies the system clock to external devices.
Operating
mode
control
MD2
MD1
MD0
67
56
55
70
59
58
Input
Sets the operating mode. Inputs at these pins
should not be changed during operation. Except
for mode changing, be sure to fix the levels of the
mode pins (MD2 to MD0) by pulling them down
or pulling them up until the power turns off.
System
control
RES*3
59
62
Input
Reset input pin. When this pin is low, the chip
enters in the power-on reset state.
MRES
86
89
Input
When this pin is low, the chip enters in the
manual reset state.
STBY*3
61
64
Input
When this pin is low, a transition is made to
hardware standby mode.
Clock
Rev. 5.00 Aug 08, 2006 page 57 of 982
REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B*1 FP-100A*2
FP-100BV*1 FP-100AV*2 I/O
System
control
BREQ
75
78
Input
Used by an external bus master to request the
bus mastership to this LSI.
BACK
74
77
Output
Indicates that the bus mastership has been
granted to an external bus master.
FEW
66
69
Input
Enables/disables programming the flash
memory.
NMI*3
60
63
Input
Nonmaskable interrupt pin. If this pin is not used,
it should be fixed-high.
IRQ7
IRQ6
IRQ5
IRQ4
IRQ3
IRQ2
IRQ1
IRQ0
92
91
81
78
72
75
40
38
95
94
84
81
75
78
43
41
Input
These pins request a maskable interrupt.
Address bus
A23 to A0
37 to 15,
13
40 to 18, 16 Output
Outputs Address.
Data bus
D15 to D0
100 to 96,
11 to 1
100, 99,
14 to 1
Input/
output
Used as the bidirectional data bus.
Bus control
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
87
88
89
90
92
93
94
95
90
91
92
93
95
96
97
98
Output
Select signals for areas 7 to 0.
AS
69
72
Output
When this pin is low, it indicates valid address
output on the address bus.
RD
70
73
Output
When this pin is low, it indicates that the external
address space is being read.
HWR
71
74
Output
Strobe signal: Writes to the external address bus
to indicate valid data on the upper data bus (D15
to D8).
Interrupts
Rev. 5.00 Aug 08, 2006 page 58 of 982
REJ09B0054-0500
Function
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B*1 FP-100A*2
FP-100BV*1 FP-100AV*2 I/O
Bus control
LWR
72
75
Output
Strobe signal: Writes to the external bus to
indicate valid data on the lower data bus (D7 to
D0).
WAIT
73
76
Input
Requests insertion of wait states in bus cycle
when accesses to the external three state
address.
TCLKD
TCLKC
TCLKB
TCLKA
41
39
37
36
44
42
40
39
Input
These pins input an external clock.
TIOCA0
TIOCB0
TIOCC0
TIOCD0
34
35
36
37
37
38
39
40
Input/
Output
Pins for the TGRA_0 to TGRD_0 input capture
input, output compare output, or PWM output.
TIOCA1
TIOCB1
38
39
41
42
Input/
Output
Pins for the TGRA_1 and TGRB_1 input capture
input, output compare output, or PWM output.
TIOCA2
TIOCB2
40
41
43
44
Input/
Output
Pins for the TGRA_2 and TGRB_2 input capture
input, output compare output, or PWM output.
TIOCA3
TIOCB3
TIOCC3
TIOCD3
22
23
24
25
25
26
27
28
Input/
Output
Pins for the TGRA_3 to TGRD_3 input capture
input, output compare output, or PWM output.
(Not available in the H8S/2227 Group.)
TIOCA4
TIOCB4
26
27
29
30
Input/
Output
Pins for the TGRA_4 and TGRB_4 input capture
input, output compare output, or PWM output.
(Not available in the H8S/2227 Group.)
TIOCA5
TIOCB5
28
29
31
32
Input/
Output
Pins for the TGRA_5 and TGRB_5 input capture
input, output compare output, or PWM output.
(Not available in the H8S/2227 Group.)
TMO1
TMO0
87
88
90
91
Output
Compare-match output pins.
TMCI01
90
93
Input
Pin for external clock input to the counter.
TMRI01
90
93
Input
Counter reset input pin.
BUZZ
74
77
Output
This pin outputs the pulse that is divided by
watchdog timer.
16-bit timerpulse unit
(TPU)
8-bit timer
Watchdog
timer (WDT)
Function
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REJ09B0054-0500
Section 1 Overview
Pin No.
Type
Symbol
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B*1 FP-100A*2
FP-100BV*1 FP-100AV*2 I/O
Serial
communication
interface
(SCI)/
smart card
interface
TxD3
TxD2
TxD1
TxD0
83
31
79
76
86
34
82
79
Output
Data output pins.
(TxD2 is not available in the H8S/2227 Group.)
RxD3
RxD2
RxD1
RxD0
84
32
80
77
87
35
83
80
Input
Data input pins.
(RxD2 is not available in the H8S/2227 Group.)
SCK3
SCK2
SCK1
SCK0
85
33
81
78
88
36
84
81
Input/
Output
Clock input/output pins.
(SCK2 is not available in the H8S/2227 Group.)
52 to 45
55 to 48
Input
Analog input pins for the A/D converter.
72
75
Input
Pin for input of an external trigger to start A/D
conversion.
D/A converter DA1
DA0
43
44
46
47
Output
Analog output pins for the D/A converter.
(Not available in the H8S/2227 Group.)
A/D converter, AVCC
D/A converter
54
57
Input
Power supply pin for the A/D converter and D/A
converter. If none of the A/D converter and D/A
converter is used, connect this pin to the system
power supply.
AVSS
42
45
Input
Ground pin for the A/D converter and D/A
converter. Connect this pin to the system power
supply (0 V).
Vref
53
56
Input
Reference voltage input pin for the A/D converter
and D/A converter. If neither the A/D converter
nor D/A converter is used, connect this pin to the
system power supply.
P17 to
P10
41 to 34
44 to 37
Input/
Output
8-bit I/O pins.
P36 to
P30
82 to 76
85 to 79
Input/
Output
7-bit I/O pins.
A/D converter AN7 to
AN0
ADTRG
I/O ports
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Function
Section 1 Overview
Pin No.
TFP-100B
TFP-100BV
TFP-100G
TFP-100GV
FP-100B*1 FP-100A*2
FP-100BV*1 FP-100AV*2 I/O
Function
Type
Symbol
I/O ports
P47 to
P40
52 to 45
55 to 48
Input
8-bit input pins.
P77 to
P70
90 to 83
93 to 86
Input/
Output
8-bit I/O pins.
P97
P96
43
44
46
47
Input
2-bit input pins.
PA3 to
PA0
33 to 30
36 to 33
Input/
Output
4-bit I/O pins.
PB7 to
PB0
29 to 22
32 to 25
Input/
Output
8-bit I/O pins.
PC7 to
PC0
21 to 15,
13
24 to 18, 16 Input/
Output
8-bit I/O pins.
PD7 to
PD0
11 to 4
14 to 7
Input/
Output
8-bit I/O pins.
PE7 to
PE0
100 to 96,
3 to 1
100, 99,
6 to 1
Input/
Output
8-bit I/O pins.
PF7 to
PF0
75 to 68
78 to 71
Input/
Output
8-bit I/O pins.
PG4 to
PG0
95 to 91
98 to 94
Input/
Output
5-bit I/O pins.
Notes: 1. In H8S/2227 Group, supported only by masked ROM version.
2. In H8S/2227 Group, supported only by the HD6432227.
3. Measures should be taken to deal with noise, which can cause operation errors
otherwise.
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Section 1 Overview
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Section 2 CPU
Section 2 CPU
The H8S/2000 CPU is a high-speed central processing unit with an internal 32-bit architecture that
is upward-compatible with the H8/300 and H8/300H CPUs. The H8S/2000 CPU has sixteen 16-bit
general registers, can address a 16-Mbyte linear address space, and is ideal for realtime control.
This section describes the H8S/2000 CPU. The usable modes and address spaces differ depending
on the product. For details on each product, refer to section 3, MCU Operating Modes.
2.1
Features
• Upward-compatible with H8/300 and H8/300H CPU
 Can execute H8/300 and H8/300H CPU object programs
• General-register architecture
 Sixteen 16-bit general registers also usable as sixteen 8-bit registers or eight 32-bit registers
• Sixty-five basic instructions
 8/16/32-bit arithmetic and logic instructions
 Multiply and divide instructions
 Powerful bit-manipulation instructions
• Eight addressing modes
 Register direct [Rn]
 Register indirect [@ERn]
 Register indirect with displacement [@(d:16,ERn) or @(d:32,ERn)]
 Register indirect with post-increment or pre-decrement [@ERn+ or @–ERn]
 Absolute address [@aa:8, @aa:16, @aa:24, or @aa:32]
 Immediate [#xx:8, #xx:16, or #xx:32]
 Program-counter relative [@(d:8,PC) or @(d:16,PC)]
 Memory indirect [@@aa:8]
• 16-Mbyte address space
 Program: 16 Mbytes
 Data:
16 Mbytes
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Section 2 CPU
• High-speed operation
 All frequently-used instructions execute in one or two states
 8/16/32-bit register-register add/subtract : 1 state
 8 × 8-bit register-register multiply
: 12 states
 16 ÷ 8-bit register-register divide
: 12 states
 16 × 16-bit register-register multiply
: 20 states
 32 ÷ 16-bit register-register divide
: 20 states
• Two CPU operating modes
 Normal mode*
 Advanced mode
• Power-down state
 Transition to power-down state by a SLEEP instruction
 CPU clock speed selection
Note: * Normal mode is not available in this LSI.
2.1.1
Differences between H8S/2600 CPU and H8S/2000 CPU
The differences between the H8S/2600 CPU and the H8S/2000 CPU are shown below.
• Register configuration
 The MAC register is supported by the H8S/2600 CPU only.
• Basic instructions
 The four instructions MAC, CLRMAC, LDMAC, and STMAC are supported by the
H8S/2600 CPU only.
• The number of execution states of the MULXU and MULXS instructions;
Execution States
Instruction
Mnemonic
H8S/2600
H8S/2000
MULXU
MULXU.B Rs, Rd
3
12
MULXU.W Rs, ERd
4
20
MULXS.B Rs, Rd
4
13
MULXS.W Rs, ERd
5
21
MULXS
In addition, there are differences in address space, CCR and EXR register functions, and powerdown modes, etc., depending on the model.
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Section 2 CPU
2.1.2
Differences from H8/300 CPU
In comparison to the H8/300 CPU, the H8S/2000 CPU has the following enhancements:
• More general registers and control registers
 Eight 16-bit expanded registers, and one 8-bit and two 32-bit control registers, have been
added.
• Expanded address space
 Normal mode supports the same 64-kbyte address space as the H8/300 CPU.
 Advanced mode supports a maximum 16-Mbyte address space.
• Enhanced addressing
 The addressing modes have been enhanced to make effective use of the 16-Mbyte address
space.
• Enhanced instructions
 Addressing modes of bit-manipulation instructions have been enhanced.
 Signed multiply and divide instructions have been added.
 Two-bit shift instructions have been added.
 Instructions for saving and restoring multiple registers have been added.
 A test and set instruction has been added.
• Higher speed
 Basic instructions execute twice as fast.
2.1.3
Differences from H8/300H CPU
In comparison to the H8/300H CPU, the H8S/2000 CPU has the following enhancements:
• Additional control register
 One 8-bit control registers have been added.
• Enhanced instructions
 Addressing modes of bit-manipulation instructions have been enhanced.
 Two-bit shift instructions have been added.
 Instructions for saving and restoring multiple registers have been added.
 A test and set instruction has been added.
• Higher speed
 Basic instructions execute twice as fast.
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Section 2 CPU
2.2
CPU Operating Modes
The H8S/2000 CPU has two operating modes: normal and advanced. Normal mode supports a
maximum 64-kbyte address space. Advanced mode supports a maximum 16-Mbyte total address
space. The mode is selected by the mode pins.
2.2.1
Normal Mode
In normal mode, the exception vector table and stack have the same structure as the H8/300 CPU.
• Address Space
Linear access is provided to a maximum address space of 64 kbytes.
• Extended Registers (En)
The extended registers (E0 to E7) can be used as 16-bit registers, or as the upper 16-bit
segments of 32-bit registers. When En is used as a 16-bit register it can contain any value, even
when the corresponding general register (Rn) is used as an address register. If the general
register is referenced in the register indirect addressing mode with pre-decrement (@–Rn) or
post-increment (@Rn+) and a carry or borrow occurs, however, the value in the corresponding
extended register (En) will be affected.
• Instruction Set
All instructions and addressing modes can be used. Only the lower 16 bits of effective
addresses (EA) are valid.
• Exception Vector Table and Memory Indirect Branch Addresses
In normal mode the top area starting at H'0000 is allocated to the exception vector table. One
branch address is stored per 16 bits. Figure 2.1 shows the structure of the exception vector
table in normal mode. For details of the exception vector table, see section 4, Exception
Handling.
The memory indirect addressing mode (@@aa:8) employed in the JMP and JSR instructions
uses an 8-bit absolute address included in the instruction code to specify a memory operand
that contains a branch address. In normal mode the operand is a 16-bit word operand,
providing a 16-bit branch address. Branch addresses can be stored in the top area from H'0000
to H'00FF. Note that this area is also used for the exception vector table.
• Stack Structure
In normal mode, when the program counter (PC) is pushed onto the stack in a subroutine call,
and the PC, condition-code register (CCR) and extended control register (EXR) are pushed
onto the stack in exception handling, they are stored as shown in figure 2.2. EXR is not pushed
onto the stack in interrupt control mode 0. For details, see section 4, Exception Handling.
Note: Normal mode is not available in this LSI.
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Section 2 CPU
H'0000
H'0001
H'0002
H'0003
H'0004
H'0005
H'0006
H'0007
H'0008
H'0009
H'000A
H'000B
Reset exception vector
(Reserved for system use)
Exception
vector table
Exception vector 1
Exception vector 2
Figure 2.1 Exception Vector Table (Normal Mode)
SP
PC
(16 bits)
EXR*1
SP
Reserved*1*3
(SP*2
)
CCR
CCR*3
PC
(16 bits)
(a) Subroutine Branch
(b) Exception Handling
Notes: 1. When EXR is not used it is not stored on the stack.
2. SP when EXR is not used.
3. lgnored when returning.
Figure 2.2 Stack Structure in Normal Mode
2.2.2
Advanced Mode
• Address Space
Linear access is provided to a maximum 16-Mbyte address space.
• Extended Registers (En)
The extended registers (E0 to E7) can be used as 16-bit registers, or as the upper 16-bit
segments of 32-bit registers or address registers.
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Section 2 CPU
• Instruction Set
All instructions and addressing modes can be used.
• Exception Vector Table and Memory Indirect Branch Addresses
In advanced mode, the top area starting at H'00000000 is allocated to the exception vector
table in units of 32 bits. In each 32 bits, the upper 8 bits are ignored and a branch address is
stored in the lower 24 bits (figure 2.3). For details of the exception vector table, see section 4,
Exception Handling.
H'00000000
Reserved
Reset exception vector
H'00000003
H'00000004
H'00000007
H'00000008
Exception vector table
(Reserved for system use)
H'0000000B
H'0000000C
H'00000010
Reserved
Exception vector 1
Figure 2.3 Exception Vector Table (Advanced Mode)
The memory indirect addressing mode (@@aa:8) employed in the JMP and JSR instructions
uses an 8-bit absolute address included in the instruction code to specify a memory operand
that contains a branch address. In advanced mode, the operand is a 32-bit longword operand,
providing a 32-bit branch address. The upper 8 bits of these 32 bits is a reserved area that is
regarded as H'00. Branch addresses can be stored in the area from H'00000000 to H'000000FF.
Note that the first part of this range is also the exception vector table.
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Section 2 CPU
• Stack Structure
In advanced mode, when the program counter (PC) is pushed onto the stack in a subroutine
call, and the PC, condition-code register (CCR), and extended control register (EXR) are
pushed onto the stack in exception handling, they are stored as shown in figure 2.4. When
EXR is invalid, it is not pushed onto the stack. For details, see section 4, Exception Handling.
EXR*1
Reserved*1*3
SP
SP
Reserved
PC
(24 bits)
(SP*2
)
CCR
PC
(24 bits)
(a) Subroutine Branch
(b) Exception Handling
Notes: 1. When EXR is not used it is not stored on the stack.
2. SP when EXR is not used.
3. Ignored when returning.
Figure 2.4 Stack Structure in Advanced Mode
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Section 2 CPU
2.3
Address Space
Figure 2.5 shows a memory map of the H8S/2000 CPU. The H8S/2000 CPU provides linear
access to a maximum 64-kbyte address space in normal mode, and a maximum 16-Mbyte
(architecturally 4-Gbyte) address space in advanced mode. The usable modes and address spaces
differ depending on the product. For details on each product, refer to section 3, MCU Operating
Modes.
H'0000
H'00000000
64 kbytes
H'FFFF
16 Mbytes
H'00FFFFFF
Data area
H'FFFFFFFF
(a) Normal Mode*
(b) Advanced Mode
Note: * Normal mode is not available in this LSI.
Figure 2.5 Memory Map
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Program area
Section 2 CPU
2.4
Register Configuration
The H8S/2000 CPU has the internal registers shown in figure 2.6. There are two types of registers:
general registers and control registers. Control registers are a 24-bit program counter (PC), an 8-bit
extended control register (EXR), and an 8-bit condition code register (CCR).
General Registers (Rn) and Extended Registers (En)
15
0 7
0 7
0
ER0
E0
R0H
R0L
ER1
E1
R1H
R1L
ER2
E2
R2H
R2L
ER3
E3
R3H
R3L
ER4
E4
R4H
R4L
ER5
E5
R5H
R5L
ER6
E6
R6H
R6L
ER7 (SP)
E7
R7H
R7L
Control Registers (CR)
23
0
PC
7 6 5 4 3 2 1 0
EXR T - - - - I2 I1 I0
7 6 5 4 3 2 1 0
CCR I UI H U N Z V C
Legend:
SP:
Stack pointer
PC:
Program counter
EXR: Extended control register
T:
Trace bit
I2 to I0: Interrupt mask bits
CCR: Condition-code register
I:
Interrupt mask bit
UI:
User bit or interrupt mask bit*
H:
U:
N:
Z:
V:
C:
Half-carry flag
User bit
Negative flag
Zero flag
Overflow flag
Carry flag
Note: * The interrupt mask bit is not available in this LSI.
Figure 2.6 CPU Registers
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Section 2 CPU
2.4.1
General Registers
The H8S/2000 CPU has eight 32-bit general registers. These general registers are all functionally
alike and can be used as both address registers and data registers. When a general register is used
as a data register, it can be accessed as a 32-bit, 16-bit, or 8-bit register. Figure 2.7 illustrates the
usage of the general registers.
When the general registers are used as 32-bit registers or address registers, they are designated by
the letters ER (ER0 to ER7).
The ER registers divide into 16-bit general registers designated by the letters E (E0 to E7) and R
(R0 to R7). These registers are functionally equivalent, providing a maximum sixteen 16-bit
registers. The E registers (E0 to E7) are also referred to as extended registers.
The R registers divide into 8-bit general registers designated by the letters RH (R0H to R7H) and
RL (R0L to R7L). These registers are functionally equivalent, providing a maximum sixteen 8-bit
registers.
The usage of each register can be selected independently.
General register ER7 has the function of stack pointer (SP) in addition to its general-register
function, and is used implicitly in exception handling and subroutine calls. Figure 2.8 shows the
stack.
· Address registers
· 32-bit registers
· 16-bit registers
· 8-bit registers
E registers (extended registers)
(E0 to E7)
ER registers
(ER0 to ER7)
RH registers
(R0H to R7H)
R registers
(R0 to R7)
RL registers
(R0L to R7L)
Figure 2.7 Usage of General Registers
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Section 2 CPU
Free area
SP (ER7)
Stack area
Figure 2.8 Stack Status
2.4.2
Program Counter (PC)
This 24-bit counter indicates the address of the next instruction the CPU will execute. The length
of all CPU instructions is 2 bytes (one word), so the least significant PC bit is ignored (When an
instruction is fetched, the least significant PC bit is regarded as 0).
2.4.3
Extended Control Register (EXR)
EXR is an 8-bit register that manipulates the LDC, STC, ANDC, ORC, and XORC instructions.
When these instructions except for the STC instruction is executed, all interrupts including NMI
will be masked for three states after execution is completed.
Bit
Bit Name
Initial Value
R/W
Description
7
T
0
R/W
Trace Bit
When this bit is set to 1, a trace exception is
generated each time an instruction is
executed. When this bit is cleared to 0,
instructions are executed in sequence.
6 to 3
—
All 1
—
Reserved
These bits are always read as 1.
2
I2
1
R/W
1
I1
1
R/W
0
I0
1
R/W
These bits designate the interrupt mask level
(0 to 7). For details, refer to section 5, Interrupt
Controller.
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Section 2 CPU
2.4.4
Condition-Code Register (CCR)
This 8-bit register contains internal CPU status information, including an interrupt mask bit (I) and
half-carry (H), negative (N), zero (Z), overflow (V), and carry (C) flags.
Operations can be performed on the CCR bits by the LDC, STC, ANDC, ORC, and XORC
instructions. The N, Z, V, and C flags are used as branching conditions for conditional branch
(Bcc) instructions.
Bit
Bit Name
Initial Value
R/W
Description
7
I
1
R/W
Interrupt Mask Bit
Masks interrupts other than NMI when set to 1.
NMI is accepted regardless of the I bit setting.
The I bit is set to 1 by hardware at the start of an
exception-handling sequence. For details, refer
to section 5, Interrupt Controller.
6
UI
undefined
R/W
User Bit or Interrupt Mask Bit
Can be written and read by software using the
LDC, STC, ANDC, ORC, and XORC
instructions. This bit cannot be used as an
interrupt mask bit in this LSI.
5
H
undefined
R/W
Half-Carry Flag
When the ADD.B, ADDX.B, SUB.B, SUBX.B,
CMP.B, or NEG.B instruction is executed, this
flag is set to 1 if there is a carry or borrow at bit
3, and cleared to 0 otherwise. When the
ADD.W, SUB.W, CMP.W, or NEG.W instruction
is executed, the H flag is set to 1 if there is a
carry or borrow at bit 11, and cleared to 0
otherwise. When the ADD.L, SUB.L, CMP.L, or
NEG.L instruction is executed, the H flag is set
to 1 if there is a carry or borrow at bit 27, and
cleared to 0 otherwise.
4
U
undefined
R/W
User Bit
Can be written and read by software using the
LDC, STC, ANDC, ORC, and XORC
instructions.
3
N
undefined
R/W
Negative Flag
Stores the value of the most significant bit of
data as a sign bit.
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Section 2 CPU
Bit
Bit Name
Initial Value
R/W
Description
2
Z
undefined
R/W
Zero Flag
Set to 1 to indicate zero data, and cleared to 0
to indicate non-zero data.
1
V
undefined
R/W
Overflow Flag
Set to 1 when an arithmetic overflow occurs,
and cleared to 0 at other times.
0
C
undefined
R/W
Carry Flag
Set to 1 when a carry occurs, and cleared to 0
otherwise. Used by:
•
Add instructions, to indicate a carry
•
Subtract instructions, to indicate a borrow
•
Shift and rotate instructions, to indicate a
carry
The carry flag is also used as a bit accumulator
by bit manipulation instructions.
2.4.5
Initial Values of CPU Registers
Reset exception handling loads the CPU’s program counter (PC) from the vector table, clears the
trace bit in EXR to 0, and sets the interrupt mask bits in CCR and EXR to 1. The other CCR bits
and the general registers are not initialized. In particular, the stack pointer (ER7) is not initialized.
The stack pointer should therefore be initialized by an MOV.L instruction executed immediately
after a reset.
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Section 2 CPU
2.5
Data Formats
The H8S/2000 CPU can process 1-bit, 4-bit (BCD), 8-bit (byte), 16-bit (word), and 32-bit
(longword) data. Bit-manipulation instructions operate on 1-bit data by accessing bit n (n = 0, 1,
2,…, 7) of byte operand data. The DAA and DAS decimal-adjust instructions treat byte data as
two digits of 4-bit BCD data.
2.5.1
General Register Data Formats
Figure 2.9 shows the data formats in general registers.
Data Type
Register Number
Data Format
7
1-bit data
RnH
1-bit data
RnL
4-bit BCD data
RnH
4-bit BCD data
RnL
Byte data
RnH
0
Don't care
7 6 5 4 3 2 1 0
7
Don't care
7
4 3
Upper
0
7 6 5 4 3 2 1 0
0
Lower
Don't care
7
Don't care
7
4 3
Upper
0
Don't care
MSB
LSB
7
Byte data
RnL
0
Don't care
MSB
Figure 2.9 General Register Data Formats (1)
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0
Lower
LSB
Section 2 CPU
Data Type
Register Number
Word data
Rn
Data Format
15
0
MSB
Word data
15
0
MSB
Longword data
LSB
En
LSB
ERn
31
16 15
MSB
En
0
Rn
LSB
Legend:
ERn: General register ER
En:
General register E
Rn:
General register R
RnH: General register RH
RnL: General register RL
MSB: Most significant bit
LSB: Least significant bit
Figure 2.9 General Register Data Formats (2)
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Section 2 CPU
2.5.2
Memory Data Formats
Figure 2.10 shows the data formats in memory. The H8S/2000 CPU can access word data and
longword data in memory, but word or longword data must begin at an even address. If an attempt
is made to access word or longword data at an odd address, no address error occurs but the least
significant bit of the address is regarded as 0, so the access starts at the preceding address. This
also applies to instruction fetches.
When ER7 is used as an address register to access the stack, the operand size should be word or
longword.
Data Type
Address
1-bit data
Address L
7
Byte data
Address L
MSB
Word data
Address 2M
MSB
Data Format
7
0
6
5
4
3
Address 2N
1
0
LSB
LSB
Address 2M + 1
Longword data
2
MSB
Address 2N + 1
Address 2N + 2
Address 2N + 3
Figure 2.10 Memory Data Formats
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LSB
Section 2 CPU
2.6
Instruction Set
The H8S/2000 CPU has 65 types of instructions. The instructions are classified by function in
table 2.1.
Table 2.1
Instruction Classification
Function
Instructions
Size
Types
Data transfer
MOV
1
1
POP* , PUSH*
B/W/L
5
W/L
LDM, STM
3
3
MOVFPE* , MOVTPE*
Arithmetic
operations
Logic operations
L
B
ADD, SUB, CMP, NEG
B/W/L
ADDX, SUBX, DAA, DAS
B
INC, DEC
B/W/L
ADDS, SUBS
L
MULXU, DIVXU, MULXS, DIVXS
B/W
EXTU, EXTS
4
TAS*
W/L
B
AND, OR, XOR, NOT
B/W/L
19
4
Shift
SHAL, SHAR, SHLL, SHLR, ROTL, ROTR, ROTXL, ROTXR B/W/L
8
Bit manipulation
B
14
Branch
BSET, BCLR, BNOT, BTST, BLD, BILD, BST, BIST, BAND,
BIAND, BOR, BIOR, BXOR, BIXOR
2
Bcc* , JMP, BSR, JSR, RTS

5
System control
TRAPA, RTE, SLEEP, LDC, STC, ANDC, ORC, XORC, NOP 
9

1
Block data transfer EEPMOV
Total: 65
Legend: B: Byte
W: Word
L: Longword
Notes: 1. POP.W Rn and PUSH.W Rn are identical to MOV.W @SP+, Rn and MOV.W Rn,
@-SP. POP.L ERn and PUSH.L ERn are identical to MOV.L @SP+, ERn and MOV.L
ERn, @-SP.
2. Bcc is the general name for conditional branch instructions.
3. Cannot be used in this LSI.
4. Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction.
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Section 2 CPU
2.6.1
Table of Instructions Classified by Function
Tables 2.3 to 2.10 summarize the instructions in each functional category. The notation used in
tables 2.3 to 2.10 is defined below.
Table 2.2
Operation Notation
Symbol
Description
Rd
Rs
General register (destination)*
General register (source)*
Rn
General register*
ERn
General register (32-bit register)
(EAd)
Destination operand
(EAs)
Source operand
EXR
Extended control register
CCR
Condition-code register
N
N (negative) flag in CCR
Z
Z (zero) flag in CCR
V
V (overflow) flag in CCR
C
C (carry) flag in CCR
PC
Program counter
SP
Stack pointer
#IMM
Immediate data
disp
Displacement
+
Addition
–
Subtraction
×
Multiplication
÷
Division
∧
Logical AND
∨
Logical OR
⊕
Logical XOR
→
Move
¬
NOT (logical complement)
:8/:16/:24/:32
Note:
*
8-, 16-, 24-, or 32-bit length
General registers include 8-bit registers (R0H to R7H, R0L to R7L), 16-bit registers (R0
to R7, E0 to E7), and 32-bit registers (ER0 to ER7).
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Section 2 CPU
Table 2.3
Data Transfer Instructions
Instruction
Size*
Function
MOV
B/W/L
(EAs) → Rd, Rs → (EAd)
Moves data between two general registers or between a general register
and memory, or moves immediate data to a general register.
MOVFPE
B
Cannot be used in this LSI.
MOVTPE
B
Cannot be used in this LSI.
POP
W/L
@SP+ → Rn
Pops a general register from the stack. POP.W Rn is identical to MOV.W
@SP+, Rn. POP.L ERn is identical to MOV.L @SP+, ERn.
PUSH
W/L
Rn → @–SP
Pushes a general register onto the stack. PUSH.W Rn is identical to
MOV.W Rn, @–SP. PUSH.L ERn is identical to MOV.L ERn, @–SP.
LDM
L
@SP+ → Rn (register list)
Pops two or more general registers from the stack.
STM
L
Rn (register list) → @–SP
Pushes two or more general registers onto the stack.
Note:
* Refers to the operand size.
B: Byte
W: Word
L: Longword
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Table 2.4
Arithmetic Operations Instructions
Instruction
Size*
Function
ADD
B/W/L
Rd ± Rs → Rd, Rd ± #IMM → Rd
Performs addition or subtraction on data in two general registers, or on
immediate data and data in a general register. (Immediate byte data
cannot be subtracted from byte data in a general register. Use the SUBX
or ADD instruction.)
B
Rd ± Rs ± C → Rd, Rd ± #IMM ± C → Rd
Performs addition or subtraction with carry on byte data in two general
registers, or on immediate data and data in a general register.
B/W/L
Rd ± 1 → Rd, Rd ± 2 → Rd
Increments or decrements a general register by 1 or 2. (Byte operands
can be incremented or decremented by 1 only.)
L
Rd ± 1 → Rd, Rd ± 2 → Rd, Rd ± 4 → Rd
Adds or subtracts the value 1, 2, or 4 to or from data in a 32-bit register.
B
Rd decimal adjust → Rd
Decimal-adjusts an addition or subtraction result in a general register by
referring to the CCR to produce 4-bit BCD data.
MULXU
B/W
Rd × Rs → Rd
Performs unsigned multiplication on data in two general registers: either
8 bits × 8 bits → 16 bits or 16 bits × 16 bits → 32 bits.
MULXS
B/W
Rd × Rs → Rd
Performs signed multiplication on data in two general registers: either 8
bits × 8 bits → 16 bits or 16 bits × 16 bits → 32 bits.
DIVXU
B/W
Rd ÷ Rs → Rd
Performs unsigned division on data in two general registers: either 16
bits ÷ 8 bits → 8-bit quotient and 8-bit remainder or 32 bits ÷ 16 bits →
16-bit quotient and 16-bit remainder.
1
SUB
ADDX
SUBX
INC
DEC
ADDS
SUBS
DAA
DAS
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Section 2 CPU
Instruction
Size*
Function
DIVXS
B/W
Rd ÷ Rs → Rd
Performs signed division on data in two general registers: either 16 bits ÷
8 bits → 8-bit quotient and 8-bit remainder or 32 bits ÷ 16 bits → 16-bit
quotient and 16-bit remainder.
CMP
B/W/L
Rd – Rs, Rd – #IMM
Compares data in a general register with data in another general register
or with immediate data, and sets CCR bits according to the result.
NEG
B/W/L
0 – Rd → Rd
Takes the two’s complement (arithmetic complement) of data in a
general register.
EXTU
W/L
Rd (zero extension) → Rd
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by padding with zeros on the
left.
EXTS
W/L
Rd (sign extension) → Rd
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by extending the sign bit.
TAS*
B
@ERd – 0, 1 → (<bit 7> of @ERd)
Tests memory contents, and sets the most significant bit (bit 7) to 1.
2
1
Notes: 1. Refers to the operand size.
B: Byte
W: Word
L: Longword
2. Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction.
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Table 2.5
Logic Operations Instructions
Instruction
Size*
Function
AND
B/W/L
Rd ∧ Rs → Rd, Rd ∧ #IMM → Rd
Performs a logical AND operation on a general register and another
general register or immediate data.
OR
B/W/L
Rd ∨ Rs → Rd, Rd ∨ #IMM → Rd
Performs a logical OR operation on a general register and another
general register or immediate data.
XOR
B/W/L
Rd ⊕ Rs → Rd, Rd ⊕ #IMM → Rd
Performs a logical exclusive OR operation on a general register and
another general register or immediate data.
NOT
B/W/L
¬ Rd → Rd
Takes the one’s complement of general register contents.
Note:
* Refers to the operand size.
B: Byte
W: Word
L: Longword
Table 2.6
Shift Instructions
Instruction
Size*
Function
SHAL
B/W/L
Rd (shift) → Rd
Performs an arithmetic shift on general register contents.
1-bit or 2-bit shifts are possible.
B/W/L
Rd (shift) → Rd
Performs a logical shift on general register contents.
1-bit or 2-bit shifts are possible.
B/W/L
Rd (rotate) → Rd
Rotates general register contents.
1-bit or 2-bit rotations are possible.
B/W/L
Rd (rotate) → Rd
Rotates general register contents through the carry flag.
1-bit or 2-bit rotations are possible.
SHAR
SHLL
SHLR
ROTL
ROTR
ROTXL
ROTXR
Note:
* Refers to the operand size.
B: Byte
W: Word
L: Longword
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Section 2 CPU
Table 2.7
Bit Manipulation Instructions
Instruction
Size*
Function
BSET
B
1 → (<bit-No.> of <EAd>)
Sets a specified bit in a general register or memory operand to 1. The bit
number is specified by 3-bit immediate data or the lower three bits of a
general register.
BCLR
B
0 → (<bit-No.> of <EAd>)
Clears a specified bit in a general register or memory operand to 0. The
bit number is specified by 3-bit immediate data or the lower three bits of a
general register.
BNOT
B
¬ (<bit-No.> of <EAd>) → (<bit-No.> of <EAd>)
Inverts a specified bit in a general register or memory operand. The bit
number is specified by 3-bit immediate data or the lower three bits of a
general register.
BTST
B
¬ (<bit-No.> of <EAd>) → Z
Tests a specified bit in a general register or memory operand and sets or
clears the Z flag accordingly. The bit number is specified by 3-bit
immediate data or the lower three bits of a general register.
BAND
B
C ∧ (<bit-No.> of <EAd>) → C
ANDs the carry flag with a specified bit in a general register or memory
operand and stores the result in the carry flag.
BIAND
B
C ∧ ¬ (<bit-No.> of <EAd>) → C
ANDs the carry flag with the inverse of a specified bit in a general
register or memory operand and stores the result in the carry flag.
The bit number is specified by 3-bit immediate data.
BOR
B
C ∨ (<bit-No.> of <EAd>) → C
ORs the carry flag with a specified bit in a general register or memory
operand and stores the result in the carry flag.
BIOR
B
C ∨ ¬ (<bit-No.> of <EAd>) → C
ORs the carry flag with the inverse of a specified bit in a general register
or memory operand and stores the result in the carry flag.
The bit number is specified by 3-bit immediate data.
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Instruction
Size*
Function
BXOR
B
C ⊕ (<bit-No.> of <EAd>) → C
XORs the carry flag with a specified bit in a general register or memory
operand and stores the result in the carry flag.
BIXOR
B
C ⊕ ¬ (<bit-No.> of <EAd>) → C
XORs the carry flag with the inverse of a specified bit in a general
register or memory operand and stores the result in the carry flag.
The bit number is specified by 3-bit immediate data.
BLD
B
(<bit-No.> of <EAd>) → C
Transfers a specified bit in a general register or memory operand to the
carry flag.
BILD
B
¬ (<bit-No.> of <EAd>) → C
Transfers the inverse of a specified bit in a general register or memory
operand to the carry flag.
The bit number is specified by 3-bit immediate data.
BST
B
C → (<bit-No.> of <EAd>)
Transfers the carry flag value to a specified bit in a general register or
memory operand.
BIST
B
¬ C → (<bit-No.> of <EAd>)
Transfers the inverse of the carry flag value to a specified bit in a general
register or memory operand.
The bit number is specified by 3-bit immediate data.
Note:
* Refers to the operand size.
B: Byte
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Section 2 CPU
Table 2.8
Branch Instructions
Instruction
Size
Function
Bcc

Branches to a specified address if a specified condition is true. The
branching conditions are listed below.
Mnemonic
Description
Condition
BRA(BT)
Always (true)
Always
BRN(BF)
Never (false)
Never
BHI
High
C∨Z=0
BLS
Low or same
C∨Z=1
BCC(BHS)
Carry clear
(high or same)
C=0
BCS(BLO)
Carry set (low)
C=1
BNE
Not equal
Z=0
BEQ
Equal
Z=1
BVC
Overflow clear
V=0
BVS
Overflow set
V=1
BPL
Plus
N=0
BMI
Minus
N=1
BGE
Greater or equal
N⊕V=0
BLT
Less than
N⊕V=1
BGT
Greater than
Z ∨ (N ⊕ V) = 0
BLE
Less or equal
Z ∨ (N ⊕ V) = 1
JMP

Branches unconditionally to a specified address.
BSR

Branches to a subroutine at a specified address.
JSR

Branches to a subroutine at a specified address.
RTS

Returns from a subroutine
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Section 2 CPU
Table 2.9
System Control Instructions
Instruction
Size*
Function
TRAPA

Starts trap-instruction exception handling.
RTE

Returns from an exception-handling routine.
SLEEP

Causes a transition to a power-down state.
LDC
B/W
(EAs) → CCR, (EAs) → EXR
Moves the source operand contents or immediate data to CCR or EXR.
Although CCR and EXR are 8-bit registers, word-size transfers are
performed between them and memory. The upper 8 bits are valid.
STC
B/W
CCR → (EAd), EXR → (EAd)
Transfers CCR or EXR contents to a general register or memory.
Although CCR and EXR are 8-bit registers, word-size transfers are
performed between them and memory. The upper 8 bits are valid.
ANDC
B
CCR ∧ #IMM → CCR, EXR ∧ #IMM → EXR
Logically ANDs the CCR or EXR contents with immediate data.
ORC
B
CCR ∨ #IMM → CCR, EXR ∨ #IMM → EXR
Logically ORs the CCR or EXR contents with immediate data.
XORC
B
CCR ⊕ #IMM → CCR, EXR ⊕ #IMM → EXR
Logically XORs the CCR or EXR contents with immediate data.
NOP

PC + 2 → PC
Only increments the program counter.
Note:
* Refers to the operand size.
B: Byte
W: Word
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Section 2 CPU
Table 2.10 Block Data Transfer Instructions
Instruction
Size
Function
EEPMOV.B

if R4L ≠ 0 then
Repeat @ER5+ → @ER6+
R4L–1 → R4L
Until R4L = 0
else next;
EEPMOV.W

if R4 ≠ 0 then
Repeat @ER5+ → @ER6+
R4–1 → R4
Until R4 = 0
else next;
Transfers a data block. Starting from the address set in ER5, transfers
data for the number of bytes set in R4L or R4 to the address location set
in ER6.
Execution of the next instruction begins as soon as the transfer is
completed.
2.6.2
Basic Instruction Formats
The H8S/2000 CPU instructions consist of 2-byte (1-word) units. An instruction consists of an
operation field (op), a register field (r), an effective address extension (EA), and a condition field
(cc).
Figure 2.11 shows examples of instruction formats.
• Operation Field
Indicates the function of the instruction, the addressing mode, and the operation to be carried
out on the operand. The operation field always includes the first four bits of the instruction.
Some instructions have two operation fields.
• Register Field
Specifies a general register. Address registers are specified by 3 bits, and data registers by 3
bits or 4 bits. Some instructions have two register fields. Some have no register field.
• Effective Address Extension
8, 16, or 32 bits specifying immediate data, an absolute address, or a displacement.
• Condition Field
Specifies the branching condition of Bcc instructions.
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Section 2 CPU
(1) Operation field only
op
NOP, RTS, etc.
(2) Operation field and register fields
op
rm
rn
ADD.B Rn, Rm, etc.
(3) Operation field, register fields, and effective address extension
op
rn
rm
MOV.B @(d:16, Rn), Rm, etc.
EA(disp)
(4) Operation field, effective address extension, and condition field
op
cc
EA(disp)
BRA d:16, etc.
Figure 2.11 Instruction Formats (Examples)
2.7
Addressing Modes and Effective Address Calculation
The H8S/2000 CPU supports the eight addressing modes listed in table 2.11. Each instruction uses
a subset of these addressing modes. Arithmetic and logic instructions can use the register direct
and immediate modes. Data transfer instructions can use all addressing modes except programcounter relative and memory indirect. Bit manipulation instructions use register direct, register
indirect, or the absolute addressing mode to specify an operand, and register direct (BSET, BCLR,
BNOT, and BTST instructions) or immediate (3-bit) addressing mode to specify a bit number in
the operand.
Table 2.11 Addressing Modes
No.
Addressing Mode
Symbol
1
Register direct
Rn
2
Register indirect
@ERn
3
Register indirect with displacement
@(d:16,ERn)/@(d:32,ERn)
4
Register indirect with post-increment
Register indirect with pre-decrement
@ERn+
@–ERn
5
Absolute address
@aa:8/@aa:16/@aa:24/@aa:32
6
Immediate
#xx:8/#xx:16/#xx:32
7
Program-counter relative
@(d:8,PC)/@(d:16,PC)
8
Memory indirect
@@aa:8
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Section 2 CPU
2.7.1
Register Direct—Rn
The register field of the instruction specifies an 8-, 16-, or 32-bit general register containing the
operand. R0H to R7H and R0L to R7L can be specified as 8-bit registers. R0 to R7 and E0 to E7
can be specified as 16-bit registers. ER0 to ER7 can be specified as 32-bit registers.
2.7.2
Register Indirect—@ERn
The register field of the instruction code specifies an address register (ERn) which contains the
address of the operand on memory. If the address is a program instruction address, the lower 24
bits are valid and the upper 8 bits are all assumed to be 0 (H'00).
2.7.3
Register Indirect with Displacement—@(d:16, ERn) or @(d:32, ERn)
A 16-bit or 32-bit displacement contained in the instruction is added to an address register (ERn)
specified by the register field of the instruction, and the sum gives the address of a memory
operand. A 16-bit displacement is sign-extended when added.
2.7.4
Register Indirect with Post-Increment—@ERn+ or Register Indirect with PreDecrement—@-ERn
Register indirect with post-increment—@ERn+: The register field of the instruction code
specifies an address register (ERn) which contains the address of a memory operand. After the
operand is accessed, 1, 2, or 4 is added to the address register contents and the sum is stored in the
address register. The value added is 1 for byte access, 2 for word transfer instruction, or 4 for
longword transfer instruction. For the word or longword transfer instructions, the register value
should be even.
Register indirect with pre-decrement—@-ERn: The value 1, 2, or 4 is subtracted from an
address register (ERn) specified by the register field in the instruction code, and the result is the
address of a memory operand. The result is also stored in the address register. The value
subtracted is 1 for byte access, 2 for word transfer instruction, or 4 for longword transfer
instruction. For the word or longword transfer instructions, the register value should be even.
2.7.5
Absolute Address—@aa:8, @aa:16, @aa:24, or @aa:32
The instruction code contains the absolute address of a memory operand. The absolute address
may be 8 bits long (@aa:8), 16 bits long (@aa:16), 24 bits long (@aa:24), or 32 bits long
(@aa:32). Table 2.12 indicates the accessible absolute address ranges.
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To access data, the absolute address should be 8 bits (@aa:8), 16 bits (@aa:16), or 32 bits
(@aa:32) long. For an 8-bit absolute address, the upper 24 bits are all assumed to be 1 (H'FFFF).
For a 16-bit absolute address the upper 16 bits are a sign extension. A 32-bit absolute address can
access the entire address space.
A 24-bit absolute address (@aa:24) indicates the address of a program instruction. The upper 8
bits are all assumed to be 0 (H'00).
Table 2.12 Absolute Address Access Ranges
Normal Mode*
Advanced Mode
8 bits (@aa:8)
H'FF00 to H'FFFF
H'FFFF00 to H'FFFFFF
16 bits (@aa:16)
H'0000 to H'FFFF
H'000000 to H'007FFF,
H'FF8000 to H'FFFFFF
Absolute Address
Data address
32 bits (@aa:32)
Program instruction
address
Note:
2.7.6
*
H'000000 to H'FFFFFF
24 bits (@aa:24)
Normal mode is not available in this LSI.
Immediate—#xx:8, #xx:16, or #xx:32
The instruction contains 8-bit (#xx:8), 16-bit (#xx:16), or 32-bit (#xx:32) immediate data as an
operand.
The ADDS, SUBS, INC and DEC instructions contain immediate data implicitly. Some bit
manipulation instructions contain 3-bit immediate data in the instruction code, specifying a bit
number. The TRAPA instruction contains 2-bit immediate data in its instruction code, specifying a
vector address.
2.7.7
Program-Counter Relative—@(d:8, PC) or @(d:16, PC)
This mode is used in the Bcc and BSR instructions. An 8-bit or 16-bit displacement contained in
the instruction is sign-extended and added to the 24-bit PC contents to generate a branch address.
Only the lower 24 bits of this branch address are valid; the upper 8 bits are all assumed to be 0
(H'00). The PC value to which the displacement is added is the address of the first byte of the next
instruction, so the possible branching range is –126 to +128 bytes (–63 to +64 words) or –32766 to
+32768 bytes (–16383 to +16384 words) from the branch instruction. The resulting value should
be an even number.
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2.7.8
Memory Indirect—@@aa:8
This mode can be used by the JMP and JSR instructions. The instruction code contains an 8-bit
absolute address specifying a memory operand. This memory operand contains a branch address.
The upper bits of the absolute address are all assumed to be 0, so the address range is 0 to 255
(H'0000 to H'00FF in normal mode*, H'000000 to H'0000FF in advanced mode). In normal mode,
the memory operand is a word operand and the branch address is 16 bits long. In advanced mode,
the memory operand is a longword operand, the first byte of which is assumed to be 0 (H'00).
Note that the first part of the address range is also the exception vector area. For further details,
refer to section 4, Exception Handling.
If an odd address is specified in word or longword memory access, or as a branch address, the
least significant bit is regarded as 0, causing data to be accessed or instruction code to be fetched
at the address preceding the specified address (For further information, see section 2.5.2, Memory
Data Formats).
Note: * Normal mode is not available in this LSI.
Specified
by @aa:8
Branch address
Specified
by @aa:8
Reserved
Branch address
(a) Normal Mode*
(a) Advanced Mode
Note: * Normal mode is not available in this LSI.
Figure 2.12 Branch Address Specification in Memory Indirect Mode
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2.7.9
Effective Address Calculation
Table 2.13 indicates how effective addresses are calculated in each addressing mode. In normal
mode the upper 8 bits of the effective address are ignored in order to generate a 16-bit address.
Table 2.13 Effective Address Calculation
No
1
Addressing Mode and Instruction Format
op
2
Effective Address Calculation
Effective Address (EA)
Register direct(Rn)
rm
Operand is general register contents.
rn
Register indirect(@ERn)
0
31
op
3
31
24 23
0
Don't care
General register contents
r
Register indirect with displacement
@(d:16,ERn) or @(d:32,ERn)
0
31
General register contents
op
r
31
disp
Sign extension
Register indirect with post-increment or
pre-decrement
· Register indirect with post-increment @ERn+
op
disp
0
31
31
24 23
1, 2, or 4
0
31
General register contents
31
24 23
Don't care
op
0
Don't care
General register contents
r
· Register indirect with pre-decrement @-ERn
0
0
31
4
24 23
Don't care
r
1, 2, or 4
Operand Size
Byte
Word
Longword
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Offset
1
2
4
0
Section 2 CPU
No
5
Addressing Mode and Instruction Format
Effective Address Calculation
Effective Address (EA)
Absolute address
@aa:8
31
op
@aa:16
31
op
0
H'FFFF
24 23
16 15
0
Don't care Sign extension
abs
@aa:24
31
op
8 7
24 23
Don't care
abs
24 23
0
Don't care
abs
@aa:32
op
31
6
Immediate
#xx:8/#xx:16/#xx:32
op
7
Operand is immediate data.
IMM
23
Program-counter relative
0
@(d:8,PC)/@(d:16,PC)
op
PC contents
disp
23
0
31
disp
Sign extension
8
0
24 23
Don't care
abs
0
24 23
Don't care
Memory indirect @@aa:8
• Nomal Mode*
31
op
abs
0
8 7
abs
H'000000
31
24 23
Don't care
16 15
0
H'00
0
15
Memory contents
• Advanced extended modes
31
op
abs
0
8 7
H'000000
abs
31
24 23
0
Don't care
0
31
Memory contents
Note: * Normal mode is not available in this LSI.
Rev. 5.00 Aug 08, 2006 page 95 of 982
REJ09B0054-0500
Section 2 CPU
2.8
Processing States
The H8S/2000 CPU has five main processing states: the reset state, exception handling state,
program execution state, bus-released state, and power-down state. Figure 2.13 indicates the state
transitions.
• Reset State
In this state, the CPU and all on-chip peripheral modules are initialized and not operating.
When the RES input goes low, all current processing stops and the CPU enters the reset state.
All interrupts are masked in the reset state. Reset exception handling starts when the RES
signal changes from low to high. For details, refer to section 4, Exception Handling.
The reset state can also be entered by a watchdog timer overflow.
• Exception-Handling State
The exception-handling state is a transient state that occurs when the CPU alters the normal
processing flow due to an exception source, such as a reset, trace, interrupt, or trap instruction.
The CPU fetches a start address (vector) from the exception vector table and branches to that
address. For further details, refer to section 4, Exception Handling.
• Program Execution State
In this state, the CPU executes program instructions in sequence.
• Bus-Released State
In a product which has a DMA controller (DMAC)* or data transfer controller (DTC), the busreleased state occurs when the bus has been released in response to a bus request from a bus
master other than the CPU.
While the bus is released, the CPU halts operations.
• Power-down State
This is a power-down state in which the CPU stops operating. The program stop state occurs
when a SLEEP instruction is executed or the CPU enters hardware standby mode. For further
details, refer to section 24, Power-Down Modes.
Note: * Supported only by the H8S/2239 Group.
Rev. 5.00 Aug 08, 2006 page 96 of 982
REJ09B0054-0500
Section 2 CPU
End of bus request
Bus request
Program execution state
SLEEP instruction,
SSBY = 0
tio
n
ha
nd
lin
g
s
bu
t
of est
d
es
qu
En requ
re
s
Bu
re
ue
st
fo
n
Re
q
eq
pt r
rru
Inte
t
ues
SLEEP instruction,
SSBY = 1
En
d
o
ha f ex
nd ce
lin p ti
g o
Sleep mode
xc
ep
Bus-released state
Exception handling state
RES = High,
MRES = High
External interrupt request
Software standby mode
STBY = High, RES = Low
Reset state*1
Hardware standby mode*2
Power-down state*3
Notes: 1. From any state except hardware standby mode, a transition to the reset state occurs whenever RES
goes low. A transition can also be made to the reset state when the watchdog timer overflows.
From any state except hardware standby mode and power-on reset state, a transition to the manual
reset state occurs whenever MRES goes low.
2. From any state, a transition to hardware standby mode occurs when STBY goes low.
3. Apart from these states, there are also the watch mode, subactive mode, and the subsleep mode.
See section 24, Power-Down Modes.
Figure 2.13 State Transitions
Rev. 5.00 Aug 08, 2006 page 97 of 982
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Section 2 CPU
2.9
Usage Notes
2.9.1
TAS Instruction
Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction. The TAS
instruction is not generated by the Renesas Technology H8S and H8/300 Series C/C++ compilers.
If the TAS instruction is used as a user-defined intrinsic function, ensure that only register ER0,
ER1, ER4, or ER5 is used.
2.9.2
STM/LDM Instruction
With the STM or LDM instruction, the ER7 register is used as the stack pointer, and thus cannot
be used as a register that allows save (STM) or restore (LDM) operation.
With a single STM or LDM instruction, two to four registers can be saved or restored. The
available registers are as follows:
For two registers: ER0 and ER1, ER2 and ER3, or ER4 and ER5
For three registers: ER0 to ER2, or ER4 to ER6
For four registers: ER0 to ER3
For the Renesas Technology H8S or H8/300 Series C/C++ Compiler, the STM/LDM instruction
including ER7 is not created.
2.9.3
Bit Manipulation Instructions
When a register that includes write-only bits is manipulated by a bit manipulation instruction,
there are cases where the bits manipulated are not manipulated correctly or bits unrelated to the
bits manipulated are changed.
When a register containing write-only bits is read, the value read is either a fixed value or an
undefined value. This means that the bit manipulation instructions that use the value of bits read in
their operation (BNOT, BTST, BAND, BIAND, BOR, BIOR, BXOR, BIXOR, BLD, and BILD)
will not perform correct bit operations.
Also, bit manipulation instructions that perform a write operation on the data read after the
calculation (BSET, BCLR, BNOT, BST, and BIST) may change bits unrelated to the bits
manipulated. Thus extreme care is required when performing bit manipulation instructions on
registers that include write-only bits.
Rev. 5.00 Aug 08, 2006 page 98 of 982
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Section 2 CPU
The BSET, BCLR, BNOT, BST, and BIST instructions perform their operations in the following
order.
1. Read the data in byte units
2. Perform the bit manipulation operation according to the instruction on the data read
3.
Write the data back in byte units
Example: Using the BCLR instruction to clear only bit 4 in the port 1 P1DDR register.
The P1DDR register consists of 8 write-only bits and sets the I/O direction of the port 1 pins.
Reading this register is invalid. When read, the values returned are undefined.
Here we present an example in which P14 is specified to be an input port using the BCLR
instruction. Currently, P17 to P14 are set to be output pins and P13 to P10 are set to be input pins.
At this point, the value of P1DDR is H'F0.
I/O
P1DDR
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Output
Input
Input
Input
Input
1
1
1
1
0
0
0
0
To switch P14 from the Output pin to the input pin function, the value of P1DDR bit 4 must be
changed from 1 to 0 (H'F0 → H'E0). Here we assume that the BCLR instruction is used to clear
P1DDR bit 4.
BCLR
#4,@P1DDR
However if a bit manipulation instruction of the type shown above is used on P1DDR, which is a
write-only register, the following problem may occur.
Although the first thing that happens is that data is read from P1DDR in byte units, the value read
at this time is undefined. An undefined value is a value that is either 0 or 1 in the register but reads
out as an arbitrary value whose relationship to the actual value is unknown. Since the P1DDR bits
are all write-only bits, every bit reads out as an undefined value. Although the actual value of
P1DDR at this point is H'F0, assume that bit 3 becomes a 1 here, and the value read out is H'F8.
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Output
Input
Input
Input
Input
P1DDR
1
1
1
1
0
0
0
0
Read value
1
1
1
1
1
0
0
0
I/O
Rev. 5.00 Aug 08, 2006 page 99 of 982
REJ09B0054-0500
Section 2 CPU
The bit manipulation operation is performed on this value that was read. In this example, bit 4 will
be cleared for H'F8.
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Output
Input
Input
Input
Input
P1DDR
1
1
1
1
0
0
0
0
After bit
manipulation
1
1
1
0
1
0
0
0
I/O
After the bit manipulation operation, this data will be written to P1DDR, and the BCLR
instruction completes.
I/O
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Input
Output
Input
Input
Input
P1DDR
1
1
1
0
1
0
0
0
Write value
1
1
1
0
1
0
0
0
Although the instruction was expected to write H'E0 back to P1DDR, it actually wrote H'E8, and
P13, which was expected to be an input pin, is changed to function as an output pin. While this
section described the case where P13 was read out as a 1, since the values read are undefined
when P17 to P10 are read, when this bit manipulation instruction completes, bits that were 0 may
be changed to 1, and bits that were 1 may be changed to 0. To avoid this sort of problem, see
section 2.9.4, Access Methods for Registers with Write-Only Bits for methods for modifying
registers that include write-only bits.
Also note that it is possible to use the BCLR instruction to clear to 0 flags in internal I/O registers.
In this case, if it is clear from the interrupt handler or other information that the corresponding flag
is set to 1, then there is no need to read the value of the corresponding flag in advance.
2.9.4
Access Methods for Registers with Write-Only Bits
Undefined values will be read out if a data transfer instruction is executed for a register that
includes write-only bits, or if a bit manipulation instruction is executed for a register that includes
write-only bits. To avoid reading undefined values, use methods such as those shown below to
access registers that include write-only bits.
The basic method for writing to a register that includes write-only bits is to create a work area in
internal RAM or other memory area and first write the data to that area. Then, perform the desired
access operation for that memory and finally write that data to the register that includes write-only
bits.
Rev. 5.00 Aug 08, 2006 page 100 of 982
REJ09B0054-0500
Section 2 CPU
Write data to the work area
Initial value write
Write the work area data to the
register that includes write-only bits
Access the work area data
(data transfer and bit manipulation
instructions can be used)
Modifying the value of a register
that includes write-only bits
Write the work area data to the register
that includes write-only bits
Figure 2.14 Flowchart for Access Methods for Registers That Include Write-Only Bits
Example: To clear only bit 4 in the port 1 P1DDR
The P1DDR register consists of 8 write-only bits and sets the I/O direction of the port 1 pins.
Reading this register is invalid. When read, the values returned are undefined.
Here we present an example in which P14 is specified to be an input port using the BCLR
instruction. First, we write the initial value H'F0 written to P1DDR to the work area in RAM
(RAM0).
MOV.B
#H'F0,
R0L
MOV.B
R0L,
@PAM0
MOV.B
R0L,
@P1DDR
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Output
Input
Input
Input
Input
P1DDR
1
1
1
1
0
0
0
0
RAM0
1
1
1
1
0
0
0
0
I/O
Rev. 5.00 Aug 08, 2006 page 101 of 982
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Section 2 CPU
To switch P14 from being an output pin to being an input pin, we must change the value of
P1DDR bit 4 from 1 to 0 (H'F0 → H'E0). Here, were execute a BCLR instruction for RAM0.
BCLR
I/O
#4,
@RAM0
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Output
Input
Input
Input
Input
P1DDR
1
1
1
1
0
0
0
0
RAM0
1
1
1
0
0
0
0
0
Since RAM0 can be read and written, when the bit manipulation instruction is executed, only bit 4
in RAM0 is cleared. Then we write this RAM0 value to P1DDR.
MOV.B
@RAM0,
R0L
MOV.B
R0L,
@P1DDR
P17
P16
P15
P14
P13
P12
P11
P10
Output
Output
Output
Input
Input
Input
Input
Input
P1DDR
1
1
1
0
0
0
0
0
RAM0
1
1
1
0
0
0
0
0
I/O
If this procedure is used to write registers that include write-only bits, programs can be written
without depending on the type of the instructions used.
Rev. 5.00 Aug 08, 2006 page 102 of 982
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Section 3 MCU Operating Modes
Section 3 MCU Operating Modes
3.1
Operating Mode Selection
The LSI supports four operating modes (modes 7 to 4). These operating modes are used to switch
the pin functions. The operating mode is determined by the setting of the mode pins (MD2 to
MD0). Modes 6 to 4 are external extended modes used to access external memory or peripheral
devices. In the external extended modes each area can be specified as an 8-bit or 16-bit address
space using the bus controller after program execution starts. In addition, the 16-bit bus mode is
used if any of the areas is configured as 16-bit address space. The 8-bit bus mode is used if all
areas are configured as 8-bit address space.
Mode 7 does not use external address space. Do not change the mode pin setting during operation.
Table 3.1
MCU Operating Mode Selection
MCU
Operating
CPU Operating
Mode
MD2 MD1 MD0 Mode
External Data Bus
Description
On-chip
ROM
Maximum
Initial Value Value
4
1
0
0
Advanced mode
On-chip ROM
disabled, extended
mode
Disabled
16 bits
16 bits
5
1
0
1
Advanced mode
On-chip ROM
disabled, extended
mode
Disabled
8 bits
16 bits
6
1
1
0
Advanced mode
On-chip ROM
enabled, extended
mode
Enabled
8 bits
16 bits
7
1
1
1
Advanced mode
Single-chip mode
Enabled
—
—
Rev. 5.00 Aug 08, 2006 page 103 of 982
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Section 3 MCU Operating Modes
3.2
Register Descriptions
The following registers are related to the operating mode.
• Mode control register (MDCR)
• System control register (SYSCR)
3.2.1
Mode Control Register (MDCR)
MDCR is used to monitor the current operating mode of this LSI.
Bit
Bit Name
Initial Value R/W
Description
7
—
1
Reserved
—
This bit is always read as 1 and cannot be modified.
6 to 3
—
All 0
—
Reserved
These bits are always read as 0 and cannot be
modified.
R
Mode Select 2 to 0
MDS1
—*
—*
R
MDS0
—*
R
These bits indicate the input levels at pins MD2 to
MD0 (the current operating mode). Bits MDS2 to
MDS0 correspond to MD2 to MD0. MDS2 to MDS0
are read-only bits and they cannot be written to. The
mode pin (MD2 to MD0) input levels are latched into
these bits when MDCR is read.
2
MDS2
1
0
These latches are canceled by a power-on reset, but
maintained at manual reset.
Note:
*
Determined by the MD2 to MD0 pin settings.
Rev. 5.00 Aug 08, 2006 page 104 of 982
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Section 3 MCU Operating Modes
3.2.2
System Control Register (SYSCR)
SYSCR is used to select the interrupt control mode and the detected edge for NMI, select the
MRES input pin enable or disable, and enables or disables on-chip RAM.
Bit
Bit Name
Initial Value R/W
Description
7
—
0
R/W
Reserved
6
—
0
—
Reserved
The write value should always be 0.
These bits are always read as 0 and cannot be
modified.
5
INTM1
0
R/W
4
INTM0
0
R/W
These bits select the control mode of the interrupt
controller. For details of the interrupt control modes,
see section 5.5.1, Interrupt Control Modes and
Interrupt Operation.
00: Interrupt control mode 0 (Interrupt is controlled by
I bit)
01: Setting prohibited
10: Interrupt control mode 2 (Interrupt is controlled by
I2 to I0 bits and IPR)
11: Setting prohibited
3
NMIEG
0
R/W
NMI Edge Select
Selects the valid edge of the NMI interrupt input.
0: An interrupt is requested at the falling edge of NMI
input
1: An interrupt is requested at the rising edge of NMI
input
2
MRESE
0
R/W
Manual Reset Select
Enables or disables the MRES pin input.
0: The MRES pin input (manual reset) is disabled
1: The MRES pin input (manual reset) is enabled
The MRES input pin can be used
1
—
0
—
Reserved
These bits are always read as 0 and cannot be
modified.
0
RAME
1
R/W
RAM Enable
Enables or disables the on-chip RAM. The RAME bit
is initialized when the reset status is released.
0: On-chip RAM is disabled
1: On-chip RAM is enabled
Rev. 5.00 Aug 08, 2006 page 105 of 982
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Section 3 MCU Operating Modes
3.3
Operating Mode Descriptions
3.3.1
Mode 4
The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is disabled.
Pins P13 to P10, and ports A, B, and C function as an address bus, ports D and E function as a
data bus, and part of port F carries bus control signals.
Pins P13 to P11 function as input ports immediately after a reset. Pin 10 and ports A and B
function as address (A20 to A8) outputs immediately after a reset. Address (A23 to A21) output
can be enabled or disabled by bits AE3 to AE0 in the pin function control register (PFCR)
regardless of the corresponding data direction register (DDR) values. Pins for which address
output is disabled among pins P13 to P10 and in ports A and B become port outputs when the
corresponding DDR bits are set to 1.
Port C always has an address (A7 to A0) output function.
The initial bus mode after a reset is 16 bits, with 16-bit access to all areas. However, note that if 8bit access is designated by the bus controller for all areas, the bus mode switches to 8 bits.
3.3.2
Mode 5
The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is disabled.
Pins P13 to P10, and ports A, B, and C function as an address bus, ports D and E function as a
data bus, and part of port F carries bus control signals.
Pins P13 to P11 function as input ports immediately after a reset. Pin 10 and ports A and B
function as address (A20 to A8) outputs immediately after a reset. Address (A23 to A21) output
can be enabled or disabled by bits AE3 to AE0 in the pin function control register (PFCR)
regardless of the corresponding data direction register (DDR) values. Pins for which address
output is disabled among pins P13 to P10 and in ports A and B become port outputs when the
corresponding DDR bits are set to 1.
Port C always has an address (A7 to A0) output function.
The initial bus mode after a reset is 8 bits, with 8-bit access to all areas. However, note that if 16bit access is designated by the bus controller for any area, the bus mode switches to 16 bits and
port E becomes a data bus.
Rev. 5.00 Aug 08, 2006 page 106 of 982
REJ09B0054-0500
Section 3 MCU Operating Modes
3.3.3
Mode 6
The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is enabled.
Pins P13 to P10, and ports A, B, and C function as input ports immediately after a reset. Address
(A23 to A8) output can be enabled or disabled by bits AE3 to AE0 in the pin function control
register (PFCR) regardless of the corresponding data direction register (DDR) values. Pins for
which address output is disabled among pins P13 to P10 and in ports A and B become port outputs
when the corresponding DDR bits are set to 1.
Port C is an input port immediately after a reset. Addresses A7 to A0 are output by setting the
corresponding DDR bits to 1.
Ports D and E function as a data bus, and part of port F carries data bus signals.
The initial bus mode after a reset is 8 bits, with 8-bit access to all areas. However, note that if 16bit access is designated by the bus controller for any area, the bus mode switches to 16 bits and
port E becomes a data bus.
3.3.4
Mode 7
The CPU can access a 16-Mbyte address space in advanced mode. The on-chip ROM is enabled,
but external addresses cannot be accessed.
All I/O ports are available for use as input-output ports.
Rev. 5.00 Aug 08, 2006 page 107 of 982
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Section 3 MCU Operating Modes
3.3.5
Pin Functions
The pin functions of ports 1, and A to F vary depending on the operating mode. Table 3.2 shows
their functions in each operating mode.
Table 3.2
Pin Functions in Each Operating Mode
Port
Mode 4
Mode 5
Mode 6
Mode 7
Port 1
P*/A
P/A*
P*/A
P*/A
P
P10
P*/A
P/A*
PA3 to PA0
P/A*
P/A*
P
Port B
P/A*
P/A*
P*/A
P*/A
Port C
A
A
P*/A
P
Port D
D
Port E
D
P*/D
D
P*/D
P
P/D*
Port F
PF7
P/C*
P/C*
P/C*
P*/C
PF6 to PF4
C
P/C*
P*/C
C
P*/C
C
P*/C
P
PF3
P*/C
P*/C
P
Port A
P13 to P11
PF2 to PF0
Legend:
P: I/O port
A: Address bus output
D: Data bus I/O
C: Control signals, clock I/O
*: After reset
Rev. 5.00 Aug 08, 2006 page 108 of 982
REJ09B0054-0500
P
P
P
P
Section 3 MCU Operating Modes
3.4
Memory Map in Each Operating Mode
Figures 3.1 to 3.9 show the memory map in each operating mode.
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
H'000000
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
External address
space
On-chip ROM
H'03FFFF
H'040000
H'FFB000
External address
space
H'FFB000
On-chip RAM*
H'FFB000
On-chip RAM
On-chip RAM*
H'FFEFBF
H'FFEFC0
External address
space
H'FFF800
H'FFEFC0
Internal I/O registers
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
External address
space
H'FFF800
H'FFF800
External address
space
Internal I/O registers
On-chip RAM*
Internal I/O registers
H'FFFF3F
H'FFFF40
External address
space
H'FFFF60
Internal I/O registers
H'FFFF60
On-chip RAM*
H'FFFFC0
H'FFFFFF
H'FFFFC0
H'FFFFFF
Internal I/O registers
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.1 H8S/2258 Memory Map in Each Operating Mode
Rev. 5.00 Aug 08, 2006 page 109 of 982
REJ09B0054-0500
Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
H'000000
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
External address
space
On-chip ROM
H'01FFFF
H'020000
Reserved
H'040000
External address
space
Reserved*
H'FFB000
Reserved*
H'FFB000
H'FFD000
On-chip RAM*
H'FFD000
H'FFEFC0
External address
space
H'FFEFC0
H'FFF800
On-chip RAM*
External address
space
H'FFF800
Internal I/O registers
H'FFD000
H'FFEFBF
On-chip RAM
H'FFF800
Internal I/O registers
Internal I/O registers
H'FFFF3F
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
External address
space
Internal I/O registers
H'FFFF40
On-chip RAM*
H'FFFFC0
H'FFFFFF
H'FFFF60
External address
space
Internal I/O registers
On-chip RAM*
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.2 H8S/2256 Memory Map in Each Operating Mode
Rev. 5.00 Aug 08, 2006 page 110 of 982
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
H'000000
H'000000
External address
space
Mode 7
(advanced single-chip mode)
On-chip ROM
On-chip ROM
H'05FFFF
H'060000
H'FF7000
External address
space
H'FF7000
H'FF7000
On-chip RAM*
On-chip RAM*
On-chip RAM
H'FFEFBF
H'FFEFC0
External address
space
H'FFF800
H'FFEFC0
H'FFF800
Internal I/O registers
External address
space
H'FFF800
Internal I/O registers
Internal I/O registers
H'FFFF3F
H'FFFF40
External address
space
H'FFFF60
Internal I/O registers
H'FFFFC0
H'FFFFFF
On-chip RAM*
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
External address
space
Internal I/O registers
On-chip RAM*
H'FFFF60
Internal I/O registers
H'FFFFC0
H'FFFFFF
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.3 H8S/2239 Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
H'000000
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
External address
space
On-chip ROM
H'03FFFF
H'040000
H'FFB000
External address
space
H'FFB000
On-chip RAM*
H'FFB000
On-chip RAM
On-chip RAM*
H'FFEFBF
H'FFEFC0
External address
space
H'FFF800
H'FFEFC0
Internal I/O registers
H'FFFF40
External address
space
H'FFFF60
Internal I/O registers
H'FFFFC0
H'FFFFFF
External address
space
H'FFF800
H'FFF800
On-chip RAM*
Internal I/O registers
H'FFFF3F
H'FFFF40
External address
space
H'FFFF60
Internal I/O registers
H'FFFF60
On-chip RAM*
H'FFFFC0
H'FFFFFF
H'FFFFC0
H'FFFFFF
Internal I/O registers
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.4 H8S/2238B and H8S/2238R Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
H'000000
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
External address
space
On-chip ROM
H'01FFFF
H'020000
Reserved
H'040000
External address
space
Reserved*
H'FFB000
Reserved*
H'FFB000
H'FFD000
On-chip RAM*
H'FFD000
H'FFEFC0
External address
space
H'FFEFC0
H'FFF800
On-chip RAM*
External address
space
H'FFF800
Internal I/O registers
H'FFD000
H'FFEFBF
On-chip RAM
H'FFF800
Internal I/O registers
Internal I/O registers
H'FFFF3F
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
External address
space
Internal I/O registers
H'FFFF40
On-chip RAM*
H'FFFFC0
H'FFFFFF
H'FFFF60
External address
space
Internal I/O registers
On-chip RAM*
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.5 H8S/2236B and H8S/2236R Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
H'000000
External address
space
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
On-chip ROM
H'01FFFF
H'020000
External address
space
H'FFB000
H'FFB000
On-chip RAM*
H'FFB000
On-chip RAM*
On-chip RAM
H'FFEFBF
H'FFEFC0
H'FFF800
External address
space
H'FFEFC0
External address
space
H'FFF800
Internal I/O registers
Internal I/O registers
H'FFFF40
External address
space
External address
space
H'FFFF60
Internal I/O registers
H'FFF800
Internal I/O registers
H'FFFF3F
H'FFFFC0
H'FFFFFF
On-chip RAM*
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM*
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.6 H8S/2237 and H8S/2227 Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
H'000000
Mode 6
(advanced extended mode
with on-chip ROM enabled)
On-chip ROM
H'020000
H'FFB000
H'FFE000
H'FFEFC0
H'FFF800
H'000000
H'000000
Exter nal address
space
Reserved*
On-chip RAM*
External address
space
Mode 7
(advanced single-chip mode)
H'FFB000
H'FFE000
H'FFEFC0
On-chip ROM
H'01FFFF
External address
space
Reserved*
On-chip RAM*
External address
space
H'FFF800
Internal I/O registers
Internal I/O registers
H'FFFF40
External address
space
External address
space
H'FFFF60
Internal I/O registers
H'FFE000
H'FFEFBF
On-chip RAM
H'FFF800
Internal I/O registers
H'FFFF3F
H'FFFF40
H'FFFF60
Internal I/O registers
H'FFFF60 Internal I/O registers
H'FFFFC0
H'FFFFFF
H'FFFFC0
H'FFFFC0
On-chip RAM
On-chip RAM*
On-chip RAM*
H'FFFFFF
H'FFFFFF
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.7 H8S/2235 and H8S/2225 Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
H'000000
External address
space
Mode 7
(advanced single-chip mode)
H'000000
On-chip ROM
On-chip ROM
H'017FFF
H'018000
Reserved
H'020000
H'FFB000
H'FFE000
H'FFEFC0
H'FFF800
Reserved*
On-chip RAM*
External address
space
H'FFB000
H'FFE000
H'FFEFC0
External address
space
Reserved*
On-chip RAM*
External address
space
H'FFF800
Internal I/O registers
Intermal I/O registers
H'FFFF40
External address
space
External address
space
H'FFFF60
Internal I/O registers
H'FFE000
H'FFEFBF
On-chip RAM
H'FFF800
Internal I/O registers
H'FFFF3F
H'FFFFC0
H'FFFFFF
On-chip RAM*
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM*
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.8 H8S/2224 Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
Modes 4 and 5
(advanced extended modes
with on-chip ROM disabled)
H'000000
Mode 6
(advanced extended mode
with on-chip ROM enabled)
H'000000
H'000000
External address
space
Mode 7
(advanced single-chip mode)
On-chip ROM
On-chip ROM
H'00FFFF
H'010000
Reserved
H'020000
H'FFB000
H'FFE000
H'FFEFC0
H'FFF800
Reserved*
On-chip RAM*
External address
space
H'FFB000
H'FFE000
H'FFEFC0
External address
space
Reserved*
On-chip RAM*
External address
space
H'FFF800
Internal I/O registers
Internal I/O registers
H'FFFF40
External address
space
External address
space
H'FFFF60
Internal I/O registers
H'FFE000
H'FFEFBF
On-chip RAM
H'FFF800
Internal I/O registers
H'FFFF3F
H'FFFFC0
H'FFFFFF
On-chip RAM*
H'FFFF40
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM*
H'FFFF60
H'FFFFC0
H'FFFFFF
Internal I/O registers
On-chip RAM
Note: * Extermal addresses can be accessed by clearing the RAME bit in SYSCR to 0.
Figure 3.9 H8S/2233 and H8S/2223 Memory Map in Each Operating Mode
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Section 3 MCU Operating Modes
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Section 4 Exception Handling
Section 4 Exception Handling
4.1
Exception Handling Types and Priority
As table 4.1 indicates, exception handling may be caused by a reset, trace, trap instruction, or
interrupt. Exception handling is prioritized as shown in table 4.1. If two or more exceptions occur
simultaneously, they are accepted and processed in order of priority. Trap instruction exception
handling requests are accepted at all times in program execution state.
Exception sources, the stack structure, and operation of the CPU vary depending on the interrupt
control mode set by the INTM1 and INTM0 bits in SYSCR.
Table 4.1
Exception Types and Priority
Priority
Exception Type
Start of Exception Handling
High
Reset
Starts immediately after a low-to-high transition at the RES
or MRES pin, or when the watchdog timer overflows. The
CPU enters the power-on reset state when the RES pin is
low. The CPU enters the manual reset state when the
MRES pin is low.
Trace
Starts when execution of the current instruction or exception
handling ends, if the trace (T) bit in the EXR is set to 1.
Traces are enabled only in interrupt control mode 2. Trace
exception handling is not executed after execution of an
RTE instruction.
Interrupt
Starts when execution of the current instruction or exception
handling ends, if an interrupt request has been issued.
Interrupt detection is not performed on completion of ANDC,
ORC, XORC, or LDC instruction execution, or on
completion of reset exception handling.
Trap instruction
(TRAPA)
Started by execution of a trap instruction (TRAPA). Trap
instruction exception handling requests are accepted at all
times in program execution state.
Low
4.2
Exception Sources and Exception Vector Table
Different vector addresses are assigned to different exception sources. Table 4.2 lists the exception
sources and their vector addresses.
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Section 4 Exception Handling
Table 4.2
Exception Handling Vector Table
Exception Source
Vector Number
Vector Address
1
Advanced Mode*
Power-on reset
0
H'0000 to H'0003
Manual reset
1
H'0004 to H'0007
Reserved for system use
2
H'0008 to H'000B
3
H'000C to H'000F
4
H'0010 to H'0013
5
H'0014 to H'0017
Direct transitions*
6
H'0018 to H'001B
External interrupt (NMI)
7
H'001C to H'001F
Trap instruction (four sources)
8
H'0020 to H'0023
9
H'0024 to H'0027
10
H'0028 to H'002B
11
H'002C to H'002F
12
H'0030 to H'0033
13
H'0034 to H'0037
14
H'0038 to H'003B
15
H'003C to H'003F
IRQ0
16
H'0040 to H'0043
IRQ1
17
H'0044 to H'0047
IRQ2
18
H'0048 to H'004B
IRQ3
19
H'004C to H'004F
IRQ4
20
H'0050 to H'0053
IRQ5
21
H'0054 to H'0057
IRQ6
22
H'0058 to H'005B
IRQ7
23
H'005C to H'005F
24

123
H'0060 to H'0063

H'01EC to H'01EF
Trace
3
Reserved for system use
External interrupt
Internal interrupt
*2
Notes: 1. Lower 16 bits of the address.
2. For details of internal interrupt vectors, see section 5.4.3, Interrupt Exception Handling
Vector Table.
3. For details on direct transitions, see section 24.10, Direct Transitions.
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Section 4 Exception Handling
4.3
Reset
A reset has the highest exception priority.
When the RES or MRES pin goes low, all processing halts and this LSI enters the reset. A reset
initializes the internal state of the CPU and the registers of on-chip peripheral modules. The
interrupt control mode is 0 immediately after reset.
When the RES or MRES pin goes high from the low state, this LSI starts reset exception handling.
The chip can also be reset by overflow of the watchdog timer. For details see section 13,
Watchdog Timer (WDT).
4.3.1
Reset Types
The power-on reset and the manual reset are available as the reset.
Table 4.3 lists the reset types. When the power is supplied, select the power-on reset.
Both the power-on reset and the manual reset initialize the internal state of the CPU. The poweron reset initializes all registers in on-chip peripheral modules. The manual reset initializes the
registers in on-chip peripheral modules except the bus controller and the I/O ports. The state of the
bus controller and the I/O ports are maintained.
At the manual reset, the on-chip peripheral modules are initialized. Thus, the ports that are used as
I/O pins for the on-chip peripheral modules are changed to the ports controlled by the DDR and
the DR.
Table 4.3
Reset Types
Condition
to Enter Reset
Internal State
Reset
MRES
RES
CPU
Internal Peripheral Modules
Power-on reset
×
Low
Initialized
Initialized
Manual reset
Low
High
Initialized
Initialized except the bus controller and the
I/O ports
Legend: ×:Don’t care
The power-on reset and the manual reset are also available for the reset by the watchdog timer.
To enable the MRES pin, set the MRESE bit in SYSCR to 1.
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Section 4 Exception Handling
4.3.2
Reset Exception Handling
When the RES or MRES pin goes low, this LSI enters the reset. To ensure that this LSI is reset,
hold the RES pin low for at least 20 ms at power-up. To reset the chip during operation, hold the
RES or MRES pin low for at least 20 states. When the RES or MRES pin goes high after being
held low for the necessary time, this LSI starts reset exception handling as follows.
1. The internal state of the CPU and the registers of the on-chip peripheral modules are
initialized, the T bit in EXR is cleared to 0, and the I bits in EXR and CCR are set to 1.
2. The reset exception handling vector address is read and transferred to the PC, and program
execution starts from the address indicated by the PC.
Figures 4.1 shows an example of the reset sequence.
Prefetch of first
Internal
processing program instruction
Vector fetch
*
*
*
φ
RES, MRES
Address bus
(1)
(3)
(5)
RD
High
HWR, LWR
D15 to D0
(2)
(4)
(6)
(1)(3) Reset exception handling vector address (at power on reset, (1) = H'000000, (3) = H'000002,
at manual reset, (1) = H'000004, (3) = H'000006)
(2)(4) Start address (contents of reset exception handling vector address)
(5)
Start address ((5) = (2) (4))
(6)
First program instruction
Note: * Three states are inserted for waiting.
Figure 4.1 Reset Sequence (Mode 4)
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Section 4 Exception Handling
4.3.3
Interrupts after Reset
If an interrupt is accepted after a reset and before the stack pointer (SP) is initialized, the PC and
CCR will not be saved correctly, leading to a program crash. To prevent this, all interrupt requests,
including NMI, are disabled immediately after a reset. Since the first instruction of a program is
always executed immediately after the reset state ends, make sure that this instruction initializes
the stack pointer (example: MOV.L #xx,SP).
4.3.4
State of On-Chip Peripheral Modules after Reset Release
After reset release, MSTPCRA is initialized to H'3F, MSTPCRB and MSTPCRC are initialized to
H'FF, and all modules except the DMAC* and DTC enter module stop mode. Consequently, onchip peripheral module registers cannot be read or written to. Register reading and writing is
enabled when the module stop mode is exited.
Note: * Supported only by the H8S/2239 Group.
4.4
Traces
Traces are enabled in interrupt control mode 2. Trace mode is not activated in interrupt control
mode 0, irrespective of the state of the T bit. For details of interrupt control modes, see section 5,
Interrupt Controller.
If the T bit in EXR is set to 1, trace mode is activated. In trace mode, a trace exception occurs on
completion of each instruction. Trace mode is not affected by interrupt masking. Table 4.4 shows
the state of CCR and EXR after execution of trace exception handling. Trace mode is canceled by
clearing the T bit in EXR to 0. Interrupts are accepted even within the trace exception handling
routine.
The T bit saved on the stack retains its value of 1, and when control is returned from the trace
exception handling routine by the RTE instruction, trace mode resumes. Trace exception handling
is not carried out after execution of the RTE instruction.
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Section 4 Exception Handling
Table 4.4
Status of CCR and EXR after Trace Exception Handling
CCR
EXR
Interrupt Control Mode
I
UI
0
Trace exception handling cannot be used.
2
1
—
I2 to I0
—
T
0
Legend:
1:
0:
—:
4.5
Set to 1
Cleared to 0
Retains value prior to execution
Interrupts
Interrupts are controlled by the interrupt controller. The interrupt control has two interrupt control
modes and can assign interrupts other than NMI to eight priority/mask levels to enable
multiplexed interrupt control. For details, refer to section 5, Interrupt Controller.
Interrupt exception handling is conducted as follows:
1. The values in the program counter (PC), condition code register (CCR), and extended control
register (EXR) are saved to the stack.
2. The interrupt mask bit is updated and the T bit is cleared to 0.
3. A vector address corresponding to the interrupt source is generated, the start address is loaded
from the vector table to the PC, and program execution begins from that address.
4.6
Trap Instruction
Trap instruction exception handling starts when a TRAPA instruction is executed. Trap instruction
exception handling can be executed at all times in the program execution state.
Trap instruction exception handling is conducted as follows:
1. The values in the program counter (PC), condition code register (CCR), and extended control
register (EXR) are saved to the stack.
2. The interrupt mask bit is updated and the T bit is cleared to 0.
3. A vector address corresponding to the interrupt source is generated, the start address is loaded
from the vector table to the PC, and program execution starts from that address.
The TRAPA instruction fetches a start address from a vector table entry corresponding to a vector
number from 0 to 3, as specified in the instruction code.
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Section 4 Exception Handling
Table 4.5 shows the status of CCR and EXR after execution of trap instruction exception handling.
Table 4.5
Status of CCR and EXR after Trap Instruction Exception Handling
CCR
EXR
Interrupt Control Mode
I
UI
I2 to I0
T
0
1
—
—
—
2
1
—
—
0
Legend:
1:
Set to 1
0:
Cleared to 0
—:
Retains value prior to execution
4.7
Stack Status after Exception Handling
Figures 4.2 shows the stack after completion of trap instruction exception handling and interrupt
exception handling.
SP
EXR
Reserved*
SP
CCR
CCR
PC
(24 bits)
PC
(24 bits)
(a) Interrupt control mode 0
(b) Interrupt control mode 2
Note: * Ignored on return
Figure 4.2 Stack Status after Exception Handling (Advanced Mode)
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Section 4 Exception Handling
4.8
Usage Note
When accessing word data or longword data, this LSI assumes that the lowest address bit is 0. The
stack should always be accessed by word transfer instruction or longword transfer instruction, and
the value of the stack pointer (SP, ER7) should always be kept even. Use the following
instructions to save registers:
PUSH.W
Rn
(or MOV.W Rn, @-SP)
PUSH.L
ERn
(or MOV.L ERn, @-SP)
Use the following instructions to restore registers:
POP.W
Rn
(or MOV.W @SP+, Rn)
POP.L
ERn
(or MOV.L @SP+, ERn)
Setting SP to an odd value may lead to a malfunction. Figure 4.3 shows an example of what
happens when the SP value is odd.
CCR
SP
R1L
H'FFFEFA
H'FFFEFB
SP
PC
PC
H'FFFEFC
H'FFFEFD
H'FFFEFF
SP
TRAP instruction executed
SP set to H'FFFEFF
MOV.B R1L, @-ER7 executed
Data saved above SP
Contents of CCR lost
Legend:
CCR:
PC:
R1L:
SP:
Condition code register
Program counter
General register R1L
Stack pointer
Note: This diagram illustrates an example in which the interrupt control mode is 0, in advanced mode.
Figure 4.3 Operation When SP Value Is Odd
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Section 5 Interrupt Controller
Section 5 Interrupt Controller
5.1
Features
This LSI controls interrupts with the interrupt controller. The interrupt controller has the following
features:
• Two interrupt control modes
 Any of two interrupt control modes can be set by means of the INTM1 and INTM0 bits in
the system control register (SYSCR).
• Priorities settable with IPR
 An interrupt priority register (IPR) is provided for setting interrupt priorities. Eight priority
levels can be set for each module for all interrupts except NMI. NMI is assigned the
highest priority level of 8, also accepted (using nesting) during interrupt processing.
Additionally accepted during state 12 if Opcode = H'57F3.
• Independent vector addresses
 All interrupt sources are assigned independent vector addresses, making it unnecessary for
the source to be identified in the interrupt handling routine.
• Nine external interrupts
 NMI is the highest-priority interrupt, and is accepted at all times. Rising edge or falling
edge can be selected for NMI. Falling edge, rising edge, or both edge detection, or level
sensing, can be independently selected for IRQ7 to IRQ0.
• DTC and DMAC* control
 The DTC and DMAC* can be activated by an interrupt request.
Note: * Supported only by the H8S/2239 Group.
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Section 5 Interrupt Controller
A block diagram of the interrupt controller is shown in figure 5.1.
CPU
INTM1, INTM0
SYSCR
NMIEG
NMI input
NMI input unit
IRQ input
IRQ input unit
ISR
ISCR
IER
Interrupt
request
Vector number
Priority
determination
I
CCR
Internal interrupt
request
SWDTEND to TEI3
I2 to I0
IPR
Interrupt controller
Legend:
ISCR:
IER:
ISR:
IPR:
SYSCR:
IRQ sense control register
IRQ enable register
IRQ status register
Interrupt priority register
System control register
Figure 5.1 Block Diagram of Interrupt Controller
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EXR
Section 5 Interrupt Controller
5.2
Input/Output Pins
Table 5.1 summarizes the pins of the interrupt controller.
Table 5.1
Pin Configuration
Name
I/O
Function
NMI
Input
Nonmaskable external interrupt.
Rising or falling edge can be selected.
IRQ7
Input
IRQ6
Input
Maskable external interrupts.
Rising, falling, or both edges, or level sensing can be selected.
IRQ5
Input
IRQ4
Input
IRQ3
Input
IRQ2
Input
IRQ1
Input
IRQ0
Input
5.3
Register Descriptions
The interrupt controller has the following registers. For the system control register, see section
3.2.2, System Control Register (SYSCR).
• System control register (SYSCR)
• IRQ sense control register H (ISCRH)
• IRQ sense control register L (ISCRL)
• IRQ enable register (IER)
• IRQ status register (ISR)
• Interrupt priority register A (IPRA)
• Interrupt priority register B (IPRB)
• Interrupt priority register C (IPRC)
• Interrupt priority register D (IPRD)
• Interrupt priority register E (IPRE)
• Interrupt priority register F (IPRF)
• Interrupt priority register G (IPRG)
• Interrupt priority register H (IPRH)
• Interrupt priority register I (IPRI)
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Section 5 Interrupt Controller
• Interrupt priority register J (IPRJ)
• Interrupt priority register K (IPRK)
• Interrupt priority register L (IPRL)
• Interrupt priority register O (IPRO)
5.3.1
Interrupt Priority Registers A to L, and O (IPRA to IPRL, IPRO)
The IPR registers are thirteen 8-bit readable/writable registers that set priorities (levels 7 to 0) for
interrupt sources other than NMI. The correspondence between interrupt sources and IPR settings
is shown in table 5.2. Setting a value in the range from H'0 to H'7 in the 3-bit groups of bits 0 to 2
and 4 to 6 sets the priority of the corresponding interrupt.
Bit
Bit Name
Initial
Value
R/W
Description
7

0

Reserved
This bit is always read as 0, and cannot be modified.
6
IPR6
1
R/W
Sets the priority of the corresponding interrupt source
5
IPR5
1
R/W
000: Priority level 0 (Lowest)
4
IPR4
1
R/W
001: Priority level 1
010: Priority level 2
011: Priority level 3
100: Priority level 4
101: Priority level 5
110: Priority level 6
111: Priority level 7 (Highest)
3

0

Reserved
This bit is always read as 0, and cannot be modified.
2
IPR2
1
R/W
Sets the priority of the corresponding interrupt source.
1
IPR1
1
R/W
000: Priority level 0 (Lowest)
0
IPR0
1
R/W
001: Priority level 1
010: Priority level 2
011: Priority level 3
100: Priority level 4
101: Priority level 5
110: Priority level 6
111: Priority level 7 (Highest)
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Section 5 Interrupt Controller
5.3.2
IRQ Enable Register (IER)
IER controls the enabling and disabling of interrupt requests IRQn (n = 7 to 0).
Bit
Bit Name
Initial
Value
R/W
Description
7
IRQ7E
0
R/W
IRQ7 Enable
6
IRQ6E
0
R/W
IRQ6 Enable
The IRQ7 interrupt request is enabled when this bit is 1.
The IRQ6 interrupt request is enabled when this bit is 1.
5
IRQ5E
0
R/W
IRQ5 Enable
The IRQ5 interrupt request is enabled when this bit is 1.
4
IRQ4E
0
R/W
IRQ4 Enable
The IRQ4 interrupt request is enabled when this bit is 1.
3
IRQ3E
0
R/W
IRQ3 Enable
The IRQ3 interrupt request is enabled when this bit is 1.
2
IRQ2E
0
R/W
IRQ2 Enable
The IRQ2 interrupt request is enabled when this bit is 1.
1
IRQ1E
0
R/W
IRQ1 Enable
The IRQ1 interrupt request is enabled when this bit is 1.
0
IRQ0E
0
R/W
IRQ0 Enable
The IRQ0 interrupt request is enabled when this bit is 1.
5.3.3
IRQ Sense Control Registers H and L (ISCRH and ISCRL)
The ISCR registers select the source that generates an interrupt request at pins IRQn (n = 7 to 0).
Specifiable sources are the falling edge, rising edge, or both edge detection, and level sensing.
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Section 5 Interrupt Controller
Bit
Bit Name
Initial
Value
R/W
Description
15
IRQ7SCB
0
R/W
14
IRQ7SCA
0
R/W
IRQ7 Sense Control B
IRQ7 Sense Control A
00: Interrupt request generated at IRQ7 input level low
01: Interrupt request generated at falling edge of IRQ7
input
10: Interrupt request generated at rising edge of IRQ7
input
11: Interrupt request generated at both falling and rising
edges of IRQ7 input
13
IRQ6SCB
0
R/W
12
IRQ6SCA
0
R/W
IRQ6 Sense Control B
IRQ6 Sense Control A
00: Interrupt request generated at IRQ6 input level low
01: Interrupt request generated at falling edge of IRQ6
input
10: Interrupt request generated at rising edge of IRQ6
input
11: Interrupt request generated at both falling and rising
edges of IRQ6 input
11
IRQ5SCB
0
R/W
10
IRQ5SCA
0
R/W
IRQ5 Sense Control B
IRQ5 Sense Control A
00: Interrupt request generated at IRQ5 input level low
01: Interrupt request generated at falling edge of IRQ5
input
10: Interrupt request generated at rising edge of IRQ5
input
11: Interrupt request generated at both falling and rising
edges of IRQ5 input
9
IRQ4SCB
0
R/W
8
IRQ4SCA
0
R/W
IRQ4 Sense Control B
IRQ4 Sense Control A
00: Interrupt request generated at IRQ4 input level low
01: Interrupt request generated at falling edge of IRQ4
input
10: Interrupt request generated at rising edge of IRQ4
input
11: Interrupt request generated at both falling and rising
edges of IRQ4 input
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Section 5 Interrupt Controller
Bit
Bit Name
Initial
Value
R/W
Description
7
IRQ3SCB
0
R/W
6
IRQ3SCA
0
R/W
IRQ3 Sense Control B
IRQ3 Sense Control A
00: Interrupt request generated at IRQ3 input level
low
01: Interrupt request generated at falling edge of
IRQ3 input
10: Interrupt request generated at rising edge of IRQ3
input
11: Interrupt request generated at both falling and
rising edges of IRQ3 input
5
IRQ2SCB
0
R/W
4
IRQ2SCA
0
R/W
IRQ2 Sense Control B
IRQ2 Sense Control A
00: Interrupt request generated at IRQ2 input level
low
01: Interrupt request generated at falling edge of
IRQ2 input
10: Interrupt request generated at rising edge of IRQ2
input
11: Interrupt request generated at both falling and
rising edges of IRQ2 input
3
IRQ1SCB
0
R/W
2
IRQ1SCA
0
R/W
IRQ1 Sense Control B
IRQ1 Sense Control A
00: Interrupt request generated at IRQ1 input level
low
01: Interrupt request generated at falling edge of
IRQ1 input
10: Interrupt request generated at rising edge of IRQ1
input
11: Interrupt request generated at both falling and
rising edges of IRQ1 input
1
IRQ0SCB
0
R/W
0
IRQ0SCA
0
R/W
IRQ0 Sense Control B
IRQ0 Sense Control A
00: Interrupt request generated at IRQ0 input level
low
01: Interrupt request generated at falling edge of
IRQ0 input
10: Interrupt request generated at rising edge of IRQ0
input
11: Interrupt request generated at both falling and
rising edges of IRQ0 input
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Section 5 Interrupt Controller
5.3.4
IRQ Status Register (ISR)
ISR indicates the status of IRQn (n = 7 to 0) interrupt requests.
Bit
7
Bit Name
IRQ7F
Initial
Value
R/W
Description
0
R/W *
IRQ7 to IRQ0 Flags
Indicates the status of IRQ7 to IRQ0 interrupt requests.
[Setting condition]
6
IRQ6F
0
R/W *
5
IRQ5F
0
4
IRQ4F
0
R/W *
R/W *
3
IRQ3F
0
R/W *
2
IRQ2F
0
1
IRQ1F
0
R/W *
R/W *
0
IRQ0F
0
R/W *
Note:
*
When the interrupt source selected by the ISCRH, or
ISCRL occurs
[Clearing conditions]
•
Cleared by reading IRQnF flag when IRQnF = 1, then
writing 0 to IRQnF flag
•
When interrupt exception handling is executed when
low-level detection is set and IRQn input is high level
•
When IRQn interrupt exception handling is executed
when falling, rising, or both-edge detection is set
•
When the DTC is activated by an IRQn interrupt, and
the DISEL bit in MRB of the DTC is cleared to 0
Only 0 can be written to this bit to clear the flag.
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Section 5 Interrupt Controller
5.4
Interrupt Sources
5.4.1
External Interrupts
There are nine external interrupts: NMI and IRQ7 to IRQ0. These interrupts can be used to restore
this LSI from software standby mode.
NMI Interrupt: NMI is the highest-priority interrupt, and is always accepted by the CPU
regardless of the interrupt control mode or the status of the CPU interrupt mask bits. The NMIEG
bit in SYSCR can be used to select whether an interrupt is requested at a rising edge or a falling
edge on the NMI pin.
IRQn Interrupts (n = 7 to 0): IRQn interrupts are requested by an input signal at IRQn pins.
IRQn interrupts have the following features:
• Using ISCR, it is possible to select whether an interrupt is generated by a low level, falling
edge, rising edge, or both edges, at IRQn pins.
• Enabling or disabling of IRQn interrupt requests can be selected with IER.
• The interrupt priority level can be set with IPR.
• The status of IRQn interrupt requests is indicated in ISR. ISR flags can be cleared to 0 by
software.
A block diagram of IRQn interrupts is shown in figure 5.2.
IRQnE
IRQnSCA, IRQnSCB
IRQnF
Edge/level
detection circuit
S
Q
IRQn interrupt
request
R
IRQn input
Clear signal
Note: n = 7 to 0
Figure 5.2 Block Diagram of IRQn Interrupts
The set timing for IRQnF is shown in figure 5.3.
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Section 5 Interrupt Controller
φ
IRQn
input pin
IRQnF
Note: n = 7 to 0
Figure 5.3 Set Timing for IRQnF
The detection of IRQn interrupts does not depend on whether the relevant pin has been set for
input or output. However, when a pin is used as an external interrupt input pin, do not clear the
corresponding DDR to 0; and use the pin as an I/O pin for another function. IRQnF interrupt
request flag is set to 1 when the setting condition is satisfied, regardless of IER settings.
Accordingly, refer to only necessary flags.
5.4.2
Internal Interrupts
Internal interrupts that are requested from the on-chip peripheral modules have the following
features.
• For each on-chip peripheral module, there are flags that indicate the interrupt request status,
and enable bits that select enabling or disabling of these interrupts, and they are masked
independently. If the enable bit is set to 1 for a particular interrupt source, an interrupt request
is issued to the interrupt controller.
• The interrupt priority level can be set with IPR.
• TPU and SCI interrupt requests can activate the DMAC* or DTC. When the DMAC* or DTC
is activated by the interrupt request, the interrupt control mode and CPU interrupt mask bits are
disregarded.
Note: * Supported only by the H8S/2239 Group.
5.4.3
Interrupt Exception Handling Vector Table
Table 5.2 shows interrupt exception handling sources, vector addresses, and interrupt priorities.
For default priorities, the lower the vector number, the higher the priority.
Priorities among modules can be set by means of the IPR. Modules set at the same priority will
conform to their default priorities. Priorities within a module are fixed.
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Section 5 Interrupt Controller
Table 5.2
Interrupt Sources, Vector Addresses, and Interrupt Priorities
Vector
Address*1
Interrupt Source
Origin of
Interrupt Source
Vector
Number
Advanced
Mode
External Pin
NMI
7
H'001C
IRQ0
16
H'0040
IPRA6 to IPRA4
IRQ1
17
H'0044
IPRA2 to IPRA0
IRQ2
18
H'0048
IPRB6 to IPRB4
IRQ3
19
H'004C
IRQ4
20
H'0050
IRQ5
21
H'0054
IRQ6
22
H'0058
IRQ7
23
H'005C
DTC
SWDTEND
(completion of software
initiation data transfer)
24
H'0060
IPRC2 to IPRC0
Watchdog timer 0
WOVI0
(interval timer 0)
25
H'0064
IPRD6 to IPRD4
PC break
PC break
27
H'006C
IPRE6 to IPRE4
A/D
ADI (completion of A/D
conversion)
28
H'0070
IPRE2 to IPRE0
Watchdog timer 1
WOVI1
(interval timer 1)
29
H'0074

Reserved
30
31
H'0078
H'007C
TPU channel 0
TGI0A (TGR0A input
capture/compare-match)
32
H'0080
TGI0B (TGR0B input
capture/compare-match)
33
H'0084
TGI0C (TGR0C input
capture/compare-match)
34
H'0088
IPR*2
Priority
High
IPRB2 to IPRB0
IPRC6 to IPRC4
IPRF6 to IPRF4
Low
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Section 5 Interrupt Controller
Vector
Address*1
Origin of
Interrupt Source
Vector
Number
Advanced
Mode
IPR*2
Priority
TGI0D (TGR0D input
capture/compare-match)
35
H'008C
IPRF6 to IPRF4
High
TCI0V (overflow 0)
36
H'0090

Reserved
37
38
39
H'0094
H'0098
H'009C
TPU channel 1
TGI1A (TGR1A input
capture/compare-match)
40
H'00A0
TGI1B (TGR1B input
capture/compare-match)
41
H'00A4
TCI1V (overflow 1)
42
H'00A8
TCI1U (underflow 1)
43
H'00AC
TGI2A (TGR2A input
capture/compare-match)
44
H'00B0
TGI2B (TGR2B input
capture/compare-match)
45
H'00B4
TCI2V (overflow 2)
46
H'00B8
TCI2U (underflow 2)
47
H'00BC
TGI3A (TGR3A input
capture/compare-match)
48
H'00C0
TGI3B (TGR3B input
capture/compare-match)
49
H'00C4
TGI3C (TGR3C input
capture/compare-match)
50
H'00C8
TGI3D (TGR3D input
capture/compare-match)
51
H'00CC
TCI3V (overflow 3)
52
H'00D0
Interrupt Source
TPU channel 0
TPU channel 2
TPU channel 3*3
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IPRF2 to IPRF0
IPRG6 to IPRG4
IPRG2 to IPRG0
Low
Section 5 Interrupt Controller
Vector
Address*1
Interrupt Source
Origin of
Interrupt Source
Vector
Number
Advanced
Mode
IPR*2
Priority

Reserved
53
H'00D4
IPRG2 to IPRG0
High
54
H'00D8
55
H'00DC
TGI4A (TGR4A input
capture/compare-match)
56
H'00E0
TGI4B (TGR4B input
capture/compare-match)
57
H'00E4
TCI4V (overflow 4)
58
H'00E8
TCI4U (underflow 4)
59
H'00EC
TGI5A (TGR5A input
capture/compare-match)
60
H'00F0
TGI5B (TGR5B input
capture/compare-match)
61
H'00F4
TCI5V (overflow 5)
62
H'00F8
TCI5U (underflow 5)
63
H'00FC
CMIA0 (compare-match A0)
64
H'0100
CMIB0 (compare-match B0)
65
H'0104
OVI0 (overflow 0)
66
H'0108

Reserved
67
H'010C
8-bit timer channel 1
CMIA1 (compare-match A1)
68
H'0110
CMIB1 (compare-match B1)
69
H'0114
OVI1 (overflow 1)
70
H'0118
Reserved
71
H'011C
*3
TPU channel 4
*3
TPU channel 5
8-bit timer channel 0

IPRH6 to IPRH4
IPRH2 to IPRH0
IPRI6 to IPRI4
IPRI2 to IPRI0
Low
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Section 5 Interrupt Controller
Vector
Address*1
Interrupt Source
DMAC*5
SCI
channel 0
SCI
channel 1
SCI
channel 2*3
Origin of
Interrupt Source
Vector
Number
Advanced
Mode
IPR*2
Priority
DEND0A (completion of
72
channel 0/channel 0A transfer)
H'0120
IPRJ6 to IPRJ4
High
DEND0B (completion of
channel 0B transfer)
73
H'0124
DEND1A (completion of
74
channel 1/channel 1A transfer)
H'0128
DEND1B (completion of
channel 1B transfer)
75
H'012C
ERI0 (receive error 0)
80
H'0140
RXI0 (receive completion 0)
81
H'0144
TXI0 (transmit data empty 0)
82
H'0148
TEI0 (transmit end 0)
83
H'014C
ERI1 (receive error 1)
84
H'0150
RXI1 (receive completion 1)
85
H'0154
TXI1 (transmit data empty 1)
86
H'0158
TEI1 (transmit end 1)
87
H'015C
ERI2 (receive error 2)
88
H'0160
RXI2 (receive completion 2)
89
H'0164
TXI2 (transmit data empty 2)
90
H'0168
TEI2 (transmit end 2)
91
H'016C
8-bit timer channel 2*4 CMIA2 (compare-match A2)
92
H'0170
CMIB2 (compare-match B2)
93
H'0174
OVI2 (overflow 2)
94
H'0178
Reserved
95
H'017C

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IPRJ2 to IPRJ0
IPRK6 to IPRK4
IPRK2 to IPRK0
IPRL6 to IPRL4
Low
Section 5 Interrupt Controller
Vector
Address*1
Interrupt Source
Origin of
Interrupt Source
Vector
Number
Advanced
Mode
IPR*2
Priority
IPRL6 to IPRL4
High
8-bit timer channel 3*4 CMIA3 (compare-match A3)
96
H'0180
CMIB3 (compare-match B3)
97
H'0184
OVI3 (overflow 3)
98
H'0188
Reserved
99
H'018C
IICI0 (1-byte transmission/
reception completion)
100
H'0190
Reserved
101
H'0194
IICI1 (1-byte transmission/
reception completion)
102
H'0198
Reserved
103
H'019C
IEBSI (receive status)
104
H'01A0
IERxI (RxRDY)
105
H'01A4
IETxI (TxRDY)
106
H'01A8

*4
IIC channel 0
(option)
*4
IIC channel 1
(option)
IEB*6
TETSI (transmit status)
107
H'01AC
SCI
ERI3 (receive error 3)
120
H'01E0
channel 3
RXI3 (receive completion 3)
121
H'01E4
TXI3 (transmit data empty 3)
122
H'01E8
TEI3 (transmit end )
123
H'01EC
IPRL2 to IPRL0
IPRL2 to IPRL0
IPRM6 to IPRM4
IPRO6 to IPRO4
Low
Notes: 1. Lower 16 bits of the start address.
2. IPR6 to IPR4, and IPR2 to IPR0 bits are reserved, because these bits have no
corresponding interruption. These bits are always read as 0 and cannot be modified.
3. Not available in the H8S/2227 Group.
4. Not available in the H8S/2237 Group and H8S/2227 Group.
5. Supported only by the H8S/2239 Group.
6. Supported only by the H8S/2258 Group.
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Section 5 Interrupt Controller
5.5
Operation
5.5.1
Interrupt Control Modes and Interrupt Operation
Interrupt operations in this LSI differ depending on the interrupt control mode.
NMI interrupts are accepted at all times except in the reset state and the hardware standby state. In
the case of IRQ interrupts and on-chip peripheral module interrupts, an enable bit is provided for
each interrupt. Clearing an enable bit to 0 disables the corresponding interrupt request. Interrupt
sources for which the enable bits are set to 1 are controlled by the interrupt controller.
Table 5.3 shows the interrupt control modes.
The interrupt controller performs interrupt control according to the interrupt control mode set by
the INTM1 and INTM0 bits in SYSCR, the priorities set in IPR, and the masking state indicated
by the I bit in the CPU’s CCR, and bits I2 to I0 in EXR.
Table 5.3
Interrupt Control Modes
SYSCR
Interrupt
Priority Setting
Control Mode INTM1 INTM0 Registers
0
2


I
Interrupt mask control is
performed by the I bit.
1


Setting prohibited
0
IPR
I2 to I0
8-level interrupt mask control
is performed by bits I2 to I0.
8 priority levels can be set with
IPR.


Setting prohibited
0
0
1
1

Interrupt
Mask Bits Description
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Section 5 Interrupt Controller
Figure 5.4 shows the block diagram of the priority decision circuits.
Interrupt
control
mode 0
I
Interrupt
acceptance
control
Default priority
determination
Interrupt source
Vector number
8-level
mask control
IPR
I2 to I0
Interrupt control mode 2
Figure 5.4 Block Diagram of Interrupt Control Operation
Interrupt Acceptance Control: In interrupt control mode 0, interrupt acceptance is controlled by
the I bit in CCR.
Table 5.4 shows the interrupts selected in each interrupt control mode.
Table 5.4
Interrupts Selected in Each Interrupt Control Mode (1)
Interrupt Mask Bits
Interrupt Control Mode
I
Selected Interrupts
0
0
All interrupts
1
NMI interrupts
×
All interrupts
2
Legend: ×: Don’t care
8-Level Control: In interrupt control mode 2, 8-level mask level determination is performed for
the selected interrupts in interrupt acceptance control according to the interrupt priority level
(IPR).
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Section 5 Interrupt Controller
The interrupt source selected is the interrupt with the highest priority level, and whose priority
level set in IPR is higher than the mask level.
Table 5.5
Interrupts Selected in Each Interrupt Control Mode (2)
Interrupt Control Mode
Selected Interrupts
0
All interrupts
2
Highest-priority-level (IPR) interrupt whose priority level is greater
than the mask level (IPR > I2 to I0).
Default Priority Determination: When an interrupt is selected by 8-level control, its priority is
determined and a vector number is generated.
If the same value is set for IPR, acceptance of multiple interrupts is enabled, and so only the
interrupt source with the highest priority according to the preset default priorities is selected and
has a vector number generated.
Interrupt sources with a lower priority than the accepted interrupt source are held pending.
Table 5.6 shows operations and control signal functions in each interrupt control mode.
Table 5.6
Interrupt
Control
Mode
0
2
Operations and Control Signal Functions in Each Interrupt Control Mode
Interrupt
Acceptance
Control
Setting
INTM1 INTM0
0
1
0
0
8-Level Control
I
O
IM
X

IPR
2
*
X
1
*
O
IM
PR
Legend:
O: Interrupt operation control performed.
X: No operation (All interrupts enabled).
IM: Used as interrupt mask bit.
PR: Sets priority.
: Not used.
Notes: 1. Set to 1 when interrupt is accepted.
2. Keep the initial setting.
Rev. 5.00 Aug 08, 2006 page 144 of 982
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I2 to I0
Default Priority
Determination
T
(Trace)
O

O
T
Section 5 Interrupt Controller
5.5.2
Interrupt Control Mode 0
Enabling and disabling of IRQ interrupts, IRQ interrupts and on-chip peripheral module interrupts
can be set by means of the I bit in the CPU’s CCR. Interrupts are enabled when the I bit is cleared
to 0, and disabled when set to 1.
Figure 5.5 shows a flowchart of the interrupt acceptance operation in this case.
1. If an interrupt source occurs when the corresponding interrupt enable bit is set to 1, an
interrupt request is sent to the interrupt controller.
2. If the I bit is set to 1, only an NMI interrupt is accepted, and other interrupt requests are held
pending. If the I bit is cleared, an interrupt request is accepted.
3. Interrupt requests are sent to the interrupt controller, the highest-ranked interrupt according to
the priority system is accepted, and other interrupt requests are held pending.
4. When the CPU accepts an interrupt request, it starts interrupt exception handling after
execution of the current instruction has been completed.
5. The PC and CCR are saved to the stack area by interrupt exception handling. The PC saved on
the stack shows the address of the first instruction to be executed after returning from the
interrupt handling routine.
6. Next, the I bit in CCR is set to 1. This masks all interrupts except NMI.
7. The CPU generates a vector address for the accepted interrupt and starts execution of the
interrupt handling routine at the address indicated by the contents of the vector address in the
vector table.
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Section 5 Interrupt Controller
Program execution status
Interrupt generated
No
Yes
Yes
NMI
No
No
Hold
pending
I=0
Yes
IRQ0
No
No
Yes
IRQ1
Yes
TEI3
Yes
Save PC and CCR
I←1
Read vector address
Branch to interrupt handling routine
Figure 5.5 Flowchart of Procedure Up to Interrupt Acceptance
in Interrupt Control Mode 0
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Section 5 Interrupt Controller
5.5.3
Interrupt Control Mode 2
Eight-level masking is implemented for IRQ interrupts, and on-chip peripheral module interrupts
by comparing the interrupt mask level set by bits I2 to I0 of EXR in the CPU with IPR.
Figure 5.6 shows a flowchart of the interrupt acceptance operation in this case.
1. If an interrupt source occurs when the corresponding interrupt enable bit is set to 1, an
interrupt request is sent to the interrupt controller.
2. When interrupt requests are sent to the interrupt controller, the interrupt with the highest
priority according to the interrupt priority levels set in IPR is selected, and lower-priority
interrupt requests are held pending. If a number of interrupt requests with the same priority are
generated at the same time, the interrupt request with the highest priority according to the
priority system shown in table 5.2 is selected.
3. Next, the priority of the selected interrupt request is compared with the interrupt mask level set
in EXR. An interrupt request with a priority no higher than the mask level set at that time is
held pending, and only an interrupt request with a priority higher than the interrupt mask level
is accepted.
4. When the CPU accepts an interrupt request, it starts interrupt exception handling after
execution of the current instruction has been completed.
5. The PC, CCR, and EXR are saved to the stack area by interrupt exception handling. The PC
saved on the stack shows the address of the first instruction to be executed after returning from
the interrupt handling routine.
6. The T bit in EXR is cleared to 0. The interrupt mask level is rewritten with the priority level of
the accepted interrupt.
If the accepted interrupt is NMI, the interrupt mask level is set to H'7.
7. The CPU generates a vector address for the accepted interrupt and starts execution of the
interrupt handling routine at the address indicated by the contents of the vector address in the
vector table.
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Section 5 Interrupt Controller
Program execution status
Interrupt generated?
No
Yes
Yes
NMI
No
Level 7 interrupt?
No
Yes
Mask level 6
or below?
Level 6 interrupt?
No
No
Yes
Level 1 interrupt?
Yes
Mask level 5
or below?
No
No
Yes
Yes
Mask level 0?
No
Yes
Save PC, CCR, and EXR
Hold
pending
Clear T bit to 0
Update mask level
Read vector address
Branch to interrupt handling routine
Figure 5.6 Flowchart of Procedure Up to Interrupt Acceptance in Control Mode 2
5.5.4
Interrupt Exception Handling Sequence
Figure 5.7 shows the interrupt exception handling sequence. The example shown is for the case
where interrupt control mode 0 is set in advanced mode, and the program area and stack area are
in on-chip memory.
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(1)
(2)
(4)
(3)
Internal
operation
Instruction prefetch address (Not executed.
This is the contents of the saved PC, the return address)
(2) (4) Instruction code (Not executed)
(3)
Instruction prefetch address (Not executed)
(5)
SP-2
(7)
SP-4
(1)
Internal
data bus
Internal
write signal
Internal
read signal
Internal
address bus
Interrupt
request signal
φ
Interrupt level determination Instruction
Wait for end of instruction
prefetch
Interrupt
acceptance
(7)
(8)
(10)
(9)
Vector fetch
(12)
(11)
(14)
(13)
Interrupt service
routine instruction
prefetch
Saved PC and saved CCR
Vector address
Interrupt handling routine start address (Vector address contents)
Interrupt handling routine start address ((13) = (10)(12))
First instruction of interrupt handling routine
(6)
(6) (8)
(9) (11)
(10) (12)
(13)
(14)
(5)
stack
Internal
operation
Section 5 Interrupt Controller
Figure 5.7 Interrupt Exception Handling
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Section 5 Interrupt Controller
5.5.5
Interrupt Response Times
This LSI is capable of fast word transfer to on-chip memory, has the program area in on-chip
ROM and the stack area in on-chip RAM, enabling high-speed processing.
Table 5.7 shows interrupt response times—the interval between generation of an interrupt request
and execution of the first instruction in the interrupt handling routine. The execution status
symbols used in table 5.7 are explained in table 5.8.
Table 5.7
Interrupt Response Times
5
Normal Mode*
Advanced Mode
No.
Execution Status
INTM1 = 0
INTM1 = 1
INTM1 = 0
INTM1 = 1
1
Interrupt priority
1
determination*
3
3
3
3
2
Number of wait states until
2
executing instruction ends*
1 to 19 + 2·SI
1 to 19 + 2·SI
1 to 19 + 2·SI 1 to 19 + 2·SI
3
PC, CCR, EXR stack save
2·SK
3·SK
2·SK
3·SK
4
Vector fetch
SI
SI
2·SI
2·SI
5
3
Instruction fetch*
2·SI
2·SI
2·SI
2·SI
6
4
Internal processing*
2
2
2
2
11 to 31
12 to 32
12 to 32
13 to 33
Total (using on-chip memory)
Notes: 1.
2.
3.
4.
5.
Two states in case of internal interrupt.
Refers to MULXS and DIVXS instructions.
Prefetch after interrupt acceptance and interrupt handling routine prefetch.
Internal processing after interrupt acceptance and internal processing after vector fetch.
Not available in this LSI.
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Section 5 Interrupt Controller
Table 5.8
Number of States in Interrupt Handling Routine Execution Status
Object of Access
External Device
8 Bit Bus
Symbol
Instruction fetch
SI
Branch address read
SJ
Stack manipulation
SK
16 Bit Bus
Internal
Memory
2-State
Access
3-State
Access
2-State
Access
3-State
Access
1
4
6+2m
2
3+m
Legend:
m: Number of wait states in an external device access.
5.5.6
DTC and DMAC* Activation by Interrupt
The DTC and DMAC* can be started by interrupts. The following settings are required for this
operation.
1. Interrupt request to the CPU
2. Start request to the DTC
3. Start request to the DMAC*
4. Multiple specification of items 1 to 3.
See section 8, DMA Controller (DMAC)*, and section 9, Data Transfer Controller (DTC) for
more information on the interrupts that can start the DTC and DMAC*.
Figure 5.8 shows the block diagram of the DTC, DMAC*, and interrupt controller circuits.
Note: * Supported only by the H8S/2239 Group.
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Section 5 Interrupt Controller
Stop signal
Clear signal
DMAC*
DTC start
request vector
number
Interrupt request
Selection
circuit
IRQ
interrupt
Interrupt source
Internal clear signal
peripheral
function
modules
Selection
signal Clear
signal
DTCER
Control logic
DTC
Clear signal
DTVECR
SWDTE
clear signal
Determination of
priority
CPU interrupt
request vector
number
CPU
I, I2 to I0
Interrupt controller
Note: * Supported only by the H8S/2239 Group.
Figure 5.8 DTC and DMAC* Interrupt Control
(1) Interrupt Source Selection
The DMAC* startup sources are directly input to each channel. The startup source for each
DMAC* channel is selected by the DMACR DTF3 to DTF0 bits. Whether or not the selected
startup source is managed by the DMAC* can be selected with the DMABCR DTA bit. If the
DTA bit is set to 1, the interrupt source that has become the DMAC* startup source will not be
either a DTC startup source or a CPU interrupt source.
Interrupt sources other than the interrupt managed by the DMAC* are selected to be DTC startup
sources or CPU interrupt requests by the DTC DTCERA to DTCERF DTCE bits.
After a DTC data transfer, a CPU interrupt can be requested by clearing the DTCE bit to 0 by
specifying that with the DTC MRB DISEL bit.
Note that when the DTC has performed the stipulated number of data transfers and the transfer
counter has become 0, the DTCE bit can be cleared to 0 and a CPU interrupt can be requested.
Note: * Supported only by the H8S/2239 Group.
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Section 5 Interrupt Controller
(2) Determination of priority
The DTC startup source is selected according to the default priority. This is not influenced by the
mask level or the priority level. See section 9.4, Location of Register Information and DTC Vector
Table, for details on these priorities.
The startup sources are directly input to each channel in the DMAC*.
Note: * Supported only by the H8S/2239 Group.
(3) Operating Sequence
When the same interrupt is selected as both the DTC startup source and a CPU interrupt source,
the DTC data transfer is performed and then the CPU interrupt exception handling is performed.
When the same interrupt is selected as both the DMAC* startup source and either the DTC startup
source or a CPU interrupt source, the operations are performed independently. They are performed
according to the operating states and the bus priorities.
Table 5.9 shows the interrupt source selection and the interrupt source clear control according to
the settings of the DMAC* DMABCR DTA bit, the DTC DTCERA to DTCERF DTCE bits, and
the DTC MRB DISEL bit.
Note: * Supported only by the H8S/2239 Group.
Table 5.9
Interrupt Source Selection and Clear Control
Settings
1
DMAC*
Interrupt source selection and clear control
DTC
DTA
DTCE
DISEL
0
0
*
1
0
DMAC*
1
DTC
CPU
×
×
1
1
*
*
×
×
Legend:
:
The corresponding interrupt is used. The interrupt source is cleared.
(The CPU must clear the source flag in the interrupt handler.)
:
The corresponding interrupt is used. The interrupt source is not cleared.
×:
The corresponding interrupt is not used.
*:
Don't care
Note: 1. Supported only by the H8S/2239 Group.
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Section 5 Interrupt Controller
(4) Usage Notes
The SCI and A/D converter interrupt sources are cleared when the DMAC* or DTC reads or
writes the stipulated register. This does not depend on the DTA, DTCE, and DISEL bits.
Note: * Supported only by the H8S/2239 Group.
5.6
Usage Notes
5.6.1
Contention between Interrupt Generation and Disabling
When an interrupt enable bit is cleared to 0 to disable interrupt requests, the disabling becomes
effective after execution of the instruction.
When an interrupt enable bit is cleared to 0 by an instruction such as BCLR or MOV, and if an
interrupt is generated during execution of the instruction, the interrupt concerned will still be
enabled on completion of the instruction, and so interrupt exception handling for that interrupt will
be executed on completion of the instruction. However, if there is an interrupt request of higher
priority than that interrupt, interrupt exception handling will be executed for the higher-priority
interrupt, and the lower-priority interrupt will be ignored.
The same also applies when an interrupt source flag is cleared to 0.
Figure 5.9 shows an example in which the CMIEA bit in the TCR register of the 8-bit timer is
cleared to 0.
The above contention will not occur if an enable bit or interrupt source flag is cleared to 0 while
the interrupt is masked.
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Section 5 Interrupt Controller
TCR write cycle by CPU
CMIA exception handling
φ
Internal
address bus
TCR address
Internal
write signal
CMIEA
CMFA
CMIA
interrupt signal
Figure 5.9 Contention between Interrupt Generation and Disabling
5.6.2
Instructions that Disable Interrupts
The instructions that disable interrupts are LDC, ANDC, ORC, and XORC. After any of these
instructions are executed, all interrupts including NMI are disabled and the next instruction is
always executed. When the I bit is set by one of these instructions, the new value becomes valid
two states after execution of the instruction ends.
5.6.3
When Interrupts are Disabled
There are times when interrupt acceptance is disabled by the interrupt controller.
The interrupt controller disables interrupt acceptance for a 3-state period after the CPU has
updated the mask level with an LDC, ANDC, ORC, or XORC instruction.
5.6.4
Interrupts during Execution of EEPMOV Instruction
Interrupt operation differs between the EEPMOV.B instruction and the EEPMOV.W instruction.
With the EEPMOV.B instruction, an interrupt request (including NMI) issued during the transfer
is not accepted until the move is completed.
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Section 5 Interrupt Controller
With the EEPMOV.W instruction, if an interrupt request is issued during the transfer, interrupt
exception handling starts at a break in the transfer cycle. The PC value saved on the stack in this
case is the address of the next instruction.
Therefore, if an interrupt is generated during execution of an EEPMOV.W instruction, the
following coding should be used.
L1: EEPMOV.W
MOV.W
R4,R4
BNE
L1
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Section 6 PC Break Controller (PBC)
Section 6 PC Break Controller (PBC)
The PC break controller (PBC) provides functions that simplify program debugging. Using these
functions, it is easy to create a self-monitoring debugger, enabling programs to be debugged with
the chip alone, without using an in-circuit emulator. A block diagram of the PC break controller is
shown in figure 6.1.
6.1
Features
• Two break channels (A and B)
• 24-bit break address
 Bit masking possible
• Four types of break compare conditions
 Instruction fetch
 Data read
 Data write
 Data read/write
• Bus master
 Either CPU or CPU/DTC can be selected
• The timing of PC break exception handling after the occurrence of a break condition is as
follows:
 Immediately before execution of the instruction fetched at the set address (instruction
fetch)
 Immediately after execution of the instruction that accesses data at the set address (data
access)
• Module stop mode can be set
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Section 6 PC Break Controller (PBC)
BCRA
Output control
BARA
Mask control
Control
logic
Comparator
Match signal
Internal address
PC break
interrupt
Access
status
Control
logic
Comparator
Output control
Match signal
Mask control
BARB
BCRB
Figure 6.1 Block Diagram of PC Break Controller
6.2
Register Descriptions
The PC break controller has the following registers.
• Break address register A (BARA)
• Break address register B (BARB)
• Break control register A (BCRA)
• Break control register B (BCRB)
6.2.1
Break Address Register A (BARA)
BARA is a 32-bit readable/writable register that specifies the channel A break address.
Bit
Bit Name
Initial Value
R/W
Description
31 to 24

Undefined

Reserved
These bits are read as an undefined value
and cannot be modified.
23 to 0
BAA23 to BAA0
All 0
R/W
Break Address 23 to 0
These bits set the channel A PC break
address.
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Section 6 PC Break Controller (PBC)
6.2.2
Break Address Register B (BARB)
BARB is the channel B break address register. The bit configuration is the same as for BARA.
6.2.3
Break Control Register A (BCRA)
BCRA controls channel A PC breaks.
Bit
7
Bit Name
CMFA
Initial Value
0
R/W
R/(W)
Description
*1
Condition Match Flag A
[Setting condition]
When a condition set for channel A is satisfied
[Clearing condition]
2
When 0 is written to CMFA after reading* CMFA
=1
6
CDA
0
R/W
CPU Cycle/DTC Cycle Select A
Selects the channel A break condition bus master.
0: CPU
1: CPU, DTC, or DMAC*
3
5
BAMRA2
0
R/W
Break Address Mask Register A2 to A0
4
BAMRA1
0
R/W
3
BAMRA0
0
R/W
These bits specify which bits of the break address
set in BARA are to be masked.
000: BAA23 to 0 (All bits are unmasked)
001: BAA23 to 1 (Lowest bit is masked)
010: BAA23 to 2 (Lower 2 bits are masked)
011: BAA23 to 3 (Lower 3 bits are masked)
100: BAA23 to 4 (Lower 4 bits are masked)
101: BAA23 to 8 (Lower 8 bits are masked)
110: BAA23 to 12 (Lower 12 bits are masked)
111: BAA23 to 16 (Lower 16 bits are masked)
2
CSELA1
0
R/W
Break Condition Select
1
CSELA0
0
R/W
Selects break condition of channel A.
00: Instruction fetch
01: Data read cycle
10: Data write cycle
11: Data read/write cycle
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Section 6 PC Break Controller (PBC)
Bit
Bit Name
Initial Value
R/W
0
BIEA
0
R/W
Description
Break Interrupt Enable
When this bit is 1, the PC break interrupt request
of channel A is enabled.
Notes: 1. Only a 0 can be written to this bit to clear the flag.
2. Read the state wherein CMFA = 1 twice or more, when the CMFA is polled after
inhibiting the PC break interruption.
3. Supported only by the H8S/2239 Group.
6.2.4
Break Control Register B (BCRB)
BCRB is the channel B break control register. The bit configuration is the same as for BCRA.
6.3
Operation
The operation flow from break condition setting to PC break interrupt exception handling is shown
in section 6.3.1, PC Break Interrupt Due to Instruction Fetch, and section 6.3.2, PC Break Interrupt
Due to Data Access, taking the example of channel A.
6.3.1
PC Break Interrupt Due to Instruction Fetch
1. Set the break address in BARA.
For a PC break caused by an instruction fetch, set the address of the first instruction byte as the
break address.
2. Set the break conditions in BCRA.
Set bit 6 (CDA) to 0 to select the CPU because the bus master must be the CPU for a PC break
caused by an instruction fetch. Set the address bits to be masked to bits 5 to 3 (BAMRA2 to 0).
Set bits 2 and 1 (CSELA1 and 0) to 00 to specify an instruction fetch as the break condition.
Set bit 0 (BIEA) to 1 to enable break interrupts.
3. When the instruction at the set address is fetched, a PC break request is generated immediately
before execution of the fetched instruction, and the condition match flag (CMFA) is set.
4. After priority determination by the interrupt controller, PC break interrupt exception handling
is started.
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Section 6 PC Break Controller (PBC)
6.3.2
PC Break Interrupt Due to Data Access
1. Set the break address in BARA.
For a PC break caused by a data access, set the target ROM, RAM, I/O, or external address
space address as the break address. Stack operations and branch address reads are included in
data accesses.
2. Set the break conditions in BCRA.
Select the bus master with bit 6 (CDA). Set the address bits to be masked to bits 5 to 3
(BAMRA2 to 0). Set bits 2 and 1 (CSELA1 and 0) to 01, 10, or 11 to specify data access as the
break condition. Set bit 0 (BIEA) to 1 to enable break interrupts.
3. After execution of the instruction that performs a data access on the set address, a PC break
request is generated and the condition match flag (CMFA) is set.
4. After priority determination by the interrupt controller, PC break interrupt exception handling
is started.
6.3.3
Notes on PC Break Interrupt Handling
• When a PC break interrupt is generated at the transfer address of an EEPMOV.B instruction
PC break exception handling is executed after all data transfers have been completed and the
EEPMOV.B instruction has ended.
• When a PC break interrupt is generated at a DTC transfer address
PC break exception handling is executed after the DTC has completed the specified number of
data transfers, or after data for which the DISEL bit is set to 1 has been transferred.
6.3.4
Operation in Transitions to Power-Down Modes
The operation when a PC break interrupt is set for an instruction fetch at the address after a
SLEEP instruction is shown below.
• When the SLEEP instruction causes a transition from high-speed (medium-speed) mode to
sleep mode, or from subactive mode to subsleep mode:
After execution of the SLEEP instruction, a transition is not made to sleep mode or subsleep
mode, and PC break interrupt handling is executed. After execution of PC break interrupt
handling, the instruction at the address after the SLEEP instruction is executed (figure 6.2 (A)).
• When the SLEEP instruction causes a transition from high speed (medium speed) mode to
subactive mode (figure 6.2 (B)).
• When the SLEEP instruction causes a transition from subactive mode to high speed (medium
speed) mode (figure 6.2 (C)).
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Section 6 PC Break Controller (PBC)
• When the SLEEP instruction causes a transition to software standby mode or watch mode:
After execution of the SLEEP instruction, a transition is made to the respective mode, and PC
break interrupt handling is not executed. However, the CMFA or CMFB flag is set (figure 6.2
(D).
SLEEP instruction
execution
SLEEP instruction
execution
SLEEP instruction
execution
SLEEP instruction
execution
PC break exception
handling
System clock
→ subclock
Subclock →
system clock,
oscillation settling time
Transition to
respective mode
(D)
Execution of instruction
after sleep instruction
Direct transition
exception handling
(A)
PC break exception
handling
Direct transition
exception handling
Subactive
mode
PC break exception
handling
Execution of instruction
after sleep instruction
Execution of instruction
after sleep instruction
(B)
(C)
High-speed
(medium-speed)
mode
Figure 6.2 Operation in Power-Down Mode Transitions
6.3.5
When Instruction Execution Is Delayed by One State
While the break interrupt enable bit is set to 1, instruction execution is one state later than usual.
• For 1-word branch instructions (Bcc d:8, BSR, JSR, JMP, TRAPA, RTE, and RTS) in on-chip
ROM or RAM.
• When break interruption by instruction fetch is set, the set address indicates on-chip ROM or
RAM space, and that address is used for data access, the instruction that executes the data
access is one state later than in normal operation.
• When break interruption by instruction fetch is set and a break interrupt is generated, if the
executing instruction immediately preceding the set instruction has one of the addressing
modes shown below, and that address indicates on-chip ROM or RAM, the instruction will be
one state later than in normal operation.
Addressing modes: @ERn, @(d:16,ERn), @(d:32,ERn), @-ERn/ERn+, @aa:8, @aa:24,
@aa:32, @(d:8,PC), @(d:16,PC), @@aa:8
• When break interruption by instruction fetch is set and a break interrupt is generated, if the
executing instruction immediately preceding the set instruction is NOP or SLEEP, or has #xx,
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Section 6 PC Break Controller (PBC)
Rn as its addressing mode, and that instruction is located in on-chip ROM or RAM, the
instruction will be one state later than in normal operation.
6.4
Usage Notes
6.4.1
Module Stop Mode Setting
PBC operation can be disabled or enabled using the module stop control register. The initial
setting is for PBC operation to be halted. Register access is enabled by clearing module stop mode.
For details, refer to section 24, Power-Down Modes.
6.4.2
PC Break Interrupts
The PC break interrupt is shared by channels A and B. The channel from which the request was
issued must be determined by the interrupt handler.
6.4.3
CMFA and CMFB
The CMFA and CMFB flags are not automatically cleared to 0, so 0 must be written to CMFA or
CMFB after first reading the flag while it is set to 1. If the flag is left set to 1, another interrupt
will be requested after interrupt handling ends.
6.4.4
PC Break Interrupt when DTC and DMAC* Is Bus Master
A PC break interrupt generated when the DTC and DMAC* is the bus master is accepted after the
bus has been transferred to the CPU by the bus controller.
Note: * Supported only by the H8S/2239 Group.
6.4.5
PC Break Set for Instruction Fetch at Address Following BSR, JSR, JMP, TRAPA,
RTE, and RTS Instruction
Even if the instruction at the address following a BSR, JSR, JMP, TRAPA, RTE, or RTS
instruction is fetched, it is not executed, and so a PC break interrupt is not generated by the
instruction fetch at the next address.
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Section 6 PC Break Controller (PBC)
6.4.6
I Bit Set by LDC, ANDC, ORC, and XORC Instruction
When the I bit is set by an LDC, ANDC, ORC, and XORC instruction, a PC break interrupt
becomes valid two states after the end of the executing instruction. If a PC break interrupt is set
for the instruction following one of these instructions, since interrupts, including NMI, are
disabled for a 3-state period in the case of LDC, ANDC, ORC, and XOR, the next instruction is
always executed. For details, see section 5, Interrupt Controller.
6.4.7
PC Break Set for Instruction Fetch at Address Following Bcc Instruction
When a PC break is set for an instruction fetch at an address following a Bcc instruction:
A PC break interrupt is generated if the instruction at the next address is executed in accordance
with the branch condition, and is not generated if the instruction at the next address is not
executed.
6.4.8
PC Break Set for Instruction Fetch at Branch Destination Address of Bcc
Instruction
A PC break interrupt is generated if the instruction at the branch destination is executed in
accordance with the branch condition, and is not generated if the instruction at the branch
destination is not executed.
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Section 7 Bus Controller
Section 7 Bus Controller
This LSI has a built-in bus controller (BSC) that manages the external address space divided into
eight areas. The bus controller also has a bus arbitration function, and controls the operation of the
internal bus masters: the CPU, DMA controller (DMAC)*, and data transfer controller (DTC).
Note: * Supported only by the H8S/2239 Group.
7.1
Features
• Manages external address space in area units
 Manages the external space as 8 areas of 2-Mbytes
 Bus specifications can be set independently for each area
 Burst ROM interface can be set
• Basic bus interface
 Chip select (CS7 to CS0) can be output for areas 7 to 0
 8-bit access or 16-bit access can be selected for each area
 2-state access or 3-state access can be selected for each area
 Program wait states can be inserted for each area
• Burst ROM interface
 Burst ROM interface can be selected for area 0
 One or two states can be selected for the burst cycle
• Idle cycle insertion
 Idle cycle can be inserted between consecutive read accesses to different areas
 Idle cycle can be inserted before a write access to an external area immediately after a read
access to an external area
• Bus arbitration
 The on-chip bus arbiter arbitrates bus mastership among CPU, DMAC*, and DTC.
• Other features
 External bus release function
Note: * Supported only by the H8S/2239 Group.
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Section 7 Bus Controller
Figure 7.1 shows a block diagram of the bus controller.
Chip select signals
Internal
address bus
Area decorder
ABWCR
External bus control signals
ASTCR
BCRH
BCRL
Bus
controller
Wait
controller
WAIT
Internal data bus
BREQ
BACK
Internal control
signals
Bus mode signal
WCRH
WCRL
CPU bus request signal
Bus arbiter
DTC bus request signal
DMAC bus request signal*
CPU bus acknowledge signal
DTC bus acknowledge signal
DMAC bus acknowledge signal*
Legend:
ABWCR: Bus width control register
ASTCR: Access state control register
WCRH: Wait control register H
WCRL: Wait control register L
BCRH: Bus control register H
BCRL: Bus control register L
Note: * Supported only by the H8S/2239 Group.
Figure 7.1 Block Diagram of Bus Controller
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Section 7 Bus Controller
7.2
Input/Output Pins
Table 7.1 summarizes the pins of the bus controller.
Table 7.1
Pin Configuration
Name
Symbol
I/O
Address strove
AS
Output Strobe signal indicating that address output on
address bus is enabled.
Read
RD
Output Strobe signal indicating that external space is being
read.
High write
HWR
Output Strobe signal indicating that external space is to be
written, and upper half (D15 to D8) of data bus is
enabled.
Low write
LWR
Output Strobe signal indicating that external space is to be
written, and lower half (D7 to D0) of data bus is
enabled.
Chip select 7 to 0 CS7 to CS0
Function
Output Strobe signal indicating that areas 7 to 0 are selected.
Wait
WAIT
Input
Wait request signal when accessing external 3-state
access space.
Bus request
BREQ
Input
Request signal that releases bus to external device.
Bus request
acknowledge
BACK
Output Acknowledge signal indicating that bus has been
released.
7.3
Register Descriptions
The following shows the registers of the bus controller.
• Bus width control register (ABWCR)
• Access state control register (ASTCR)
• Wait control register H (WCRH)
• Wait control register L (WCRL)
• Bus control register H (BCRH)
• Bus control register L (BCRL )
• Pin function control register (PFCR)
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Section 7 Bus Controller
7.3.1
Bus Width Control Register (ABWCR)
ABWCR designates each area for either 8-bit access or 16-bit access.
ABWCR sets the data bus width for the external memory space. The bus width for on-chip
memory and internal I/O registers is fixed regardless of the settings in ABWCR.
Bit
Bit Name
Initial Value R/W
Description
7
ABW7
1/0*
R/W
Area 7 to 0 Bus Width Control
6
ABW6
1/0*
R/W
5
ABW5
1/0*
R/W
These bits select whether the corresponding area is to
be designated for 8-bit access or 16-bit access.
4
ABW4
1/0*
R/W
0: Area n is designated for 16-bit access
3
ABW3
1/0*
R/W
1: Area n is designated for 8-bit access
2
ABW2
1/0*
R/W
Note: n = 7 to 0
1
ABW1
1/0*
R/W
0
ABW0
1/0*
R/W
Note:
7.3.2
*
In modes 5 to 7, initial value of each bit is 1. In mode 4, initial value of each bit is 0.
Access State Control Register (ASTCR)
ASTCR designates each area as either a 2-state access space or a 3-state access space.
ASTCR sets the number of access states for the external memory space. The number of access
states for on-chip memory and internal I/O registers is fixed regardless of the settings in ASTCR.
Bit
Bit Name
Initial Value R/W
Description
7
AST7
1
R/W
Area 7 to 0 Access State Control
6
AST6
1
R/W
5
AST5
1
R/W
4
AST4
1
R/W
These bits select whether the corresponding area is to
be designated as a 2-state access space or a 3-state
access space. Wait state insertion is enabled or disabled
at the same time.
3
AST3
1
R/W
0: Area n is designated for 2-state access
2
AST2
1
R/W
1
AST1
1
R/W
0
AST0
1
R/W
Wait state insertion in area n external space is
disabled
1: Area n is designated for 3-state access
Wait state insertion in area n external space is
enabled
Note: n = 7 to 0
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Section 7 Bus Controller
7.3.3
Wait Control Registers H and L (WCRH, WCRL)
WCRH and WCRL select the number of program wait states for each area.
Program waits are not inserted in the case of on-chip memory or internal I/O registers.
• WCRH
Bit
Bit Name
Initial Value R/W
Description
7
W71
1
R/W
Area 7 Wait Control 1 and 0
6
W70
1
R/W
These bits select the number of program wait states
when area 7 in external space is accessed while the
AST7 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
7 is accessed
01: 1 program wait state inserted when external space
area 7 is accessed
10: 2 program wait states inserted when external space
area 7 is accessed
11: 3 program wait states inserted when external space
area 7 is accessed
5
W61
1
R/W
Area 6 Wait Control 1 and 0
4
W60
1
R/W
These bits select the number of program wait states
when area 6 in external space is accessed while the
AST6 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
6 is accessed
01: 1 program wait state inserted when external space
area 6 is accessed
10: 2 program wait states inserted when external space
area 6 is accessed
11: 3 program wait states inserted when external space
area 6 is accessed
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Section 7 Bus Controller
Bit
Bit Name
Initial Value R/W
Description
3
W51
1
R/W
Area 5 Wait Control 1 and 0
2
W50
1
R/W
These bits select the number of program wait states
when area 5 in external space is accessed while the
AST5 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
5 is accessed
01: 1 program wait state inserted when external space
area 5 is accessed
10: 2 program wait states inserted when external space
area 5 is accessed
11: 3 program wait states inserted when external space
area 5 is accessed
1
W41
1
R/W
Area 4 Wait Control 1 and 0
0
W40
1
R/W
These bits select the number of program wait states
when area 4 in external space is accessed while the
AST4 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
4 is accessed
01: 1 program wait state inserted when external space
area 4 is accessed
10: 2 program wait states inserted when external space
area 4 is accessed
11: 3 program wait states inserted when external space
area 4 is accessed
• WCRL
Bit
Bit Name
Initial Value R/W
Description
7
W31
1
R/W
Area 3 Wait Control 1 and 0
6
W30
1
R/W
These bits select the number of program wait states
when area 3 in external space is accessed while the
AST3 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
3 is accessed
01: 1 program wait state inserted when external space
area 3 is accessed
10: 2 program wait states inserted when external space
area 3 is accessed
11: 3 program wait states inserted when external space
area 3 is accessed
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Section 7 Bus Controller
Bit
Bit Name
Initial Value R/W
Description
5
W21
1
R/W
Area 2 Wait Control 1 and 0
4
W20
1
R/W
These bits select the number of program wait states
when area 2 in external space is accessed while the
AST2 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
2 is accessed
01: 1 program wait state inserted when external space
area 2 is accessed
10: 2 program wait states inserted when external space
area 2 is accessed
11: 3 program wait states inserted when external space
area 2 is accessed
3
W11
1
R/W
Area 1 Wait Control 1 and 0
2
W10
1
R/W
These bits select the number of program wait states
when area 1 in external space is accessed while the
AST1 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
1 is accessed
01: 1 program wait state inserted when external space
area 1 is accessed
10: 2 program wait states inserted when external space
area 1 is accessed
11: 3 program wait states inserted when external space
area 1 is accessed
1
W01
1
R/W
Area 0 Wait Control 1 and 0
0
W00
1
R/W
These bits select the number of program wait states
when area 0 in external space is accessed while the
AST0 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
0 is accessed
01: 1 program wait state inserted when external space
area 0 is accessed
10: 2 program wait states inserted when external space
area 0 is accessed
11: 3 program wait states inserted when external space
area 0 is accessed
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Section 7 Bus Controller
7.3.4
Bus Control Register H (BCRH)
BCRH selects enabling or disabling of idle cycle insertion, and the memory interface for area 0.
Bit
Bit Name
Initial Value R/W
Description
7
ICIS1
1
Idle Cycle Insert 1
R/W
Selects whether or not one idle cycle state is to be
inserted between bus cycles when successive external
read cycles are performed in different areas.
0: Idle cycle not inserted in case of successive external
read cycles in different areas
1: Idle cycle inserted in case of successive external read
cycles in different areas
6
ICIS0
1
R/W
Idle Cycle Insert 0
Selects whether or not one idle cycle state is to be
inserted between bus cycles when successive external
read and write cycles are performed.
0: Idle cycle not inserted in case of successive external
read and write cycles
1: Idle cycle inserted in case of successive external read
and write cycles
5
BRSTRM
0
R/W
Burst ROM enable
Selects whether area 0 is used as a burst ROM
interface.
0: Area 0 is basic bus interface
1: Area 0 is burst ROM interface
4
BRSTS1
1
R/W
Burst Cycle Select 1
Selects the number of burst cycles for the burst ROM
interface.
0: Burst cycle comprises 1 state
1: Burst cycle comprises 2 states
3
BRSTS0
0
R/W
Burst Cycle Select 0
Selects the number of words that can be accessed in a
burst ROM interface burst access.
0: Max. 4 words in burst access
1: Max. 8 words in burst access
2 to —
0
All 0
R/W
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Reserved
The write value should always be 0.
Section 7 Bus Controller
7.3.5
Bus Control Register L (BCRL)
BCRL performs selection of the external bus-released state protocol, and enabling or disabling of
WAIT pin input.
Bit
Bit Name
Initial Value R/W
Description
7
BRLE
0
Bus release enable
R/W
Enables or disables external bus release.
0: External bus release is disabled. BREQ and BACK
can be used as I/O ports
1: External bus release is enabled
6
—
0
R/W
Reserved
The write value should always be 0.
5
—
0
—
Reserved
4
—
0
R/W
Reserved
This bit is always read as 0 and cannot be modified.
The write value should always be 0.
3
—
1
R/W
Reserved
The write value should always be 1.
2, 1 —
All 0
R/W
Reserved
The write value should always be 0.
0
WAITE
0
R/W
WAIT pin enable
Selects enabling or disabling of wait input by the WAIT
pin.
0: Wait input by WAIT pin disabled. WAIT pin can be
used as I/O port
1: Wait input by WAIT pin enabled
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Section 7 Bus Controller
7.3.6
Bit
Pin Function Control Register (PFCR)
Bit Name
7, 6 
Initial Value R/W
All 0
R/W
Description
Reserved
The write value should always be 0.
5
BUZZE
0
R/W
BUZZ Output Enable:
This bit selects enabling or disabling of BUZZ output
from pin PF1. WDT_1 input clock that is selected by
PSS, and CKS2 to CKS0 bits is output as BUZZ signal.
0: PF1 input/output pin
1: BUZZ output pin
4

0
R/W
Reserved
The write value should always be 0.
3
AE3
1/0*
R/W
Address Output Enable 3 to 0
2
AE2
1/0*
R/W
1
AE1
0
R/W
0
AE0
1/0*
R/W
These bits select enabling or disabling of address
outputs A23 to A8 in ROMless extended mode and
modes with ROM.
When a pin is enabled for address output, the address is
output regardless of the corresponding DDR setting.
When a pin is disabled for address output, it becomes an
output port when the corresponding DDR bit is set to 1.
0000: A23 to A8 output disabled
0001: A8 output enabled; A23 to A9 output disabled
0010: A9, A8 output enabled; A23 to A10 output disabled
0011: A10 to A8 output enabled; A23 to A11 output disabled
0100: A11 to A8 output enabled; A23 to A12 output disabled
0101: A12 to A8 output enabled; A23 to A13 output disabled
0110: A13 to A8 output enabled; A23 to A14 output disabled
0111: A14 to A8 output enabled; A23 to A15 output disabled
1000: A15 to A8 output enabled; A23 to A16 output disabled
1001: A16 to A8 output enabled; A23 to A17 output disabled
1010: A17 to A8 output enabled; A23 to A18 output disabled
1011: A18 to A8 output enabled; A23 to A19 output disabled
1100: A19 to A8 output enabled; A23 to A20 output disabled
1101: A20 to A8 output enabled; A23 to A21 output disabled
1110: A21 to A8 output enabled; A23, A22 output disabled
1111: A23 to A8 output enabled
Note:
*
In modes 4 and 5, initial value of each bit is 1. In modes 6 and 7, initial value of each bit
is 0.
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Section 7 Bus Controller
7.4
Bus Control
7.4.1
Area Divisions
In advanced mode, the bus controller partitions the 16 Mbytes address space into eight areas, 7 to
0, in 2-Mbyte units, and performs bus control for external space in area units. In normal mode*, it
controls a 64-kbyte address space comprising part of area 0.
Figure 7.2 shows an outline of the memory map.
Chip select signals (CS7 to CS0) can be output for each area.
Note: * Not availoable in this LSI.
H'000000
H'0000
Area 0
(2 Mbytes)
H'1FFFFF
H'200000
Area 1
(2 Mbytes)
H'3FFFFF
H'400000
Area 2
(2 Mbytes)
H'FFFF
H'5FFFFF
H'600000
Area 3
(2 Mbytes)
H'7FFFFF
H'800000
Area 4
(2 Mbytes)
H'9FFFFF
H'A00000
Area 5
(2 Mbytes)
H'BFFFFF
H'C00000
Area 6
(2 Mbytes)
H'DFFFFF
H'E00000
Area 7
(2 Mbytes)
H'FFFFFF
(1) Advanced mode
(2) Normal mode*
Note: * Not available in this LSI.
Figure 7.2 Overview of Area Divisions
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Section 7 Bus Controller
7.4.2
Bus Specifications
The external space bus specifications consist of three elements: bus width, number of access
states, and number of program wait states.
The bus width and number of access states for on-chip memory and internal I/O registers are
fixed, and are not affected by the bus controller.
(1) Bus Width: A bus width of 8 or 16 bits can be selected with ABWCR. An area for which an
8-bit bus is selected functions as an 8-bit access space, and an area for which a 16-bit bus is
selected functions as a16-bit access space.
If all areas are designated for 8-bit access, 8-bit bus mode is set; if any area is designated for
16-bit access, 16-bit bus mode is set. When the burst ROM interface is designated, 16-bit bus
mode is always set.
(2) Number of Access States: Two or three access states can be selected with ASTCR.
An area for which 2-state access is selected functions as a 2-state access space, and an area for
which 3-state access is selected functions as a 3-state access space.
With the burst ROM interface, the number of access states may be determined without regard
to ASTCR.
When 2-state access space is designated, wait insertion is disabled.
(3) Number of Program Wait States: When 3-state access space is designated by ASTCR, the
number of program wait states to be inserted automatically is selected with WCRH and
WCRL.
From 0 to 3 program wait states can be selected.
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Section 7 Bus Controller
Table 7.2
Bus Specifications for Each Area (Basic Bus Interface)
ABWCR
ASTCR
WCRH, WCRL
ABWn
ASTn
Wn1
Wn0
Bus Width Number of Access Number of Program
States
Wait States
0
0


16
1
0
0
1
1
1
0
2
1
3
1
0


1
0
0
1
7.4.3
Bus Specifications (Basic Bus Interface)
8
2
0
3
0
2
0
3
0
1
1
0
2
1
3
Bus Interface for Each Area
The initial state of each area is basic bus interface, 3-state access space. The initial bus width is
selected according to the operating mode. The bus specifications described here cover basic items
only, and the sections on each memory interface (7.6, Basic Bus Interface and 7.7, Burst ROM
Interface) should be referred to for further details.
(1) Area 0: Area 0 includes on-chip ROM, and in ROM-disabled extended mode, all of area 0 is
external space. In ROM-enabled extended mode, the space excluding on-chip ROM is external
space.
When area 0 external space is accessed, the CS0 signal can be output.
Either basic bus interface or burst ROM interface can be selected for area 0.
(2) Areas 6 to 1: In external extended mode, all of areas 6 to 1 is external space. When area 6 to 1
external space is accessed, the CS6 to CS1 pin signals respectively can be output. Only the
basic bus interface can be used for areas 6 to 1.
(3) Area 7: Area 7 includes the on-chip RAM and internal l/O registers. In external extended
mode, the space excluding the on-chip RAM and internal l/O registers, is external space. The
on-chip RAM is enabled when the RAME bit in the system control register (SYSCR) is set to
1; when the RAME bit is cleared to 0, the on-chip RAM is disabled and the corresponding
space becomes external space.
When area 7 external space is accessed, the CS7 signal can be output.
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Section 7 Bus Controller
Only the basic bus interface can be used for the area 7.
7.4.4
Chip Select Signals
This LSI can output chip select signals (CS7 to CS0) to areas 7 to 0, the signal being driven low
when the corresponding external space area is accessed. Figure 7.3 shows an example of CSn (n =
7 to 0) output timing. Enabling or disabling of the CSn signal is performed by setting the data
direction register (DDR) for the port corresponding to the particular CSn pin.
In ROM-disabled extended mode, the CS0 pin is placed in the output state after a power-on reset.
Pins CS7 to CS1 are placed in the input state after a power-on reset, and so the corresponding
DDR should be set to 1 when outputting signals CS7 to CS1.
In ROM-enabled extended mode, pins CS7 to CS0 are all placed in the input state after a power-on
reset, and so the corresponding DDR should be set to 1 when outputting signals CS7 to CS0. For
details, see section 10, I/O Ports.
Bus cycle
T1
T2
T3
φ
Address bus
Area n external address
CSn
Figure 7.3 CSn Signal Output Timing (n = 0 to 7)
7.5
Basic Timing
The CPU is driven by a system clock (φ), denoted by the symbol φ. The period from one rising
edge of φ to the next is referred to as a “state”. The memory cycle or bus cycle consists of one,
two, or three states. Different methods are used to access on-chip memory, on-chip peripheral
modules, and the external address space.
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Section 7 Bus Controller
7.5.1
On-Chip Memory (ROM, RAM) Access Timing
On-chip memory is accessed in one state. The data bus is 16 bits wide, permitting both byte and
word transfer instruction. Figure 7.4 shows the on-chip memory access cycle. Figure 7.5 shows the
pin states.
Bus cycle
T1
φ
Internal address bus
Address
Internal read signal
Read
access
Internal data bus
Read data
Internal write signal
Write
access
Internal data bus
Write data
Figure 7.4 On-5Chip Memory Access Cycle
Bus cycle
T1
φ
Address bus
Unchanged
AS
High
RD
High
HWR, LWR
High
Data bus
High-impedance state
Figure 7.5 Pin States during On-Chip Memory Access
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Section 7 Bus Controller
7.5.2
On-Chip Peripheral Module Access Timing
The on-chip peripheral modules are accessed in two states. The data bus is either 8 bits or 16 bits
wide, depending on the particular internal I/O register being accessed. Figure 7.6 shows the access
timing for the on-chip peripheral modules. Figure 7.7 shows the pin states.
Bus cycle
T1
T2
φ
Internal address bus
Address
Internal read signal
Read
access
Internal data bus
Read data
Internal write signal
Write
access
Internal data bus
Write data
Figure 7.6 On-Chip Peripheral Module Access Cycle
Bus cycle
T1
T2
φ
Address bus
Unchanged
AS
High
RD
High
HWR, LWR
High
Data bus
High-impedance state
Figure 7.7 Pin States during On-Chip Peripheral Module Access
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Section 7 Bus Controller
7.5.3
External Address Space Access Timing
The external address space is accessed with an 8-bit or 16-bit data bus width in a two-state or
three-state bus cycle. In three-state access, wait states can be inserted. For further details, refer to
section 7.6.3, Basic Timing.
7.6
Basic Bus Interface
The basic bus interface enables direct connection of ROM, SRAM, and so on.
7.6.1
Data Size and Data Alignment
Data sizes for the CPU and other internal bus masters are byte, word, and longword. The bus
controller has a data alignment function, and when accessing external space, controls whether the
upper data bus (D15 to D8) or lower data bus (D7 to D0) is used according to the bus
specifications for the area being accessed (8-bit access space or 16-bit access space) and the data
size.
8-Bit Access Space: Figure 7.8 illustrates data alignment control for the 8-bit access space. With
the 8-bit access space, the upper data bus (D15 to D8) is always used for accesses. The amount of
data that can be accessed at one time is one byte: a word transfer instruction is performed as twobyte accesses, and a longword transfer instruction, as four-byte accesses.
Upper data bus
D15
Byte size
• Even address
Byte size
• Odd address
Word size
Lower data bus
D8 D7
D0
1st bus cycle
2nd bus cycle
Longword
size
1st bus cycle
2nd bus cycle
3rd bus cycle
4th bus cycle
Figure 7.8 Access Sizes and Data Alignment Control (8-Bit Access Space)
16-Bit Access Space: Figure 7.9 illustrates data alignment control for the 16-bit access space.
With the 16-bit access space, the upper data bus (D15 to D8) and lower data bus (D7 to D0) are
used for accesses. The amount of data that can be accessed at one time is one byte or one word,
and a longword transfer instruction is executed as two word transfer instructions.
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Section 7 Bus Controller
In byte access, whether the upper or lower data bus is used is determined by whether the address is
even or odd. The upper data bus is used for an even address, and the lower data bus for an odd
address.
Upper data bus
Lower data bus
D15
D8 D7
D0
Byte size
• Even address
Byte size
• Odd address
Word size
1st bus cycle
Longword
size
2nd bus cycle
Figure 7.9 Access Sizes and Data Alignment Control (16-Bit Access Space)
7.6.2
Valid Strobes
Table 7.3 shows the data buses used and valid strobes for the access spaces.
In a read, the RD signal is valid without discrimination between the upper and lower halves of the
data bus.
In a write, the HWR signal is valid for the upper half of the data bus, and the LWR signal for the
lower half.
Table 7.3
Area
Data Buses Used and Valid Strobes
Access
Size
8-bit access Byte
space
16-bit
access
space
Byte
Read/
Write
Address
Valid Strobe
Upper Data Bus Lower Data Bus
(D15 to D8)
(D7 to D0)
Read
—
RD
Valid
Write
—
HWR
Read
Even
RD
Odd
Hi-Z
Valid
Invalid
Invalid
Valid
Even
HWR
Valid
Hi-Z
Odd
LWR
Hi-Z
Valid
Read
—
RD
Valid
Valid
Write
—
HWR, LWR
Valid
Valid
Write
Word
Invalid
Notes: Hi-Z:
High impedance.
Invalid: Input state; input value is ignored.
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Section 7 Bus Controller
7.6.3
Basic Timing
8-Bit 2-State Access Space: Figure 7.10 shows the bus timing for an 8-bit 2-state access space.
When an 8-bit access space is accessed, the upper half (D15 to D8) of the data bus is used.
Wait states cannot be inserted.
Bus cycle
T2
T1
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Valid
D7 to D0
Invalid
HWR
LWR
(16-bit bus
mode)
Write
LWR
(8-bit bus
mode)
D15 to D8
D7 to D0
High
High impedance
Valid
High impedance
Note: n = 7 to 0
Figure 7.10 Bus Timing for 8-Bit 2-State Access Space
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Section 7 Bus Controller
8-Bit 3-State Access Space: Figure 7.11 shows the bus timing for an 8-bit 3-state access space.
When an 8-bit access space is accessed, the upper half (D15 to D8) of the data bus is used.
Wait states can be inserted.
Bus cycle
T1
T2
T3
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Valid
D7 to D0
Invalid
HWR
LWR
(16-bit bus
mode)
Write
LWR
(8-bit bus
mode)
D15 to D8
D7 to D0
High
High impedance
Valid
High impedance
Note: n = 7 to 0
Figure 7.11 Bus Timing for 8-Bit 3-State Access Space
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Section 7 Bus Controller
16-Bit 2-State Access Space: Figures 7.12 to 7.14 show bus timings for a 16-bit 2-state access
space. When a 16-bit access space is accessed, the upper half (D15 to D8) of the data bus is used
for the even address, and the lower half (D7 to D0) for the odd address.
Wait states cannot be inserted.
Bus cycle
T1
T2
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Valid
D7 to D0
Invalid
HWR
LWR
High
Write
D15 to D8
D7 to D0
Valid
High impedance
Note: n = 7 to 0
Figure 7.12 Bus Timing for 16-Bit 2-State Access Space (1) (Even Address Byte Access)
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Section 7 Bus Controller
Bus cycle
T1
T2
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Invalid
D7 to D0
Valid
HWR
High
LWR
Write
High impedance
D15 to D8
D7 to D0
Valid
Note: n = 7 to 0
Figure 7.13 Bus Timing for 16-Bit 2-State Access Space (2) (Odd Address Byte Access)
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Section 7 Bus Controller
Bus cycle
T1
T2
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Valid
D7 to D0
Valid
HWR
LWR
Write
D15 to D8
Valid
D7 to D0
Valid
Note: n = 7 to 0
Figure 7.14 Bus Timing for 16-Bit 2-State Access Space (3) (Word Access)
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Section 7 Bus Controller
16-Bit 3-State Access Space: Figures 7.15 to 7.17 show bus timings for a 16-bit 3-state access
space. When a 16-bit access space is accessed , the upper half (D15 to D8) of the data bus is used
for the even address, and the lower half (D7 to D0) for the odd address.
Wait states can be inserted.
Bus cycle
T1
T2
T3
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Valid
D7 to D0
Invalid
HWR
LWR
High
Write
D15 to D8
D7 to D0
Valid
High impedance
Note: n = 7 to 0
Figure 7.15 Bus Timing for 16-Bit 3-State Access Space (1) (Even Address Byte Access)
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Section 7 Bus Controller
Bus cycle
T1
T2
T3
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Invalid
D7 to D0
Valid
HWR
High
LWR
Write
D15 to D8
D7 to D0
High impedance
Valid
Note: n = 7 to 0
Figure 7.16 Bus Timing for 16-Bit 3-State Access Space (2) (Odd Address Byte Access)
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Section 7 Bus Controller
Bus cycle
T1
T2
T3
φ
Address bus
CSn
AS
RD
Read
D15 to D8
Valid
D7 to D0
Valid
HWR
LWR
Write
D15 to D8
Valid
D7 to D0
Valid
Note: n = 7 to 0
Figure 7.17 Bus Timing for 16-Bit 3-State Access Space (3) (Word Access)
7.6.4
Wait Control
When accessing external space, this LSI can extend the bus cycle by inserting one or more wait
states (Tw). There are two ways of inserting wait states: program wait insertion and pin wait
insertion using the WAIT pin.
(1) Program Wait Insertion
From 0 to 3 wait states can be inserted automatically between the T2 state and T3 state on an
individual area basis in 3-state access space, according to the settings of WCRH and WCRL.
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Section 7 Bus Controller
(2) Pin Wait Insertion
Setting the WAITE bit in BCRH to 1 enables wait insertion by means of the WAIT pin. When
external space is accessed in this state, program wait insertion is first carried out according to
the settings in WCRH and WCRL. Then, if the WAIT pin is low at the falling edge of φ in the
last T2 or TW state, a TW state is inserted. If the WAIT pin is held low, TW states are inserted
until it goes high.
Figure 7.18 shows an example of wait state insertion timing.
By program
wait
T1
T2
Tw
By WAIT pin
Tw
Tw
T3
φ
WAIT
Address bus
AS
RD
Read
Data bus
Read data
HWR, LWR
Write
Data bus
Write data
Note: ↓ indicates the timing of WAIT pin sampling.
Figure 7.18 Example of Wait State Insertion Timing
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Section 7 Bus Controller
7.7
Burst ROM Interface
With this LSI, external space area 0 can be designated as burst ROM space, and burst ROM
interfacing can be performed. The burst ROM space interface enables 16-bit configuration ROM
with burst access capability to be accessed at high speed.
Area 0 can be designated as burst ROM space by means of the BRSTRM bit in BCRH.
Consecutive burst accesses of a maximum of 4 words or 8 words can be performed for CPU
instruction fetches only. One or two states can be selected for burst access.
Note: When the operating frequency ranges from 16 MHz to 20 MHz, the burst ROM interface
is not available.
7.7.1
Basic Timing
The number of states in the initial cycle (full access) of the burst ROM interface is in accordance
with the setting of the AST0 bit in ASTCR. Also, when the AST0 bit is set to 1, wait state
insertion is possible. One or two states can be selected for the burst cycle, according to the setting
of the BRSTS1 bit in BCRH. Wait states cannot be inserted. When area 0 is designated as burst
ROM space, it becomes 16-bit access space regardless of the setting of the ABW0 bit in ABWCR.
When the BRSTS0 bit in BCRH is cleared to 0, burst access of up to 4 words is performed; when
the BRSTS0 bit is set to 1, burst access of up to 8 words is performed.
The basic access timing for burst ROM space is shown in figures 7.19 and 7.20. The timing shown
in figure 7.19 is for the case where the AST0 and BRSTS1 bits are both set to 1, and that in figure
7.20 is for the case where both these bits are cleared to 0.
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Section 7 Bus Controller
Full access
T1
T2
Burst access
T3
T1
T2
T1
T2
φ
Only lower address changed
Address bus
CS0
AS
RD
Data bus
Read data
Read data
Read data
Figure 7.19 Example of Burst ROM Access Timing (When AST0 = BRSTS1 = 1)
Full access
T1
T2
Burst access
T1
T1
φ
Address bus
Only lower address changed
CS0
AS
RD
Data bus
Read data
Read data Read data
Figure 7.20 Example of Burst ROM Access Timing (When AST0 = BRSTS1 = 0)
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Section 7 Bus Controller
7.7.2
Wait Control
As with the basic bus interface, either program wait insertion or pin wait insertion using the WAIT
pin can be used in the initial cycle (full access) of the burst ROM interface. See section 7.6.4, Wait
Control.
Wait states cannot be inserted in a burst cycle.
7.8
Idle Cycle
When this LSI accesses external space, it can insert a 1-state idle cycle (TI) between bus cycles in
the following two cases: (1) when read accesses between different areas occur consecutively, and
(2) when a write cycle occurs immediately after a read cycle. By inserting an idle cycle it is
possible, for example, to avoid data collisions between ROM, with a long output floating time, and
high-speed memory, I/O interfaces, and so on.
(1) Consecutive Reads between Different Areas
If consecutive reads between different areas occur while the ICIS1 bit in BCRH is set to 1, an
idle cycle is inserted at the start of the second read cycle.
Figure 7.21 shows an example of the operation in this case. In this example, bus cycle A is a
read cycle from ROM with a long output floating time, and bus cycle B is a read cycle from
SRAM, each being located in a different area. In (a), an idle cycle is not inserted, and a
collision occurs in cycle B between the read data from ROM and that from SRAM. In (b), an
idle cycle is inserted, and a data collision is prevented.
Bus cycle A
T1
T2
T3
Bus cycle B
T1
Bus cycle A
T1
T2
φ
φ
Address bus
Address bus
CS (area A)
CS (area A)
CS (area B)
CS (area B)
RD
RD
Data bus
Data bus
Long output floating time
T2
T3
Bus cycle B
TI
T1
Data collision
(a) Idle cycle not inserted
(ICIS1 = 0)
(b) Idle cycle inserted
(Initial value ICIS1 = 1)
Figure 7.21 Example of Idle Cycle Operation (1)
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Section 7 Bus Controller
(2) Write after Read
If an external write occurs after an external read while the ICIS0 bit in BCRH is set to 1, an
idle cycle is inserted at the start of the write cycle.
Figure 7.22 shows an example of the operation in this case. In this example, bus cycle A is a
read cycle from ROM with a long output floating time, and bus cycle B is a CPU write cycle.
In (a), an idle cycle is not inserted, and a collision occurs in cycle B between the read data
from ROM and the CPU write data. In (b), an idle cycle is inserted, and a data collision is
prevented.
Bus cycle A
φ
T1
T2
T3
Bus cycle B
T1
Bus cycle A
T2
φ
Address bus
Address bus
CS (area A)
CS (area A)
CS (area B)
CS (area B)
RD
RD
HWR
HWR
Data bus
Data bus
Long output floating time
(a) Idle cycle not inserted
(ICIS0 = 0)
T1
T2
T3
Bus cycle B
TI
T1
T2
Data collision
(b) Idle cycle inserted
(Initial value ICIS0 = 1)
Figure 7.22 Example of Idle Cycle Operation (2)
(3) Relationship between Chip Select (CS
CS)
RD)
CS Signal and Read (RD
RD Signal
Depending on the system’s load conditions, the RD signal may lag behind the CS signal. An
example is shown in figure 7.23.
In this case, with the setting for no idle cycle insertion (a), there may be a period of overlap
between the bus cycle A RD signal and the bus cycle B CS signal.
Setting idle cycle insertion, as in (b), however, will prevent any overlap between the RD and
CS signals.
In the initial state after reset release, idle cycle insertion (b) is set.
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Section 7 Bus Controller
Bus cycle A
φ
T1
T2
T3
Bus cycle B
T1
Bus cycle A
T2
φ
Address bus
Address bus
CS (area A)
CS (area A)
CS (area B)
CS (area B)
RD
RD
T1
T2
T3
Bus cycle B
TI
T1
Possibility of overlap between
CS (area B) and RD
(a) Idle cycle not inserted
(ICIS1 = 0)
(b) Idle cycle inserted
(Initial value ICIS1 = 1)
Figure 7.23 Relationship between Chip Select (CS
CS)
RD)
CS and Read (RD
RD
Table 7.4 shows pin states in an idle cycle.
Table 7.4
Pin States in Idle Cycle
Pins
Pin State
A23 to A0
Contents of next bus cycle
D15 to D0
High impedance
CSn
High
AS
High
RD
High
HWR
High
LWR
High
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T2
Section 7 Bus Controller
7.9
Bus Release
This LSI can release the external bus in response to a bus request from an external device. In the
external bus released state, the internal bus master continues to operate as long as there is no
external access.
In external extended mode, the bus can be released to an external device by setting the BRLE bit
in BCRL to 1. Driving the BREQ pin low issues an external bus request to this LSI. When the
BREQ pin is sampled, at the prescribed timing the BACK pin is driven low, and the address bus,
data bus, and bus control signals are placed in the high-impedance state, establishing the external
bus-released state.
In the external bus released state, an internal bus master can perform accesses using the internal
bus. When an internal bus master wants to make an external access, it temporarily defers
activation of the bus cycle, and waits for the bus request from the external bus master to be
dropped.
When the BREQ pin is driven high, the BACK pin is driven high at the prescribed timing and the
external bus released state is terminated.
In the event of simultaneous external bus release request and external access request generation,
the order of priority is as follows:
(High) External bus release > Internal bus master external access (Low)
Table 7.5 shows pin states in the external bus released state.
Table 7.5
Pin States in Bus Released State
Pins
Pin State
A23 to A0
High impedance
D15 to D0
High impedance
CSn
High impedance
AS
High impedance
RD
High impedance
HWR
High impedance
LWR
High impedance
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Section 7 Bus Controller
Figure 7.24 shows the timing for transition to the bus-released state.
CPU cycle
T0
T1
CPU
cycle
External bus released state
T2
φ
High impedance
Address bus
Address
High impedance
Data bus
High impedance
CSn
High impedance
AS
High impedance
RD
High impedance
HWR, LWR
BREQ
BACK
Minimum
1 state
[1]
[1]
[2]
[3]
[4]
[5]
[2]
[3]
[4]
[5]
Low level of BREQ pin is sampled at rise of T2 state.
BACK pin is driven low at end of CPU read cycle, releasing bus to external bus
master.
BREQ pin state is still sampled in external bus released state.
High level of BREQ pin is sampled.
BACK pin is driven high, ending bus release cycle.
Note : n = 7 to 0
Figure 7.24 Bus-Released State Transition Timing
7.9.1
Bus Release Usage Note
When MSTPCR is set to H'FFFFFF and transmitted to sleep mode, the external bus release does
not function. To activate the external bus release in sleep mode, do not set MSTPCR to H'FFFFFF.
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Section 7 Bus Controller
7.10
Bus Arbitration
This LSI has a bus arbiter that arbitrates bus master operations.
There are three bus masters, the CPU, DMAC*, and DTC, which perform read/write operations
when they have possession of the bus. Each bus master requests the bus by means of a bus request
signal. The bus arbiter determines priorities at the prescribed timing, and permits use of the bus by
means of a bus request acknowledge signal. The selected bus master then takes possession of the
bus and begins its operation.
Note: * Supported only by the H8S/2239 Group.
7.10.1
Operation
The bus arbiter detects the bus masters' bus request signals, and if the bus is requested, sends a bus
request acknowledge signal to the bus master making the request. If there are bus requests from
more than one bus master, the bus request acknowledge signal is sent to the one with the highest
priority. When a bus master receives the bus request acknowledge signal, it takes possession of the
bus until that signal is canceled.
The order of priority of the bus masters is as follows:
(High) DMAC* > DTC > CPU (Low)
An internal bus access by an internal bus master, and external bus release, can be executed in
parallel.
In the event of simultaneous external bus release request, and internal bus master external access
request generation, the order of priority is as follows:
(High) External bus release > Internal bus master external access (Low)
Note: * Supported only by the H8S/2239 Group.
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Section 7 Bus Controller
7.10.2
Bus Transfer Timing
Even if a bus request is received from a bus master with a higher priority than that of the bus
master that has acquired the bus and is currently operating, the bus is not necessarily transferred
immediately. There are specific times at which each bus master can relinquish the bus.
CPU: The CPU is the lowest-priority bus master, and if a bus request is received from the
DMAC* and DTC, the bus arbiter transfers the bus to the bus master that issued the request. The
timing for transfer of the bus is as follows:
• The bus is transferred at a break between bus cycles. However, if a bus cycle is executed in
discrete operations, as in the case of a longword-size access, the bus is not transferred between
the operations.
• If the CPU is in sleep mode, it transfers the bus immediately.
Note: * Supported only by the H8S/2239 Group.
DTC: The DTC sends the bus arbiter a request for the bus when an activation request is generated.
The DTC can release the bus after a vector read, a register information read (3 states), a single data
transfer, or a register information write (3 states). It does not release the bus during a register
information read (3 states), a single data transfer, or a register information write (3 states).
DMAC (Only by the H8S/2239 Group): The DMAC sends the bus arbiter a request for the bus
when an activation request is generated.
In the case of an external request in short address mode or normal mode, and in cycle steal mode,
the DMAC releases the bus after a single transfer.
In block transfer mode, it releases the bus after transfer of one block, and in burst mode, after
completion of the transfer.
7.10.3
External Bus Release Usage Note
External bus release can be performed on completion of an external bus cycle. The CS signal
remains low until the end of the external bus cycle. Therefore, when external bus release is
performed, the CS signal may change from the low level to the high-impedance state.
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Section 7 Bus Controller
7.11
Resets and the Bus Controller
In a power-on reset, this LSI, including the bus controller, enters the reset state at that point, and
an executing bus cycle is discontinued.
In a manual reset, the bus controller's registers and internal state are maintained, and an executing
external bus cycle is completed. In this case, WAIT input is ignored and write data is not
guaranteed.
When the DMAC* is initialized at the manual reset, DACK and TEND output is disabled. The
DMAC* operates as I/O port controlled by DDR and DR.
Note: * Supported only by the H8S/2239 Group.
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Section 7 Bus Controller
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Section 8 DMA Controller (DMAC)
Section 8 DMA Controller (DMAC)
The H8S/2239 Group has a built-in DMA controller (DMAC) which can carry out data transfer on
up to 4 channels.
Note: The DMAC is supported only by the H8S/2239 Group. It is not available in the H8S/2258
Group, H8S/2238 Group, H8S/2237 Group, and H8S/2227 Group.
8.1
Features
• Selectable as short address mode or full address mode
 Short Address Mode:
Maximum of 4 channels can be used
Dual address mode or single address mode can be selected
In dual address mode, one of the two addresses, transfer source and transfer destination, is
specified as 24 bits and the other as 16 bits
In single address mode, transfer source or transfer destination address only is specified as
24 bits
In single address mode, transfer can be performed in one bus cycle
Choice of sequential mode, idle mode, or repeat mode for dual address mode and single
address mode
 Full Address Mode:
Maximum of 2 channels can be used
Transfer source and transfer destination addresses as specified as 24 bits
Choice of normal mode or block transfer mode
• 16-Mbyte address space can be specified directly
• Byte or word can be set as the transfer unit
• Activation sources: internal interrupt, external request, auto-request (depending on transfer
mode)
Six 16-bit timer-pulse unit (TPU) compare match/input capture interrupts
Serial communication interface (SCI_0, SCI_1) transmit-data-empty interrupt, receive-datafull interrupt
A/D convert1er conversion end interrupt
External request
Auto-request
• Module stop mode can be set
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Section 8 DMA Controller (DMAC)
A block diagram of the DMAC is shown in figure 8.1.
Internal address bus
Address buffer
External pins
DMAWER
DMATCR
DMACR_0A
DMACR_0B
DMACR_1A
DMACR_1B
DMABCR
Channel 1
DREQ0
DREQ1
TEND0
TEND1
DACK0
DACK1
Interrupt signals
DEND0A
DEND0B
DEND1A
DEND1B
MAR_0AH
ETCR_0A
MAR_0BH
ETCR_0B
MAR_1AH
MAR_1AL
IOAR_1A
ETCR_1A
MAR_1BH
Internal data bus
DMA write enable register
DMA terminal control register
DMA band control register (for all channels)
DMA control register
Memory address register
I/O address register
Execute transfer count register
Figure 8.1 Block Diagram of DMAC
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MAR_0BL
IOAR_0B
Data buffer
Legend:
DMAWER:
DMATCR:
DMABCR:
DMACR:
MAR:
IOAR:
ETCR:
MAR_0AL
IOAR_0A
MAR_1BL
IOAR_1B
ETCR_1B
Module data bus
Control logic
Channel 0
Processor
Channel 1B Channel 1A Channel 0B Channel 0A
Internal interrupts
TGI0A
TGI1A
TGI2A
TGI3A
TGI4A
TGI5A
TXI0
RXI0
TXI1
RXI1
ADI
Section 8 DMA Controller (DMAC)
8.2
Input/Output Pins
Table 8.1 shows the pin configuration of the interrupt controller.
Table 8.1
Pin Configuration
Channel
Pin Name
Symbol
I/O
Function
0
DMA request 0
DREQ0
Input
Channel 0 external request
DMA transfer acknowledge 0
DACK0
Output
Channel 0 single address
transfer acknowledge
DMA transfer end 0
TEND0
Output
Channel 0 transfer end
DMA request 1
DREQ1
Input
Channel 1 external request
DMA transfer acknowledge 1
DACK1
Output
Channel 1 single address
transfer acknowledge
DMA transfer end 1
TEND1
Output
Channel 1 transfer end
1
8.3
Register Descriptions
• Memory address register_0AH (MAR_0AH)
• Memory address register_0AL (MAR_0AL)
• I/O address register_0A (IOAR_0A)
• Transfer count register_0A (ETCR_0A)
• Memory address register_0BH (MAR_0BH)
• Memory address register_0BL (MAR_0BL)
• I/O address register_0B (IOAR_0B)
• Transfer count register_0B (ETCR_0B)
• Memory address register_1AH (MAR_1AH)
• Memory address register_1AL (MAR_1AL)
• I/O address register_1A (IOAR_1A)
• Transfer count register_1A (ETCR_1B)
• Memory address register_1BH (MAR_1BH)
• Memory address register_1BL (MAR_1BL)
• I/O address register_1B (IOAR_1B)
• Transfer count register_1B (ETCR_1B)
• DMA control register_0A (DMACR_0A)
• DMA control register_0B (DMACR_0B)
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Section 8 DMA Controller (DMAC)
• DMA control register_1A (DMACR_1A)
• DMA control register_1B (DMACR_1B)
• DMA band control register H (DMABCRH)
• DMA band control register L (DMABCRL)
• DMA write enable register (DMAWER)
• DMA terminal control register (DMATCR)
The functions of MAR, IOAR, ETCR, DMACR, and DMABCR differ according to the transfer
mode (short address mode or full address mode). The transfer mode can be selected by means of
the FAE1 and FAE0 bits in DMABCRH. The register configurations for short address mode and
full address mode of channel 0 are shown in table 8.2.
Table 8.2
Short Address Mode and Full Address Mode (Channel 0)
Description
0
Short address mode specified (channels 0A and 0B operate independently)
Channel 0B
Channel 0A
FAE0
MAR_0AL
IOAR_0A
ETCR_0A
Specifies number of transfers
DMACR_0A
MAR_0BH
Specifies transfer source/transfer destination address
Specifies transfer destination/transfer source address
MAR_0BL
Specifies transfer size, mode, activation source.
Specifies transfer source/transfer destination address
IOAR_0B
Specifies transfer destination/transfer source address
ETCR_0B
Specifies number of transfers
DMACR_0B
Specifies transfer size, mode, activation source.
Full address mode specified (channels 0A and 0B operate in combination as channel 0)
Channel 0
1
MAR_0AH
MAR_0AH
MAR_0AL
Specifies transfer source address
MAR_0BH
MAR_0BL
Specifies transfer destination address
IOAR_0A
Not used
Not used
IOAR_0B
ETCR_0A
ETCR_0B
DMACR_0A DMACR_0B
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Specifies number of transfers
Specifies number of transfers (used in block transfer
mode only)
Specifies transfer size, mode, activation source, etc.
Section 8 DMA Controller (DMAC)
8.3.1
Memory Address Registers (MARA and MARB)
MAR is a 32-bit readable/writable register that specifies the source address (transfer source
address) or destination address (transfer destination address). MAR consists of two 16-bit registers
MARH and MARL. The upper 8 bits of MARH are reserved: they are always read as 0, and
cannot be modified.
The DMA has four MAR registers: MAR_0A in channel 0 (channel 0A), MAR_0B in channel 0
(channel 0B), MAR_1A in channel 1 (channel 1A), and MAR_1B in channel 1 (channel 1B).
MAR is not initialized by a reset or in standby mode.
Short Address Mode: In short address mode, MARA and MARB operate independently.
Whether MAR functions as the source address register or as the destination address register can be
selected by means of the DTDIR bit in DMACR.
MAR is incremented or decremented each time a byte or word transfer is executed, so that the
address specified by MAR is constantly updated.
Full Address Mode: In full address mode, MARA functions as the source address register, and
MARB as the destination address register.
MAR is incremented or decremented each time a byte or word transfer is executed, so that the
source or destination address is constantly updated.
8.3.2
I/O Address Registers (IOARA and IOARB)
IOAR is a 16-bit readable/writable register that specifies the lower 16 bits of the source address
(transfer source address) or destination address (transfer destination address). The upper 8 bits of
the transfer address are automatically set to H'FF.
The DMA has four IOAR registers: IOAR_0A in channel 0 (channel 0A), IOAR_0B in channel 0
(channel 0B), IOAR_1A in channel 1 (channel 1A), and IOAR_1B in channel 1 (channel 1B).
Whether IOAR functions as the source address register or as the destination address register can
be selected by means of the DTDIR bit in DMACR.
IOAR is not incremented or decremented each time a data transfer is executed, so the address
specified by IOAR is fixed.
IOAR is not initialized by a reset or in standby mode.
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Section 8 DMA Controller (DMAC)
IOAR can be used in short address mode but not in full address mode.
8.3.3
Execute Transfer Count Registers (ETCRA and ETCRB)
ETCR is a 16-bit readable/writable register that specifies the number of transfers.
The DMA has four ETCR registers: ETCR_0A in channel 0 (channel 0A), ETCR_0B in channel 0
(channel 0B), ETCR_1A in channel 1 (channel 1A), and ETCR_1B in channel 1 (channel 1B).
ETCR is not initialized by a reset or in standby mode.
Short Address Mode: The function of ETCR in sequential mode and idle mode differs from that
in repeat mode.
In sequential mode and idle mode, ETCR functions as a 16-bit transfer counter. ETCR is
decremented by 1 each time a transfer is performed, and when the count reaches H'00, the DTE bit
in DMABCRL is cleared, and transfer ends.
In repeat mode, ETCRL functions as an 8-bit transfer counter and ETCRH functions as a transfer
count holding register. ETCRL is decremented by 1 each time a transfer is performed, and when
the count reaches H'00, ETCRL is loaded with the value in ETCRH. At this point, MAR is
automatically restored to the value it had when the count was started. The DTE bit in DMABCRL
is not cleared, and so transfers can be performed repeatedly until the DTE bit is cleared by the
user.
Full Address Mode: The function of ETCR in normal mode differs from that in block transfer
mode.
In normal mode, ETCRA functions as a 16-bit transfer counter. ETCRA is decremented by 1 each
time a data transfer is performed, and transfer ends when the count reaches H'0000. ETCRB is not
used in normal mode.
In block transfer mode, ETCRAL functions as an 8-bit block size counter and ETCRAH functions
as a block size holding register. ETCRAL is decremented by 1 each time a 1-byte or 1-word
transfer is performed, and when the count reaches H'00, ETCRAL is loaded with the value in
ETCRAH. So by setting the block size in ETCRAH and ETCRAL, it is possible to repeatedly
transfer blocks consisting of any desired number of bytes or words.
In block transfer mode, ETCRB functions as a 16-bit block transfer counter. ETCRB is
decremented by 1 each time a block is transferred, and transfer ends when the count reaches
H'0000.
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Section 8 DMA Controller (DMAC)
8.3.4
DMA Control Registers (DMACRA and DMACRB)
DMACR controls the operation of each DMAC channel.
The DMA has four DMACR registers: DMACR_0A in channel 0 (channel 0A), DMACR_0B in
channel 0 (channel 0B), DMACR_1A in channel 1 (channel 1A), and DMACR_1B in channel 1
(channel 1B).
In short address mode, channels A and B operate independently, and in full address mode,
channels A and B operate together. The bit functions in the DMACR registers differ according to
the transfer mode.
(1) Short Address Mode
• DMACR_0A, DMACR_0B, DMACR_1A, and DMARC_1B
Bit
Bit Name
Initial Value
R/W
Description
7
DTSZ
0
R/W
Data Transfer Size
Selects the size of data to be transferred at
one time.
0: Byte-size transfer
1: Word-size transfer
6
DTID
0
R/W
Data Transfer Increment/Decrement
Selects incrementing or decrementing of MAR
after every data transfer in sequential mode or
repeat mode. In idle mode, MAR is neither
incremented nor decremented.
0: MAR is incremented after a data transfer
(Initial value)
•
When DTSZ = 0, MAR is incremented by 1
•
When DTSZ = 1, MAR is incremented by 2
1: MAR is decremented after a data transfer
•
When DTSZ = 0, MAR is decremented by
1
•
When DTSZ = 1, MAR is decremented by
2
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
5
RPE
0
R/W
Repeat Enable
Used in combination with the DTIE bit in
DMABCR to select the mode (sequential, idle,
or repeat) in which transfer is to be performed.
When DTIE = 0 (no transfer end interrupt)
0: Transfer in sequential mode
1: Transfer in repeat mode
When DTIE = 1 (with transfer end interrupt)
0: Transfer in sequential mode
1: Transfer in idle mode
4
DTDIR
0
R/W
Data Transfer Direction
Used in combination with the SAE bit in
DMABCR to specify the data transfer direction
(source or destination). The function of this bit
is therefore different in dual address mode and
single address mode.
When SAE = 0
0: Transfer with MAR as source address and
IOAR as destination address
1: Transfer with IOAR as source address and
MAR as destination address
When SAE = 1
0: Transfer with MAR as source address and
DACK pin as write strobe
1: Transfer with DACK pin as read strobe and
MAR as destination address
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
3
DTF3
0
R/W
Data Transfer Factor 3 to 0
2
DTF2
0
R/W
1
DTF1
0
R/W
0
DTF0
0
R/W
These bits select the data transfer factor
(activation source). There are some
differences in activation sources for channel A
and channel B.
Channel A:
0000: Setting prohibited
0001: Activated by A/D converter conversion
end interrupt
0010: Setting prohibited
0011: Setting prohibited
0100: Activated by SCI channel 0 transmitdata-empty interrupt
0101: Activated by SCI channel 0 receivedata-full interrupt
0110: Activated by SCI channel 1 transmitdata-empty interrupt
0111: Activated by SCI channel 1 receivedata-full interrupt
1000: Activated by TPU channel 0 compare
match/input capture A interrupt
1001: Activated by TPU channel 1 compare
match/input capture A interrupt
1010: Activated by TPU channel 2 compare
match/input capture A interrupt
1011: Activated by TPU channel 3 compare
match/input capture A interrupt
1100: Activated by TPU channel 4 compare
match/input capture A interrupt
1101: Activated by TPU channel 5 compare
match/input capture A interrupt
1110: Setting prohibited
1111: Setting prohibited
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
3
DTF3
0
R/W
Channel B:
2
DTF2
0
R/W
0000: Setting prohibited
1
DTF1
0
R/W
0
DTF0
0
R/W
0001: Activated by A/D converter conversion
end interrupt
0010: Activated by DREQ pin falling edge
input (detected as a low level in the first
transfer after transfer is enabled)
0011: Activated by DREQ pin low-level input
0100: Activated by SCI channel 0 transmitdata-empty interrupt
0101: Activated by SCI channel 0 receivedata-full interrupt
0110: Activated by SCI channel 1 transmitdata-empty interrupt
0111: Activated by SCI channel 1 receivedata-full interrupt
1000: Activated by TPU channel 0 compare
match/input capture A interrupt
1001: Activated by TPU channel 1 compare
match/input capture A interrupt
1010: Activated by TPU channel 2 compare
match/input capture A interrupt
1011: Activated by TPU channel 3 compare
match/input capture A interrupt
1100: Activated by TPU channel 4 compare
match/input capture A interrupt
1101: Activated by TPU channel 5 compare
match/input capture A interrupt
1110: Setting prohibited
1111: Setting prohibited
The same factor can be selected for more than
one channel. In this case, activation starts with
the highest-priority channel according to the
relative channel priorities. For relative channel
priorities, see section 8.5.11, Multi-Channel
Operation.
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Section 8 DMA Controller (DMAC)
(2) Full Address Mode
• DMACR_0A and DMACR_1A
Bit
Bit Name
Initial Value
R/W
Description
15
DTSZ
0
R/W
Data Transfer Size
Selects the size of data to be transferred at
one time.
0: Byte-size transfer
1: Word-size transfer
14
SAID
0
R/W
Source Address Increment/Decrement
13
SAIDE
0
R/W
Source Address Increment/Decrement Enable
These bits specify whether source address
register MARA is to be incremented,
decremented, or left unchanged, when data
transfer is performed.
00: MARA is fixed
01: MARA is incremented after a data transfer
•
When DTSZ = 0, MARA is incremented by
1
•
When DTSZ = 1, MARA is incremented by
2
10: MARA is fixed
11: MARA is decremented after a data transfer
•
When DTSZ = 0, MARA is decremented by
1
•
When DTSZ = 1, MARA is decremented by
2
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
12
BLKDIR
0
R/W
Block Direction
11
BLKE
0
R/W
Block Enable
These bits specify whether normal mode or
block transfer mode is to be used for data
transfer. If block transfer mode is specified, the
BLKDIR bit specifies whether the source side
or the destination side is to be the block area.
×0: Transfer in normal mode
01: Transfer in block transfer mode
(destination side is block area)
11: Transfer in block transfer mode (source
side is block area)
10 to
8

All 0
Legend:
×: Don’t care
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R/W
Reserved
These bits can be read from or written to.
However, the write value should always be 0.
Section 8 DMA Controller (DMAC)
• DMACR_0B and DMACR_1B
Bit
Bit Name
Initial Value
R/W
Description
7

0
R/W
Reserved
This bit can be read from or written to.
However, the write value should always be 0.
6
5
DAID
DAIDE
0
0
R/W
R/W
Destination Address Increment/Decrement
Destination Address Increment/Decrement
Enable
These bits specify whether destination address
register MARB is to be incremented,
decremented, or left unchanged, when data
transfer is performed.
00: MARB is fixed
01: MARB is incremented after a data transfer
•
When DTSZ = 0, MARB is incremented by
1
•
When DTSZ = 1, MARB is incremented by
2
10: MARB is fixed
11: MARB is decremented after a data transfer
4
—
0
R/W
•
When DTSZ = 0, MARB is decremented by
1
•
When DTSZ = 1, MARB is decremented by
2
Reserved
This bit can be read from or written to.
However, the write value should always be 0.
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
3
DTF3
0
R/W
Data Transfer Factor 3 to 0
2
DTF2
0
R/W
1
DTF1
0
R/W
0
DTF0
0
R/W
These bits select the data transfer factor
(activation source). The factors that can be
specified differ between normal mode and block
transfer mode.
Normal Mode
0000: Setting prohibited
0001: Setting prohibited
0010: Activated by DREQ pin falling edge input
(detected as a low level in the first
transfer after transfer is enabled)
0011: Activated by DREQ pin low-level input
010×: Setting prohibited
0110: Auto-request (cycle steal)
0111: Auto-request (burst)
1×××: Setting prohibited
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
3
DTF3
0
R/W
Block Transfer Mode
2
DTF2
0
R/W
0000: Setting prohibited
1
DTF1
0
R/W
0
DTF0
0
R/W
0001: Activated by A/D converter conversion
end interrupt
0010: Activated by DREQ pin falling edge input
(detected as a low level in the first
transfer after transfer is enabled)
0011: Activated by DREQ pin low-level input
0100: Activated by SCI channel 0 transmitdata-empty interrupt
0101: Activated by SCI channel 0 receive-datafull interrupt
0110: Activated by SCI channel 1 transmitdata-empty interrupt
0111: Activated by SCI channel 1 receive-datafull interrupt
1000: Activated by TPU channel 0 compare
match/input capture A interrupt
1001: Activated by TPU channel 1 compare
match/input capture A interrupt
1010: Activated by TPU channel 2 compare
match/input capture A interrupt
1011: Activated by TPU channel 3 compare
match/input capture A interrupt
1100: Activated by TPU channel 4 compare
match/input capture A interrupt
1101: Activated by TPU channel 5 compare
match/input capture A interrupt
1110: Setting prohibited
1111: Setting prohibited
The same factor can be selected for more than
one channel. In this case, activation starts with
the highest-priority channel according to the
relative channel priorities. For relative channel
priorities, see section 8.5.11, Multi-Channel
Operation.
Legend:
×: Don’t care
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Section 8 DMA Controller (DMAC)
8.3.5
DMA Band Control Registers H and L (DMABCRH and DMABCRL)
DMABCR controls the operation of each DMAC channel. The bit functions in the DMACR
registers differ according to the transfer mode.
(1) Short Address Mode
• DMABCRH
Bit
Bit Name
Initial Value
R/W
Description
15
FAE1
0
R/W
Full Address Enable 1
Specifies whether channel 1 is to be used in
short address mode or full address mode. In
short address mode, channels 1A and 1B can
be used as independent channels.
0: Short address mode
1: Full address mode
14
FAE0
0
R/W
Full Address Enable 0
Specifies whether channel 0 is to be used in
short address mode or full address mode. In
short address mode, channels 0A and 0B can
be used as independent channels.
0: Short address mode
1: Full address mode
13
SAE1
0
R/W
Single Address Enable 1
Specifies whether channel 1B is to be used for
transfer in dual address mode or single address
mode. This bit is invalid in full address mode.
0: Dual address mode
1: Single address mode
12
SAE0
0
R/W
Single Address Enable 0
Specifies whether channel 0B is to be used for
transfer in dual address mode or single address
mode. This bit is invalid in full address mode.
0: Dual address mode
1: Single address mode
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
11
DTA1B
0
R/W
Data Transfer Acknowledge 1B
10
DTA1A
0
R/W
Data Transfer Acknowledge 1A
9
DTA0B
0
R/W
Data Transfer Acknowledge 0B
8
DTA0A
0
R/W
Data Transfer Acknowledge 0A
These bits enable or disable clearing when
DMA transfer is performed for the internal
interrupt source selected by the DTF3 to DTF0
bits in DMACR.
It the DTA bit is set to 1 when DTE = 1, the
internal interrupt source is cleared automatically
by DMA transfer. When DTE = 1 and DTA = 1,
the internal interrupt source does not issue an
interrupt request to the CPU or DTC.
If the DTA bit is cleared to 0 when DTE = 1, the
internal interrupt source is not cleared when a
transfer is performed, and can issue an interrupt
request to the CPU or DTC in parallel. In this
case, the interrupt source should be cleared by
the CPU or DTC transfer.
When DTE = 0, the internal interrupt source
issues an interrupt request to the CPU or DTC
regardless of the DTA bit setting.
0: Clearing is disabled when DMA transfer is
performed for the selected internal interrupt
source
1: Clearing is enabled when DMA transfer is
performed for the selected internal interrupt
source
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Section 8 DMA Controller (DMAC)
• DMABCRL
Bit
Bit Name
Initial Value
R/W
Description
7
DTE1B
0
R/W
Data Transfer Enable 1B
6
DTE1A
0
R/W
Data Transfer Enable 1A
5
DTE0B
0
R/W
Data Transfer Enable 0B
4
DTE0A
0
R/W
Data Transfer Enable 0A
If the DTE bit is cleared to 0 when DTIE = 1, the
DMAC regards this as indicating the end of a
transfer, and issues a transfer end interrupt
request to the CPU or DTC.
When DTE = 0, data transfer is disabled and
the DMAC ignores the activation source
selected by the DTF3 to DTF0 bits in DMACR.
When DTE = 1, data transfer is enabled and the
DMAC waits for a request by the activation
source selected by the DTF3 to DTF0 bits in
DMACR. When a request is issued by the
activation source, DMA transfer is executed.
0: Data transfer is disabled
1: Data transfer is enabled
[Clearing conditions]
•
When initialization is performed
•
When the specified number of transfers
have been completed in a transfer mode
other than repeat mode
•
When 0 is written to the DTE bit to forcibly
suspend the transfer, or for a similar reason
[Setting condition]
When 1 is written to the DTE bit after reading
DTE = 0
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
3
DTIE1B
0
R/W
2
DTIE1A
0
R/W
1
DTIE0B
0
R/W
Data Transfer End Interrupt Enable 1B
Data Transfer End Interrupt Enable 1A
Data Transfer End Interrupt Enable 0B
Data Transfer End Interrupt Enable 0A
0
DTIE0A
0
R/W
These bits enable or disable an interrupt to the
CPU or DTC when transfer ends. If the DTIE bit
is set to 1 when DTE = 0, the DMAC regards
this as indicating the end of a transfer, and
issues a transfer end interrupt request to the
CPU or DTC.
A transfer end interrupt can be canceled either
by clearing the DTIE bit to 0 in the interrupt
handling routine, or by performing processing to
continue transfer by setting the transfer counter
and address register again, and then setting the
DTE bit to 1.
0: Transfer end interrupt is disabled
1: Transfer end interrupt is enabled
(2) Full Address Mode
• DMABCRH
Bit
Bit Name
Initial Value
R/W
Description
15
FAE1
0
R/W
Full Address Enable 1
Specifies whether channel 1 is to be used in
short address mode or full address mode.
In full address mode, channels 1A and 1B are
used together as channel 1.
0: Short address mode
1: Full address mode
14
FAE0
0
R/W
Full Address Enable 0
Specifies whether channel 0 is to be used in
short address mode or full address mode.
In full address mode, channels 0A and 0B are
used together as channel 0.
0: Short address mode
1: Full address mode
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
13, 12
—
All 0
R/W
Reserved
These bits can be read from or written to.
However, the write value should always be 0.
11
DTA1
0
R/W
Data Transfer Acknowledge 1
These bits enable or disable clearing when
DMA transfer is performed for the internal
interrupt source selected by the DTF3 to DTF0
bits in DMACR of channel 1.
It the DTA1 bit is set to 1 when DTE1 = 1, the
internal interrupt source is cleared automatically
by DMA transfer. When DTE1 = 1 and DTA1 =
1, the internal interrupt source does not issue
an interrupt request to the CPU or DTC.
It the DTA1 bit is cleared to 0 when DTE1 = 1,
the internal interrupt source is not cleared when
a transfer is performed, and can issue an
interrupt request to the CPU or DTC in parallel.
In this case, the interrupt source should be
cleared by the CPU or DTC transfer.
When DTE1 = 0, the internal interrupt source
issues an interrupt request to the CPU or DTC
regardless of the DTA1 bit setting.
The state of the DTME1 bit does not affect the
above operations.
0: Clearing is disabled when DMA transfer is
performed for the selected internal interrupt
source
1: Clearing is enabled when DMA transfer is
performed for the selected internal interrupt
source
10
—
0
R/W
Reserved
This bit can be read from or written to. However,
the write value should always be 0.
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
9
DTA0
0
R/W
Data Transfer Acknowledge 0
These bits enable or disable clearing when
DMA transfer is performed for the internal
interrupt source selected by the DTF3 to DTF0
bits in DMACR of channel 0.
It the DTA0 bit is set to 1 when DTE0 = 1, the
internal interrupt source is cleared automatically
by DMA transfer. When DTE0 = 1 and DTA0 =
1, the internal interrupt source does not issue
an interrupt request to the CPU or DTC.
It the DTA0 bit is cleared to 0 when DTE0 = 1,
the internal interrupt source is not cleared when
a transfer is performed, and can issue an
interrupt request to the CPU or DTC in parallel.
In this case, the interrupt source should be
cleared by the CPU or DTC transfer.
When DTE0 = 0, the internal interrupt source
issues an interrupt request to the CPU or DTC
regardless of the DTA0 bit setting.
The state of the DTME0 bit does not affect the
above operations.
0: Clearing is disabled when DMA transfer is
performed for the selected internal interrupt
source
1: Clearing is enabled when DMA transfer is
performed for the selected internal interrupt
source
8
—
0
R/W
Reserved
This bit can be read from or written to. However,
the write value should always be 0.
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Section 8 DMA Controller (DMAC)
• DMABCRL
Bit
Bit Name
Initial Value
R/W
Description
7
DTME1
0
R/W
Data Transfer Master Enable 1
Together with the DTE1 bit, this bit controls
enabling or disabling of data transfer on
channel 1. When both the DTME1 bit and DTE1
bit are set to 1, transfer is enabled for channel
1.
If channel 1 is in the middle of a burst mode
transfer when an NMI interrupt is generated, the
DTME1 bit is cleared, the transfer is interrupted,
and bus mastership passes to the CPU. When
the DTME1 bit is subsequently set to 1 again,
the interrupted transfer is resumed. In block
transfer mode, however, the DTME1 bit is not
cleared by an NMI interrupt, and transfer is not
interrupted.
0: Data transfer is disabled
1: Data transfer is enabled
[Clearing conditions]
•
When initialization is performed
•
When NMI is input in burst mode
•
When 0 is written to the DTME1 bit
[Setting condition]
When 1 is written to DTME1 after reading
DTME1 = 0
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
6
DTE1
0
R/W
Data Transfer Enable 1
Enables or disables DMA transfer for the
activation source selected by the DTF3 to DTF0
bits in DMACR of channel 1.
When DTE1 = 0, data transfer is disabled and
the activation source is ignored. If the activation
source is an internal interrupt, an interrupt
request is issued to the CPU or DTC. If the
DTE1 bit is cleared to 0 when DTIE1 = 1, the
DMAC regards this as indicating the end of a
transfer, and issues a transfer end interrupt
request to the CPU.
When DTE1 = 1 and DTME1 = 1, data transfer
is enabled and the DMAC waits for a request by
the activation source. When a request is issued
by the activation source, DMA transfer is
executed.
0: Data transfer is disabled
1: Data transfer is enabled
[Clearing conditions]
•
When initialization is performed
•
When the specified number of transfers
have been completed
•
When 0 is written to the DTE1 bit to forcibly
suspend the transfer, or for a similar reason
[Setting condition]
When 1 is written to the DTE1 bit after reading
DTE1 = 0
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
5
DTME0
0
R/W
Data Transfer Master Enable 0
Together with the DTE0 bit, this bit controls
enabling or disabling of data transfer on
channel 0. When both the DTME0 bit and DTE0
bit are set to 1, transfer is enabled for channel
0.
If channel 0 is in the middle of a burst mode
transfer when an NMI interrupt is generated, the
DTME0 bit is cleared, the transfer is interrupted,
and bus mastership passes to the CPU. When
the DTME0 bit is subsequently set to 1 again,
the interrupted transfer is resumed. In block
transfer mode, however, the DTME0 bit is not
cleared by an NMI interrupt, and transfer is not
interrupted.
0: Data transfer is disabled
1: Data transfer is enabled
[Clearing conditions]
•
When initialization is performed
•
When NMI is input in burst mode
•
When 0 is written to the DTME0 bit
[Setting condition]
When 1 is written to DTME0 after reading
DTME0 = 0
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
4
DTE0
0
R/W
Data Transfer Enable 0
Enables or disables DMA transfer for the
activation source selected by the DTF3 to DTF0
bits in DMACR of channel 0.
When DTE0 = 0, data transfer is disabled and
the activation source is ignored. If the activation
source is an internal interrupt, an interrupt
request is issued to the CPU or DTC. If the
DTE0 bit is cleared to 0 when DTIE0 = 1, the
DMAC regards this as indicating the end of a
transfer, and issues a transfer end interrupt
request to the CPU.
When DTE0 = 1 and DTME0 = 1, data transfer
is enabled and the DMAC waits for a request by
the activation source. When a request is issued
by the activation source, DMA transfer is
executed.
0: Data transfer is disabled
1: Data transfer is enabled
[Clearing conditions]
• When initialization is performed
• When the specified number of transfers
have been completed
• When 0 is written to the DTE0 bit to forcibly
suspend the transfer, or for a similar reason
[Setting condition]
When 1 is written to the DTE0 bit after reading
DTE0 = 0
3
DTIE1B
0
R/W
Data Transfer Interrupt Enable 1B
Enables or disables an interrupt to the CPU or
DTC when transfer on channel 1 is interrupted.
If the DTME1 bit is cleared to 0 when DTIE1B =
1, the DMAC regards this as indicating a break
in the transfer, and issues a transfer break
interrupt request to the CPU or DTC.
A transfer break interrupt can be canceled
either by clearing the DTIE1B bit to 0 in the
interrupt handling routine, or by performing
processing to continue transfer by setting the
DTME1 bit to 1.
0: Data transfer is disabled
1: Data transfer is enabled
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Section 8 DMA Controller (DMAC)
Bit
Bit Name
Initial Value
R/W
Description
2
DTIE1A
0
R/W
Data Transfer End Interrupt Enable 1A
Enables or disables an interrupt to the CPU or
DTC when transfer ends. If the DTE1 bit is
cleared to 1 when DTIE1A = 1, the DMAC
regards this as indicating the end of a transfer,
and issues a transfer end interrupt request to
the CPU or DTC.
A transfer end interrupt can be canceled either
by clearing the DTIE1A bit to 0 in the interrupt
handling routine, or by performing processing to
continue transfer by setting the transfer counter
and address register again, and then setting the
DTE1 bit to 1.
0: Data transfer is disabled
1: Data transfer is enabled
1
DTIE0B
0
R/W
Data Transfer Interrupt Enable 0B
Enables or disables an interrupt to the CPU or
DTC when transfer on channel 1 is interrupted.
If the DTME0 bit is cleared to 0 when DTIE0B =
1, the DMAC regards this as indicating a break
in the transfer, and issues a transfer break
interrupt request to the CPU or DTC.
A transfer break interrupt can be canceled
either by clearing the DTIE0B bit to 0 in the
interrupt handling routine, or by performing
processing to continue transfer by setting the
DTME0 bit to 1.
0: Data transfer is disabled
1: Data transfer is enabled
0
DTIE0A
0
R/W
Data Transfer End Interrupt Enable 0A
Enables or disables an interrupt to the CPU or
DTC when transfer ends. If the DTE0 bit is
cleared to 0 when DTIE0A = 1, the DMAC
regards this as indicating the end of a transfer,
and issues a transfer end interrupt request to
the CPU or DTC.
A transfer end interrupt can be canceled either
by clearing the DTIE0A bit to 0 in the interrupt
handling routine, or by performing processing to
continue transfer by setting the transfer counter
and address register again, and then setting the
DTE0 bit to 1.
0: Data transfer is disabled
1: Data transfer is enabled
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Section 8 DMA Controller (DMAC)
8.3.6
DMA Write Enable Register (DMAWER)
The DMAC can activate the DTC with a transfer end interrupt, rewrite the channel on which the
transfer ended using a DTC chain transfer, and then reactivate the DTC. DMAWER applies
restrictions for changing all bits of DMACR, and specific bits for DMATCR and DMABCR for
the specific channel, to prevent inadvertent rewriting of registers other than those for the channel
concerned. The restrictions applied by DMAWER are valid for the DTC.
Bit
Bit Name
Initial Value
R/W
Description
7 to 4

All 0
−
Reserved
These bits are always read as 0 and cannot be
modified.
3
WE1B
0
R/W
Write Enable 1B
Enables or disables writes to all bits in
DMACR1B, bits 11, 7, and 3 in DMABCR, and
bit 5 in DMATCR.
0: Writes are disabled
1: Writes are enabled
2
WE1A
0
R/W
Write Enable 1A
Enables or disables writes to all bits in
DMACR1A, and bits 10, 6, and 2 in DMABCR.
0: Writes are disabled
1: Writes are enabled
1
WE0B
0
R/W
Write Enable 0B
Enables or disables writes to all bits in
DMACR0B, bits 9, 5, and 1 in DMABCR, and bit
4 in DMATCR.
0: Writes are disabled
1: Writes are enabled
0
WE0A
0
R/W
Write Enable 0A
Enables or disables writes to all bits in
DMACR0A, and bits 8, 4, and 0 in DMABCR.
0: Writes are disabled
1: Writes are enabled
Figure 8.2 shows the transfer areas for activating the DTC with a channel 0A transfer end interrupt
request, and reactivating channel 0A. The address register and count register areas are set again
during the first DTC transfer, then the control register area is set again during the second DTC
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Section 8 DMA Controller (DMAC)
chain transfer. When re-setting the control register area, perform masking by setting bits in
DMAWER to prevent modification of the contents of other channels.
MAR_0AH
First transfer area
MAR_0AL
IOAR_0A
ETCR_0A
MAR_0BH
MAR_0BL
IOAR_0B
ETCR_0B
MAR_1AH
MAR_1AL
DTC
IOAR_1A
ETCR_1A
MAR_1BH
MAR_1BL
IOAR_1B
ETCR_1B
DMAWER
DMATCR
DMACR_0A DMACR_0B
DMACR_1A DMACR_1B
Second transfer area
using chain transfer
DMABCR
Figure 8.2 Areas for Register Re-Setting by DTC (Channel 0A)
Writes by the DTC to bits 15 to 12 (FAE and SAE) in DMABCR are invalid regardless of the
DMAWER settings. These bits should be changed, if necessary, by CPU processing.
In writes by the DTC to bits 7 to 4 (DTE) in DMABCR, 1 can be written without first reading 0.
To reactivate a channel set to full address mode, write 1 to both Write Enable A and Write Enable
B for the channel to be reactivated.
MAR, IOAR, and ETCR can always be written to regardless of the DMAWER settings. When
modifying these registers, the channel to be modified should be halted.
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Section 8 DMA Controller (DMAC)
8.3.7
DMA Terminal Control Register (DMATCR)
DMATCR controls enabling or disabling of output from the DMAC transfer end pin. A port can
be set for output automatically, and a transfer end signal output, by setting the appropriate bit. The
TEND pin is available only for channel B in short address mode. Except for the block transfer
mode, a transfer end signal asserts in the transfer cycle in which the transfer counter contents
reaches 0 regardless of the activation source. In the block transfer mode, a transfer end signal
asserts in the transfer cycle in which the block counter contents reaches 0.
Bit
Bit Name
Initial Value
R/W
Description
7, 6

All 0

Reserved
These bits are always read as 0 and cannot be
modified.
5
TEE1
0
R/W
Transfer End Enable 1
Enables or disables transfer end pin 1 (TEND1)
output.
0: TEND1 pin output disabled
1: TEND1 pin output enabled
4
TEE0
0
R/W
Transfer End Enable 0
Enables or disables transfer end pin 0 (TEND0)
output.
0: TEND0 pin output disabled
1: TEND0 pin output enabled
3 to 0

All 0

Reserved
These bits are always read as 0 and cannot be
modified.
8.4
Activation Sources
DMAC activation sources consist of internal interrupt requests, external requests, and autorequests. The DMAC activation sources that can be specified depend on the transfer mode and
channel, as shown in table 8.3.
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Section 8 DMA Controller (DMAC)
Table 8.3
DMAC Activation Sources
Short Address Mode
Channels
0A and 1A
Channels
0B and 1B
Normal
Mode
Block
Transfer
Mode
ADI
O
O
×
O
TXI0
O
O
×
O
RXI0
O
O
×
O
TXI1
O
O
×
O
RXI1
O
O
×
O
TGI0A
O
O
×
O
TGI1A
O
O
×
O
TGI2A
O
O
×
O
TGI3A
O
O
×
O
TGI4A
O
O
×
O
Activation Source
Internal
interrupts
External
requests
Full Address Mode
TGI5A
O
O
×
O
DREQ pin falling edge input
×
O
O
O
DREQ pin low-level input
×
O
O
O
×
×
O
×
Auto-request
Legend:
O: Can be specified
×:
Cannot be specified
8.4.1
Activation by Internal Interrupt Request
An interrupt request selected as a DMAC activation source can also simultaneously generate an
interrupt request for the CPU or DTC. For details, see section 5, Interrupt Controller.
With activation by an internal interrupt request, the DMAC accepts the interrupt request
independently of the interrupt controller. Consequently, interrupt controller priority settings are
irrelevant.
If the DMAC is activated by a CPU interrupt source or an interrupt request that is not used as a
DTC activation source (DTA = 1), the interrupt request flag is cleared automatically by the DMA
transfer. With ADI, TXI, and RXI interrupts, however, the interrupt source flag is not cleared
unless the relevant register is accessed in a DMA transfer. If the same interrupt is used as an
activation source for more than one channel, the interrupt request flag is cleared when the highestRev. 5.00 Aug 08, 2006 page 232 of 982
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Section 8 DMA Controller (DMAC)
priority channel is activated. Transfer requests for other channels are held pending in the DMAC,
and activation is carried out in order of priority.
When DTE = 0 after completion of a transfer, an interrupt request from the selected activation
source is not sent to the DMAC, regardless of the DTA bit setting. In this case, the relevant
interrupt request is sent to the CPU or DTC.
When an interrupt request signal for DMAC activation is also used for an interrupt request to the
CPU or DTC activation (DTA = 0), the interrupt request flag is not cleared by the DMAC.
8.4.2
Activation by External Request
If an external request (DREQ pin) is specified as a DMAC activation source, the relevant port
should be set to input mode in advance. Level sensing or edge sensing can be used for external
requests.
External request operation in normal mode of short address mode or full address mode is
described below.
When edge sensing is selected, a byte or word is transferred each time a high-to-low transition is
detected on the DREQ pin. The next data transfer may not be performed if the next edge is input
before data transfer is completed.
When level sensing is selected, the DMAC stands by for a transfer request while the DREQ pin is
held high. While the DREQ pin is held low, transfers continue in succession, with the bus being
released each time a byte or word is transferred. If the DREQ pin goes high in the middle of a
transfer, the transfer is interrupted and the DMAC stands by for a transfer request.
8.4.3
Activation by Auto-Request
Auto-request is activated by register setting only, and transfer continues to the end. With autorequest activation, cycle steal mode or burst mode can be selected.
In cycle steal mode, the DMAC releases the bus to another bus master each time a byte or word is
transferred. DMA and CPU cycles are usually repeated alternately. In burst mode, the DMAC
keeps possession of the bus until the end of the transfer so that transfer is performed continuously.
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Section 8 DMA Controller (DMAC)
8.5
Operation
8.5.1
Transfer Modes
Table 8.4 lists the DMAC transfer modes.
Table 8.4
DMAC Transfer Modes
Transfer Mode
Short
address
mode
Transfer Source
Dual address mode
•
1-byte or 1-word transfer for a
single transfer request
•
Specify source and destination
addresses to transfer data in two
bus cycles.
(1) Sequential mode
•
•
Memory address incremented or
decremented by 1 or 2
•
•
(2) Idle mode
•
Memory address fixed
•
Number of transfers: 1 to 65,536
TPU channel 0 to •
5 compare
match/input
capture A interrupt •
SCI transmit-dataempty interrupt
•
SCI receive-datafull interrupt
•
A/D converter
conversion end
interrupt
•
External request
•
External request
Number of transfers: 1 to 65,536
(3) Repeat mode
•
Memory address incremented or
decremented by 1 or 2
•
Continues transfer after sending
number of transfers (1 to 256) and
restoring the initial value
Single address mode
•
1-byte or 1-word transfer for a
single transfer request
•
1-bus cycle transfer by means of
DACK pin instead of using
address for specifying I/O
•
Sequential mode, idle mode, or
repeat mode can be specified
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Remarks
•
Up to 4 channels
can operate
independently
External request
applies to channel
B only
Single address
mode applies to
channel B only
Section 8 DMA Controller (DMAC)
Transfer Mode
Transfer Source
Remarks
Full
address
mode
•
Auto-request
•
•
External request
•
TPU channel 0 to
5 compare
match/input
capture A interrupt
•
SCI transmit-dataempty interrupt
Normal mode
(1) Auto-request
•
Transfer request is internally held
•
Number of transfers (1 to 65,536)
is continuously sent
•
Burst/cycle steal transfer can be
selected
(2) External request
•
1-byte or 1-word transfer for a
single transfer request
•
Number of transfers: 1 to 65,536
Block transfer mode
•
Transfer of 1-block, size selected
for a single transfer request
•
Number of transfers: 1 to 65,536
•
Source or destination can be
selected as block area
•
Block size: 1 to 256 bytes or word •
Max. 2-channel
operation,
combining
channels A and B
SCI receive-datafull interrupt
•
A/D converter
conversion end
interrupt
•
External request
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Section 8 DMA Controller (DMAC)
8.5.2
Sequential Mode
Sequential mode can be specified by clearing the RPE bit in DMACR to 0. In sequential mode,
MAR is updated after each byte or word transfer in response to a single transfer request, and this is
executed the number of times specified in ETCR. One address is specified by MAR, and the other
by IOAR. The transfer direction can be specified by the DTDIR bit in DMACR.
Table 8.5 summarizes register functions in sequential mode.
Table 8.5
Register Functions in Sequential Mode
Function
Register
DTDIR = 0 DTDIR = 1 Initial Setting
23
0
Source
address
register
0
Destination Source
address
address
register
register
Start address of
Fixed
transfer source or
transfer destination
0
Transfer counter
Number of transfers Decremented every
transfer; transfer
ends when count
reaches H'0000
MAR
23
15
H'FF
IOAR
15
Operation
Destination Start address of
Incremented/
address
transfer destination decremented every
register
or transfer source
transfer
ETCR
MAR specifies the start address of the transfer source or transfer destination as 24 bits. MAR is
incremented or decremented by 1 or 2 each time a byte or word is transferred. IOAR specifies the
lower 16 bits of the other address. The 8 bits above IOAR have a value of H'FF.
Figure 8.3 illustrates operation in sequential mode.
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Section 8 DMA Controller (DMAC)
Address T
Transfer
IOAR
1 byte or word transfer performed in
response to 1 transfer request
Address B
Legend:
Address T = L
Address B = L + ( 1)DTID (2DTSZ (N
Where : L = Value set in MAR
N = Value set in ETCR
1))
Figure 8.3 Operation in Sequential Mode
The number of transfers is specified as 16 bits in ETCR. ETCR is decremented by 1 each time a
data transfer is executed, and when its value reaches H'0000, the DTE bit is cleared and data
transfer ends. If the DTIE bit is set to 1 at this time, an interrupt request is sent to the CPU or
DTC. The maximum number of transfers, when H'0000 is set in ETCR, is 65,536.
Transfer requests (activation sources) consist of A/D converter conversion end interrupts, external
requests, SCI transmit-data-empty and receive-data-full interrupts, and TPU channel 0 to 5
compare match/input capture A interrupts. External requests can only be specified for channel B.
Figure 8.4 shows an example of the setting procedure for sequential mode.
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Section 8 DMA Controller (DMAC)
[1]
Sequential mode setting
Set each bit in DMABCRH.
Clear the FAE bit to 0 to select short address
mode.
Specify enabling or disabling of internal
interrupt clearing with the DTA bit.
Set DMABCRH
[1]
[2]
Set the transfer source address and transfer
destination address in MAR and IOAR.
Set transfer source
and transfer destination
addresses
[2]
[3]
Set the number of transfers in ETCR.
[4]
Set each bit in DMACR.
Set the transfer data size with the DTSZ bit.
Specify whether MAR is to be incremented or
decremented with the DTID bit.
Clear the RPE bit to 0 to select sequential
Set number of transfers
[3]
mode.
Specify the transfer direction with the DTDIR
bit.
Select the activation source with bits DTF3 to
Set DMACR
DTF0.
[4]
[5]
Read the DTE bit in DMABCRL as 0.
[6] Set each bit in DMABCRL.
Specify enabling or disabling of transfer end
Read DMABCRL
[5]
interrupts with the DTIE bit.
Set the DTE bit to 1 to enable transfer.
Set DMABCRL
[6]
Sequential mode
Figure 8.4 Example of Sequential Mode Setting Procedure
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Section 8 DMA Controller (DMAC)
8.5.3
Idle Mode
Idle mode can be specified by setting the RPE bit in DMACR and DTIE bit in DMABCRL to 1. In
idle mode, one byte or word is transferred in response to a single transfer request, and this is
executed the number of times specified in ETCR. One address is specified by MAR, and the other
by IOAR. The transfer direction can be specified by the DTDIR bit in DMACR. Table 8.6
summarizes register functions in idle mode.
Table 8.6
Register Functions in Idle Mode
Function
Register
DTDIR = 0 DTDIR = 1 Initial Setting
23
Source
address
register
0
Destination Source
address
address
register
register
Start address of
Fixed
transfer source or
transfer destination
0
Transfer counter
Number of transfers Decremented every
transfer; transfer
ends when count
reaches H'0000
MAR
23
15
H'FF
IOAR
15
Operation
0
Destination Start address of
Fixed
address
transfer destination
register
or transfer source
ETCR
MAR specifies the start address of the transfer source or transfer destination as 24 bits. MAR is
neither incremented nor decremented by a data transfer. IOAR specifies the lower 16 bits of the
other address. The upper 8 bits of IOAR have a value of H'FF.
Figure 8.5 illustrates operation in idle mode.
MAR
Transfer
IOAR
1 byte or word transfer performed in
response to 1 transfer request
Figure 8.5 Operation in Idle Mode
The number of transfers is specified as 16 bits in ETCR. ETCR is decremented by 1 each time a
transfer is executed, and when its value reaches H'0000, the DTE bit is cleared and data transfer
ends. If the DTIE bit is set to 1 at this time, an interrupt request is sent to the CPU or DTC. The
maximum number of transfers, when H'0000 is set in ETCR, is 65,536.
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Section 8 DMA Controller (DMAC)
Transfer requests (activation sources) consist of A/D converter conversion end interrupts, external
requests, SCI transmit-data-empty and receive-data-full interrupts, and TPU channel 0 to 5
compare match/input capture A interrupts. External requests can only be specified for channel B.
Figure 8.6 shows an example of the setting procedure for idle mode.
[1]
Idle mode setting
Set each bit in DMABCRH.
Clear the FAE bit to 0 to select short address
mode.
Specify enabling or disabling of internal
interrupt clearing with the DTA bit.
Set DMABCRH
[1]
[2]
Set the transfer source address and transfer
destination address in MAR and IOAR.
Set transfer source
and transfer destination
addresses
[2]
[3]
Set the number of transfers in ETCR.
[4]
Set each bit in DMACR.
Set the transfer data size with the DTSZ bit.
Specify whether MAR is to be incremented or
decremented with the DTID bit.
Set the RPE bit to 1.
Set number of transfers
[3]
Specify the transfer direction with the DTDIR
bit.
Select the activation source with bits DTF3 to
DTF0.
Set DMACR
[4]
[5]
Read the DTE bit in DMABCRL as 0.
[6]
Set each bit in DMABCRL.
Set the DTIE bit to 1.
Set the DTE bit to 1 to enable transfer.
Read DMABCRL
[5]
Set DMABCRL
[6]
Idle mode
Figure 8.6 Example of Idle Mode Setting Procedure
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Section 8 DMA Controller (DMAC)
8.5.4
Repeat Mode
Repeat mode can be specified by setting the RPE bit in DMACR to 1, and clearing the DTIE bit in
DMABCRL to 0. In repeat mode, MAR is updated after each byte or word transfer in response to
a single transfer request, and this is executed the number of times specified in ETCRL. On
completion of the specified number of transfers, MAR and ETCRL are automatically restored to
their original settings and operation continues. One address is specified by MAR, and the other by
IOAR. The transfer direction can be specified by the DTDIR bit in DMACR. Table 8.7
summarizes register functions in repeat mode.
Table 8.7
Register Functions in Repeat Mode
Function
Register
DTDIR = 0 DTDIR = 1 Initial Setting
23
Source
address
register
0
Destination Source
address
address
register
register
Start address of
Fixed
transfer source or
transfer destination
0
Holds number of
transfers
Number of transfers Fixed
Transfer counter
Number of transfers Decremented every
transfer
Loaded with ETCRH
value when count
reaches H'00
MAR
23
15
H'FF
IOAR
7
ETCRH
7
0
ETCRL
Operation
0
Destination Start address of
Incremented/
address
transfer destination decremented every
register
or transfer source
transfer
Initial setting is
restored when value
reaches H'0000
MAR specifies the start address of the transfer source or transfer destination as 24 bits. MAR is
incremented or decremented by 1 or 2 each time a byte or word is transferred. IOAR specifies the
lower 16 bits of the other address. The upper 8 bits of IOAR have a value of H'FF. The number of
transfers is specified as 8 bits by ETCRH and ETCRL. The maximum number of transfers, when
H'00 is set in both ETCRH and ETCRL, is 256.
In repeat mode, ETCRL functions as the transfer counter, and ETCRH is used to hold the number
of transfers. ETCRL is decremented by 1 each time a data transfer is executed, and when its value
reaches H'00, it is loaded with the value in ETCRH. At the same time, the value set in MAR is
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Section 8 DMA Controller (DMAC)
restored in accordance with the values of the DTSZ and DTID bits in DMACR. The MAR
restoration operation is as shown below.
MAR = MAR – (–1)DTID · 2DTSZ · ETCRH
The same value should be set in ETCRH and ETCRL.
In repeat mode, operation continues until the DTE bit in DMABCRL is cleared. To end the
transfer operation, therefore, the DTE bit should be cleared to 0. A transfer end interrupt request is
not sent to the CPU or DTC. By setting the DTE bit to 1 again after it has been cleared, the
operation can be restarted from the transfer after that terminated when the DTE bit was cleared.
Figure 8.7 illustrates operation in repeat mode.
Transfer
Address T
IOAR
1 byte or word transfer performed in
response to 1 transfer request
Legend:
Address
Address
Where :
Address B
T=L
B = L + ( 1)DTID (2DTSZ (N
L = Value set in MAR
N = Value set in ETCR
Figure 8.7 Operation in Repeat mode
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1))
Section 8 DMA Controller (DMAC)
Transfer requests (activation sources) consist of A/D converter conversion end interrupts, external
requests, SCI transmit-data-empty and receive-data-full interrupts, and TPU channel 0 to 5
compare match/input capture A interrupts. External requests can only be specified for channel B.
Figure 8.8 shows an example of the setting procedure for repeat mode.
[1]
Repeat mode setting
Set each bit in DMABCRH.
Clear the FAE bit to 0 to select short address
mode.
Specify enabling or disabling of internal
interrupt clearing with the DTA bit.
Set DMABCRH
[1]
[2]
Set the transfer source address and transfer
destination address in MAR and IOAR.
[3]
Set transfer source
and transfer destination
addresses
Set the number of transfers in both ETCRH and
ETCRL.
[2]
[4]
Set each bit in DMACR.
Set the transfer data size with the DTSZ bit.
Specify whether MAR is to be incremented or
decremented with the DTID bit.
Set number of transfers
[3]
Set the RPE bit to 1.
Specify the transfer direction with the DTDIR
bit.
Select the activation source with bits DTF3 to
Set DMACR
DTF0.
[4]
[5]
Read the DTE bit in DMABCRL as 0.
[6]
Set each bit in DMABCRL.
Clear the DTIE bit to 0.
Read DMABCRL
[5]
Set DMABCRL
[6]
Set the DTE bit to 1 to enable transfer.
Repeat mode
Figure 8.8 Example of Repeat Mode Setting Procedure
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Section 8 DMA Controller (DMAC)
8.5.5
Single Address Mode
DMAC supports the dual address mode, in which two different cycles are used for reading and
writing, and the single address mode, in which a single cycle is used for both reading and writing.
In dual address mode, the source address and the destination address are specified respectively for
transferring data.
In single address mode, data is transferred between the external space, in which the transfer source
or transfer destination is specified by the address, and the external device that is selected by
DACK strobe regardless of the address. Figure 8.9 shows the data bus in single address mode.
RD
HWR, LWR
A23 to A0
Address bus
(Read)
External
memory
D15 to D0
(High impedance)
DACK
Data bus
(Write)
This LSI
External
device
Figure 8.9 Data Bus in Single Address Mode
When the data bus is used for reading in single address mode, data is transferred from the external
memory to the external device and the DACK pin functions as the write strobe for the external
device. When the data bus is used for writing in single address mode, data is transferred from the
external device to the external memory and the DACK pin functions as the read strobe for the
external device. Since the direction for the external device cannot be controlled, chose one of
directions described above.
The setting of the bus controller for the external memory area controls the bus cycle in single
address mode. To the external device, DACK is output in synchronization with the address strobe.
For details on the bus cycle, see section 8.5.10, DMA Transfer (Single Address Mode) Bus
Cycles.
In single address mode, do not specify the internal area for the transfer address.
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Section 8 DMA Controller (DMAC)
Single address mode can only be specified for channel B. This mode can be specified by setting
the SAE bit in DMABCRH to 1 in short address mode.
One address is specified by MAR, and the other is set automatically to the data transfer
acknowledge pin (DACK). The transfer direction can be specified by the DTDIR bit in DMACR.
Table 8.8 summarizes register functions in single address mode.
Table 8.8
Register Functions in Single Address Mode
Function
Register
DTDIR = 0 DTDIR = 1 Initial Setting
23
0
MAR
DACK pin
15
0
ETCR
Operation
Source
address
register
Destination Start address of
See sections 8.5.2,
address
transfer destination Sequential Mode,
register
or transfer source
8.5.3, Idle Mode,
and 8.5.4, Repeat
Mode.
Write
strobe
Read
strobe
Transfer counter
(Set automatically Strobe for external
by SAE bit; IOAR is device
invalid)
Number of transfers See sections 8.5.2,
Sequential Mode,
8.5.3, Idle Mode,
and 8.5.4, Repeat
Mode.
MAR specifies the start address of the transfer source or transfer destination as 24 bits. IOAR is
invalid; in its place the strobe for external devices (DACK) is output.
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Section 8 DMA Controller (DMAC)
Figure 8.10 illustrates operation in single address mode (when sequential mode is specified).
Address T
DACK
Transfer
1 byte or word transfer performed in
response to 1 transfer request
Legend:
Address
Address
Where :
Address B
T
B
L
N
=L
= L + ( 1)DTID (2DTSZ (N
= Value set in MAR
= Value set in ETCR
1))
Figure 8.10 Operation in Single Address Mode (when Sequential Mode Is Specified)
Figure 8.11 shows an example of the setting procedure for single address mode (when sequential
mode is specified).
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Section 8 DMA Controller (DMAC)
[1]
Single address
mode setting
Set each bit in DMABCRH.
Clear the FAE bit to 0 to select short address
mode.
Set the SAE bit to 1 to select single address
mode.
Set DMABCRH
Specify enabling or disabling of internal
[1]
interrupt clearing with the DTA bit.
[2]
destination address in MAR.
Set transfer source and
transfer destination
addresses
Set the transfer source address/transfer
[2]
[3]
Set the number of transfers in ETCR.
[4]
Set each bit in DMACR.
Set the transfer data size with the DTSZ bit.
Specify whether MAR is to be incremented or
Set number of transfers
[3]
decremented with the DTID bit.
Clear the RPE bit to 0 to select sequential
mode.
Specify the transfer direction with the DTDIR
Set DMACR
bit.
[4]
Select the activation source with bits DTF3 to
DTF0.
Read DMABCRL
[5]
[5]
Read the DTE bit in DMABCRL as 0.
[6]
Set each bit in DMABCRL.
Specify enabling or disabling of transfer end
interrupts with the DTIE bit.
Set the DTE bit to 1 to enable transfer.
Set DMABCRL
[6]
Single address mode
Figure 8.11 Example of Single Address Mode Setting Procedure
(when Sequential Mode Is Specified)
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Section 8 DMA Controller (DMAC)
8.5.6
Normal Mode
In normal mode, transfer is performed with channels A and B used in combination. Normal mode
can be specified by setting the FAE bit in DMABCRH to 1 and clearing the BLKE bit in
DMACRA to 0. In normal mode, MAR is updated after data transfer of a byte or word in response
to a single transfer request, and this is executed the number of times specified in ETCRA. The
transfer source is specified by MARA, and the transfer destination by MARB. Table 8.9
summarizes register functions in normal mode.
Table 8.9
Register Functions in Normal Mode
Register
23
Function
Initial Setting
Operation
0
Source address
register
Start address of
transfer source
Incremented/decremented
every transfer, or fixed
0
Destination
address register
Start address of
Incremented/decremented
transfer destination every transfer, or fixed
0
Transfer counter Number of transfers Decremented every
transfer; transfer ends
when count reaches
H'0000
MARA
23
MARB
15
ETCRA
MARA and MARB specify the start addresses of the transfer source and transfer destination,
respectively, as 24 bits. MAR can be incremented or decremented by 1 or 2 each time a byte or
word is transferred, or can be fixed. Incrementing, decrementing, or holding a fixed value can be
set separately for MARA and MARB.
The number of transfers is specified by ETCRA as 16 bits. ETCRA is decremented by 1 each time
a transfer is performed, and when its value reaches H'0000 the DTE bit in DMABCRL is cleared
and transfer ends. If the DTIE bit in DMABCRL is set to 1 at this time, an interrupt request is sent
to the CPU or DTC. The maximum number of transfers, when H'0000 is set in ETCRA, is 65,536.
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Section 8 DMA Controller (DMAC)
Figure 8.12 illustrates operation in normal mode.
Transfer
Address TA
Address TB
Address BB
Address BA
Legend:
Address
Address
Address
Address
Where :
TA
TB
BA
BB
LA
LB
N
= LA
= LB
= LA + SAIDE ( 1)SAID (2DTSZ (N
= LB + DAIDE ( 1)DAID (2DTSZ (N
= Value set in MARA
= Value set in MARB
= Value set in ETCRA
1))
1))
Figure 8.12 Operation in Normal Mode
Transfer requests (activation sources) are external requests and auto-requests. With auto-request,
the DMAC is only activated by register setting, and the specified number of transfers are
performed automatically. With auto-request, cycle steal mode or burst mode can be selected. In
cycle steal mode, the bus is released to another bus master each time a transfer is performed. In
burst mode, the bus is held continuously until transfer ends.
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Section 8 DMA Controller (DMAC)
Figure 8.13 shows an example of the setting procedure for normal mode.
[1]
Normal mode setting
Set each bit in DMABCRH.
Set the FAE bit to 1 to select full address
mode.
Specify enabling or disabling of internal
interrupt clearing with the DTA bit.
Set DMABCRH
[1]
[2]
Set the transfer source address in MARA, and
the transfer destination address in MARB.
Set transfer source and
transfer destination
addresses
[2]
[3]
Set the number of transfers in ETCRA.
[4]
Set each bit in DMACRA and DMACRB.
Set the transfer data size with the DTSZ bit.
Specify whether MARA is to be incremented,
decremented, or fixed, with the SAID and
SAIDE bits.
Set number of transfers
[3]
Clear the BLKE bit to 0 to select normal
mode.
Specify whether MARB is to be incremented,
decremented, or fixed, with the DAID and
Set DMACR
DAIDE bits.
[4]
Select the activation source with bits DTF3 to
DTF0.
Read DMABCRL
[5]
[5]
Read DTE = 0 and DTME = 0 in DMABCRL.
[6]
Set each bit in DMABCRL.
Specify enabling or disabling of transfer end
interrupts with the DTIE bit.
Set both the DTME bit and the DTE bit to 1 to
Set DMABCRL
[6]
enable transfer.
Normal mode
Figure 8.13 Example of Normal Mode Setting Procedure
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Section 8 DMA Controller (DMAC)
8.5.7
Block Transfer Mode
In block transfer mode, data transfer is performed with channels A and B used in combination.
Block transfer mode can be specified by setting the FAE bit in DMABCRH and the BLKE bit in
DMACRA to 1. In block transfer mode, a data transfer of the specified block size is carried out in
response to a single transfer request, and this is executed for the number of times specified in
ETCRB. The transfer source is specified by MARA, and the transfer destination by MARB. Either
the transfer source or the transfer destination can be selected as a block area (an area composed of
a number of bytes or words). Table 8.10 summarizes register functions in block transfer mode.
Table 8.10 Register Functions in Block Transfer Mode
Register
23
Function
Initial Setting
Operation
0
Source address
register
Start address of
transfer source
Incremented/decremented
every transfer, or fixed
0
Destination
address register
Start address of
Incremented/decremented
transfer destination every transfer, or fixed
0
Holds block
size
Block size
Fixed
Block size
counter
Block size
Decremented every
transfer; ETCRH value
copied when count
reaches H'00
Block transfer
counter
Number of block
transfers
Decremented every block
transfer; transfer ends
when count reaches
H'0000
MARA
23
MARB
7
ETCRAH
7
0
ETCRAL
15
0
ETCRB
MARA and MARB specify the start addresses of the transfer source and transfer destination,
respectively, as 24 bits. MAR can be incremented or decremented by 1 or 2 each time a byte or
word is transferred, or can be fixed. Incrementing, decrementing, or holding a fixed value can be
set separately for MARA and MARB. Whether a block is to be designated for MARA or for
MARB is specified by the BLKDIR bit in DMACRA.
To specify the number of transfers, if M is the size of one block (where M = 1 to 256) and N
transfers are to be performed (where N = 1 to 65,536), M is set in both ETCRAH and ETCRAL,
and N in ETCRB.
Figure 8.14 illustrates operation in block transfer mode when MARB is designated as a block area.
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Section 8 DMA Controller (DMAC)
Address TB
Address TA
1st block
2nd block
Transfer
Block area
Consecutive transfer
of M bytes or words
is performed in
response to one
request
Nth block
Address BA
Legend:
Address
Address
Address
Address
Where :
TA
TB
BA
BB
LA
LB
N
M
= LA
= LB
= LA + SAIDE ( 1)SAID (2DTSZ (M N 1))
= LB + DAIDE ( 1)DAID (2DTSZ (N 1))
= Value set in MARA
= Value set in MARB
= Value set in ETCRB
= Value set in ETCRAH and ETCRAL
Figure 8.14 Operation in Block Transfer Mode (BLKDIR = 0)
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Address BB
Section 8 DMA Controller (DMAC)
Figure 8.15 illustrates operation in block transfer mode when MARA is designated as a block area.
Address TA
Address TB
Block area
1st block
Transfer
Consecutive transfer
of M bytes or words
is performed in
response to one
request
Address BA
2nd block
Nth block
Address BB
Legend:
Address
Address
Address
Address
Where :
TA
TB
BA
BB
LA
LB
N
M
= LA
= LB
= LA + SAIDE ( 1)SAID (2DTSZ (N 1))
= LB + DAIDE ( 1)DAID (2DTSZ (M N 1))
= Value set in MARA
= Value set in MARB
= Value set in ETCRB
= Value set in ETCRAH and ETCRAL
Figure 8.15 Operation in Block Transfer Mode (BLKDIR = 1)
ETCRAL is decremented by 1 each time a byte or word transfer is performed. In response to a
single transfer request, burst transfer is performed until the value in ETCRAL reaches H'00.
ETCRAL is then loaded with the value in ETCRAH. At this time, the value in the MAR register
for which a block designation has been given by the BLKDIR bit in DMACRA is restored in
accordance with the DTSZ, SAID/DAID, and SAIDE/DAIDE bits in DMACR.
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Section 8 DMA Controller (DMAC)
ETCRB is decremented by 1 after every block transfer, and when the count reaches H'0000 the
DTE bit in DMABCRL is cleared and transfer ends. If the DTIE bit in DMABCRL is set to 1 at
this point, an interrupt request is sent to the CPU or DTC.
Figure 8.16 shows the operation flow in block transfer mode.
Start
(DTE = DTME = 1)
No
Transfer request?
Yes
Acquire bus
Read address specified by MARA
MARA = MARA + SAIDE ( 1)SAID 2DTSZ
Write to address specified by MARB
MARB = MARB + DAIDE ( 1)DAID 2DTSZ
ETCRAL = ETCRAL
1
No
ETCRAL = H'00
Yes
Release bus
ETCRAL = ETCRAH
No
BLKDIR = 0
Yes
MARB = MARB
DAIDE ( 1)DAID 2DTSZ ETCRAH
MARA = MARA
SAIDE ( 1)SAID
ETCRB = ETCRB
No
2DTSZ
ETCRAH
1
ETCRB = H'0000
Yes
Clear DTE bit to 0
to end transfer
Figure 8.16 Operation Flow in Block Transfer Mode
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Section 8 DMA Controller (DMAC)
Transfer requests (activation sources) consist of A/D converter conversion end interrupts, external
requests, SCI transmit-data-empty and receive-data-full interrupts, and TPU channel 0 to 5
compare match/input capture A interrupts.
Figure 8.17 shows an example of the setting procedure for block transfer mode.
[1]
Block transfer
mode setting
Set each bit in DMABCRH.
Set the FAE bit to 1 to select full address
mode.
Specify enabling or disabling of internal
interrupt clearing with the DTA bit.
Set DMABCRH
[1]
[2]
Set the transfer source address in MARA, and
the transfer destination address in MARB.
[3]
Set transfer source
and transfer destination
addresses
Set the block size in both ETCRAH and
ETCRAL. Set the number of transfers in
[2]
ETCRB.
[4]
Set each bit in DMACRA and DMACRB.
Set the transfer data size with the DTSZ bit.
Specify whether MARA is to be incremented,
Set number of transfers
[3]
decremented, or fixed, with the SAID and
SAIDE bits.
Set the BLKE bit to 1 to select block transfer
mode.
Set DMACR
Specify whether the transfer source or the
[4]
transfer destination is a block area with the
BLKDIR bit.
Specify whether MARB is to be incremented,
decremented, or fixed, with the DAID and
Read DMABCRL
DAIDE bits.
[5]
Select the activation source with bits DTF3 to
DTF0.
Set DMABCRL
[6]
[5]
Read DTE = 0 and DTME = 0 in DMABCRL.
[6]
Set each bit in DMABCRL.
Specify enabling or disabling of transfer end
interrupts to the CPU with the DTIE bit.
Set both the DTME bit and the DTE bit to 1 to
Block transfer mode
enable transfer.
Figure 8.17 Example of Block Transfer Mode Setting Procedure
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Section 8 DMA Controller (DMAC)
8.5.8
Basic Bus Cycles
An example of the basic DMAC bus cycle timing is shown in figure 8.18. In this example, wordsize transfer is performed from 16-bit, 2-state access space to 8-bit, 3-state access space. When
the bus is transferred from the CPU to the DMAC, a source address read and destination address
write are performed. The bus is not released in response to another bus request, etc., between
these read and write operations. As like CPU cycles, DMA cycles conform to the bus controller
settings.
The address is not output to the external address bus in an access to on-chip memory or an internal
I/O register.
CPU cycle
DMAC cycle (1-word transfer)
T1
T2
T1
T2
T3
T1
T2
CPU cycle
T3
φ
Source
address
Destination address
Address bus
RD
HWR
LWR
Figure 8.18 Example of DMA Transfer Bus Timing
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Section 8 DMA Controller (DMAC)
8.5.9
DMA Transfer (Dual Address Mode) Bus Cycles
Short Address Mode: Figure 8.19 shows a transfer example in which TEND output is enabled
and byte-size short address mode transfer (sequential/idle/repeat mode) is performed from external
8-bit, 2-state access space to internal I/O space.
DMA
read
DMA
write
DMA
read
DMA
write
DMA
read
DMA
write
DMA
dead
φ
Address bus
RD
HWR
LWR
TEND
Bus release
Bus release
Bus release
Last transfer
cycle
Bus
release
Figure 8.19 Example of Short Address Mode Transfer
A byte or word transfer is performed for a single transfer request, and after the transfer, the bus is
released. While the bus is released, one or more bus cycles are executed by the CPU or DTC.
In the transfer end cycle (the cycle in which the transfer counter reaches 0), a one-state DMA dead
cycle is inserted after the DMA write cycle.
In repeat mode, when TEND output is enabled, TEND output goes low in the transfer end cycle.
Full Address Mode (Cycle Steal Mode): Figure 8.20 shows a transfer example in which TEND
output is enabled and word-size full address mode transfer (cycle steal mode) is performed from
external 16-bit, 2-state access space to external 16-bit, 2-state access space.
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Section 8 DMA Controller (DMAC)
DMA
read
DMA
write
DMA
read
DMA
write
DMA
read
DMA
write
DMA
dead
φ
Address bus
RD
HWR
LWR
TEND
Bus release
Bus release
Bus release
Last transfer
cycle
Bus
release
Figure 8.20 Example of Full Address Mode Transfer (Cycle Steal)
A byte or word transfer is performed for a single transfer request, and after the transfer, the bus is
released. While the bus is released, one bus cycle is executed by the CPU or DTC.
In the transfer end cycle (the cycle in which the transfer counter reaches 0), a one-state DMA dead
cycle is inserted after the DMA write cycle.
Full Address Mode (Burst Mode): Figure 8.21 shows a transfer example in which TEND output
is enabled and word-size full address mode transfer (burst mode) is performed from external 16bit, 2-state access space to external 16-bit, 2-state access space.
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Section 8 DMA Controller (DMAC)
DMA
read
DMA
write
DMA
read
DMA
write
DMA
read
DMA
write
DMA
dead
φ
Address bus
RD
HWR
LWR
TEND
Last transfer cycle
Bus release
Bus release
Burst transfer
Figure 8.21 Example of Full Address Mode Transfer (Burst Mode)
In burst mode, one-byte or one-word transfers are executed consecutively until transfer ends.
In the transfer end cycle (the cycle in which the transfer counter reaches 0), a one-state DMA dead
cycle is inserted after the DMA write cycle.
If a request from another higher-priority channel is generated after burst transfer starts, that
channel has to wait until the burst transfer ends.
If an NMI interrupt is generated while a channel designated for burst transfer is in the transfer
enabled state, the DTME bit in DMABCRL is cleared and the channel is placed in the transfer
disabled state. If burst transfer has already been activated inside the DMAC, the bus is released on
completion of a one-byte or one-word transfer within the burst transfer, and burst transfer is
suspended. If the last transfer cycle of the burst transfer has already been activated inside the
DMAC, execution continues to the end of the transfer even if the DTME bit is cleared.
Full Address Mode (Block Transfer Mode): Figure 8.22 shows a transfer example in which
TEND output is enabled and word-size full address mode transfer (block transfer mode) is
performed from internal 16-bit, 1-state access space to external 16-bit, 2-state access space.
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Section 8 DMA Controller (DMAC)
DMA
read
DMA
write
DMA
read
DMA
write
DMA
dead
DMA
read
DMA
write
DMA
read
DMA
write
DMA
dead
φ
Address bus
RD
HWR
LWR
TEND
Bus release
Block transfer
Bus release
Last block transfer
Bus
release
Figure 8.22 Example of Full Address Mode Transfer (Block Transfer Mode)
A one-block transfer is performed for a single transfer request, and after the transfer the bus is
released. While the bus is released, one or more bus cycles are executed by the CPU or DTC.
In the transfer end cycle of each block (the cycle in which the transfer counter reaches 0), a onestate DMA dead cycle is inserted after the DMA write cycle. Even if an NMI interrupt is generated
during data transfer, block transfer operation is not affected until data transfer for one block has
ended.
DREQ Pin Falling Edge Activation Timing: Set the DTA bit in DMABCRH to 1 for the channel
for which the DREQ pin is selected.
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Section 8 DMA Controller (DMAC)
Figure 8.23 shows an example of normal mode transfer activated by the DREQ pin falling edge.
DMA
read
Bus release
DMA
write
Bus
release
DMA
read
DMA
write
Bus
release
Transfer source
Transfer destination
φ
DREQ
Address
bus
DMA
control
Channel
Transfer source Transfer destination
Idle
Read
Write
Idle
Read
Request clear period
Request
[1]
[2]
Idle
Request clear period
Request
Minimum
of 2 cycles
Write
Minimum
of 2 cycles
[3]
[4]
[5]
Acceptance resumes
[6]
[7]
Acceptance resumes
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] Start of DMA cycle; DREQ pin high level sampling on the rising edge of φ starts.
[4] [7] When the DREQ pin high level has been sampled, acceptance is resumed after the write cycle
is completed.
(As in [1], the DREQ pin low level is sampled on the rising edge of φ, and the request is held.)
[1]
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
Figure 8.23 Example of DREQ Pin Falling Edge Activated Normal Mode Transfer
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
When the DREQ pin low level is sampled while acceptance by means of the DREQ pin is
possible, the request is held in the DMAC. Then, when activation is initiated in the DMAC, the
request is cleared, and DREQ pin high level sampling for edge detection is started. If DREQ pin
high level sampling has been completed by the time the DMA write cycle ends, acceptance
resumes after the end of the write cycle, DREQ pin low level sampling is performed again, and
this operation is repeated until the transfer ends.
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Section 8 DMA Controller (DMAC)
Figure 8.24 shows an example of block transfer mode transfer activated by the DREQ pin falling
edge.
1 block transfer
1 block transfer
DMA
read
Bus release
DMA
write
DMA Bus
dead release
DMA
read
DMA
write
DMA
dead
Bus
release
φ
DREQ
Address
bus
DMA
control
Channel
Transfer source
Read
Idle
Request
Transfer destination
Dead
Write
Request clear period
Idle
[2]
Read
Write
Transfer destination
Dead
Idle
Request clear period
Request
Minimum
of 2 cycles
[1]
Transfer source
Minimum
of 2 cycles
[3]
[4]
[5]
[6]
Acceptance resumes
[7]
Acceptance resumes
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] Start of DMA cycle; DREQ pin high level sampling on the rising edge of φ starts.
[4] [7] When the DREQ pin high level has been sampled, acceptance is resumed after the dead cycle
is completed.
(As in [1], the DREQ pin low level is sampled on the rising edge of φ, and the request is held.)
[1]
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
Figure 8.24 Example of DREQ Pin Falling Edge Activated Block Transfer Mode Transfer
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
When the DREQ pin low level is sampled while acceptance by means of the DREQ pin is
possible, the request is held in the DMAC. Then, when activation is initiated in the DMAC, the
request is cleared, and DREQ pin high level sampling for edge detection is started. If DREQ pin
high level sampling has been completed by the time the DMA dead cycle ends, acceptance
resumes after the end of the dead cycle, DREQ pin low level sampling is performed again, and this
operation is repeated until the transfer ends.
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Section 8 DMA Controller (DMAC)
DREQ Pin Low Level Activation Timing (Normal Mode): Set the DTA bit in DMABCRH to 1
for the channel for which the DREQ pin is selected.
Figure 8.25 shows an example of normal mode transfer activated by the DREQ pin low level.
DMA
read
DMA
write
Transfer source
Transfer destination
Bus
release
DMA
read
DMA
write
Transfer source
Transfer destination
Bus
release
Bus
release
φ
DREQ
Address
bus
DMA
control
Idle
Read
Channel
Request
Write
Idle
Read
Request clear period
[1]
[2]
Idle
Request clear period
Request
Minimum
of 2 cycles
Write
Minimum
of 2 cycles
[3]
[4]
[5]
Acceptance resumes
[6]
[7]
Acceptance resumes
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] The DMA cycle is started.
[4] [7] Acceptance is resumed after the write cycle is completed.
(As in [1], the DREQ pin low level is sampled on the rising edge of φ, and the request is held.)
[1]
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
Figure 8.25 Example of DREQ Pin Low Level Activated Normal Mode Transfer
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
When the DREQ pin low level is sampled while acceptance by means of the DREQ pin is
possible, the request is held in the DMAC. Then, when activation is initiated in the DMAC, the
request is cleared. After the end of the write cycle, acceptance resumes, DREQ pin low level
sampling is performed again, and this operation is repeated until the transfer ends.
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Section 8 DMA Controller (DMAC)
Figure 8.26 shows an example of block transfer mode transfer activated by DREQ pin low level.
1 block transfer
DMA
read
Bus release
1 block transfer
DMA
write
DMA
Bus
dead release
DMA
read
DMA
write
DMA
dead
Bus
release
φ
DREQ
Address
bus
DMA
control
Channel
Transfer source
Idle
Read
Dead
Write
Request clear period
Request
Idle
[2]
Read
Write
Transfer destination
Dead
Idle
Request clear period
Request
Minimum
of 2 cycles
[1]
Transfer source
Transfer destination
Minimum
of 2 cycles
[3]
[4]
[5]
[6]
Acceptance resumes
[7]
Acceptance resumes
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] The DMA cycle is started.
[4] [7] Acceptance is resumed after the dead cycle is completed.
(As in [1], the DREQ pin low level is sampled on the rising edge of φ, and the request is held.)
[1]
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
Figure 8.26 Example of DREQ Pin Low Level Activated Block Transfer Mode Transfer
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
When the DREQ pin low level is sampled while acceptance by means of the DREQ pin is
possible, the request is held in the DMAC. Then, when activation is initiated in the DMAC, the
request is cleared. After the end of the dead cycle, acceptance resumes, DREQ pin low level
sampling is performed again, and this operation is repeated until the transfer ends.
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Section 8 DMA Controller (DMAC)
8.5.10
DMA Transfer (Single Address Mode) Bus Cycles
Single Address Mode (Read): Figure 8.27 shows a transfer example in which TEND output is
enabled and byte-size single address mode transfer (read) is performed from external 8-bit, 2-state
access space to an external device.
DMA read
DMA read
DMA read
DMA
DMA read dead
φ
Address bus
RD
DACK
TEND
Bus
release
Bus
release
Bus
release
Bus Last transfer
release
cycle
Bus
release
Figure 8.27 Example of Single Address Mode Transfer (Byte Read)
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Section 8 DMA Controller (DMAC)
Figure 8.28 shows a transfer example in which TEND output is enabled and word-size single
address mode transfer (read) is performed from external 8-bit, 2-state access space to an external
device.
DMA read
DMA read
DMA read
DMA
dead
φ
Address bus
RD
DACK
TEND
Bus
release
Bus
release
Bus
release
Last transfer
cycle
Bus
release
Figure 8.28 Example of Single Address Mode (Word Read) Transfer
A byte or word transfer is performed for a single transfer request, and after the transfer, the bus is
released. While the bus is released, one or more bus cycles are executed by the CPU or DTC.
In the transfer end cycle (the cycle in which the transfer counter reaches 0), a one-state DMA dead
cycle is inserted after the DMA write cycle.
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Section 8 DMA Controller (DMAC)
Single Address Mode (Write): Figure 8.29 shows a transfer example in which TEND output is
enabled and byte-size single address mode transfer (write) is performed from an external device to
external 8-bit, 2-state access space.
DMA write
DMA write
DMA write
DMA
DMA write dead
φ
Address bus
HWR
LWR
DACK
TEND
Bus
release
Bus
release
Bus
release
Bus Last transfer
release
cycle
Bus
release
Figure 8.29 Example of Single Address Mode Transfer (Byte Write)
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Section 8 DMA Controller (DMAC)
Figure 8.30 shows a transfer example in which TEND output is enabled and word-size single
address mode transfer (write) is performed from an external device to external 8-bit, 2-state access
space.
DMA write
DMA write
DMA write
DMA
dead
φ
Address bus
HWR
LWR
DACK
TEND
Bus
release
Bus
release
Bus
release
Last transfer
cycle
Bus
release
Figure 8.30 Example of Single Address Mode Transfer (Word Write)
A byte or word transfer is performed for a single transfer request, and after the transfer, the bus is
released. While the bus is released, one or more bus cycles are executed by the CPU or DTC.
In the transfer end cycle (the cycle in which the transfer counter reaches 0), a one-state DMA dead
cycle is inserted after the DMA write cycle.
DREQ Pin Falling Edge Activation Timing: Set the DTA bit in DMABCRH to 1 for the channel
for which the DREQ pin is selected.
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Section 8 DMA Controller (DMAC)
Figure 8.31 shows an example of single address mode transfer activated by the DREQ pin falling
edge.
Bus release
DMA single
Bus release
DMA single
Bus release
φ
DREQ
Transfer source/
destination
Address bus
Transfer source/
destination
DACK
DMA control
Channel
Single
Idle
Request
Single
Idle
Request clear
period
[1]
[2]
Request clear
period
Request
Minimum of
2 cycles
Idle
Minimum of
2 cycles
[3]
[4]
[5]
Acceptance resumes
[6]
[7]
Acceptance resumes
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] Start of DMA cycle; DREQ pin high level sampling on the rising edge of φ starts.
[4] [7] When the DREQ pin high level has been sampled, acceptance is resumed after the single
cycle is completed. (As in [1], the DREQ pin low level is sampled on the rising edge of φ, and
the request is held.)
[1]
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
Figure 8.31 Example of DREQ Pin Falling Edge Activated Single Address Mode Transfer
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
When the DREQ pin low level is sampled while acceptance by means of the DREQ pin is
possible, the request is held in the DMAC. Then, when activation is initiated in the DMAC, the
request is cleared, and DREQ pin high level sampling for edge detection is started. If DREQ pin
high level sampling has been completed by the time the DMA single cycle ends, acceptance
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Section 8 DMA Controller (DMAC)
resumes after the end of the single cycle, DREQ pin low level sampling is performed again, and
this operation is repeated until the transfer ends.
DREQ Pin Low Level Activation Timing: Set the DTA bit in DMABCRH to 1 for the channel
for which the DREQ pin is selected.
Figure 8.32 shows an example of single address mode transfer activated by the DREQ pin low
level.
Bus release
DMA single
Bus release
Bus
release
DMA single
φ
DREQ
Transfer source/
destination
Address bus
Transfer source/
destination
DACK
DMA control
Single
Idle
Channel
Single
Idle
Request clear
period
Request
[1]
[2]
Request clear
period
Request
Minimum of
2 cycles
Idle
Minimum of
2 cycles
[3]
[4]
[5]
Acceptance resumes
[6]
[7]
Acceptance resumes
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] The DMAC cycle is started.
[4] [7] Acceptance is resumed after the single cycle is completed.
(As in [1], the DREQ pin low level is sampled on the rising edge of φ, and the request is held.)
[1]
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
Figure 8.32 Example of DREQ Pin Low Level Activated Single Address Mode Transfer
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Section 8 DMA Controller (DMAC)
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
When the DREQ pin low level is sampled while acceptance by means of the DREQ pin is
possible, the request is held in the DMAC. Then, when activation is initiated in the DMAC, the
request is cleared. After the end of the single cycle, acceptance resumes, DREQ pin low level
sampling is performed again, and this operation is repeated until the transfer ends.
8.5.11
Multi-Channel Operation
The DMAC channel priority order is: channel 0 > channel 1, and channel A > channel B. Table
8.11 summarizes the priority order for DMAC channels.
Table 8.11 DMAC Channel Priority Order
Short Address Mode
Full Address Mode
Priority
Channel 0A
Channel 0
High
Channel 0B
Channel 1A
Channel 1B
Channel 1
Low
If transfer requests are issued simultaneously for more than one channel, or if a transfer request for
another channel is issued during a transfer, when the bus is released, the DMAC selects the
highest-priority channel from among those issuing a request according to the priority order shown
in table 8.11. During burst transfer, or when one block is being transferred in block transfer, the
channel will not be changed until the end of the transfer. Figure 8.33 shows a transfer example in
which transfer requests are issued simultaneously for channels 0A, 0B, and 1.
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Section 8 DMA Controller (DMAC)
DMA read
DMA write
DMA read
DMA write
DMA read
DMA
DMA write read
φ
Address bus
RD
HWR
LWR
DMA control Idle Read
Channel 0A
Idle
Write
Read
Write
Idle
Read
Write
Read
Request clear
Channel 0B
Request
hold
Selection
Channel 1
Request
hold
Nonselection
Bus
release
Channel 0A
transfer
Request clear
Request
hold
Bus
release
Selection
Channel 0B
transfer
Request clear
Bus
release
Channel 1 transfer
Figure 8.33 Example of Multi-Channel Transfer
8.5.12
Relation between DMAC and External Bus Requests, and DTC
The DMA read cycle and write cycle are inseparable, and so the external bus release cycle and
DTC cycle do not arise between the DMA external read cycle and internal write cycle.
When the read cycle and write cycle are set in series as in a burst transfer or block transfer, the
external bus release may be inserted after the write cycle. As the DTC has a lower priority than the
DMAC, it is not executed until the DMAC releases the bus.
When the DMA read cycle or write cycle accesses the on-chip memory or an internal I/O register,
the DMAC cycle or external bus release may be executed at the same time.
8.5.13
DMAC and NMI Interrupts
When an NMI interrupt is requested, burst mode transfer in full address mode is interrupted. An
NMI interrupt does not affect the operation of the DMAC in other modes.
In full address mode, transfer is enabled for a channel when both the DTE bit and DTME bit are
set to 1. With burst mode setting, the DTME bit is cleared when an NMI interrupt is requested.
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Section 8 DMA Controller (DMAC)
If the DTME bit is cleared during burst mode transfer, the DMAC discontinues transfer on
completion of the 1-byte or 1-word transfer in progress, then releases the bus, which passes to the
CPU.
The channel on which transfer was interrupted can be restarted by setting the DTME bit to 1 again.
Figure 8.34 shows the procedure for continuing transfer when it has been interrupted by an NMI
interrupt on a channel designated for burst mode transfer.
[1]
Resumption of
transfer on interrupted
channel
DTE = 1
DTME = 0
[2]
Check that DTE = 1 and
DTME = 0 in DMABCRL.
Write 1 to the DTME bit.
[1]
No
Yes
Set DTME bit to 1
Transfer continues
[2]
Transfer ends
Figure 8.34 Example of Procedure for Continuing Transfer on Channel Interrupted by
NMI Interrupt
8.5.14
Forced Termination of DMAC Operation
If the DTE bit in DMABCRL is cleared to 0 for the channel currently operating, the DMAC stops
on completion of the 1-byte or 1-word transfer in progress. DMAC operation resumes when the
DTE bit is set to 1 again. In full address mode, the same applies to the DTME bit in DMABCRL.
Figure 8.35 shows the procedure for forcibly terminating DMAC operation by software.
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Section 8 DMA Controller (DMAC)
[1]
Forced termination
of DMAC
Clear the DTE bit in DMABCRL to 0.
To prevent interrupt generation after forced
termination of DMAC operation, clear the DTIE bit
to 0 at the same time.
Clear DTE bit to 0
[1]
Forced termination
Figure 8.35 Example of Procedure for Forcibly Terminating DMAC Operation
8.5.15
Clearing Full Address Mode
Figure 8.36 shows the procedure for releasing and initializing a channel designated for full address
mode. After full address mode has been cleared, the channel can be set to another transfer mode
using the appropriate setting procedure.
[1]
Clearing full
address mode
Clear both the DTE bit and DTME bit in
DMABCRL to 0, or wait until the transfer ends
and the DTE bit is cleared to 0, then clear the
DTME bit to 0. Also clear the corresponding
DTIE bit to 0 at the same time.
Stop the channel
[1]
Initialize DMACR
[2]
Clear FAE bit to 0
[3]
[2]
Clear all bits in DMACRA and DMACRB to 0.
[3]
Clear the FAE bit in DMABCRH to 0.
Initialization;
operation halted
Figure 8.36 Example of Procedure for Clearing Full Address Mode
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Section 8 DMA Controller (DMAC)
8.6
Interrupt Sources
The sources of interrupts generated by the DMAC are transfer end and transfer break. Table 8.12
shows the interrupt sources and their priority order.
Table 8.12 Interrupt Sources and Priority Order
Interrupt
Name
Interrupt Source
Short Address Mode
Full Address Mode
DEND0A
Interrupt due to end of
transfer on channel 0A
Interrupt due to end of
transfer on channel 0
DEND0B
Interrupt due to end of
transfer on channel 0B
Interrupt due to break in
transfer on channel 0
DEND1A
Interrupt due to end of
transfer on channel 1A
Interrupt due to end of
transfer on channel 1
DEND1B
Interrupt due to end of
transfer on channel 1B
Interrupt due to break in
transfer on channel 1
Interrupt
Priority Order
High
Low
Enabling or disabling of each interrupt source is set by means of the DTIE bit in DMABCRL for
the corresponding channel in DMABCRL, and interrupts from each source are sent to the interrupt
controller independently. The priority of transfer end interrupts on each channel is decided by the
interrupt controller, as shown in table 8.12.
Figure 8.37 shows a block diagram of a transfer end/transfer break interrupt. An interrupt is
always generated when the DTIE bit is set to 1 while the DTE bit in DMABCRL is cleared to 0.
DTE/
DTME
Transfer end/transfer
break interrupt
DTIE
Figure 8.37 Block Diagram of Transfer End/Transfer Break Interrupt
In full address mode, a transfer break interrupt is generated when the DTME bit is cleared to 0
while the DTIE bit is set to 1. In both short address mode and full address mode, DMABCR
should be set so as to prevent the occurrence of a combination that constitutes a condition for
interrupt generation during setting.
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Section 8 DMA Controller (DMAC)
8.7
Usage Notes
8.7.1
DMAC Register Access during Operation
Except for forced termination of the DMAC, the operating (including transfer waiting state)
channel setting should not be changed. The operating channel setting should only be changed
when transfer is disabled. Also, DMAC registers should not be written to in a DMA transfer.
DMAC register reads during operation (including the transfer waiting state) are described below.
• DMAC control starts one cycle before the bus cycle, with output of the internal address.
Consequently, MAR is updated in the bus cycle before DMA transfer. Figure 8.38 shows an
example of the update timing for DMAC registers in dual address transfer mode.
DMA last transfer cycle
DMA transfer cycle
DMA read
DMA read
DMA write
DMA write
DMA
dead
φ
DMA Internal
address
DMA control
DMA register
operation
Idle
[1]
Transfer
source
Transfer
destination
Read
Write
[2]
Transfer
destination
Transfer
source
Read
Idle
[1]
Write
[2']
[1]
Transfer source address register MAR operation (incremented/decremented/fixed)
Transfer counter ETCR operation (decremented)
Block size counter ETCR operation (decremented in block transfer mode)
[2] Transfer destination address register MAR operation (incremented/decremented/fixed)
[2'] Transfer destination address register MAR operation (incremented/decremented/fixed)
Block transfer counter ETCR operation (decremented, in last transfer cycle of
a block in block transfer mode)
[3] Transfer address register MAR restore operation (in block or repeat transfer mode)
Transfer counter ETCR restore (in repeat transfer mode)
Block size counter ETCR restore (in block transfer mode)
Note: In single address transfer mode, the update timing is the same as [1].
The MAR operation is post-incrementing/decrementing of the DMA internal address value.
Figure 8.38 DMAC Register Update Timing
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Dead
[3]
Idle
Section 8 DMA Controller (DMAC)
• If a DMAC transfer cycle occurs immediately after a DMAC register read cycle, the DMAC
register is read as shown in figure 8.39.
DMA transfer cycle
CPU longword read
MAR upper
word read
MAR lower
word read
DMA read
DMA write
φ
DMA internal
address
DMA control
DMA register
operation
Idle
[1]
Transfe
source
Transfer
destination
Read
Write
Idle
[2]
Note: The lower word of MAR is the updated value after the operation in [1].
Figure 8.39 Contention between DMAC Register Update and CPU Read
8.7.2
Module Stop
When the MSTPA7 bit in MSTPCRA is set to 1, the DMAC clock stops, and the module stop
state is entered. However, 1 cannot be written to the MSTPA7 bit if any of the DMAC channels is
enabled. This setting should therefore be made when DMAC operation is stopped.
When the DMAC clock stops, DMAC register accesses can no longer be made. Since the
following DMAC register settings are valid even in the module stop state, they should be
invalidated, if necessary, before a module stop.
• Transfer end/break interrupt (DTE = 0 and DTIE = 1)
• TEND pin enable (TEE = 1)
• DACK pin enable (FAE = 0 and SAE = 1)
8.7.3
Medium-Speed Mode
When the DTA bit is cleared to 0, the internal interrupt signal that is specified for the DMAC
transfer source is detected at the edge. In medium-speed mode, the DMAC operates by the
medium-speed clock and the internal peripheral module operates by the high-speed clock.
Therefore, when the corresponding interruption source is cleared by the CPU, DTC, or other
channels of the DMAC and the period until the next interruption is executed is less than one state
regarding to the DMAC clock (bus master clock), the signal is not detected at the edge and
ignored.
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Section 8 DMA Controller (DMAC)
In medium-speed mode, the DREQ pin is sampled at the rising edge of the medium clock.
8.7.4
Activation by Falling Edge on DREQ Pin
DREQ pin falling edge detection is performed in synchronization with DMAC internal operations.
The operation is as follows:
[1] Activation request wait state: Waits for detection of a low level on the DREQ pin, and
switches to [2].
[2] Transfer wait state: Waits for DMAC data transfer to become possible, and switches to [3].
[3] Activation request disabled state: Waits for detection of a high level on the DREQ pin, and
switches to [1].
After DMAC transfer is enabled, a transition is made to [1]. Thus, initial activation after transfer is
enabled is performed on detection of a low level.
8.7.5
Activation Source Acceptance
At the start of activation source acceptance, a low level is detected in both DREQ pin falling edge
sensing and low level sensing. Similarly, in the case of an internal interrupt, the interrupt request is
detected. Therefore, a request is accepted from an internal interrupt or DREQ pin low level that
occurs before write to DMABCRL to enable transfer.
When the DMAC is activated, take any necessary steps to prevent an internal interrupt or DREQ
pin low level remaining from the end of the previous transfer, etc.
8.7.6
Internal Interrupt after End of Transfer
When the DTE bit in DMABCRL is cleared to 0 at the end of a transfer or by a forcible
termination, the selected internal interrupt request will be sent to the CPU or DTC even if the DTA
bit in DMABCRH is set to 1.
Also, if internal DMAC activation has already been initiated when operation is forcibly
terminated, the transfer is executed but flag clearing is not performed for the selected internal
interrupt even if the DTA bit is set to 1.
An internal interrupt request following the end of transfer or a forcible termination should be
handled by the CPU as necessary.
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Section 8 DMA Controller (DMAC)
8.7.7
Channel Re-Setting
To reactivate a number of channels when multiple channels are enabled, use exclusive handling of
transfer end interrupts, and perform DMABCR control bit operations exclusively.
Note, in particular, that in cases where multiple interrupts are generated between reading and
writing of DMABCR, and a DMABCR operation is performed during new interrupt handling, the
DMABCR write data in the original interrupt handling routine will be incorrect, and the write may
invalidate the results of the operations by the multiple interrupts. Ensure that overlapping
DMABCR operations are not performed by multiple interrupts, and that there is no separation
between read and write operations by the use of a bit-manipulation instruction.
Also, when the DTE and DTME bits are cleared by the DMAC or are written with 0, they must
first be read while cleared to 0 before the CPU can write 1 to them.
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Section 8 DMA Controller (DMAC)
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Section 9 Data Transfer Controller (DTC)
Section 9 Data Transfer Controller (DTC)
This LSI includes a data transfer controller (DTC). The DTC can be activated by an interrupt or
software, to transfer data.
Figure 9.1 shows a block diagram of the DTC.
The DTC’s register information is stored in the on-chip RAM. When the DTC is used, the RAME
bit in SYSCR must be set to 1. A 32-bit bus connects the DTC to the on-chip RAM (1 kbyte),
enabling 32-bit/1-state reading and writing of the DTC register information.
9.1
Features
• Transfer is possible over any number of channels
• Three transfer modes
Normal, repeat, and block transfer modes are available
• One activation source can trigger a number of data transfers (chain transfer)
• The direct specification of 16-Mbyte address space is possible
• Activation by software is possible
• Transfer can be set in byte or word units
• A CPU interrupt can be requested for the interrupt that activated the DTC
• Module stop mode can be set
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Section 9 Data Transfer Controller (DTC)
Internal address bus
On-chip
RAM
CPU interrupt
request
Register information
MRA MRB
CRA
CRB
DAR
SAR
DTC service
request
Control logic
DTC
DTVECR
Interrupt
request
DTCERA
to
DTCERG
and DTCERI
Interrupt controller
Internal data bus
Legend:
DTC mode registers A and B
MRA, MRB:
DTC transfer count registers A and B
CRA, CRB:
DTC source address register
SAR:
DTC destination address register
DAR:
DTCERA to DTCERG
DTC enable registers A to G and I
and DTCERI:
DTC vector register
DTVECR:
Figure 9.1 Block Diagram of DTC
9.2
Register Descriptions
The DTC has the following registers.
• DTC mode register A (MRA)
• DTC mode register B (MRB)
• DTC source address register (SAR)
• DTC destination address register (DAR)
• DTC transfer count register A (CRA)
• DTC transfer count register B (CRB)
These six registers cannot be directly accessed from the CPU.
When activated, the DTC reads a set of register information that is stored in on-chip RAM to the
corresponding DTC registers and transfers data. After the data transfer, it writes a set of updated
register information back to the RAM.
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Section 9 Data Transfer Controller (DTC)
• DTC enable registers A to G, and I (DTCERA to DTCERG, and DTCERI)
• DTC vector register (DTVECR)
9.2.1
DTC Mode Register A (MRA)
MRA selects the DTC operating mode.
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Section 9 Data Transfer Controller (DTC)
Bit
Bit Name
Initial Value
R/W
Description
7
SM1
Undefined

Source Address Mode 1 and 0
6
SM0
Undefined

These bits specify an SAR operation after a data
transfer.
0×: SAR is fixed
10: SAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
11: SAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
5
DM1
Undefined

Destination Address Mode 1 and 0
4
DM0
Undefined

These bits specify a DAR operation after a data
transfer.
0×: DAR is fixed
10: DAR is incremented after a transfer
(by +1 when Sz = 0; by +2 when Sz = 1)
11: DAR is decremented after a transfer
(by –1 when Sz = 0; by –2 when Sz = 1)
3
MD1
Undefined

DTC Mode 1 and 0
2
MD0
Undefined

These bits specify the DTC transfer mode.
00: Normal mode
01: Repeat mode
10: Block transfer mode
11: Setting prohibited
1
DTS
Undefined

DTC Transfer Mode Select
Specifies whether the source side or the
destination side is set to be a repeat area or block
area, in repeat mode or block transfer mode.
0: Destination side is repeat area or block area
1: Source side is repeat area or block area
0
Sz
Undefined

DTC Data Transfer Size
Specifies the size of data to be transferred.
0: Byte-size transfer
1: Word-size transfer
Legend: ×: Don’t care
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Section 9 Data Transfer Controller (DTC)
9.2.2
DTC Mode Register B (MRB)
MRB is an 8-bit register that selects the DTC operating mode.
Bit
Bit Name
Initial Value
R/W
Description
7
CHNE
Undefined

DTC Chain Transfer Enable
This bit specifies a chain transfer. For details, refer
to section 9.5.4, Chain Transfer.
In data transfer with CHNE set to 1, determination of
the end of the specified number of transfers,
clearing of the interrupt source flag, and clearing of
DTCER, are not performed.
0: DTC data transfer completed (waiting for start)
1: DTC chain transfer (reads new register
information and transfers data)
6
DISEL
Undefined

DTC Interrupt Select
This bit specifies whether CPU interrupt is disabled
or enabled after a data transfer.
0: Interrupt request is issued to the CPU when the
specified data transfer is completed
1: DTC issues interrupt request to the CPU in every
data transfer (DTC does not clear the interrupt
request flag that is a cause of the activation)
5 to
0
9.2.3

Undefined

Reserved
These bits have no effect on DTC operation. The
write value should always be 0.
DTC Source Address Register (SAR)
SAR is a 24-bit register that designates the source address of data to be transferred by the DTC.
For word-size transfer, specify an even source address.
9.2.4
DTC Destination Address Register (DAR)
DAR is a 24-bit register that designates the destination address of data to be transferred by the
DTC. For word-size transfer, specify an even destination address.
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Section 9 Data Transfer Controller (DTC)
9.2.5
DTC Transfer Count Register A (CRA)
CRA is a 16-bit register that designates the number of times data is to be transferred by the DTC.
In normal mode, the entire CRA functions as a 16-bit transfer counter (1 to 65,536). It is
decremented by 1 every time data is transferred, and transfer ends when the count reaches H'0000.
In repeat mode or block transfer mode, the CRA is divided into two parts; the upper 8 bits
(CRAH) and the lower 8 bits (CRAL). CRAH holds the number of transfers while CRAL
functions as an 8-bit transfer counter (1 to 256). CRAL is decremented by 1 every time data is
transferred, and the contents of CRAH are sent when the count reaches H'00.
9.2.6
DTC Transfer Count Register B (CRB)
CRB is a 16-bit register that designates the number of times data is to be transferred by the DTC in
block transfer mode. It functions as a 16-bit transfer counter (1 to 65,536) that is decremented by 1
every time data is transferred, and transfer ends when the count reaches H'0000.
9.2.7
DTC Enable Registers A to G, and I (DTCERA to DTCERG, and DTCERI)
DTCER is a set of registers to specify the DTC activation interrupt source, and comprised of eight
registers; DTCERA to DTCERG, and DTCERI. The correspondence between interrupt sources
and DTCE bits, and vector numbers generated by the interrupt controller are shown in table 9.2.
For DTCE bit setting, use bit manipulation instructions such as BSET and BCLR for reading and
writing. When multiple activation sources are to be set at one time, only at the initial setting,
writing data is enabled after executing a dummy read on the relevant register with all the interrupts
being masked.
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Section 9 Data Transfer Controller (DTC)
Bit
Bit Name
Initial
Value
R/W
Description
7
DTCEn7
0
R/W
DTC Activation Enable
6
DTCEn6
0
R/W
0: Disables an interrupt for DTC activation.
5
DTCEn5
0
R/W
4
DTCEn4
0
R/W
1: Specifies a relevant interrupt source as a DTC
activation source.
3
DTCEn3
0
R/W
[Clearing conditions]
2
DTCEn2
0
R/W
•
1
DTCEn1
0
R/W
When the DISEL bit in MRB is 1 and the data
transfer has ended
0
DTCEn0
0
R/W
•
When the specified number of transfers have
ended
[Retaining condition]
When the DISEL bit is 0 and the specified number
of transfers have not been completed
Note: n = A to G, and I
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Section 9 Data Transfer Controller (DTC)
9.2.8
DTC Vector Register (DTVECR)
DTVECR is an 8-bit readable/writable register that enables or disables DTC activation by
software, and sets a vector number for the software activation interrupt.
Bit
Bit Name
Initial
Value
R/W
Description
7
SWDTE
0
R/W
DTC Software Activation Enable
Enables or disables the DTC software activation.
0: Disables the DTC software activation.
1: Enables the DTC software activation.
[Clearing conditions]
•
When the DISEL bit is 0 and the specified
number of transfers have not ended
•
When 0 is written to the DISEL bit after a
software-activated data transfer end interrupt
(SWDTEND) request has been sent to the CPU.
[Retaining conditions]
•
When the DISEL bit is 1 and data transfer has
ended
•
When the specified number of transfers have
ended
•
When the software-activated data transfer is in
process
6
DTVEC6
0
R/W
DTC Software Activation Vectors 0 to 6
5
DTVEC5
0
R/W
4
DTVEC4
0
R/W
These bits specify a vector number for DTC
software activation.
3
DTVEC3
0
R/W
2
DTVEC2
0
R/W
The vector address is expressed as H'0400 +
(vector number × 2). For example, when DTVEC6 to
DTVEC0 = H'10, the vector address is H'0420.
1
DTVEC1
0
R/W
These bits are writable when SWDTE = 0.
0
DTVEC0
0
R/W
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Section 9 Data Transfer Controller (DTC)
9.3
Activation Sources
The DTC operates when activated by an interrupt or by a write to DTVECR by software. An
interrupt request can be directed to the CPU or DTC, as designated by the corresponding DTCER
bit. At the end of a data transfer (or the last consecutive transfer in the case of chain transfer), the
activation source or corresponding DTCER bit is cleared. The activation source flag, in the case of
RXI0, for example, is the RDRF flag of SCI_0. As there are a number of activation sources, the
activation source flag is not cleared with the last byte (or word) transfer. Take appropriate
measures at each interrupt as shown in table 9.1, Activation source and DTCER clearance.
Table 9.1
Activation Source and DTCER Clearance
Activation
Source
When the DISEL Bit is 0 and the
Specified Number of Transfers Have
Not Ended
When the DISEL Bit is 1,or when the
Specified Number of Transfers Have
Ended
Software
activation
•
•
The SWDTE bit remains set to 1
•
An interrupt is issued to the CPU
Interrupt
activation
•
The corresponding DTCER bit
remains set to 1
•
The corresponding DTCER bit is
cleared to 0
•
The activation source flag is cleared •
to 0
The activation source flag remains set
to 1
•
A request is issued to the CPU for the
activation source interrupt
The SWDTE bit is cleared to 0
When an interrupt has been designated a DTC activation source, the existing CPU mask level and
interrupt controller priorities have no effect. If there is more than one activation source at the same
time, the DTC operates in accordance with the default priorities.
Figure 9.2 shows a block diagram of activation source control. For details, see section 5, Interrupt
Controller.
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Section 9 Data Transfer Controller (DTC)
Source flag cleared
Clear
controller
Clear
DTCER
Clear request
Select
IRQ interrupt
Interrupt
request
DTC
Selection circuit
On-chip
peripheral
module
DTVECR
CPU
Interrupt controller
Interrupt mask
Figure 9.2 Block Diagram of DTC Activation Source Control
9.4
Location of Register Information and DTC Vector Table
Locate the register information in the on-chip RAM (addresses: H'FFEBC0 to H'FFEFBF).
Register information should be located at an address that is a multiple of four within the range.
Locating the register information in address space is shown in figure 9.3. Locate the MRA, SAR,
MRB, DAR, CRA, and CRB registers, in that order, from the start address of the register
information.
In the case of chain transfer, register information should be located in consecutive areas as shown
in figure 9.3, and the register information start address should be located at the vector address
corresponding to the interrupt source. Figure 9.4 shows the correspondence between DTC vector
address and register information. The DTC reads the start address of the register information from
the vector address set for each activation source, and then reads the register information from that
start address.
When the DTC is activated by software, the vector address is obtained from: H'0400 +
(DTVECR[6:0] × 2). For example, if DTVECR is H'10, the vector address is H'0420.
The configuration of the vector address is the same in both normal* and advanced modes, a 2-byte
unit being used in both cases. These two bytes specify the lower bits of the register information
start address.
Note: * Normal mode cannot be used in this LSI.
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Section 9 Data Transfer Controller (DTC)
Lower address
0
Register
information
start address
Chain
transfer
1
2
MRA
SAR
MRB
DAR
3
Register information
CRB
CRA
MRA
SAR
MRB
DAR
Register information
for 2nd transfer in
chain transfer
CRB
CRA
4 bytes
Figure 9.3 The Location of the DTC Register Information in the Address Space
DTC vector
address
Register information
start address
Register information
Chain transfer
Figure 9.4 Correspondence between DTC Vector Address and Register Information
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Section 9 Data Transfer Controller (DTC)
Table 9.2
Interrupt Sources, DTC Vector Addresses, and Corresponding DTCEs
Interrupt
Source
Origin of
Interrupt Source
DTC
Vector Number Vector Address
Software
Write to DTVECR
DTVECR
H'0400 +

vector number × 2
External pin
IRQ0
16
H'0420
DTCEA7
IRQ1
17
H'0422
DTCEA6
IRQ2
18
H'0424
DTCEA5
IRQ3
19
H'0426
DTCEA4
IRQ4
20
H'0428
DTCEA3
IRQ5
21
H'042A
DTCEA2
IRQ6
22
H'042C
DTCEA1
IRQ7
23
H'042E
DTCEA0
A/D
converter
ADI (A/D conversion 28
end)
H'0438
DTCEB6
TPU
Channel 0
TGI0A
32
H'0440
DTCEB5
TGI0B
33
H'0442
DTCEB4
TGI0C
34
H'0444
DTCEB3
TGI0D
35
H'0446
DTCEB2
TPU
Channel 1
TGI1A
40
H'0450
DTCEB1
TGI1B
41
H'0452
DTCEB0
TPU
Channel 2
TGI2A
44
H'0458
DTCEC7
TGI2B
45
H'045A
DTCEC6
TPU
TGI3A
4
Channel 3* TGI3B
48
H'0460
DTCEC5
49
H'0462
DTCEC4
TGI3C
50
H'0464
DTCEC3
TGI3D
51
H'0466
DTCEC2
TPU
TGI4A
4
Channel 4*
TGI4B
56
H'0470
DTCEC1
57
H'0472
DTCEC0
TPU
TGI5A
4
Channel 5* TGI5B
60
H'0478
DTCED5
61
H'047A
DTCED4
8-bit timer
channel 0
CMIA0
64
H'0480
DTCED3
CMIB0
65
H'0482
DTCED2
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DTCE*
1
Priority
High
Low
Section 9 Data Transfer Controller (DTC)
Interrupt
Source
Origin of
Interrupt Source
DTC
Vector Number Vector Address
DTCE*
Priority
8-bit timer
channel 1
CMIA1
68
H'0488
DTCED1
High
CMIB1
69
H'048A
DTCED0
2
DMAC*
DEND0A
72
H'0490
DTCEE7
DEND0A
73
H'0492
DTCEE6
DEND1A
74
H'0494
DTCEE5
DEND1A
75
H'0496
DTCEE4
SCI
channel 0
RXI0
81
H'04A2
DTCEE3
TXI0
82
H'04A4
DTCEE2
SCI
channel 1
RXI1
85
H'04AA
DTCEE1
TXI1
86
H'04AC
DTCEE0
SCI
4
channel 2*
RXI2
89
H'04B2
DTCEF7
TXI2
90
H'04B4
DTCEF6
8-bit timer
3
channel 2*
CMIA2
92
H'04B8
DTCEF5
CMIB2
93
H'04BA
DTCEF4
8-bit timer
3
channel 3*
CMIA3
96
H'04C0
DTCEF3
CMIB3
97
H'04C2
DTCEF2
IIC channel 0 IICI0
3
(optional)*
100
H'04C8
DTCEF1
IIC channel 1 IICI1
3
(optional)*
5
IEB*
IERxI (RxRDY)
102
H'04CC
DTCEF0
105
H'04D2
DTCEG6
IETxI (TxRDY)
106
H'04D4
DTCEG5
RXI3
121
H'04F2
DTCEI7
TXI3
122
H'04F4
DTCEI6
SCI
channel 3
Notes: 1.
2.
3.
4.
5.
1
Low
DTCE bits with no corresponding interrupt are reserved, and should be written with 0.
Supported only by the H8S/2239 Group.
These channels are not available in the H8S/2237 Group or H8S/2227 Group.
These channels are not available in the H8S/2227 Group.
Supported only by the H8S/2258 Group.
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Section 9 Data Transfer Controller (DTC)
9.5
Operation
Register information is stored in on-chip RAM. When activated, the DTC reads register
information in on-chip RAM and transfers data. After the data transfer, the DTC writes updated
register information back to the memory.
The pre-storage of register information in memory makes it possible to transfer data over any
required number of channels. The transfer mode can be specified as normal, repeat, and block
transfer mode. Setting the CHNE bit in MRB to 1 makes it possible to perform a number of
transfers with a single activation source (chain transfer).
The 24-bit SAR designates the DTC transfer source address, and the 24-bit DAR designates the
transfer destination address. After each transfer, SAR and DAR are independently incremented,
decremented, or left fixed depending on its register information.
Figure 9.5 shows the flowchart of DTC operation.
Start
Read DTC vector
Next transfer
Read register infomation
Data transfer
Write register information
CHNE = 1
Yes
No
Transfer
Counter = 0
or DISEL = 1
Yes
No
Clear an activation flag
Clear DTCER
End
Interrupt exception
handling
*
Note: * For details of the operation, see the section for each peripheral module.
Figure 9.5 Flowchart of DTC Operation
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Section 9 Data Transfer Controller (DTC)
9.5.1
Normal Mode
In normal mode, one operation transfers one byte or one word of data.
From 1 to 65,536 transfers can be specified. Once the specified number of transfers have been
completed, a CPU interrupt can be requested.
Table 9.3 lists the register information in normal mode. Figure 9.6 shows the memory mapping in
normal mode.
Table 9.3
Register Information in Normal Mode
Name
Abbreviation
Function
DTC source address register
SAR
Designates source address
DTC destination address register
DAR
Designates destination address
DTC transfer count register A
CRA
Designates transfer count
DTC transfer count register B
CRB
Not used
SAR
DAR
Transfer
Figure 9.6 Memory Mapping in Normal Mode
9.5.2
Repeat Mode
In repeat mode, one operation transfers one byte or one word of data.
From 1 to 256 transfers can be specified. Once the specified number of transfers have ended, the
initial state of the transfer counter and the address register specified as the repeat area is restored,
and transfer is repeated. In repeat mode the transfer counter value does not reach H'00, and
therefore CPU interrupts cannot be requested when DISEL = 0.
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Section 9 Data Transfer Controller (DTC)
Table 9.4 lists the register information in repeat mode. Figure 9.7 shows the memory mapping in
repeat mode.
Table 9.4
Register Information in Repeat Mode
Name
Abbreviation
Function
DTC source address register
SAR
Designates source address
DTC destination address register
DAR
Designates destination address
DTC transfer count register AH
CRAH
Holds number of transfers
DTC transfer count register AL
CRAL
Designates transfer count
DTC transfer count register B
CRB
Not used
SAR
or
DAR
Repeat area
Transfer
DAR
or
SAR
Figure 9.7 Memory Mapping in Repeat Mode
9.5.3
Block Transfer Mode
In block transfer mode, one operation transfers one block of data. Either the transfer source or the
transfer destination is designated as a block area.
The block size can be between 1 to 256. When the transfer of one block ends, the initial state of
the block size counter and the address register specified as the block area is restored. The other
address register is then incremented, decremented, or left fixed.
From 1 to 65,536 transfers can be specified. Once the specified number of transfers have been
completed, a CPU interrupt is requested.
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Section 9 Data Transfer Controller (DTC)
Table 9.5 lists the register information in block transfer mode. Figure 9.8 shows the memory
mapping in block transfer mode.
Table 9.5
Register Information in Block Transfer Mode
Name
Abbreviation
Function
DTC source address register
SAR
Designates source address
DTC destination address register
DAR
Designates destination address
DTC transfer count register AH
CRAH
Holds block size
DTC transfer count register AL
CRAL
Designates block size count
DTC transfer count register B
CRB
Transfer count
First block
SAR
or
DAR
·
·
·
Block area
Transfer
DAR
or
SAR
Nth block
Figure 9.8 Memory Mapping in Block Transfer Mode
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Section 9 Data Transfer Controller (DTC)
9.5.4
Chain Transfer
Setting the CHNE bit in MRB to 1 enables a number of data transfers to be performed
consecutively in response to a single transfer request. SAR, DAR, CRA, CRB, MRA, and MRB,
which define data transfers, can be set independently.
Figure 9.9 shows the memory map for chain transfer.
When activated, the DTC reads the register information start address stored at the vector address,
and then reads the first register information at that start address. After the data transfer, the CHNE
bit will be tested. When it has been set to 1, DTC reads the next register information located in a
consecutive area and performs the data transfer. These sequences are repeated until the CHNE bit
is cleared to 0.
In the case of transfer with CHNE set to 1, an interrupt request to the CPU is not generated at the
end of the specified number of transfers or by setting of the DISEL bit to 1, and the interrupt
source flag for the activation source is not affected.
Source
Destination
Register information
CHNE = 1
DTC vector
address
Register information
start address
Register information
CHNE = 0
Source
Destination
Figure 9.9 Chain Transfer Operation
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Section 9 Data Transfer Controller (DTC)
9.5.5
Interrupts
An interrupt request is issued to the CPU when the DTC has completed the specified number of
data transfers, or a data transfer for which the DISEL bit was set to 1. In the case of interrupt
activation, the interrupt set as the activation source is generated. These interrupts to the CPU are
subject to CPU mask level and interrupt controller priority level control.
In the case of software activation, a software-activated data transfer end interrupt (SWDTEND) is
generated.
When the DISEL bit is 1 and one data transfer has been completed, or the specified number of
transfers have been completed, after data transfer ends the SWDTE bit is held at 1 and an
SWDTEND interrupt is generated. The interrupt handling routine will then clear the SWDTE bit
to 0.
When the DTC is activated by software, an SWDTEND interrupt is not generated during a data
transfer wait or during data transfer even if the SWDTE bit is set to 1.
9.5.6
Operation Timing
Figures 9.10 to 9.12 show the DTC operation timings.
φ
DTC activation
request
DTC
request
Vector read
Data transfer
Address
Read Write
Transfer
information read
Transfer
information write
Figure 9.10 DTC Operation Timing (Example in Normal Mode or Repeat Mode)
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Section 9 Data Transfer Controller (DTC)
φ
DTC activation
request
DTC
request
Data transfer
Vector read
Read Write Read Write
Address
Transfer
information read
Transfer
information write
Figure 9.11 DTC Operation Timing
(Example of Block Transfer Mode, with Block Size of 2)
φ
DTC activation
request
DTC
request
Data transfer
Data transfer
Read Write
Read Write
Vector read
Address
Transfer
information read
Transfer
information
write
Transfer
information
read
Transfer
information write
Figure 9.12 DTC Operation Timing (Example of Chain Transfer)
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Section 9 Data Transfer Controller (DTC)
9.5.7
Number of DTC Execution States
Table 9.6 lists execution status for a single DTC data transfer, and table 9.7 shows the number of
states required for each execution status.
Table 9.6
DTC Execution Status
Mode
Vector Read
I
Register Information
Read/Write
Data Read
J
K
Data Write
L
Internal
Operations
M
Normal
1
6
1
1
3
Repeat
1
6
1
1
3
Block transfer
1
6
N
N
3
Legend:
N: Block size (initial setting of CRAH and CRAL)
Table 9.7
Number of States Required for Each Execution Status
Object to be Accessed
OnChip
RAM
OnChip
ROM
Internal I/O
Registers
External Devices
Bus width
32
16
8
16
8
8
16
16
Access states
1
1
2
2
2
3
2
3
Execution
Status
Vector read SI

1


4
6+2m 2
3+m
Register information
read/write SJ
1







Byte data read SK
1
1
2
2
2
3+m
2
3+m
Word data read SK
1
1
4
2
4
6+2m 2
3+m
Byte data write SL
1
1
2
2
2
3+m
2
3+m
Word data write SL
1
1
4
2
4
6+2m 2
3+m
Internal operation SM
1
Legend:
m: The number of wait states for accessing external devices.
The number of execution states is calculated from using the formula below. Note that Σ is the sum
of all transfers activated by one activation event (the number in which the CHNE bit is set to 1,
plus 1).
Number of execution states = I · SI + Σ (J · SJ + K · SK + L · SL) + M · SM
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Section 9 Data Transfer Controller (DTC)
For example, when the DTC vector address table is located in the on-chip ROM, normal mode is
set, and data is transferred from on-chip ROM to an internal I/O register, then the time required for
the DTC operation is 13 states. The time from activation to the end of the data write is 10 states.
9.6
Procedures for Using DTC
9.6.1
Activation by Interrupt
The procedure for using the DTC with interrupt activation is as follows:
1.
Set the MRA, MRB, SAR, DAR, CRA, and CRB register information in on-chip RAM.
2.
Set the start address of the register information in the DTC vector address.
3.
Set the corresponding bit in DTCER to 1.
4.
Set the enable bits for the interrupt sources to be used as the activation sources to 1. The DTC
is activated when an interrupt used as an activation source is generated.
5.
After one data transfer has been completed, or after the specified number of data transfers
have been completed, the DTCE bit is cleared to 0 and a CPU interrupt is requested. If the
DTC is to continue transferring data, set the DTCE bit to 1.
9.6.2
Activation by Software
The procedure for using the DTC with software activation is as follows:
1.
Set the MRA, MRB, SAR, DAR, CRA, and CRB register information in on-chip RAM.
2.
Set the start address of the register information in the DTC vector address.
3.
Check that the SWDTE bit is 0.
4.
Write 1 to SWDTE bit and the vector number to DTVECR.
5.
Check the vector number written to DTVECR.
6.
After one data transfer has been completed, if the DISEL bit is 0 and a CPU interrupt is not
requested, the SWDTE bit is cleared to 0. If the DTC is to continue transferring data, set the
SWDTE bit to 1. When the DISEL bit is 1, or after the specified number of data transfers
have been completed, the SWDTE bit is held at 1 and a CPU interrupt is requested.
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Section 9 Data Transfer Controller (DTC)
9.7
Examples of Use of the DTC
9.7.1
Normal Mode
An example is shown in which the DTC is used to receive 128 bytes of data via the SCI.
1.
Set MRA to a fixed source address (SM1 = SM0 = 0), incrementing destination address
(DM1 = 1, DM0 = 0), normal mode (MD1 = MD0 = 0), and byte size (Sz = 0). The DTS bit
can have any value. Set MRB for one data transfer by one interrupt (CHNE = 0, DISEL = 0).
Set the SCI RDR address in SAR, the start address of the RAM area where the data will be
received in DAR, and 128 (H'0080) in CRA. CRB can be set to any value.
2.
Set the start address of the register information at the DTC vector address.
3.
Set the corresponding bit in DTCER to 1.
4.
Set the SCI to the appropriate receive mode. Set the RIE bit in SCR to 1 to enable the
reception complete (RXI) interrupt. Since the generation of a receive error during the SCI
reception operation will disable subsequent reception, the CPU should be enabled to accept
receive error interrupts.
5.
Each time the reception of one byte of data has been completed on the SCI, the RDRF flag
in SSR is set to 1, an RXI interrupt is generated, and the DTC is activated. The receive data is
transferred from RDR to RAM by the DTC. DAR is incremented and CRA is decremented.
The RDRF flag is automatically cleared to 0.
6.
When CRA becomes 0 after the 128 data transfers have been completed, the RDRF flag is
held at 1, the DTCE bit is cleared to 0, and an RXI interrupt request is sent to the CPU. The
interrupt handling routine will perform wrap-up processing.
9.7.2
Software Activation
An example is shown in which the DTC is used to transfer a block of 128 bytes of data by means
of software activation. The transfer source address is H'1000 and the destination address is
H'2000. The vector number is H'60, so the vector address is H'04C0.
1.
Set MRA to incrementing source address (SM1 = 1, SM0 = 0), incrementing destination
address (DM1 = 1, DM0 = 0), block transfer mode (MD1 = 1, MD0 = 0), and byte size (Sz =
0). The DTS bit can have any value. Set MRB for one block transfer by one interrupt (CHNE
= 0). Set the transfer source address (H'1000) in SAR, the destination address (H'2000) in
DAR, and 128 (H'8080) in CRA. Set 1 (H'0001) in CRB.
2.
Set the start address of the register information at the DTC vector address (H'04C0).
3.
Check that the SWDTE bit in DTVECR is 0. Check that there is currently no transfer
activated by software.
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Section 9 Data Transfer Controller (DTC)
4.
Write 1 to the SWDTE bit and the vector number (H'60) to DTVECR. The write data is
H'E0.
5.
Read DTVECR again and check that it is set to the vector number (H'60). If it is not, this
indicates that the write failed. This is presumably because an interrupt occurred between steps
3 and 4 and led to a different software activation. To activate this transfer, go back to step 3.
6.
If the write was successful, the DTC is activated and a block of 128 bytes of data is
transferred.
7.
After the transfer, an SWDTEND interrupt occurs. The interrupt handling routine should
clear the SWDTE bit to 0 and perform other wrap-up processing.
9.8
Usage Notes
9.8.1
Module Stop Mode Setting
DTC operation can be disabled or enabled using the module stop control register. The initial
setting is for DTC operation to be enabled. Register access is disabled by setting module stop
mode. Module stop mode cannot be set during DTC operation. For details, refer to section 24,
Power-Down Modes.
9.8.2
On-Chip RAM
The MRA, MRB, SAR, DAR, CRA, and CRB registers are all located in on-chip RAM. When the
DTC is used, the RAME bit in SYSCR should not be cleared to 0.
9.8.3
DTCE Bit Setting
For DTCE bit setting, use bit manipulation instructions such as BSET and BCLR. If all interrupts
are masked, multiple activation sources can be set at one time (only at the initial setting) by
writing data after executing a dummy read on the relevant register.
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Section 10 I/O Ports
Section 10 I/O Ports
Table 10.1 summarizes the port functions. The pins of each port also have other functions such as
input/output or interrupt input pins of on-chip peripheral modules.
Each I/O port includes a data direction register (DDR) that controls input/output, a data register
(DR) that stores output data, and a port register (PORT) used to read the pin states. The input-only
ports do not have DR and DDR registers.
Ports A to E have a built-in input pull-up MOS function and an input pull-up MOS control register
(PCR) to control the on/off state of input pull-up MOS respectively.
Ports 3 and A include an open-drain control register (ODR) that controls the on/off state of the
output buffer PMOS respectively.
All the I/O ports can drive a single TTL load and a 30-pF capacitive load.
The P35 and P34 pins on port 3 are NMOS push pull outputs.*
The IRQ pin is Schmitt-trigger input.
Note: * Supported only by the H8S/2258 Group, H8S/2239 Group, and H8S/2238 Group.
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Section 10 I/O Ports
Table 10.1 Port Functions
Port
Port 1
Description
General I/O port
also functioning as
TPU_2, TPU_1, and
TPU_0 I/O pins,
interrupt input pins,
address output pins,
and DMAC output
pins
Mode4
Mode5 Mode 6
Mode 7
P17/TIOCB2/TCLKD
P17/TIOCB2/TCLKD
P16/TIOCA2/IRQ1
P16/TIOCA2/IRQ1
P15/TIOCB1/TCLKC
P15/TIOCB1/TCLKC
P14/TIOCA1/IRQ0
P14/TIOCA1/IRQ0
P13/TIOCD0/TCLKB/A23
P13/TIOCD0/TCLKB
P12/TIOCC0/TCLKA/A22
P12/TIOCC0/TCLKA
Input/Output and
Output Type
Schmitt-trigger input
(IRQ0, IRQ1)
P11/TIOCB0/DACK1*3/A21 P11/TIOCB0/DACK1*3
P10/TIOCA0/DACK0*3/A20 P10/TIOCA0/DACK0*3
Port 3
General I/O port
also functioning as
I2C bus interface*1
I/O pins, SCI_1 and
SCI_0 I/O pins, and
interrupt input pins
P36
Specifiable of open
drain output
P35/SCK1/SCL0*1/IRQ5
Schmitt-trigger input
(IRQ4, IRQ5)
P34/RxD1/SDA0*1
P33/TxD1/SDA0*1
NMOS push-pull
output*1 (P35, P34,
SCK1)
P32/SCK0/SDA1*1/IRQ4
P31/RxD0
P30/TxD0
Port 4
General input port
also functioning as
A/D converter
analog input pins
P47/AN7
P46/AN6
P45/AN5
P44/AN4
P43/AN3
P42/AN2
P41/AN1
P40/AN0
Port 7
General I/O port
also functioning as
SCI_3 I/O pins,
TMR_3*1, TMR_2*1,
TMR_1, TMR_0 I/O
pins, and DMAC I/O
pins
P77/TxD3
P76/RxD3
P75/TMO3*1/SCK3
P74/TMO2*1/MRES
P73/TMO1/TEND1*3/CS7
*3
P73/TMO1/TEND1*3
P72/TMO0/TEND0 /CS6
P72/TMO0/TEND0*3
P71/TMRI23*1/TMCI23*1/
DREQ1*3/CS5
P71/TMRI23*1/TMCI23*1/
DREQ1*3
P70/TMRI01/TMCI01/
DREQ0*3/CS4
P70/TMRI01/TMCI01/DRE
Q0*3
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Section 10 I/O Ports
Port
Port 9
Description
Mode 4
Mode5
Mode 6
Mode 7
Input/Output and
Output Type
General I/O port
P97/DA1*2
also functioning as
P96/ DA0*2
D/A converter*2
analog output pins
Port A
Port B
Port C
Port D
General I/O port
also functioning as
SCI_2*2 I/O pins
and address output
pins
PA3/A19/SCK2*2
PA3/SCK2*2
PA2/A18/RxD2*2
PA2/RxD2*2
PA1/A17/TxD2*2
PA1/TxD2*2
PA0/A16
PA0
General I/O port
also functioning as
TPU_5*2, TPU_4*2,
TPU_3*2 I/O pins,
and address output
pins
PB7/A15/TIOCB5*2
PB7/TIOCB5*2
*2
*2
PB6/TIOCA5
*2
PB5/A13/TIOCB4
PB5/TIOCB4*2
PB4/A12/TIOCA4*2
PB4/TIOCA4*2
PB3/A11/TIOCD3*2
PB3/TIOCD3*2
PB2/A10/TIOCC3*2
PB2/TIOCC3*2
PB1/A9/TIOCB3*2
PB1/TIOCB3*2
PB0/A8/TIOCA3*2
PB0/TIOCA3*2
PB6/A14/TIOCA5
General I/O port
A7
also functioning as
A6
address output pins
A5
PC7/A7 PC7
A4
PC4/A4 PC4
A3
PC3/A3 PC3
A2
PC2/A2 PC2
A1
PC1/A1 PC1
A0
PC0/A0 PC0
PC6/A6 PC6
Specifiable of built-in
input pull-up MOS
open drain output
Built-in input pull-up
MOS
Built-in input pull-up
MOS
PC5/A5 PC5
General I/O port
D15
also functioning as
D14
data I/O pins
D13
PD7
D12
PD4
D11
PD3
D10
PD2
D9
PD1
D8
PD0
PD6
Built-in input pull-up
MOS
PD5
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Section 10 I/O Ports
Port
Port E
Port F
Port G
Description
Mode 4
Mode5
Mode 6
Mode 7
General I/O port
PE7/D7
also functioning as
PE6/D6
data I/O pins
PE5/D5
PE7
PE4/D4
PE4
PE3/D3
PE3
PE2/D2
PE2
PE1/D1
PE1
PE0/D0
PE0
PF7/φ
PF7/φ
AS
PF6
RD
PF5
HWR
PF4
PF3/LWR/ADTRG/IRQ3
PF3/ADTRG/IRQ3
PF2/WAIT
PF2
PF1/BACK/BUZZ
PF1/BUZZ
PF0/BREQ/IRQ2
PF0/IRQ2
General I/O port
also functioning as
interrupt input pins,
bus control I/O
pins, an A/D
converter input pins
and WDT output
pins
General I/O port
PG4/CS0
also functioning as
PG3/Rx/CS1*4
interrupt input pins
PG2/Tx /CS2*4
Notes: 1.
2.
3.
4.
PE6
Built-in input pull-up
MOS
PE5
PG4
PG3/Rx
PG2/Tx
PG1/CS3/IRQ7
PG1/IRQ7
PG0/IRQ6
PG0/IRQ6
Not available in the H8S/2237 Group and H8S/2227 Group.
Not available in the H8S/2227 Group.
Supported only by the H8S/2239 Group.
Supported only by the H8S/2258 Group.
Rev. 5.00 Aug 08, 2006 page 308 of 982
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Input/Output and
Output Type
Schmit-trigger input
(IRQ2, IRQ3)
Schmit-trigger input
(IRQ6, IRQ7)
Section 10 I/O Ports
10.1
Port 1
Port 1 is an 8-bit I/O port and has the following registers.
• Port 1 data direction register (P1DDR)
• Port 1 data register (P1DR)
• Port 1 register (PORT1)
10.1.1
Port 1 Data Direction Register (P1DDR)
P1DDR specifies input or output of the port 1 pins using the individual bits. P1DDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
P17DDR
0
W
6
P16DDR
0
W
5
P15DDR
0
W
When a pin is specified as a general purpose I/O
port, setting this bit to 1 makes the corresponding
port 1 pin an output pin. Clearing this bit to 0
makes the pin an input pin.
4
P14DDR
0
W
3
P13DDR
0
W
2
P12DDR
0
W
1
P11DDR
0
W
0
P10DDR
0
W
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Section 10 I/O Ports
10.1.2
Port 1 Data Register (P1DR)
P1DR stores output data for port 1 pins.
Bit
Bit Name
Initial Value
R/W
Description
7
P17DR
0
R/W
6
P16DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
P15DR
0
R/W
4
P14DR
0
R/W
3
P13DR
0
R/W
2
P12DR
0
R/W
1
P11DR
0
R/W
0
P10DR
0
R/W
10.1.3
Port 1 Register (PORT1)
PORT1 shows the pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
P17
—*
R
P16
—*
R
P15
—*
R
If a port 1 read is performed while P1DDR bits are
set to 1, the P1DR values are read. If a port 1 read
is performed while P1DDR bits are cleared to 0,
the pin states are read.
4
P14
—*
R
3
P13
—*
R
2
P12
R
1
P11
—*
—*
0
P10
—*
R
7
6
5
Note:
*
R
Determined by the states of pins P17 to P10.
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Section 10 I/O Ports
10.1.4
Pin Functions
Port 1 pins also function as TPU I/O pins (TPU_0, TPU_1, and TPU_2), DMAC* output pins,
interrupt input pins and address output pins. Values of the register and pin functions are shown
below.
Note: * Supported only by the H8S/2239 Group.
• P17/TIOCB2/TCLKD
The pin functions are switched as shown below according to the combination of the TPU
channel 2 setting, TPSC2 to TPS0 bits in TCR_0 and TCR_5, and the P17DDR bit.
TPU Channel 2 Setting*
1
Output

0
TIOCB2 output pin
P17 input pin
P17DDR
Pin functions
Input or Initial Value
1
P17 output pin
2
TIOCB2 input pin*
TCLKD input pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCB2 input when TPU channel 2 timer operating mode is set to
normal operating or phase counting mode and IOB3 in TIOR_2 is set to 1.
3. This pin functions as TCLKD input when TPSC2 to TPSC0 in TCR_0 or TCR_5 are set
to 111 or when channels 2 and 4 are set to phase counting mode.
• P16/TIOCA2/IRQ1
The pin functions are switched as shown below according to the combination of the TPU
channel 2 setting and the P16DDR bit.
TPU Channel 2 Setting*
1
P16DDR
Pin functions
Output
Input or Initial Value

0
1
TIOCA2 output pin
P16 input pin
P16 output pin
TIOCA2 input pin*
3
IRQ1 input pin*
2
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCA2 input when TPU channel 2 timer operating mode is set to
normal operating or phase counting mode and IOA3 in TIOR_2 is 1.
3. When this pin is used as an external interrupt pin, do not specify other functions.
Rev. 5.00 Aug 08, 2006 page 311 of 982
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Section 10 I/O Ports
• P15/TIOCB1/TCLKC
The pin functions are switched as shown below according to the combination of the TPU
channel 1 setting, TPSC2 to TPS0 bits in TCR_0, TCR_2, TCR_4, and TCR_5 and the
P15DDR bit.
TPU Channel 1 Setting*
1
Output

0
TIOCB1 output pin
P15 input pin
P15DDR
Pin functions
Input or Initial Value
1
P15 output pin
2
TIOCB1 input pin*
TCLKC input pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCB1 input when TPU channel 1 timer operating mode is set to
normal operating or phase counting mode and IOB3 to IOB0 in TIOR_1 are set to10xx.
3. This pin functions as TCLKC input when TPSC2 to TPSC0 in TCR_0 or TCR_2 are set
to 110 or TPSC2 to TPSC0 in TCR_4 or TCR_0 are 101 or when channels 2 and 4 are
set to phase counting mode.
• P14/TIOCA1/IRQ0
The pin functions are switched as shown below according to the combination of the TPU
channel 1 setting and the P14DDR bit.
TPU Channel 1 Setting*
1
P14DDR
Pin functions
Output
Input or Initial Value

0
TIOCA1 output pin
P14 input pin
1
P14 output pin
2
TIOCA1 input pin*
IRQ0 input pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCA1 input when TPU channel 1 timer operating mode is set to
normal operating or phase counting mode and IOA3 to IOA0 in TIOR_1 are set to 10xx.
3. When this pin is used as an external interrupt pin, do not specify other functions.
Rev. 5.00 Aug 08, 2006 page 312 of 982
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Section 10 I/O Ports
• P13/TIOCD0/TCLKB/A23
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 0 setting, TPSC2 to TPSC0 bits in TCR_0 to TCR_2, AE3 to AE0 bits
in PFCR and the P13DDR bit.
Operating mode
AE3 to AE0
TPU Channel 0
Setting*1
P13DDR
Pin functions
Modes 4 to 6
B'1111

Mode 7

Other than B'1111
Output
Input or Initial Value
Output
Input or Initial Value


0
1

0
1
A23
output
pin
TIOCD0
output
pin
P13 input
pin
P13
output pin
TIOCD0
output
pin
P13 input
pin
P13
output pin
TIOCD0 input*2
TCLKB input pin*3
TIOCD0 input pin*2
TCLKB input pin*3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCD0 input when TPU channel 0 timer operating mode is set to
normal operating and IOD3 to IOD0 in TIORL_0 are set to 10xx.
3. This pin functions as TCLKB input when TPSC2 to TPSC0 in any of TCR_0 to TCR_2
are set to 101 or when channels 1 and 5 are set to phase counting mode.
• P12/TIOCC0/TCLKA/A22
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 0 setting, TPSC2 to TPSC0 bits in TCR_0 to TCR_5, AE3 to AE0 bits
in PFCR, and the P12DDR bit.
Operating mode
AE3 to AE0
Modes 4 to 6
B'1111
Mode 7

Other than B'1111
TPU Channel 0
Setting*1

Output
P12DDR


0
1

0
1
A22
output
pin
TIOCC0
output
pin
P12 input
pin
P12
output pin
TIOCC0
output
pin
P12 input
pin
P12
output pin
Pin functions
Input or Initial Value
TIOCC0 input pin*2
TCLKA input pin*3
Output
Input or Initial Value
TIOCC0 input pin*2
TCLKA input pin*3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCC0 input when TPU channel 0 timer operating mode is set to
normal operating and IOC3 to IOC0 in TIORL_0 are set to 10xx.
3. This pin functions as TCLKB input when TPSC2 to TPSC0 in any of TCR_0 to TCR_5
are set to 100 or when channels 1 and 5 are set to phase counting mode.
Rev. 5.00 Aug 08, 2006 page 313 of 982
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Section 10 I/O Ports
• P11/TIOCB0/DACK1/A21
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 0 setting, AE3 to AE0 bits in PFCR, the SAE1 bit*3 in DMABCRH,
and the P11DDR bit.
Operating
mode
AE3 to AE0
*3
Modes 4 to 6
B'111x
SAE1

TPU Channel 0
Setting*1

Output
P11DDR


Pin functions
A21
output
pin
Mode 7

Other than B'111x
0
1
Input or Initial
Value

0
TIOCB0
output
pin
1
P11
input
pin
P11
output
pin

Output

*3
DACK1
output
pin
Input or Initial Value

0
1
TIOCB0
output
pin
P11 input
pin
P11
output
pin
TIOCB0 input pin*2
TIOCB0 input pin*2
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCB0 input when TPU channel 0 timer operating mode is set to
normal operating and IOB3 to IOB0 in TIORH_0 are set to 10xx.
3. Supported only by the H8S/2239 Group.
• P10/TIOCA0/DACK0/A20
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 0 setting, AE3 to AE0 bits in PFCR, the SAE0 bit*3 in DMABCRH,
and the P10DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
B'1101 or
B'111x

TPU Channel 0
Setting*1

Output
P10DDR


A20
output
pin

Other than (B'1101 or B'111x)
SAE0*3
Pin functions
Mode 7
TIOCA0
output
pin

0
1
Input or Initial
Value

Output
1


0
1
P10
output
pin
DACK0*3
output
pin
TIOCA0
output
pin
P10 input
pin
P10
output
pin
0
P10
input
pin
TIOCA0 input pin*2
Input or Initial Value
TIOCA0 input pin*2
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCA0 input when TPU channel 0 timer operating mode is set to
normal operating and IOA3 to IOA0 in TIORH_0 are set to 10xx.
3. Supported only by the H8S/2239 Group.
Rev. 5.00 Aug 08, 2006 page 314 of 982
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Section 10 I/O Ports
10.2
Port 3
Port 3 is a general 7-bit I/O port and has the following registers.
The P34, P35, and SCK1 function as NMOS push/pull outputs.*
• Port 3 data direction register (P3DDR)
• Port 3 data register (P3DR)
• Port 3 register (PORT3)
• Port 3 open drain control register (P3ODR)
Note: * Function as CMOS outputs in the H8S/2237 Group and H8S/2227 Group.
10.2.1
Port 3 Data Direction Register (P3DDR)
P3DDR specifies input or output of the port 3 pins using the individual bits.
P3DDR cannot be read; if it is, an undefined value will be read.
This register is a write-only register, and cannot be written by bit manipulation instruction. For
details, see section 2.9.4, Access Methods for Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
—
Undefined
—
Reserved
6
P36DDR
0
W
5
P35DDR
0
W
4
P34DDR
0
W
3
P33DDR
0
W
2
P32DDR
0
W
1
P31DDR
0
W
0
P30DDR
0
W
These bits are always read as undefined value.
When a pin is specified as a general purpose I/O
port, setting this bit to 1 makes the corresponding
port 3 pin an output port. Clearing this bit to 0
makes the pin an input port.
Rev. 5.00 Aug 08, 2006 page 315 of 982
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Section 10 I/O Ports
10.2.2
Port 3 Data Register (P3DR)
P3DR stores output data for port 3 pins.
Bit
Bit Name
Initial Value
R/W
Description
7
—
Undefined
—
Reserved
These bits are always read as undefined value.
6
P36DR
0
R/W
5
P35DR
0
R/W
4
P34DR
0
R/W
3
P33DR
0
R/W
2
P32DR
0
R/W
1
P31DR
0
R/W
0
P30DR
0
R/W
10.2.3
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
Port 3 Register (PORT3)
Bit
Bit Name
Initial Value
R/W
Description
7
—
Undefined
—
Reserved
6
P36
—*
R
5
P35
—*
R
4
P34
R
3
P33
—*
—*
2
P32
R
1
P31
—*
—*
P30
—*
R
These bits are always read as undefined value.
0
Note:
*
If a port 3 read is performed while P3DDR bits are
set to 1, the P3DR values are read. If a port 3 read
is performed while P3DDR bits are cleared to 0,
the pin states are read.
R
R
Determined by the states of pins P36 to P30.
Rev. 5.00 Aug 08, 2006 page 316 of 982
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Section 10 I/O Ports
10.2.4
Port 3 Open Drain Control Register (P3ODR)
P3ODR controls on/off state of the PMOS for port 3 pins.
Bit
Bit Name
Initial Value
R/W
Description
7
—
Undefined
—
Reserved
These bits are always read as undefined value.
6
P36ODR
0
R/W
5
P35ODR
0
R/W
4
P34ODR
0
R/W
3
P33ODR
0
R/W
2
P32ODR
0
R/W
1
P31ODR
0
R/W
0
P30ODR
0
R/W
Note:
10.2.5
*
When each of P36ODR and P33ODR to P30ODR
bits is set to 1, the corresponding pins P36 and
P33 to P30 function as NMOS open drain outputs.
When cleared to 0, the corresponding pins
function as CMOS outputs. When each of
P35ODR and P34ODR bits is set to 1, the
corresponding pins P35 and P34 function as open
drain outputs. When they are cleared to 0, the
corresponding pins function as NMOS push pull
outputs.*
When they are cleared to 0, the corresponding pins function as CMOS outputs in the
H8S/2237 Group and H8S/2227 Group.
Pin Functions
The port 3 pins also function as SCI I/O input pins, I2C bus interface* I/O pins, and as external
interrupt input pins.
As shown in figure 10.1, when the pins P35, P34, SCK1, SCL0, or SDA0 type open drain output
is used, a bus line is not affected even if the power supply for this LSI fails. Use (a) type open
drain output when using a bus line having a state in which the power is not supplied to this LSI.
Note: * The I2C bus interface is not available in the H8S/2237 Group and H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 317 of 982
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Section 10 I/O Ports
NMOS Off
PMOS Off
1
0
Output
Output
Input
Input
(a) Open drain output type for
P34, P35, SCK1, SCL0, and SDA0 pins
(b) Open drain output type for
P33 to P30, SCL1, and SDA1 pins
Figure 10.1 Types of Open Drain Outputs
The P34, P35, and SCK1 NMOS push-pull outputs will not output the Vcc level, regardless of the
load, even if set to the high output state. External pull-up resistors are required to output the Vcc
level.
Notes: 1. Note that the signal rise and fall times become longer when external pull-up resistors
are connected. If signals with long rise and fall times are input, use input circuits with
noise absorbing functions, such as Schmitt trigger circuits.
2. Implement external circuit countermeasures such as inserting level shifters if the device
is operated at high speeds.
3. See the output high-level voltage items in tables 27.2, 27.14, 27.27, and 27.39 on pages
34 to 35 for the output characteristics. Use values for the pull-up resistors such that the
allowable output current conditions in tables 27.3, 27.15, 27.28, and 27.40 are met.
* This is not present in the H8S/2227 Group and the H8S/2237 Group products.
The H8S/2227 Group and the H8S/2237 Group products do not have an IIC bus, and
the P34 and P35 pin outputs are CMOS outputs (when the P34ODR and P35ODR bits
for the pins are 0).
When using an emulator that includes either an H8S/2633 evaluation chip or an
H8S/2238 evaluation chip, these pins will be NMOS push-pull outputs. Therefore the
pin output characteristics will differ from those in the H8S/2227 Group and the
H8S/2237 Group products. If CMOS output characteristics are required in pins P34 and
P35, pull up the emulator P34 and P35 pins with an appropriate resistor.
• P36
The pin functions are switched as shown below according to the P36DDR bit condition.
P36DDR
Pin functions
Note:
*
0
1
P36 input pin
P36 output pin*
When P36ODR is set to 1, functions as NMOS open drain output.
Rev. 5.00 Aug 08, 2006 page 318 of 982
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Section 10 I/O Ports
• P35/SCK1/SCL0/IRQ5
The pin functions are switched as shown below according to the combination of the ICE bit*3
in ICCR_0 of IIC_0, the C/A bit in SMR_1 of SCI_1, CKE0 and CKE1 bits in SCR_1, and the
P35DDR bit. To use this port as SCL0 I/O pin, clear the C/A bit, CKE1 bit, and CKE0 bit to 0.
The SCL0 functions as NMOS open drain output and the pin can drive bus directly. When this
pin is specified as the P35 output pin or SCK1 output pin, it functions as NMOS push/pull
output.*4
ICE*3
0
CKE1
0
C/A
1
0
1

0


0
0
CKE0
0
1
0
1




P35 input
pin
P35 output
pin*1
SCK1 output
pin*1
SCK1 output
pin*1
SCK1 input
pin
SCL0 I/O
pin*3
P35DDR
Pin functions
1
IRQ5 Input pin*2
Notes: 1. When the P35ODR is set to 1, it functions as NMOS open drain output. When the
4
P35ODR is cleared to 0, it functions as NMOS push/pull output.*
2. When this pin is used as an external interrupt pin, do not specify other functions.
3. Not available in the H8S/2237 Group and H8S/2227 Group.
4. It functions as CMOS output in the H8S/2237 Group and H8S/2227 Group.
• P34/RxD1/SDA0
The pin functions are switched as shown below according to the combination of the ICE bit*2
in ICCR_0 of IIC_0, the RE bit in SCR_1 of SCI_1, and the P34DDR bit. When this pin is
specified as P34 output pin, it functions as NMOS push-pull output.*3 The SDA0 also
functions as NMOS open drain outputs and can drive bus directly.
ICE*2
0
RE
P34DDR
Pin functions
0
1
1

0
1


P34 input pin
P34 output pin*1
RxD1 input pin
SDA0 I/O pin*2
Notes: 1. When P34ODR is set to 1, it functions as NMOS open drain output. When the P34ODR
3
is cleared to 0, it functions as NMOS push/pull output.*
2. Not available in theH8S/2237 Group and H8S/2227 Group.
3. It functions as CMOS output in the H8S/2237 Group and H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 319 of 982
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Section 10 I/O Ports
• P33/TxD1/SCL1
The pin functions are switched as shown below according to the combination of the ICE bit*2
in ICCR_1 of IIC_1, the TE bit in SCR_1 of SCI_1, and the P33DDR bit. SCL1 functions as
NMOS open drain output and can drive bus directly.
ICE*2
0
TE
1
0
P33DDR
Pin functions
1

0
1


P33 input pin
P33 output pin*1
TxD1 output pin*1
SCL1 I/O pin*2
Notes: 1. When P33ODR is set to 1, it functions as NMOS open drain output.
2. Not available in the H8S/2237 Group and H8S/2227 Group.
• P32/SCK0/SDA1/IRQ4
The pin functions are switched as shown below according to the combination of the ICE bit*3
in ICCR_1 of IIC_1, the C/A bit in SMR_0 of SCI_0, CKE1 and CKE0 bits in SCR, and the
P32DDR bit. To use this port as SDA1 input pin, clear the C/A bit, CKE0 bit, and CKE1 bit to
0. The SDA1 functions as NMOS open drain output and can drive bus directly.
ICE*
3
0
CKE1
1
0
C/A
1
0
1

0
1


0
0
CKE0
0
P32DDR
Pin functions
0
1




P32 input
pin
P32 output
pin*1
SCK0 output
pin*1
SCK0 output
pin*1
SCK0 input
pin
SDA1 I/O
pin*3
IRQ4 Input*2
Notes: 1. When P32ODR is set to 1, it functions as NMOS open drain output.
2. When this pin is used as an external interrupt pin, do not specify other functions.
3. Not available in the H8S/2237 Group and H8S/2227 Group.
• P31/RxD0
The pin functions are switched as shown below according to the combination of the RE bit in
SCR_0 of SCI_0 and the P31DDR bit.
RE
0
P31DDR
Pin functions
Note:
*
1
0
1

P31 input pin
P31 output pin*
RxD0 input
When P31ODR is set to 1, it functions as NMOS open drain output.
Rev. 5.00 Aug 08, 2006 page 320 of 982
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Section 10 I/O Ports
• P30/TxD0
The pin functions are switched as shown below according to the combination of the TE bit in
SCR_0 of SCI_0 and the P30DDR bit.
TE
0
P30DDR
Pin functions
Note:
*
10.3
1
0
1

P30 input pin
P30 output pin*
TxD0 output*
When P30ODR is set to 1, it functions as NMOS open drain output.
Port 4
Port 4 is an 8-bit input port and has the following register.
• Port 4 register (PORT4)
10.3.1
Port 4 Register (PORT4)
PORT4 shows port 4 pin states.
Bit
Bit Name
Initial Value
R/W
Description
7
P47
R
6
P46
—*
—*
The pin states are always read when a port 4 read
is performed.
P45
—*
R
P44
—*
R
P43
—*
R
P42
—*
R
1
P41
—*
R
0
P40
—*
R
5
4
3
2
Note:
10.3.2
*
R
Determined by the states of pins P47 to P40.
Pin Functions
Port 4 pins also function as A/D converter analog input pins (AN7 to AN0).
Rev. 5.00 Aug 08, 2006 page 321 of 982
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Section 10 I/O Ports
10.4
Port 7
Port 7 is an 8-bit I/O port and has the following registers.
• Port 7 data direction register (P7DDR)
• Port 7 data register (P7DR)
• Port 7 register (PORT7)
10.4.1
Port 7 Data Direction Register (P7DDR)
P7DDR specifies input or output of the port 7 pins using the individual bits. P7DDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
P77DDR
0
W
6
P76DDR
0
W
5
P75DDR
0
W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port 7
pin an output pin. Clearing this bit to 0 makes the pin
an input pin.
4
P74DDR
0
W
3
P73DDR
0
W
2
P72DDR
0
W
1
P71DDR
0
W
0
P70DDR
0
W
Rev. 5.00 Aug 08, 2006 page 322 of 982
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Section 10 I/O Ports
10.4.2
Port 7 Data Register (P7DR)
P7DR stores output data for port 7 pins.
Bit
Bit Name
Initial Value
R/W
Description
7
P77DR
0
R/W
6
P76DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
P75DR
0
R/W
4
P74DR
0
R/W
3
P73DR
0
R/W
2
P72DR
0
R/W
1
P71DR
0
R/W
0
P70DR
0
R/W
10.4.3
Port 7 Register (PORT7)
PORT7 shows the pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
P77
—*
R
P76
—*
R
P75
—*
R
If a port 1 read is performed while P7DDR bits are set
to 1, the P7DR values are read. If a port 1 read is
performed while P7DDR bits are cleared to 0, the pin
states are read.
4
P74
—*
R
3
P73
—*
R
2
P72
R
1
P71
—*
—*
0
P70
—*
R
7
6
5
Note:
*
R
Determined by the states of pins P77 to P70.
Rev. 5.00 Aug 08, 2006 page 323 of 982
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Section 10 I/O Ports
10.4.4
Pin Functions
Port 7 pins also function as TMR I/O pins (TMR_0, TMR_1, TMR_2*1, and TMR_3*1), bus
control output pin, SCI I/O pins, and DMAC*2 I/O pins. Values of the register and pin functions
are shown below.
Notes: 1. Not available in the H8S/2237 Group and H8S/2227 Group.
2. Supported only by the H8S/2239 Group.
• P77/TxD3
The pin functions are switched as shown below according to the combination of the TE bit in
SCR_3 of SCI_3 and the P77DDR bit.
TE
0
0
1

P77 input pin
P77 output pin
TxD3 output
P77DDR
Pin functions
1
• P76/RxD3
The pin functions are switched as shown below according to the combination of the RE bit in
SCR_3 of SCI_3 and the P76DDR bit.
RE
0
0
1

P76 input pin
P76 output pin
RxD3 Input
P76DDR
Pin functions
1
• P75/TMO3/SCK3
The pin functions are switched as shown below according to the combination of OS3 to OS0
bits in TCSR_3 of TMR_3*, CKE1 and CKE0 bits in SCR_3 of SCI_3, the C/A bit in SMR_3,
and the P75DDR bit.
OS3 to OS0*
All bits are 0
CKE1
1

1


1



0
C/A
0
CKE0
0
P75DDR
Pin functions
Note:
Any bit is 1
*
0
1




P75 input
pin
P75 output
pin
SCK3 output
pin
SCK3 output
pin
SCK3 input
pin
TMO3*
output pin
Not available in the H8S/2237 Group and H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 324 of 982
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Section 10 I/O Ports
• P74/TMO2/MRES
The pin functions are switched as shown below according to the combination of OS3 to OS0
bits in TCSR_2 of TMR_2*, the MRESE bit in SYSCR, and the P74DDR bit.
MRESE
0
OS3 to OS0*

1

0
P74 output pin
TMO2* output
MRES input
0
Pin functions
*
Any bit is 1
All bits are 0
P74DDR
Note:
1
P74 input pin
Not available in the H8S/2237 Group and H8S/2227 Group.
• P73/TMO1/TEND1/CS7
The pin functions are switched as shown below according to the combination of operating
mode, the TEE1 bit in DMATCR of DMAC*, OS3 to OS0 bits in TCSR_1 of TMR_1, and the
P73DDR bit.
Operating
mode
TEE1*
Modes 4 to 6
0
OS3 to OS0
All bits are 0
P73DDR
0
Pin functions
Note:
*
Mode 7
1
CS7
output
pin
P73
input
pin
1
0
Any bit
is 1

All bits are 0


0
TMO1
output
pin
TEND1*
output
pin
P73
input
pin
1
Any bit
is 1

1


P73
output
pin
TMO1
output
pin
TEND1*
output
pin
Supported only by the H8S/2239 Group.
• P72/TMO0/TEND0/CS6
The pin functions are switched as shown below according to the combination of operating
mode the TEE0 bit in DMATCR of DMAC*, OS3 to OS0 bits in TCSR_0 of TMR_0, and the
P72DDR bit.
Operating
mode
TEE0*
Modes 4 to 6
Mode 7
0
1
0
Any bit
is 1

All bits are 0
OS3 to OS0
All bits are 0
P72DDR
0
1



P72
input
pin
CS6
output
pin
TMO0
output
pin
TEND0*
output
pin
P72
input
pin
Pin functions
Note:
*
P72
output
pin
1
Any bit
is 1



TMO0
output
pin
TEND0*
output
pin
Supported only by the H8S/2239 Group.
Rev. 5.00 Aug 08, 2006 page 325 of 982
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Section 10 I/O Ports
• P71/TMRI23/TMCI23/DREQ1/CS5
The pin functions are switched as shown below according to the combination of operating
mode and the P71DDR bit.
Operating
mode
Modes 4 to 6
P71DDR
Pin functions
Mode 7
0
1
P71 input pin
1
TMRI23* ,
1
TMCI23* ,
2
*
DREQ1 input pin
CS5 output pin

0
1
P71 input pin
P71 output pin
1
1
2
TMRI23* , TMCI23* , DREQ1* input
pin
Notes: 1. Not available in the H8S/2237 Group and H8S/2227 Group.
2. Supported only by the H8S/2239 Group.
• P70/TMRI01/TMCI01/DREQ0/CS4
The pin functions are switched as shown below according to the combination of operating
mode and the P70DDR bit.
Operating
mode
Modes 4 to 6
P70DDR
Pin functions
Note:
*
Mode 7
0
1
0
P70 input pin
CS4 output pin
P70 input pin
TMRI01,TMCI01,
DREQ0* input pin

Supported only by the H8S/2239 Group.
Rev. 5.00 Aug 08, 2006 page 326 of 982
REJ09B0054-0500
1
P70 output pin
TMRI01,TMCI01, DREQ0* input pin
Section 10 I/O Ports
10.5
Port 9
Port 9 is a 2-bit input-only port and has the following register.
• Port 9 register (PORT9)
10.5.1
Port 9 Register (PORT9)
PORT9 shows port 9 pin states. This register cannot be modified.
Bit
7
Bit Name
Initial Value
R/W
Description
P97
*
R
The pin states are always read when these bits are
read.
6
P96
5 to 0

*

R
R
Reserved
These bits are always read as undefined value.
Note:
10.5.2
*
Determined by the states of pins P97 and P96.
Pin Functions
Port 9 pins also function as D/A converter analog output pins (DA1 and DA0)*.
Note: * Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 327 of 982
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Section 10 I/O Ports
10.6
Port A
Port A is a 4-bit I/O port and has the following register.
• Port A data direction register (PADDR)
• Port A data register (PADR)
• Port A register (PORTA)
• Port A pull-up MOS control register (PAPCR)
• Port A open drain control register (PAODR)
10.6.1
Port A Data Direction Register (PADDR)
PADDR specifies input or output the port A pins using the individual bits. PADDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7 to 4
—
Undefined
—
Reserved
These bits are always read as undefined value.
3
PA3DDR
0
W
2
PA2DDR
0
W
1
PA1DDR
0
W
0
PA0DDR
0
W
10.6.2
When a pin is specified as a general purpose I/O
port, setting this bit to 1 makes the corresponding
port A pin an output pin. Clearing this bit to 0 makes
the pin an input pin.
Port A Data Register (PADR)
PADR stores output data for port A pins.
Bit
Bit Name
Initial Value
R/W
Description
7 to 4
—
Undefined
—
Reserved
These bits are always read as undefined value.
3
PA3DR
0
R/W
2
PA2DR
0
R/W
1
PA1DR
0
R/W
0
PA0DR
0
R/W
Rev. 5.00 Aug 08, 2006 page 328 of 982
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Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
Section 10 I/O Ports
10.6.3
Port A Register (PORTA)
PORTA shows the pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7 to 4
—
Undefined
—
Reserved
These bits are always read as undefined value.
R
PA2
—*
—*
PA1
—*
R
PA0
—*
R
3
PA3
2
1
0
Note:
10.6.4
*
R
If this bit is read while PADDR is set to 1, the PADR
value is read. If this bit is read while PADDR is
cleared, the PA3 pin states are read.
Determined by the states of PA3 to PA0 pins.
Port A Pull-Up MOS Control Register (PAPCR)
PAPCR controls the on/off state of port A input pull-up MOS.
Bit
Bit Name
Initial Value
R/W
Description
7 to 4
—
Undefined
—
Reserved
These bits are always read as undefined value.
3
PA3PCR
0
R/W
2
PA2PCR
0
R/W
1
PA1PCR
0
R/W
0
PA0PCR
0
R/W
10.6.5
When the pin is specified as an input port, setting the
corresponding bit to 1 turns on the input pull-up MOS
for that pin.
Port A Open Drain Control Register (PAODR)
PAODR selects output state of port A.
Bit
Bit Name
Initial Value
R/W
Description
7 to 4
—
Undefined
—
Reserved
These bits are always read as undefined value.
3
PAODR
0
R/W
2
PAODR
0
R/W
1
PAODR
0
R/W
0
PAODR
0
R/W
When this bit is set to 1, the corresponding port A pin
functions as open drain output. When this bit is
cleared to 0, the corresponding pin functions as
CMOS output.
Rev. 5.00 Aug 08, 2006 page 329 of 982
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Section 10 I/O Ports
10.6.6
Pin Functions
Port A pins also function as an address output pin and SCI_2* I/O pins. The relationship between
the value of register and pin is shown as below.
Note: * Not available in the H8S/2227 Group.
• PA3/A19/SCK2
The pin functions are switched as shown below according to the combination of operating mode,
AE3 to AE0 bits in PFCR, the C/A in SMR_2 of SCI_2*2, CKE1 and CKE0 bits in SCR_2,
and the PA3DDR bit.
Operating mode
AE3 to AE0
Modes 4 to 6
B'11xx
CKE1
2
C/A*

CKE0

PA3DDR

Pin functions
Other than B'11xx
0

A19
output
pin
0
1
—
1
—
—
1
—
—
—
PA3 output
1
pin*
2
SCK2*
output
1
pin*
2
SCK2*
output
1
pin*
SCK2*
input pin
0
0
PA3 input
pin
Operating
mode

CKE1
2
C/A*
0
1
0
CKE0
Pin functions
2
Mode 7
AE3 to AE0
PA3DDR
1
0
0
PA3 input pin
1
1
PA3 output
1
pin*

1




*2
SCK2
1
output pin*
*2
SCK2
1
output pin*

2
SCK2* input
pin
Notes: 1. When PA3ODR in PAODR is set to 1, the corresponding pin functions as NMOS open
drain output.
2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 330 of 982
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Section 10 I/O Ports
• PA2/A18/RxD2
The pin functions are switched as shown below according to the combination of operating
mode, AE3 to AE0 bits in PFCR, the RE bit in SCR_2 of SCI_2*2, and the PA2DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
B'1011
or
B'11xx
RE*
2

PA2DDR

Pin functions
A18
output
pin
Mode 7

Other than (B'1011 or B'11xx)
0
0
PA2
input pin
1
0
1
1

0
1

PA2
output
1
pin*
2
RxD2*
input pin
PA2
input pin
PA2
output
1
pin*
RxD2*
input pin
2
Notes: 1. When PA2ODR in PAODR is set to 1, the corresponding pin functions as NMOS open
drain output.
2. Not available in the H8S/2227 Group.
• PA1/A17/TxD2
The pin functions are switched as shown below according to the combination of operating
mode, AE3 to AE0 bits in PFCR, the TE bit in SCR_2 of SCI_2*2, and the PA1DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
B'101x or
B'11xx
TE*
2

PA1DDR

Pin functions
A17
output pin
Mode 7

Other than (B'101x or B'11xx)
0
0
PA1
input pin
1
0
1
1

0
1

PA1
output
1
pin*
2
TxD2 *
output
1
pin*
PA1
input pin
PA1
output
1
pin*
TxD2 *
output
1
pin*
2
Notes: 1. When PA1ODR in PAODR is set to 1, the corresponding pin functions as NMOS open
drain output.
2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 331 of 982
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Section 10 I/O Ports
• PA0/A16
The pin functions are switched as shown below according to the combination of operating
mode, AE3 to AE0 bits in PFCR and the PA0DDR bit.
Operating
mode
Modes 4 to 6
AE3 to AE0
Other than
Mode 7

B'0xxx or B'1000
(B'0xxx or B'1000)

0
1
0
1
A16 output pin
PA0 input pin
PA0 output
pin*
PA0 input pin
PA0 output
pin*
PA0DDR
Pin functions
Note:
10.6.7
*
When PA0ODR in PAODR is set to 1, the corresponding pin functions as NMOS open
drain output.
Input Pull-Up MOS States in Port A
Port A has a built-in input pull-up MOS function that can be controlled by software. Input pull-up
MOS can be specified as on or off on an individual bit basis.
Table 10.2 summarizes the input pull-up MOS states.
Table 10.2 Input Pull-Up MOS States in Port A
Pin States
Address output,
Port output, SCI
output
Power-on
Reset
Hardware
Standby
Mode
Manual
Reset
Software
Standby
Mode
In Other
Operations
OFF
OFF
OFF
OFF
OFF
ON/OFF
ON/OFF
ON/OFF
Port input, SCI input
Legend:
OFF:
Input pull-up MOS is always off.
ON/OFF: On when PADDR = 0 and PAPCR = 1; otherwise off.
10.7
Port B
Port B is a 8-bit I/O port. Port B has the following registers.
• Port B data direction register (PBDDR)
• Port B data register (PBDR)
• Port B register (PORTB)
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Section 10 I/O Ports
• Port B pull-up MOS control register (PBPCR)
10.7.1
Port B Data Direction Register (PBDDR)
PBDDR specifies input or output the port B pins using the individual bits. PBDDR cannot be read;
if it is, an undefined value will be read. This register is a write-only register, and cannot be written
by bit manipulation instruction. For details, see section 2.9.4, Access Methods for Registers with
Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
PB7DDR
0
W
6
PB6DDR
0
W
5
PB5DDR
0
W
When a pin is specified as a general purpose I/O port,
setting the bit to 1 makes the corresponding port B pin
an output pin. Clearing the bit to 0 makes the pin an
input pin.
4
PB4DDR
0
W
3
PB3DDR
0
W
2
PB2DDR
0
W
1
PB1DDR
0
W
0
PB0DDR
0
W
10.7.2
Port B Data Register (PBDR)
PBDR stores output data for port B pins.
Bit
Bit Name
Initial Value
R/W
Description
7
PB7DR
0
R/W
6
PB6DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
PB5DR
0
R/W
4
PB4DR
0
R/W
3
PB3DR
0
R/W
2
PB2DR
0
R/W
1
PB1DR
0
R/W
0
PB0DR
0
R/W
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Section 10 I/O Ports
10.7.3
Port B Register (PORTB)
PORTB shows the pin states and cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
PB7
R
6
PB6
*
*
PB5
*
R
If these bits are read while the corresponding PBDDR
bits are set to 1, the PBDR value is read. If these bits
are read while PBDDR bits are cleared to 0, the pin
states are read.
PB4
*
R
3
PB3
*
R
2
PB2
R
1
PB1
*
*
0
PB0
*
R
5
4
Note:
10.7.4
*
R
R
Determined by the states of pins PB7 to PB0.
Port B Pull-Up MOS Control Register (PBPCR)
PBPCR controls the on/off state of port B input pull-up MOS.
Bit
Bit Name
Initial Value
R/W
Description
7
PB7PCR
0
R/W
6
PB6PCR
0
R/W
5
PB5PCR
0
R/W
When a pin is specified as an input port, setting the
corresponding bit to 1 turns on the input pull-up
MOS for that pin.
4
PB4PCR
0
R/W
3
PB3PCR
0
R/W
2
PB2PCR
0
R/W
1
PB1PCR
0
R/W
0
PB0PCR
0
R/W
10.7.5
Pin Functions
Port B pins also function as TPU I/O pins (TPU_3*, TPU_4*, and TPU_5*) and address output
pins. The values of register and pin functions are shown bellow.
Note: * Not available in the H8S/2227 Group.
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Section 10 I/O Ports
• PB7/A15/TIOCB5
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 5*3 setting, AE3 to AE0 bits in PFCR, and the PB7DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
B'1xxx

Other than B'1xxx
TPU channel 5
1 3
setting* *

Output
PB7DDR


A15
output
pin
3
TIOCB5*
output pin
Pin functions
Mode 7
Input or initial value
0
PB7
input pin
Output
Input or initial
value
1

0
1
PB7
output
pin
3
TIOCB5*
output pin
PB7
input
pin
PB7
output
pin
TIOCB5* input
2
pin*
TIOCB5* input
2
pin*
3
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCB5 input when TPU channel 5 timer operating mode is set to
normal operating or phase counting mode and IOB3 in TIOR_5 is set to 1.
3. Not available in the H8S/2227 Group.
• PB6/A14/TIOCA5
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 5*3 setting, AE3 to AE0 bits in PFCR, and the PB6DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
B'0111 or
B'1xxx

Other than (B'0111 or B'1xxx)
TPU channel 5
1 3
setting* *

Output
PB6DDR


A14
output pin
3
TIOCA5*
output pin
Pin functions
Mode 7
Input or initial value
0
PB6
input
pin
Input or initial
value
1

0
1
PB6
output
pin
3
TIOCA5*
output pin
PB6
input
pin
PB6
output
pin
TIOCA5* input
2
pin*
3
Output
TIOCA5* input
2
pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCA5 input when TPU channel 5 timer operating mode is set to
normal operating or phase counting mode and IOA3 in TIOR_5 is set to 1.
3. Not available in the H8S/2227 Group.
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Section 10 I/O Ports
• PB5/A13/TIOCB4
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 4*3 setting, AE3 to AE0 bits in PFCR, and the PB5DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
B'011x or
B'1xxx

Other than (B'011x or B'1xxx)
TPU channel 4
1 3
setting* *

Output
PB5DDR


A13
output pin
3
TIOCB4*
output pin
Pin functions
Mode 7
Input or initial value
0
PB5
input
pin
Output
Input or initial
value
1

0
1
PB5
output
pin
3
TIOCB4*
output pin
PB5
input
pin
PB5
output
pin
TIOCB4* input
2
pin*
TIOCB4* input
2
pin*
3
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCB4 input when TPU channel 4 timer operating mode is set to
normal operating or phase counting mode and IOB3 to IOB0 in TIOR_4 are set to 10xx.
3. Not available in the H8S/2227 Group.
• PB4/A12/TIOCA4
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 4*3 setting, AE3 to AE0 bits in PFCR, and the PB4DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
TPU channel 4
1 3
setting* *

Output
PB4DDR


Pin functions
A12
output pin
Mode 7

B'0100 or B'00xx
Other than
(B'0100 or
B'00xx)
Input or initial value
0
*3
TIOCA4
output pin
1
PB4
input
pin
PB4
output
pin
TIOCA4* input
2
pin*
3
Output

*3
TIOCA4
output pin
Input or initial
value
0
1
PB4
input
pin
PB4
output
pin
TIOCA4* input
2
pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCA4 input when TPU channel 4 timer operating mode is set to
normal operating or phase counting mode and IOA3 to IOA0 in TIOR_4 are set to 10xx.
3. Not available in the H8S/2227 Group.
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Section 10 I/O Ports
• PB3/A11/TIOCD3
The pin function is switched as shown below according to combination of the operating mode,
the TPU channel 3*3 setting, AE3 to AE0 bits in PFCR, and the PB3DDR bit.
Operating
mode
AE3 to AE0
Modes 4 to 6
Other than
B'00xx

B'00xx
TPU channel 3
1 3
setting* *

Output
PB3DDR


A11 output
pin
3
TIOCD3*
output pin
Pin functions
Mode 7
Input or initial value
Input or initial
value
1

0
1
PB3
output
pin
3
TIOCD3*
output pin
PB3
input
pin
PB3
output
pin
0
PB3
input pin
Output
TIOCD3* input
2
pin*
TIOCD3* input
2
pin*
3
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCD3 input when TPU channel 3 timer operating mode is set to
normal operating and IOD3 to IOD0 in TIORL_3 are set to 10xx.
3. Not available in the H8S/2227 Group.
• PB2/A10/TIOCC3
The pin functions are switched as shown below according to the combination of operating
mode, the TPU channel 3*3 setting, AE3 to AE0 bits in PFCR, and the PB2DDR bit.
Operating mode
AE3 to AE0
Modes 4 to 6
Other than
(B'0010 or
B'000x)

B'0010 or B'000x
TPU channel 3
1 3
setting* *

Output
PB2DDR


A10 output
pin
3
TIOCC3*
output pin
Pin functions
Mode 7
Input or initial
value
0
PB2
input
pin
Input or initial
value
1

0
1
PB2
output
pin
3
TIOCC3*
output pin
PB2
input
pin
PB2
output
pin
TIOCC3* input
2
pin*
3
Output
TIOCC3* input
2
pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCC3 input when TPU channel 3 timer operating mode is set to
normal operating mode and IOC3 to IOC0 in TIORL_3 are set to 10xx.
3. Not available in the H8S/2227 Group.
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Section 10 I/O Ports
• PB1/A9/TIOCB3
The pin functions are switched as shown below according to the combination of operating mode,
the TPU channel 3*3 setting, AE3 to AE0 bits in PFCR, and the PB1DDR bit.
Operating mode
AE3 to AE0
Modes 4 to 6
Other than
B'000x

B'000x
TPU channel 3
1 3
setting* *

Output
PB1DDR


A9 output
pin
3
TIOCB3*
output pin
Pin functions
Mode 7
Input or initial
value
0
PB1
input
pin
Output
Input or initial
value
1

0
1
PB1
output
pin
3
TIOCB3*
output pin
PB1
input
pin
PB1
output
pin
TIOCB3* input
2
pin*
TIOCB3* input
2
pin*
3
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCB3 input when TPU channel 3 timer operating mode is set to
normal operating mode and IOB3 to IOB0 in TIORH_3 are set to 10xx.
3. Not available in the H8S/2227 Group.
• PB0/A8/TIOCA3
The pin functions are switched as shown below according to the combination of the operating
mode, TPU channel 3*3 setting, the AE3 to AE0 bits in PFCR, and the PB0DDR bit.
Operating mode
AE3 to AE0
Modes 4 to 6
Other than
B'0000

Output
PB0DDR


A8 output
pin

B'0000
TPU channel 3
1 3
setting* *
Pin functions
Mode 7
Input or initial
value
0
*3
TIOCA3
output pin
1
PB0
input
pin
PB0
output
pin
TIOCA3* input
2
pin*
3
Output

*3
TIOCA3
output pin
Input or initial
value
0
1
PB0
input
pin
PB0
output
pin
TIOCA3* input
2
pin*
3
Notes: 1. For the setting of the TPU channel, see section 11, 16-Bit Timer Pulse Unit (TPU).
2. This pin functions as TIOCA3 input when TPU channel 3 timer operating mode is set to
normal operating mode and IOA3 to IOA0 in TIORH_3 are set to 10xx.
3. Not available in the H8S/2227 Group.
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Section 10 I/O Ports
10.7.6
Input Pull-Up MOS States in Port B
Port B has a built-in input pull-up MOS function that can be controlled by software. Input pull-up
MOS can be specified as on or off on an individual bit basis.
Table 10.3 summarizes the input pull-up MOS states.
Table 10.3 Input Pull-Up MOS States in Port B
Pin States
Address output,
Port output, TPU
output
Power-on
Reset
Hardware
Standby
Mode
Manual
Reset
Software
Standby
Mode
In Other
Operations
OFF
OFF
OFF
OFF
OFF
ON/OFF
ON/OFF
ON/OFF
Port input, TPU
input
Legend:
OFF:
Input pull-up MOS is always off.
ON/OFF: On when PBDDR = 0 and PBPCR = 1; otherwise off.
10.8
Port C
Port C is an 8-bit I/O port and has the following registers.
• Port C data direction register (PCDDR)
• Port C data register (PCDR)
• Port C register (PORTC)
• Port C pull-up MOS control register (PCPCR)
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Section 10 I/O Ports
10.8.1
Port C Data Direction Register (PCDDR)
PCDDR specifies input or output the port C pins using the individual bits. PCDDR cannot be read;
if it is, an undefined value will be read. This register is a write-only register, and cannot be written
by bit manipulation instruction. For details, see section 2.9.4, Access Methods for Registers with
Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
PC7DDR
0
W
6
PC6DDR
0
W
5
PC5DDR
0
W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port C
pin an output pin. Clearing this bit to 0 makes the pin
an input pin.
4
PC4DDR
0
W
3
PC3DDR
0
W
2
PC2DDR
0
W
1
PC1DDR
0
W
0
PC0DDR
0
W
10.8.2
Port C Data Register (PCDR)
PCDR stores output data for port C pins.
Bit
Bit Name
Initial Value
R/W
Description
7
PC7DR
0
R/W
6
PC6DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
PC5DR
0
R/W
4
PC4DR
0
R/W
3
PC3DR
0
R/W
2
PC2DR
0
R/W
1
PC1DR
0
R/W
0
PC0DR
0
R/W
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Section 10 I/O Ports
10.8.3
Port C Register (PORTC)
PORTC shows port C pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
PC7
*
R
6
PC6
R
5
PC5
*
*
If a port C read is performed while PCDDR bits are
set to 1, the PCDR values are read. If a port C read is
performed while PCDDR bits are cleared to 0, the pin
states are read.
4
PC4
*
R
3
PC3
R
2
PC2
*
*
PC1
*
R
PC0
*
R
1
0
Note:
10.8.4
*
R
R
Determined by the states of pins PC7 to PC0.
Port C Pull-Up MOS Control Register (PCPCR)
PCPCR controls the input pull-up MOS specification as on or off for port C.
Bit
Bit Name
Initial Value
R/W
Description
7
PC7PCR
0
R/W
6
PC6PCR
0
R/W
5
PC5PCR
0
R/W
When a pin is specified as an input port, setting the
corresponding bit to 1 turns on the input pull-up MOS
for that pin.
4
PC4PCR
0
R/W
3
PC3PCR
0
R/W
2
PC2PCR
0
R/W
1
PC1PCR
0
R/W
0
PC0PCR
0
R/W
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Section 10 I/O Ports
10.8.5
Pin Functions
Port C pins also function as address output pin. The values of register and pin functions are shown
below.
• PC7/A7, PC6/A6, PC5/A5, PC4/A4, PC3/A3, PC2/A2, PC1/A1, PC0/A0
The pin functions are switched as shown below according to the combination of operating
mode and the PCnDDR bit.
Operating
mode
Modes 4 and 5
PCnDDR

0
1
0
1
Address output
pin
PCn input
pin
Address
output pin
PCn input pin
PCn output
pin
Pin functions
Mode 6
Mode 7
Note: n = 7 to 0
10.8.6
Input Pull-Up MOS States in Port C
Port C has a built-in input pull-up MOS function that can be controlled by software. Input pull-up
MOS can be used in modes 6 and 7 and specified as on or off on an individual bit basis.
Table 10.4 summarizes the input pull-up MOS states in port C.
Table 10.4 Input Pull-Up MOS States in Port C
Pin States
Address output (modes 4
and 5) and port output
(modes 6 and 7)
Power-on
Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
OFF
OFF
OFF
OFF
ON/OFF
ON/OFF
Port input (modes 6 and 7)
Legend:
OFF:
Input pull-up MOS is always off.
ON/OFF: On when PCDDR = 0 and PCPCR = 1; otherwise off.
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Section 10 I/O Ports
10.9
Port D
Port D is an 8-bit I/O port and has the following registers.
• Port D data direction register (PDDDR)
• Port D data register (PDDR)
• Port D register (PORTD)
• Port D pull-up MOS control register (PDPCR)
10.9.1
Port D Data Direction Register (PDDDR)
PDDDR specifies input or output the port D pins using the individual bits. PDDDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
PD7DDR
0
W
6
PD6DDR
0
W
5
PD5DDR
0
W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port D
pin an output port. Clearing this bit to 0 makes the pin
an input port.
4
PD4DDR
0
W
3
PD3DDR
0
W
2
PD2DDR
0
W
1
PD1DDR
0
W
0
PD0DDR
0
W
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Section 10 I/O Ports
10.9.2
Port D Data Register (PDDR)
PDDR stores output data for port D pins.
Bit
Bit Name
Initial Value
R/W
Description
7
PD7DR
0
R/W
6
PD6DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
PD5DR
0
R/W
4
PD4DR
0
R/W
3
PD3DR
0
R/W
2
PD2DR
0
R/W
1
PD1DR
0
R/W
0
PD0DR
0
R/W
10.9.3
Port D Register (PORTD)
PORTD shows port D pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
PD7
*
R
PD6
*
R
PD5
*
R
If a port D read is performed while PDDDR bits are
set to 1, the PDDR values are read. If a port D read is
performed while PDDDR bits are cleared to 0, the pin
states are read.
4
PD4
*
R
3
PD3
*
R
2
PD2
R
1
PD1
*
*
0
PD0
*
R
7
6
5
Note:
*
R
Determined by the states of pins PD7 to PD0.
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Section 10 I/O Ports
10.9.4
Port D Pull-Up MOS Control Register (PDPCR)
PDPCR controls the on/off state of port D input pull-up MOS.
Bit
Bit Name
Initial Value
R/W
Description
7
PD7PCR
0
R/W
6
PD6PCR
0
R/W
5
PD5PCR
0
R/W
When a pin is specified as an input port, setting the
corresponding bit to 1 turns on the input pull-up MOS
for that pin.
4
PD4PCR
0
R/W
3
PD3PCR
0
R/W
2
PD2PCR
0
R/W
1
PD1PCR
0
R/W
0
PD0PCR
0
R/W
10.9.5
Pin Functions
Port D pins also function as data I/O pins. The values of register and pin functions are shown
below.
• PD7/D15, PD6/D14, PD5/D13, PD4/D12, PD3/D11, PD2/D10, PD1/D9, PD0/D8
The pin functions are switched as shown below according to the combination of the operating
mode and the PDnDDR bit.
Operating mode
PDnDDR
Pin functions
Modes 4 to 6
Mode 7

0
1
Data I/O pin
PDn input pin
PDn output pin
Note: n = 7 to 0
Rev. 5.00 Aug 08, 2006 page 345 of 982
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Section 10 I/O Ports
10.9.6
Input Pull-Up MOS States in Port D
Port D has a built-in input pull-up MOS function that can be controlled by software. Input pull-up
MOS can be used in mode 7 and specified as on or off on an individual bit basis.
Table 10.5 summarizes the input pull-up MOS states in port D.
Table 10.5 Input Pull-Up MOS States in Port D
Pin States
Power-on
Reset
Data I/O (modes 4 to 6) and OFF
port output (mode 7)
Hardware
Standby
Mode
Manual
Reset
Software
Standby
Mode
In Other
Operations
OFF
OFF
OFF
OFF
ON/OFF
ON/OFF
ON/OFF
Port input (mode 7)
Legend:
OFF:
Input pull-up MOS is always off.
ON/OFF: On when PDDDR = 0 and PDPCR = 1; otherwise off.
10.10
Port E
Port E is an 8-bit I/O port and has the following registers.
• Port E data direction register (PEDDR)
• Port E data register (PEDR)
• Port E register (PORTE)
• Port E pull-up MOS control register (PEPCR)
Rev. 5.00 Aug 08, 2006 page 346 of 982
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Section 10 I/O Ports
10.10.1
Port E Data Direction Register (PEDDR)
PEDDR specifies input or output of the port E pins using the individual bits. PEDDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
PE7DDR
0
W
6
PE6DDR
0
W
5
PE5DDR
0
W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port E
pin an output port. Clearing this bit to 0 makes the pin
an input port.
4
PE4DDR
0
W
3
PE3DDR
0
W
2
PE2DDR
0
W
1
PE1DDR
0
W
0
PE0DDR
0
W
10.10.2 Port E Data Register (PEDR)
PEDR stores output data for port E pins.
PEDR stores output data for port E pins.
Bit
Bit Name
Initial Value
R/W
Description
7
PE7DR
0
R/W
6
PE6DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
PE5DR
0
R/W
4
PE4DR
0
R/W
3
PE3DR
0
R/W
2
PE2DR
0
R/W
1
PE1DR
0
R/W
0
PE0DR
0
R/W
Rev. 5.00 Aug 08, 2006 page 347 of 982
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Section 10 I/O Ports
10.10.3
Port E Register (PORTE)
PORTE shows port E pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
PE7
*
R
6
PE6
R
5
PE5
*
*
If a port E read is performed while PEDDR bits are set
to 1, the PEDR values are read. If a port E read is
performed while PEDDR bits are cleared to 0, the pin
states are read.
4
PE4
*
R
3
PE3
R
2
PE2
*
*
PE1
*
R
PE0
*
R
1
0
Note:
*
R
R
Determined by the states of pins PE7 to PE0.
10.10.4 Port E Pull-Up MOS Control Register (PEPCR)
PEPCR controls the on/off state of port E input pull-up MOS.
Bit
Bit Name
Initial Value
R/W
Description
7
PE7PCR
0
R/W
6
PE6PCR
0
R/W
5
PE5PCR
0
R/W
When a pin is specified as an input port, setting the
corresponding bit to 1 turns on the input pull-up MOS
for that pin.
4
PE4PCR
0
R/W
3
PE3PCR
0
R/W
2
PE2PCR
0
R/W
1
PE1PCR
0
R/W
0
PE0PCR
0
R/W
Rev. 5.00 Aug 08, 2006 page 348 of 982
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Section 10 I/O Ports
10.10.5
Pin Functions
Port E pins also function as data I/O pins. The values of register and pin functions are shown
below.
• PE7/D7, PE6/D6, PE5/D5, PE4/D4, PE3/D3, PE2/D2, PE1/D1, PE0/D0
The pin functions are switched as shown below according to the combination of the operating
mode, bus mode, and the PEnDDR bit.
Operating
mode
Modes 4 to 6
Bus mode
PEnDDR
Pin functions
Mode 7
8-bit bus mode

16-bit bus
mode
0
1

0
1
PEn input pin
PEn output
pin
Data I/O pin
PEn input pin
PEn output
pin
Note: n = 7 to 0
10.10.6 Input Pull-Up MOS States in Port E
Port E has a built-in input pull-up MOS function that can be controlled by software. Input pull-up
MOS can be used in modes 4 to 6 and 8-bit bus mode or in mode 7 and specified as on or off on an
individual bit basis.
Table 10.6 summarizes the input pull-up MOS states in port E.
Table 10.6 Input Pull-Up MOS States in Port E
Pin States
Power-on
Reset
Data I/O (16-bit bus in
OFF
modes 4 to 6) and port
output (8-bit bus in modes 4
to 6, and mode 7)
Port input (8-bit bus in
modes 4 to 6, and mode 7)
Hardware
Standby
Mode
Manual
Reset
Software
Standby
Mode
In Other
Operations
OFF
OFF
OFF
OFF
ON/OFF
ON/OFF
ON/OFF
Legend:
OFF:
Input pull-up MOS is always off.
ON/OFF: On when PEDDR = 0 and PEPCR = 1; otherwise off.
Rev. 5.00 Aug 08, 2006 page 349 of 982
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Section 10 I/O Ports
10.11
Port F
Port F is an 8-bit I/O port and has the following registers.
• Port F data direction register (PFDDR)
• Port F data register (PFDR)
• Port F register (PORTF)
10.11.1 Port F Data Direction Register (PFDDR)
PFDDR specifies input or output of the port F pins using the individual bits. PFDDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial Value
R/W
Description
7
PF7DDR
0/1*
W
6
PF6DDR
0
W
5
PF5DDR
0
W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port F
pin an output port. Clearing this bit to 0 makes the pin
an input port.
4
PF4DDR
0
W
3
PF3DDR
0
W
2
PF2DDR
0
W
1
PF1DDR
0
W
PF0DDR
0
W
0
Note:
*
In modes 4 to 6, initial value is 1. In mode 7, initial value is 0.
Rev. 5.00 Aug 08, 2006 page 350 of 982
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Section 10 I/O Ports
10.11.2
Port F Data Register (PFDR)
PFDR stores output data for port F pins.
PFDR stores output data for port F pins.
Bit
Bit Name
Initial Value
R/W
Description
7
PF7DR
0
R/W
6
PF6DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
5
PF5DR
0
R/W
4
PF4DR
0
R/W
3
PF3DR
0
R/W
2
PF2DR
0
R/W
1
PF1DR
0
R/W
0
PF0DR
0
R/W
10.11.3 Port F Register (PORTF)
PORTF shows port F pin states. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
PF7
*
R
6
PF6
*
R
5
PF5
R
4
PF4
*
*
If a port F read is performed while PFDDR bits are set
to 1, the PFDR values are read. If a port F read is
performed while PFDDR bits are cleared to 0, the pin
states are read.
3
PF3
R
2
PF2
*
*
PF1
*
R
PF0
*
R
7
1
0
Note:
*
R
R
Determined by the states of pins PF7 to PF0.
Rev. 5.00 Aug 08, 2006 page 351 of 982
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Section 10 I/O Ports
10.11.4
Pin Functions
Port F pins also function as bus control signal input/output pin, interrupt input pin, system clock
output pin, A/D trigger input pin, and BUZZ output pin. The values of register and pin functions
are shown below.
• PF7/φ
The pin functions are switched as shown below according to the PF7DDR bit.
PF7DDR
Pin functions
0
1
PF7 input pin
φ output pin
• PF6/AS
The pin functions are switched as shown below according to the combination of operating
mode and the PF6DDR bit.
Operating
mode
Modes 4 to 6
PF6DDR

0
1
AS output pin
PF6 input pin
PF6 output pin
Pin functions
Mode 7
• PF5/RD
The pin functions are switched as shown below according to the combination of operating
mode and the PF5DDR bit.
Operating mode
PF5DDR
Pin functions
Modes 4 to 6
Mode 7

0
1
RD output pin
PF5 input pin
PF5 output pin
• PF4/HWR
The pin functions are switched as shown below according to the combination of operating
mode and the PF4DDR bit.
Operating mode
PF4DDR
Pin functions
Modes 4 to 6
Mode 7

0
1
HWR output pin
PF4 input pin
PF4 output pin
Rev. 5.00 Aug 08, 2006 page 352 of 982
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Section 10 I/O Ports
• PF3/LWR/ADTRG/IRQ3
The pin functions are switched as shown below according to the combination of operating
mode and the PF3DDR bit.
Operating mode
Modes 4 to 6
Mode 7

Bus mode
16-bit bus
mode
PF3DDR

0
1
0
1
LWR output
pin
PF3 input pin
PF3 output
pin
PF3 input pin
PF3 output
pin
Pin functions
8-bit bus mode
ADTRG input pin*
2
IRQ3 input pin*
1
Notes: 1. When TRGS0 and TRGS1 are set to 1, this pin is ADTRG input.
2. When this pin is used as an external interrupt pin, do not specify other functions.
• PF2/WAIT
The pin functions are switched as shown below according to the combination of operating
mode, the WAITE bit, and the PF2DDR bit.
Operating mode
Modes 4 to 6
WAITE
Mode 7
0
0
1

0
1
PF2 input pin
PF2 output
pin
WAIT input
pin
PF2 input pin
PF2 output
pin
PF2DDR
Pin functions

1
• PF1/BACK/BUZZ
The pin functions are switched as shown below according to the combination of operating
mode, the BUZZ bit in PFCR, and the PF1DDR bit.
Operating
mode
Modes 4 to 6
BRLE
0
BUZZE
0
PF1DDR
0
Pin
functions
PF1
input pin
1
PF1
output
pin
Mode 7

1
1



BUZZ
output
pin
BACK
output
pin
0
0
PF1
input pin
1
1
PF1
output
pin

BUZZ
output pin
Rev. 5.00 Aug 08, 2006 page 353 of 982
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Section 10 I/O Ports
• PF0/BREQ/IRQ2
The pin functions are switched as shown below according to the combination of operating
mode, the BRLE bit, and the PF0DDR bit.
Operating mode
Modes 4 to 6
BRLE
Mode 7
0
0
1

0
1
PF0 input pin
PF0 output
pin
BREQ input
pin
PF0 input pin
PF0 output
pin
PF0DDR
Pin functions

1
IRQ2 input pin*
Note:
When this pin is used as an external interrupt pin, do not specify other functions.
*
10.12
Port G
Port G is a 5-bit I/O port and has the following registers.
• Port G data direction register (PGDDR)
• Port G data register (PGDR)
• Port G register (PORTG)
10.12.1 Port G Data Direction Register (PGDDR)
PGDDR specifies input or output of the port G pins using the individual bits. PGDDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit
Bit Name
Initial
Value
R/W
Description
7 to
5

Undefined

Reserved
4
PG4DDR
0/1*
W
3
PG3DDR
0
W
2
PG2DDR
0
W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port G
pin an output port. Clearing this bit to 0 makes the pin
an input port.
1
PG1DDR
0
W
0
PG0DDR
0
W
Note:
These bits are always read as undefined value.
*
In modes 4 and 5, initial value is 1. In modes 6 and 7, initial value is 0.
Rev. 5.00 Aug 08, 2006 page 354 of 982
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Section 10 I/O Ports
10.12.2 Port G Data Register (PGDR)
PGDR stores output data for port G pins.
Bit
Bit Name
Initial
Value
R/W
Description
7 to
5

Undefined

Reserved
4
PG4DR
0
R/W
3
PG3DR
0
R/W
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
2
PG2DR
0
R/W
1
PG1DR
0
R/W
0
PG0DR
0
R/W
These bits are always read as undefined value.
10.12.3 Port G Register (PORTG)
PORTG shows port G pin states. This register cannot be modified.
Bit
Bit Name
Initial
Value
R/W
Description
7 to
5

Undefined

Reserved
4
PG4
*
R
3
PG3
*
R
2
PG2
R
1
PG1
*
*
0
PG0
*
R
Note:
These bits are always read as undefined value.
*
If a port G read is performed while PGDDR bits are
set to 1, the PGDR values are read. If a port G read is
performed while PGDDR bits are cleared to 0, the pin
states are read.
R
Determined by the states of pins PG4 to PG0.
10.12.4 Pin Functions
Port G pins also function as IEB* input/output pin, bus control signal input/output pin, and
interrupt input pin. The values of registers and pin functions are shown below.
Note: * Supported only by the H8S/2258 Group.
Rev. 5.00 Aug 08, 2006 page 355 of 982
REJ09B0054-0500
Section 10 I/O Ports
• PG4/CS0
The pin functions are switched as shown below according to the combination of operating
mode and the PG4DDR bit.
Operating
mode
Modes 4 to 6
PG4DDR
Pin functions
Mode 7
0
1
0
1
PG4 input pin
CS0 output pin
PG4 input pin
PG4 output pin
• PG3/Rx/CS1
The pin functions are switched as shown below according to the combination of the IEE bit in
IECTR of IEB*, operating mode, and the PG3DDR bit.
IEE*
0
Operating
mode
Modes 4 to 6
PG3DDR
Pin functions
Note:
*
1

Mode 7
0
1
0
1

PG3 input pin
CS1
output pin
PG3 input pin
PG3
output pin
Rx input pin*
Supported only by the H8S/2258 Group.
• PG2/Tx/CS2
The pin functions are switched as shown below according to the combination of the IEE bit in
IECTR of IEB*, operating mode, and the PG2DDR bit.
IEE*
0
Operating
mode
Modes 4 to 6
PG2DDR
Pin functions
Note:
*
1

Mode 7
0
1
0
1

PG2 input pin
CS2
output pin
PG2 input pin
PG2
output pin
Tx input pin*
Supported only by the H8S/2258 Group.
Rev. 5.00 Aug 08, 2006 page 356 of 982
REJ09B0054-0500
Section 10 I/O Ports
• PG1/CS3/IRQ7
The pin functions are switched as shown below according to the combination of operating
mode and the PG1DDR bit.
Operating
mode
Modes 4 to 6
PG1DDR
Pin functions
Note:
*
Mode 7
0
1
PG1 input pin
CS3 output pin
0
1
PG1 input pin
IRQ7 input pin*
PG1 output pin
When this pin is used as an external interrupt pin, do not specify other functions.
• PG0/IRQ6
The pin functions are switched as shown below according to the PG0DDR bit.
PG0DDR
0
Pin functions
1
PG0 input pin
PG0 output pin
IRQ6 input pin*
Note:
*
When this pin is use as an external interrupt pin, do not specify other functions.
Rev. 5.00 Aug 08, 2006 page 357 of 982
REJ09B0054-0500
Section 10 I/O Ports
Rev. 5.00 Aug 08, 2006 page 358 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Section 11 16-Bit Timer Pulse Unit (TPU)
This LSI has an on-chip 16-bit timer pulse unit (TPU) that comprises three 16-bit timer channels
or six 16-bit timer channels. The function list of the 16-bit timer unit and its block diagram are
shown in table 11.1 and figure 11.1, respectively.
11.1
Features
• The number of channels
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, and H8S/2237 Group: Six channels
(channels 0, 1, 2, 3, 4, and 5)
H8S/2227 Group: three channels (channels 0, 1, and 2)
• Pulse input/output
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, and H8S/2237 Group: Maximum of 16pulse input/output
H8S/2227 Group: Maximum of eight-pulse input/output
• Selection of 8 counter input clocks for each channel
• The following operations can be set for each channel:
Waveform output at compare match
Input capture function
Counter clear operation
Synchronous operations:
 Multiple timer counters (TCNT) can be written to simultaneously
 Simultaneous clearing by compare match and input capture possible
 Register simultaneous input/output possible by counter synchronous operation
Maximum of 15-phase PWM output possible by combination with synchronous operation
• Buffer operation settable for channels 0 and 3
• Phase counting mode settable independently for each of channels 1, 2, 4, and 5
• Cascaded operation*
• Fast access via internal 16-bit bus
• 26 interrupt sources
• Automatic transfer of register data
• A/D converter conversion start trigger can be generated
• Module stop mode can be set
Note: * Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 359 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.1 TPU Functions
Item
Channel 0
Channel 1
Channel 2
Channel 3*1 Channel 4*1 Channel 5*1
Count clock
φ/1
φ/4
φ/16
φ/64
TCLKA
TCLKB
TCLKC
TCLKD
φ/1
φ/4
φ/16
φ/64
φ/256
TCLKA
TCLKB
φ/1
φ/4
φ/16
φ/64
φ/1024
TCLKA
TCLKB
TCLKC
φ/1
φ/4
φ/16
φ/64
φ/256
φ/1024
φ/4096
TCLKA
φ/1
φ/4
φ/16
φ/64
φ/1024
TCLKA
TCLKC
φ/1
φ/4
φ/16
φ/64
φ/256
TCLKA
TCLKC
TCLKD
General registers
(TGR)
TGRA_0
TGRB_0
TGRA_1
TGRB_1
TGRA_2
TGRB_2
TGRA_3
TGRB_3
TGRA_4
TGRB_4
TGRA_5
TGRB_5
General registers/
buffer registers
TGRC_0
TGRD_0
—
—
TGRC_3
TGRD_3
—
—
I/O pins
TIOCA0
TIOCB0
TIOCC0
TIOCD0
TIOCA1
TIOCB1
TIOCA2
TIOCB2
TIOCA3
TIOCB3
TIOCC3
TIOCD3
TIOCA4
TIOCB4
TIOCA5
TIOCB5
Counter clear
function
TGR
compare
match or
input
capture
TGR
compare
match or
input
capture
TGR
compare
match or
input
capture
TGR
compare
match or
input
capture
TGR
compare
match or
input
capture
TGR
compare
match or
input
capture
Compare 0 output
match
1 output
output
Toggle
output
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Input capture
function
O
O
O
O
O
O
Synchronous
operation
O
O
O
O
O
O
PWM mode
O
O
O
O
O
O
Phase counting
mode
—
O
O
—
O
O
Buffer operation
O
—
—
O
—
—
Rev. 5.00 Aug 08, 2006 page 360 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Item
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
DTC
TGR
activation compare
match or
input capture
2
TGRA_0
DMAC*
activation compare
match or
input capture
TGR
compare
match or
input capture
TGR
compare
match or
input capture
TGR
compare
match or
input capture
TGR
compare
match or
input capture
TGR
compare
match or
input capture
TGRA_1
compare
match or
input capture
TGRA_2
compare
match or
input capture
TGRA_3
compare
match or
input capture
TGRA_4
compare
match or
input capture
TGRA_5
compare
match or
input capture
A/D
TGRA_0
converter compare
trigger
match or
input capture
TGRA_1
compare
match or
input capture
TGRA_2
compare
match or
input capture
TGRA_3
compare
match or
input capture
TGRA_4
compare
match or
input capture
TGRA_5
compare
match or
input capture
Interrupt
sources
4 sources
4 sources
5 sources
4 sources
4 sources
5 sources
• Compare
• Compare
• Compare
• Compare
• Compare
• Compare
match or
match or
match or
match or
match or
match or
input
input
input
input
input
input
capture 0A
capture 1A
capture 2A
capture 3A
capture 4A
capture 5A
• Compare
• Compare
• Compare
• Compare
• Compare
• Compare
match or
match or
match or
match or
match or
match or
input
input
input
input
input
input
capture 0B
capture 1B
capture 2B
capture 3B
capture 4B
capture 5B
• Compare
match or
input
capture 0C
• Compare
match or
input
capture 3C
• Compare
match or
input
capture 0D
• Compare
match or
input
capture 3D
• Overflow
• Overflow
• Overflow
• Overflow
• Overflow
• Overflow
• Underflow
• Underflow
• Underflow
• Underflow
Legend:
O: Possible
: Not possible
Notes: 1. Not available in the H8S/2227 Group.
2. Supported only by the H8S/2239 Group.
Rev. 5.00 Aug 08, 2006 page 361 of 982
REJ09B0054-0500
Legend:
TSTR:
TSYR:
TCR:
TMDR:
TIOR (H, L):
TCNT
TGRA
TGRB
TGRC
TGRD
TCNT
TGRA
TGRB
Interrupt request signals
Channel 3: TGI3A
TGI3B
TGI3C
TGI3D
TCI3V
Channel 4: TGI4A
TGI4B
TCI4V
TCI4U
Channel 5: TGI5A
TGI5B
TCI5V
TCI5U
Internal data bus
A/D conversion start request signal
TCNT
TGRA
TGRB
TCNT
TGRA
TGRB
Bus interface
TCNT
TGRA
TGRB
TIER:
TSR:
TGR (A, B, C, D) :
TCNT:
TCNT
TGRA
TGRB
TGRC
TGRD
TSTR TSYR
Module data bus
Channel 3
Channel 4
TCR TMDR
TIOR
TIER TSR
Channel 5
TCR TMDR
TIOR
TIER TSR
Control logic
Common
TCR TMDR
TIOR
TIER TSR
Channel 1
TCR TMDR
TIOR
TIER TSR
Channel 0
Channel 2
Timer start register
Timer synchronous register
Timer control register
Timer mode register
Timer I/O control registers (H, L)
TCR TMDR
TIORH TIORL
TIER TSR
Input/output pins
Channel 0: TIOCA0
TIOCB0
TIOCC0
TIOCD0
Channel 1: TIOCA1
TIOCB1
Channel 2: TIOCA2
TIOCB2
Control logic for channels 3 to 5
Clock input
Internal clock: φ/1
φ/4
φ/16
φ/64
φ/256
φ/1024
φ/4096
External clock: TCLKA
TCLKB
TCLKC
TCLKD
Control logic for channels 0 to 2
Input/output pins
Channel 3: TIOCA3
TIOCB3
TIOCC3
TIOCD3
Channel 4: TIOCA4
TIOCB4
Channel 5: TIOCA5
TIOCB5
TCR TMDR
TIORH TIORL
TIER TSR
Section 11 16-Bit Timer Pulse Unit (TPU)
Interrupt request signals
Channel 0: TGI0A
TGI0B
TGI0C
TGI0D
TCI0V
Channel 1: TGI1A
TGI1B
TCI1V
TCI1U
Channel 2: TGI2A
TGI2B
TCI2V
TCI2U
Timer interrupt enable register
Timer status register
Timer general registers (A, B, C, D)
Timer counter
Figure 11.1 Block Diagram of TPU
(H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, and H8S/2237 Group)
Rev. 5.00 Aug 08, 2006 page 362 of 982
REJ09B0054-0500
Internal data bus
A/D conversion start request signal
TCNT
TGRA
TGRB
TCNT
TGRA
TGRB
TGRC
TGRD
Module data bus
TCNT
TGRA
TGRB
Bus interface
TSTR TSYR
Common
Channel 1
TCR TMDR
TIOR
TIER TSR
Channel 0
TCR TMDR
TIORH TIORL
TIER TSR
Channel 2
Legend:
TSTR:
TSYR:
TCR:
TMDR:
TIOR (H, L):
Control logic for channels 0 to 2
Input/output pins
Channel 0: TIOCA0
TIOCB0
TIOCC0
TIOCD0
Channel 1: TIOCA1
TIOCB1
Channel 2: TIOCA2
TIOCB2
TCR TMDR
TIOR
TIER TSR
Clock input
Internal clock: φ/1
φ/4
φ/16
φ/64
φ/256
φ/1024
External clock: TCLKA
TCLKB
TCLKC
TCLKD
Control logic
Section 11 16-Bit Timer Pulse Unit (TPU)
Interrupt request signals
Channel 0: TGI0A
TGI0B
TGI0C
TGI0D
TCI0V
Channel 1: TGI1A
TGI1B
TCI1V
TCI1U
Channel 2: TGI2A
TGI2B
TCI2V
TCI2U
Timer start register
TIER:
Timer interrupt enable register
Timer synchronous register
TSR:
Timer status register
Timer control register
TGR (A, B, C, D) : Timer general registers (A, B, C, D)
Timer mode register
Timer I/O control registers (H, L)
Figure 11.2 Block Diagram of TPU (H8S/2227 Group)
Rev. 5.00 Aug 08, 2006 page 363 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.2
Input/Output Pins
Table 11.2 Pin Configuration
Channel
Symbol
I/O
Function
All
TCLKA
Input
External clock A input pin
(Channels 1 and 5* phase counting mode A phase input)
TCLKB
Input
External clock B input pin
(Channels 1 and 5* phase counting mode B phase input)
TCLKC
Input
External clock C input pin
(Channels 2 and 4* phase counting mode A phase input)
TCLKD
Input
External clock D input pin
(Channels 2 and 4* phase counting mode B phase input)
TIOCA0
I/O
TGRA_0 input capture input/output compare output/PWM output pin
TIOCB0
I/O
TGRB_0 input capture input/output compare output/PWM output pin
TIOCC0
I/O
TGRC_0 input capture input/output compare output/PWM output pin
TIOCD0
I/O
TGRD_0 input capture input/output compare output/PWM output pin
TIOCA1
I/O
TGRA_1 input capture input/output compare output/PWM output pin
TIOCB1
I/O
TGRB_1 input capture input/output compare output/PWM output pin
TIOCA2
I/O
TGRA_2 input capture input/output compare output/PWM output pin
TIOCB2
I/O
TGRB_2 input capture input/output compare output/PWM output pin
TIOCA3
I/O
TGRA_3 input capture input/output compare output/PWM output pin
TIOCB3
I/O
TGRB_3 input capture input/output compare output/PWM output pin
TIOCC3
I/O
TGRC_3 input capture input/output compare output/PWM output pin
TIOCD3
I/O
TGRD_3 input capture input/output compare output/PWM output pin
TIOCA4
I/O
TGRA_4 input capture input/output compare output/PWM output pin
TIOCB4
I/O
TGRB_4 input capture input/output compare output/PWM output pin
TIOCA5
I/O
TGRA_5 input capture input/output compare output/PWM output pin
TIOCB5
I/O
TGRB_5 input capture input/output compare output/PWM output pin
0
1
2
3*
4*
5*
Note:
*
Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.3
Register Descriptions
The TPU has the following registers in each channel.
• Timer control register_0 (TCR_0)
• Timer mode register_0 (TMDR_0)
• Timer I/O control register H_0 (TIORH_0)
• Timer I/O control register L_0 (TIORL_0)
• Timer interrupt enable register_0 (TIER_0)
• Timer status register_0 (TSR_0)
• Timer counter_0 (TCNT_0)
• Timer general register A_0 (TGRA_0)
• Timer general register B_0 (TGRB_0)
• Timer general register C_0 (TGRC_0)
• Timer general register D_0 (TGRD_0)
• Timer control register_1 (TCR_1)
• Timer mode register_1 (TMDR_1)
• Timer I/O control register _1 (TIOR_1)
• Timer interrupt enable register_1 (TIER_1)
• Timer status register_1 (TSR_1)
• Timer counter_1 (TCNT_1)
• Timer general register A_1 (TGRA_1)
• Timer general register B_1 (TGRB_1)
• Timer control register_2 (TCR_2)
• Timer mode register_2 (TMDR_2)
• Timer I/O control register_2 (TIOR_2)
• Timer interrupt enable register_2 (TIER_2)
• Timer status register_2 (TSR_2)
• Timer counter_2 (TCNT_2)
• Timer general register A_2 (TGRA_2)
• Timer general register B_2 (TGRB_2)
• Timer control register_3 (TCR_3)*
• Timer mode register_3 (TMDR_3)*
• Timer I/O control register H_3 (TIORH_3)*
• Timer I/O control register L_3 (TIORL_3)*
Rev. 5.00 Aug 08, 2006 page 365 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
• Timer interrupt enable register_3 (TIER_3)*
• Timer status register_3 (TSR_3)*
• Timer counter_3 (TCNT_3)*
• Timer general register A_3 (TGRA_3)*
• Timer general register B_3 (TGRB_3)*
• Timer general register C_3 (TGRC_3)*
• Timer general register D_3 (TGRD_3)*
• Timer control register_4 (TCR_4)*
• Timer mode register_4 (TMDR_4)*
• Timer I/O control register _4 (TIOR_4)*
• Timer interrupt enable register_4 (TIER_4)*
• Timer status register_4 (TSR_4)*
• Timer counter_4 (TCNT_4)*
• Timer general register A_4 (TGRA_4)*
• Timer general register B_4 (TGRB_4)*
• Timer control register_5 (TCR_5)*
• Timer mode register_5 (TMDR_5)*
• Timer I/O control register_5 (TIOR_5)*
• Timer interrupt enable register_5 (TIER_5)*
• Timer status register_5 (TSR_5)*
• Timer counter_5 (TCNT_5)*
• Timer general register A_5 (TGRA_5)*
• Timer general register B_5 (TGRB_5)*
Common Registers
• Timer start register (TSTR)
• Timer synchronous register (TSYR)
Note: * Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.1
Timer Control Register (TCR)
The TCR registers control the TCNT operation for each channel. The TPU of the H8S/2227 Group
has a total of three TCR registers, one each for channels 0 to 2. In other groups, the TPU has a
total of six TCR registers, one each for channels 0 to 5. TCR register settings should be made only
when TCNT operation is stopped.
Bit
Bit Name
Initial Value
R/W
Description
7
6
5
CCLR2
CCLR1
CCLR0
0
0
0
R/W
R/W
R/W
Counter Clear 2 to 0
4
3
CKEG1
CKEG0
0
0
R/W
R/W
Clock Edge 1 and 0
These bits select the TCNT counter clearing source.
See tables 11.3 and 11.4 for details.
These bits select the input clock edge. When the
input clock is counted using both edges, the input
clock period is halved (e.g. φ/4 both edges = φ/2
rising edge). If phase counting mode is used on
channels 1, 2, 4*, and 5*, this setting is ignored and
the phase counting mode setting has priority. Internal
clock edge selection is valid when the input clock is
φ/4 or slower. This setting is ignored if the input clock
is φ/1, or when overflow/underflow of another channel
is selected.
00: Count at rising edge
01: Count at falling edge
1×: Count at both edges
Legend: ×: Don’t care
2
1
0
Note:
TPSC2
TPSC1
TPSC0
*
0
0
0
R/W
R/W
R/W
Time Prescaler 2 to 0
These bits select the TCNT counter clock. The clock
source can be selected independently for each
channel. See tables 11.5 to 11.10 for details.
Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.3 CCLR2 to CCLR0 (Channels 0 and 3)
Channel
Bit 7
CCLR2
Bit 6
CCLR1
Bit 5
CCLR0
Description
3
0, 3*
0
0
0
TCNT clearing disabled
1
TCNT cleared by TGRA compare match/input
capture
0
TCNT cleared by TGRB compare match/input
capture
1
TCNT cleared by counter clearing for another
channel performing synchronous clearing/
1
synchronous operation*
0
TCNT clearing disabled
1
TCNT cleared by TGRC compare match/input
2
capture*
0
TCNT cleared by TGRD compare match/input
2
capture*
1
TCNT cleared by counter clearing for another
channel performing synchronous clearing/
1
synchronous operation*
1
1
0
1
Notes: 1. Synchronous operation setting is performed by setting the SYNC bit in TSYR to 1.
2. When TGRC or TGRD is used as a buffer register, TCNT is not cleared because the
buffer register setting has priority, and compare match/input capture does not occur.
3. Not available in the H8S/2227 Group.
Table 11.4 CCLR2 to CCLR0 (Channels 1, 2, 4, and 5)
Channel
*3
1, 2, 4 ,
3
5*
Bit 7
Bit 6
2
Reserved* CCLR1
Bit 5
CCLR0
Description
0
0
TCNT clearing disabled
1
TCNT cleared by TGRA compare match/input
capture
0
TCNT cleared by TGRB compare match/input
capture
1
TCNT cleared by counter clearing for another
channel performing synchronous clearing/
1
synchronous operation*
0
1
Notes: 1. Synchronous operation setting is performed by setting the SYNC bit in TSYR to 1.
2. Bit 7 is reserved in channels 1, 2, 4, and 5. It is always read as 0 and cannot be
modified.
3. Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.5 TPSC2 to TPSC0 (Channel 0)
Channel
Bit 2
TPSC2
Bit 1
TPSC1
Bit 0
TPSC0
Description
0
0
0
0
Internal clock: counts on φ/1
1
Internal clock: counts on φ/4
0
Internal clock: counts on φ/16
1
Internal clock: counts on φ/64
0
External clock: counts on TCLKA pin input
1
External clock: counts on TCLKB pin input
0
External clock: counts on TCLKC pin input
1
External clock: counts on TCLKD pin input
1
1
0
1
Table 11.6 TPSC2 to TPSC0 (Channel 1)
Channel
Bit 2
TPSC2
Bit 1
TPSC1
Bit 0
TPSC0
Description
1
0
0
0
Internal clock: counts on φ/1
1
Internal clock: counts on φ/4
1
0
Internal clock: counts on φ/16
1
Internal clock: counts on φ/64
0
0
External clock: counts on TCLKA pin input
1
External clock: counts on TCLKB pin input
0
Internal clock: counts on φ/256
1
Counts on TCNT2 overflow/underflow
1
1
Setting is prohibited in the H8S/2227 Group.
Note: This setting is ignored when channel 1 is in phase counting mode.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.7 TPSC2 to TPSC0 (Channel 2)
Channel
Bit 2
TPSC2
Bit 1
TPSC1
Bit 0
TPSC0
Description
2
0
0
0
Internal clock: counts on φ/1
1
Internal clock: counts on φ/4
0
Internal clock: counts on φ/16
1
Internal clock: counts on φ/64
0
External clock: counts on TCLKA pin input
1
External clock: counts on TCLKB pin input
0
External clock: counts on TCLKC pin input
1
Internal clock: counts on φ/1024
1
1
0
1
Note: This setting is ignored when channel 2 is in phase counting mode.
Table 11.8 TPSC2 to TPSC0 (Channel 3)
Channel
Bit 2
TPSC2
Bit 1
TPSC1
Bit 0
TPSC0
Description
3*
0
0
0
Internal clock: counts on φ/1
1
Internal clock: counts on φ/4
0
Internal clock: counts on φ/16
1
Internal clock: counts on φ/64
0
0
External clock: counts on TCLKA pin input
1
Internal clock: counts on φ/1024
1
0
Internal clock: counts on φ/256
1
Internal clock: counts on φ/4096
1
1
Note:
*
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 370 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.9 TPSC2 to TPSC0 (Channel 4)
Channel
Bit 2
TPSC2
Bit 1
TPSC1
Bit 0
TPSC0
Description
4*
0
0
0
Internal clock: counts on φ/1
1
Internal clock: counts on φ/4
0
Internal clock: counts on φ/16
1
Internal clock: counts on φ/64
0
External clock: counts on TCLKA pin input
1
External clock: counts on TCLKC pin input
0
Internal clock: counts on φ/1024
1
Counts on TCNT5 overflow/underflow
1
1
0
1
Notes: This setting is ignored when channel 4 is in phase counting mode.
* Not available in the H8S/2227 Group.
Table 11.10 TPSC2 to TPSC0 (Channel 5)
Channel
Bit 2
TPSC2
Bit 1
TPSC1
Bit 0
TPSC0
Description
5*
0
0
0
Internal clock: counts on φ/1
1
Internal clock: counts on φ/4
0
Internal clock: counts on φ/16
1
Internal clock: counts on φ/64
0
External clock: counts on TCLKA pin input
1
External clock: counts on TCLKC pin input
0
Internal clock: counts on φ/256
1
External clock: counts on TCLKD pin input
1
1
0
1
Notes: This setting is ignored when channel 5 is in phase counting mode.
* Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 371 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.2
Timer Mode Register (TMDR)
The TMDR registers are used to set the operating mode for each channel. The TPU of the
H8S/2227 Group has a total of three TMDR registers, one each for channels 0 to 2. In other
groups, the TPU has a total of six TMDR registers, one each for channels 0 to 5. TMDR register
settings should be made only when TCNT operation is stopped.
Bit
Bit Name
Initial Value
R/W
Description
7, 6
—
All 1
—
Reserved
These bits are always read as 1 and cannot be
modified.
5
BFB
0
R/W
Buffer Operation B
Specifies whether TGRB is to operate in the normal
way, or TGRB and TGRD are to be used together for
buffer operation. When TGRD is used as a buffer
register, TGRD input capture/output compare is not
generated.
In channels 1, 2, 4*, and 5*, which have no TGRD,
bit 5 is reserved. It is always read as 0 and cannot be
modified.
0: TGRB operates normally
1: TGRB and TGRD used together for buffer
operation
4
BFA
0
R/W
Buffer Operation A
Specifies whether TGRA is to operate in the normal
way, or TGRA and TGRC are to be used together for
buffer operation. When TGRC is used as a buffer
register, TGRC input capture/output compare is not
generated.
In channels 1, 2, 4*, and 5*, which have no TGRC,
bit 4 is reserved. It is always read as 0 and cannot be
modified.
0: TGRA operates normally
1: TGRA and TGRC used together for buffer
operation
3
2
1
0
Note:
MD3
MD2
MD1
MD0
*
0
0
0
0
R/W
R/W
R/W
R/W
Modes 3 to 0
These bits are used to set the timer operating mode.
MD3 is a reserved bit. The write value should always
be 0. See table 11.11 for details.
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 372 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.11 MD3 to MD0
Bit 3
1
MD3*
Bit 2
2
MD2*
Bit 1
MD1
Bit 0
MD0
Description
0
0
0
0
Normal operation
1
Reserved
0
PWM mode 1
1
PWM mode 2
0
Phase counting mode 1
1
Phase counting mode 2
0
Phase counting mode 3
1
Phase counting mode 4
×
—
1
1
0
1
1
×
×
Legend: ×: Don’t care
Notes: 1. MD3 is a reserved bit. In a write, it should always be written with 0.
2. Phase counting mode cannot be set for channels 0 and 3. In this case, 0 should always
be written to MD2.
11.3.3
Timer I/O Control Register (TIOR)
The TIOR registers control the TGR registers. The TPU of the H8S/2227 Group has a total of four
TIOR registers, two for channel 0 and one each for channels 1 and 2. In other groups, the TPU has
a total of eight TIOR registers, two each for channels 0 and 3, and one each for channels 1, 2, 4,
and 5. Care is required since TIOR is affected by the TMDR setting.
The initial output specified by TIOR is valid when the counter is stopped (the CST bit in TSTR is
cleared to 0). Note also that, in PWM mode 2, the output at the point at which the counter is
cleared to 0 is specified.
When TGRC or TGRD is designated for buffer operation, this setting is invalid and the register
operates as a buffer register.
Rev. 5.00 Aug 08, 2006 page 373 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
TIORH_0, TIOR_1, TIOR_2, TIORH_3*, TIOR_4*, TIOR_5*
Bit
Bit Name
Initial Value
R/W
Description
7
IOB3
0
R/W
I/O Control B3 to B0
6
IOB2
0
R/W
5
IOB1
0
R/W
4
IOB0
0
R/W
Specify the function of TGRB.
For details, see tables 11.12, 11.14, 11.15, 11.16,
11.18, and 11.19.
3
IOA3
0
R/W
I/O Control A3 to A0
2
IOA2
0
R/W
1
IOA1
0
R/W
0
IOA0
0
R/W
Specify the function of TGRA.
For details, see tables 11.20, 11.22, 11.23, 11.24,
11.26, and 11.27.
Note:
*
Not available in the H8S/2227 Group.
TIORL_0, TIORL_3*
Bit
Bit Name
Initial Value
R/W
Description
7
IOD3
0
R/W
I/O Control D3 to D0
6
IOD2
0
R/W
5
IOD1
0
R/W
Specify the function of TGRD.
For details, see tables 11.13 and 11.17.
4
IOD0
0
R/W
3
IOC3
0
R/W
I/O Control C3 to C0
2
IOC2
0
R/W
1
IOC1
0
R/W
Specify the function of TGRC.
For details, see tables 11.21 and 11.25
0
IOC0
0
R/W
Note:
*
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 374 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.12 TIORH_0
Description
Bit 7
IOB3
Bit 6
IOB2
Bit 5
IOB1
Bit 4
IOB0
TGRB_0
Function
0
0
0
0
Output
compare
register
1
1
0
TIOCB0 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCB0 pin
Input capture at rising edge
Capture input source is TIOCB0 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCB0 pin
Input capture at both edges
1
Capture input source is channel 1/count clock
Input capture at TCNT_1 count- up/count1 2
down* *
Legend: ×: Don’t care
Notes: 1. When bits TPSC2 to TPSC0 in TCR_1 are set to B'000 and φ/1 is used as the TCNT_1
count clock, this setting is invalid and input capture is not generated.
2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 375 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.13 TIORL_0
Description
Bit 7
IOD3
Bit 6
IOD2
Bit 5
IOD1
Bit 4
IOD0
TGRD_0
Function
0
0
0
0
Output
compare
2
register*
1
1
0
TIOCD0 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
2
register*
Capture input source is TIOCD0 pin
Input capture at rising edge
Capture input source is TIOCD0 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCD0 pin
Input capture at both edges
1
Capture input source is channel 1/count clock
Input capture at TCNT_1 count-up/count1 3
down* *
Legend: ×: Don’t care
Notes: 1. When bits TPSC2 to TPSC0 in TCR_1 are set to B'000 and φ/1 is used as the TCNT_1
count clock, this setting is invalid and input capture is not generated.
2. When the BFB bit in TMDR_0 is set to 1 and TGRD_0 is used as a buffer register, this
setting is invalid and input capture/output compare is not generated.
3. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 376 of 982
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.14 TIOR_1
Description
Bit 7
IOB3
Bit 6
IOB2
Bit 5
IOB1
Bit 4
IOB0
TGRB_1
Function
0
0
0
0
Output
compare
register
1
1
0
TIOCB1 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCB1 pin
Input capture at rising edge
Capture input source is TIOCB1 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCB1 pin
Input capture at both edges
1
TGRC_0 compare match/input capture
Input capture at generation of TGRC_0
compare match/input capture*
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 377 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.15 TIOR_2
Description
Bit 7
IOB3
Bit 6
IOB2
Bit 5
IOB1
Bit 4
IOB0
TGRB_2
Function
0
0
0
0
Output
compare
register
1
1
0
TIOCB2 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
×
0
0
1
Input
capture
register
Capture input source is TIOCB2 pin
Input capture at rising edge
Capture input source is TIOCB2 pin
Input capture at falling edge
1
×
Capture input source is TIOCB2 pin
Input capture at both edges
Legend: ×: Don’t care
Rev. 5.00 Aug 08, 2006 page 378 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.16 TIORH_3
Description
Bit 7
IOB3
Bit 6
IOB2
Bit 5
IOB1
Bit 4
IOB0
TGRB_3
2
Function*
0
0
0
0
Output
compare
register
1
1
0
TIOCB3 Pin Function*
2
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCB3 pin
Input capture at rising edge
Capture input source is TIOCB3 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCB3 pin
Input capture at both edges
1
Capture input source is channel 4/count clock
Input capture at TCNT_4 count-up/count1
down*
Legend: ×: Don’t care
Notes: 1. When bits TPSC2 to TPSC0 in TCR_4 are set to B'000 and φ/1 is used as the TCNT_4
count clock, this setting is invalid and input capture is not generated.
2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 379 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.17 TIORL_3
Description
Bit 7
IOD3
Bit 6
IOD2
Bit 5
IOD1
Bit 4
IOD0
TGRD_3
3
Function*
0
0
0
0
Output
compare
2
register*
1
1
0
TIOCD3 Pin Function*
3
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
2
register*
Capture input source is TIOCD3 pin
Input capture at rising edge
Capture input source is TIOCD3 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCD3 pin
Input capture at both edges
1
Capture input source is channel 4/count clock
Input capture at TCNT_4 count-up/count1
down*
Legend: ×: Don’t care
Notes: 1. When bits TPSC2 to TPSC0 in TCR_4 are set to B'000 and φ/1 is used as the TCNT_4
count clock, this setting is invalid and input capture is not generated.
2. When the BFB bit in TMDR_3 is set to 1 and TGRD_3 is used as a buffer register, this
setting is invalid and input capture/output compare is not generated.
3. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 380 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.18 TIOR_4
Description
Bit 7
IOB3
Bit 6
IOB2
Bit 5
IOB1
Bit 4
IOB0
TGRB_4
Function*
0
0
0
0
Output
compare
register
1
1
0
TIOCB4 Pin Function*
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCB4 pin
Input capture at rising edge
Capture input source is TIOCB4 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCB4 pin
Input capture at both edges
1
Capture input source is TGRC_3 compare
match/input capture
Input capture at generation of TGRC_3
compare match/input capture
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 381 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.19 TIOR_5
Description
Bit 7
IOB3
Bit 6
IOB2
Bit 5
IOB1
Bit 4
IOB0
TGRB_5
Function*
0
0
0
0
Output
compare
register
1
1
0
TIOCB5 Pin Function*
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
×
0
0
1
Input
capture
register
Capture input source is TIOCB5 pin
Input capture at rising edge
Capture input source is TIOCB5 pin
Input capture at falling edge
1
×
Capture input source is TIOCB5 pin
Input capture at both edges
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 382 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.20 TIORH_0
Description
Bit 3
IOA3
Bit 2
IOA2
Bit 1
IOA1
Bit 0
IOA0
TGRA_0
Function
0
0
0
0
Output
compare
register
1
1
0
TIOCA0 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCA0 pin
Input capture at rising edge
Capture input source is TIOCA0 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCA0 pin
Input capture at both edges
1
Capture input source is channel 1/count clock
Input capture at TCNT_1 count-up/count-down*
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 383 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.21 TIORL_0
Description
Bit 3
IOC3
Bit 2
IOC2
Bit 1
IOC1
Bit 0
IOC0
TGRC_0
Function
0
0
0
0
Output
compare
1
register*
1
1
0
TIOCC0 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
1
register*
Capture input source is TIOCC0 pin
Input capture at rising edge
Capture input source is TIOCC0 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCC0 pin
Input capture at both edges
1
Capture input source is channel 1/count clock
Input capture at TCNT_1 count-up/count2
down*
Legend: ×: Don’t care
Notes: 1. When the BFA bit in TMDR_0 is set to 1 and TGRC_0 is used as a buffer register, this
setting is invalid and input capture/output compare is not generated.
2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 384 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.22 TIOR_1
Description
Bit 3
IOA3
Bit 2
IOA2
Bit 1
IOA1
Bit 0
IOA0
TGRA_1
Function
0
0
0
0
Output
compare
register
1
1
0
TIOCA1 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCA1 pin
Input capture at rising edge
Capture input source is TIOCA1 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCA1 pin
Input capture at both edges
1
Capture input source is TGRA_0 compare
match/input capture
Input capture at generation of channel
0/TGRA_0 compare match/input capture*
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 385 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.23 TIOR_2
Description
Bit 3
IOA3
Bit 2
IOA2
Bit 1
IOA1
Bit 0
IOA0
TGRA_2
Function
0
0
0
0
Output
compare
register
1
1
0
TIOCA2 Pin Function
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
×
0
0
1
Input
capture
register
Capture input source is TIOCA2 pin
Input capture at rising edge
Capture input source is TIOCA2 pin
Input capture at falling edge
1
×
Capture input source is TIOCA2 pin
Input capture at both edges
Legend: ×: Don’t care
Rev. 5.00 Aug 08, 2006 page 386 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.24 TIORH_3
Description
Bit 3
IOA3
Bit 2
IOA2
Bit 1
IOA1
Bit 0
IOA0
TGRA_3
Function*
0
0
0
0
Output
compare
register
1
1
0
TIOCA3 Pin Function*
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCA3 pin
Input capture at rising edge
Capture input source is TIOCA3 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCA3 pin
Input capture at both edges
1
Capture input source is channel 4/count clock
Input capture at TCNT_4 count-up/count-down
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 387 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.25 TIORL_3
Description
Bit 3
IOC3
Bit 2
IOC2
Bit 1
IOC1
Bit 0
IOC0
TGRC_3
2
Function*
0
0
0
0
Output
compare
1
register*
1
1
0
TIOCC3 Pin Function*
2
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
1
register*
Capture input source is TIOCC3 pin
Input capture at rising edge
Capture input source is TIOCC3 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCC3 pin
Input capture at both edges
1
Capture input source is channel 4/count clock
Input capture at TCNT_4 count-up/count-down
Legend: ×: Don’t care
Notes: 1. When the BFA bit in TMDR_3 is set to 1 and TGRC_3 is used as a buffer register, this
setting is invalid and input capture/output compare is not generated.
2. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 388 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.26 TIOR_4
Description
Bit 3
IOA3
Bit 2
IOA2
Bit 1
IOA1
Bit 0
IOA0
TGRA_4
Function*
0
0
0
0
Output
compare
register
1
1
0
TIOCA4 Pin Function*
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
0
0
0
1
Input
capture
register
Capture input source is TIOCA4 pin
Input capture at rising edge
Capture input source is TIOCA4 pin
Input capture at falling edge
1
×
×
×
Capture input source is TIOCA4 pin
Input capture at both edges
1
Capture input source is TGRA_3 compare
match/input capture
Input capture at generation of TGRA_3
compare match/input capture
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 389 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.27 TIOR_5
Description
Bit 3
IOA3
Bit 2
IOA2
Bit 1
IOA1
Bit 0
IOA0
TGRA_5
Function*
0
0
0
0
Output
compare
register
1
1
0
TIOCA5 Pin Function*
Output disabled
Initial output is 0 output
0 output at compare match
Initial output is 0 output
1 output at compare match
1
Initial output is 0 output
Toggle output at compare match
1
0
0
Output disabled
1
Initial output is 1 output
0 output at compare match
1
0
Initial output is 1 output
1 output at compare match
1
Initial output is 1 output
Toggle output at compare match
1
×
0
0
1
Input
capture
register
Input capture source is TIOCA5 pin
Input capture at rising edge
Input capture source is TIOCA5 pin
Input capture at falling edge
1
×
Input capture source is TIOCA5 pin
Input capture at both edges
Legend:
Note: *
×: Don’t care
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 390 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.4
Timer Interrupt Enable Register (TIER)
The TIER registers control enabling or disabling of interrupt requests for each channel. The TPU
of the H8S/2227 Group has a total of three TIER registers, one each for channels 0 to 2. In other
groups, the TPU has a total of six TIER registers, one each for channels 0 to 5.
Bit
Bit Name
Initial value
R/W
Description
7
TTGE
0
R/W
A/D Conversion Start Request Enable
Enables or disables generation of A/D conversion
start requests by TGRA input capture/compare
match.
0: A/D conversion start request generation disabled
1: A/D conversion start request generation enabled
6
—
1
—
Reserved
This bit is always read as 1 and cannot be
modified.
5
TCIEU
0
R/W
Underflow Interrupt Enable
Enables or disables interrupt requests (TCIU) by
the TCFU flag when the TCFU flag in TSR is set to
1 in channels 1, 2, 4*, and 5*.
In channels 0 and 3*, bit 5 is reserved. It is always
read as 0 and cannot be modified.
0: Interrupt requests (TCIU) by TCFU disabled
1: Interrupt requests (TCIU) by TCFU enabled
4
TCIEV
0
R/W
Overflow Interrupt Enable
Enables or disables interrupt requests (TCIV) by
the TCFV flag when the TCFV flag in TSR is set to
1.
0: Interrupt requests (TCIV) by TCFV disabled
1: Interrupt requests (TCIV) by TCFV enabled
3
TGIED
0
R/W
TGR Interrupt Enable D
Enables or disables interrupt requests (TGID) by
the TGFD bit when the TGFD bit in TSR is set to 1
in channels 0 and 3*.
In channels 1, 2, 4*, and 5*, bit 3 is reserved. It is
always read as 0 and cannot be modified.
0: Interrupt requests (TGID) by TGFD bit disabled
1: Interrupt requests (TGID) by TGFD bit enabled
Rev. 5.00 Aug 08, 2006 page 391 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Bit
Bit Name
Initial value
R/W
Description
2
TGIEC
0
R/W
TGR Interrupt Enable C
Enables or disables interrupt requests (TGIC) by
the TGFC bit when the TGFC bit in TSR is set to 1
in channels 0 and 3*.
In channels 1, 2, 4*, and 5*, bit 2 is reserved. It is
always read as 0 and cannot be modified.
0: Interrupt requests (TGIC) by TGFC bit disabled
1: Interrupt requests (TGIC) by TGFC bit enabled
1
TGIEB
0
R/W
TGR Interrupt Enable B
Enables or disables interrupt requests (TGIB) by
the TGFB bit when the TGFB bit in TSR is set to 1.
0: Interrupt requests (TGIB) by TGFB bit disabled
1: Interrupt requests (TGIB) by TGFB bit enabled
0
TGIEA
0
R/W
TGR Interrupt Enable A
Enables or disables interrupt requests (TGIA) by
the TGFA bit when the TGFA bit in TSR is set to 1.
0: Interrupt requests (TGIA) by TGFA bit disabled
1: Interrupt requests (TGIA) by TGFA bit enabled
Note:
*
Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 392 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.5
Timer Status Register (TSR)
The TSR registers indicate the status of each channel. The TPU of the H8S/2227 Group has a total
of three TSR registers, one each for channels 0 to 2. In other groups, the TPU has a total of six
TSR registers, one each for channels 0 to 5.
Bit
Bit Name
Initial value
R/W
Description
7
TCFD
1
R
Count Direction Flag
Status flag that shows the direction in which TCNT
3
3
counts in channels 1, 2, 4* , and 5* .
3
In channels 0 and 3* , bit 7 is reserved. It is always
read as 1 and cannot be modified.
0: TCNT counts down
1: TCNT counts up
6
—
1
—
Reserved
This bit is always read as 1 and cannot be
modified.
5
TCFU
0
R/(W)*
1
Underflow Flag
Status flag that indicates that TCNT underflow has
3
3
occurred when channels 1, 2, 4* , and 5* are set
to phase counting mode.
3
In channels 0 and 3* , bit 5 is reserved. It is always
read as 0 and cannot be modified.
[Setting condition]
When the TCNT value underflows (changes from
H'0000 to H'FFFF)
[Clearing condition]
When 0 is written to TCFU after reading TCFU = 1
4
TCFV
0
R/(W)
*1
Overflow Flag
Status flag that indicates that TCNT overflow has
occurred.
[Setting condition]
When the TCNT value overflows (changes from
H'FFFF to H'0000)
[Clearing condition]
When 0 is written to TCFV after reading TCFV = 1
Rev. 5.00 Aug 08, 2006 page 393 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
Bit
3
Bit Name
TGFD
Initial value
0
R/W
R/(W)
Description
*1
Input Capture/Output Compare Flag D
Status flag that indicates the occurrence of TGRD
input capture or compare match in channels 0 and
3
3* .
3
3
In channels 1, 2, 4* , and 5* , bit 3 is reserved. It is
always read as 0 and cannot be modified.
[Setting conditions]
•
When TCNT = TGRD while TGRD is functioning
as output compare register
•
When TCNT value is transferred to TGRD by
input capture signal while TGRD is functioning
as input capture register
[Clearing conditions]
2
TGFC
0
R/(W)*
1
•
When DTC is activated by TGID interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
•
When 0 is written to TGFD after reading TGFD
=1
Input Capture/Output Compare Flag C
Status flag that indicates the occurrence of TGRC
input capture or compare match in channels 0 and
3
3* .
3
3
In channels 1, 2, 4* , and 5* , bit 2 is reserved. It is
always read as 0 and cannot be modified.
[Setting conditions]
•
When TCNT = TGRC while TGRC is functioning
as output compare register
•
When TCNT value is transferred to TGRC by
input capture signal while TGRC is functioning
as input capture register
[Clearing conditions]
Rev. 5.00 Aug 08, 2006 page 394 of 982
REJ09B0054-0500
•
When DTC is activated by TGIC interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
•
When 0 is written to TGFC after reading TGFC
=1
Section 11 16-Bit Timer Pulse Unit (TPU)
Bit
1
Bit Name
TGFB
Initial value
0
R/W
Description
*1
R/(W)
Input Capture/Output Compare Flag B
Status flag that indicates the occurrence of TGRB
input capture or compare match.
[Setting conditions]
•
When TCNT = TGRB while TGRB is functioning
as output compare register
•
When TCNT value is transferred to TGRB by
input capture signal while TGRB is functioning
as input capture register
[Clearing conditions]
0
TGFA
0
R/(W)*
1
•
When DTC is activated by TGIB interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
•
When 0 is written to TGFB after reading TGFB =
1
Input Capture/Output Compare Flag A
Status flag that indicates the occurrence of TGRA
input capture or compare match.
[Setting conditions]
•
When TCNT = TGRA while TGRA is functioning
as output compare register
•
When TCNT value is transferred to TGRA by
input capture signal while TGRA is functioning
as input capture register
[Clearing conditions]
•
When DTC is activated by TGIA interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
•
When DMAC is activated by TGIA interrupt
2
while DTE bit of DMABCR in DMAC is 1*
•
When 0 is written to TGFA after reading TGFA =
1
Notes: 1. Only 0 can be written, for flag clearing.
2. Supported only by the H8S/2239 Group.
3. Not available in the H8S/2227 Group.
Rev. 5.00 Aug 08, 2006 page 395 of 982
REJ09B0054-0500
Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.6
Timer Counter (TCNT)
The TCNT registers are 16-bit readable/writable counters. The TPU of the H8S/2227 Group has a
total of three TCNT registers, one each for channels 0 to 2. In other groups, the TPU has a total of
six TCNT registers, one each for channels 0 to 5.
The TCNT counters are initialized to H'0000 by a reset, or in hardware standby mode.
The TCNT counters cannot be accessed in 8-bit units; they must always be accessed as a 16-bit
unit.
11.3.7
Timer General Register (TGR)
The TGR registers are 16-bit readable/writable registers with a dual function as output compare
and input capture registers. The TPU of the H8S/2227 Group has a total of four TGR registers,
two for channel 0 and one each for channels 1 and 2. In other groups, the TPU has a total of eight
TGR registers, two each for channels 0 and 3, and one each for channels 1, 2, 4, and 5. TGRC and
TGRD for channels 0 and 3 can also be designated for operation as buffer registers. The TGR
registers cannot be accessed in 8-bit units; they must always be accessed as a 16-bit unit. TGR
buffer register combinations are TGRA-TGRC and TGRB-TGRD.
11.3.8
Timer Start Register (TSTR)
In the H8S/2227 Group, TSTR selects operate/stop for channels 0 to 2. In other groups, TSTR
selects operate/stop for channels 0 to 5. When setting the operating mode in TMDR or setting the
count clock in TCR, first stop the TCNT counter.
Bit
Bit Name
Initial value
R/W
Description
7, 6
—
All 0
—
Reserved
5
CST5*
0
R/W
Counter Start 5 to 0
4
0
R/W
These bits select operation or stoppage for TCNT.
3
CST4*
CST3*
0
R/W
2
CST2
0
R/W
1
CST1
0
R/W
0
CST0
0
R/W
If 0 is written to the CST bit during operation with the
TIOC pin designated for output, the counter stops but
the TIOC pin output compare output level is retained.
If TIOR is written to when the CST bit is cleared to 0,
the pin output level will be changed to the set initial
output value.
The write value should always be 0.
0: TCNT_5 to TCNT_0 count operation is stopped
1: TCNT_5 to TCNT_0 performs count operation
Note:
*
In the H8S/2227 Group, bits 5 to 3 are reserved. The write value should always be 0.
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.9
Timer Synchronous Register (TSYR)
In the H8S/2227 Group, TSYR selects independent or synchronous TCNT operation for channels
0 to 2. In other groups, TSYR selects independent or synchronous TCNT operation for channels 0
to 5. A channel performs synchronous operation when the corresponding bit in TSYR is set to 1.
Bit
Bit Name
Initial value
R/W
Description
7, 6
—
All 0
R/W
Reserved
The write value should always be 0.
0
R/W
Timer Synchronization 5 to 0
4
SYNC5 *
SYNC4 *
0
R/W
3
SYNC3 *
0
R/W
These bits select whether operation is independent of
or synchronized with other channels.
2
SYNC2
0
R/W
1
SYNC1
0
R/W
0
SYNC0
0
R/W
5
When synchronous operation is selected,
synchronous presetting of multiple channels, and
synchronous clearing through counter clearing on
another channel are possible.
To set synchronous operation, the SYNC bits for at
least two channels must be set to 1. To set
synchronous clearing, in addition to the SYNC bit, the
TCNT clearing source must also be set by means of
bits CCLR2 to CCLR0 in TCR.
0: TCNT_5 to TCNT_0 operates independently
(TCNT presetting /clearing is unrelated to
other channels)
1: TCNT_5 to TCNT_0 performs synchronous
operation (TCNT synchronous presetting/
synchronous clearing is possible)
Note:
*
In the H8S/2227 Group, bits 5 to 3 are reserved. The write value should always be 0.
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.4
Operation
11.4.1
Basic Functions
Each channel has a TCNT and TGR register. TCNT performs up-counting, and is also capable of
free-running operation, periodic counting, and external event counting.
Each TGR can be used as an input capture register or output compare register.
Counter Operation: When one of bits CST2 to CST0 (H8S/2227 Group) or bits CST5 to CST0
(groups other than H8S/2227) in TSTR is set to 1, the TCNT counter for the corresponding
channel starts counting. TCNT can operate as a free-running counter, periodic counter, and so on.
1. Example of count operation setting procedure
Figure 11.3 shows an example of the count operation setting procedure.
[1] Select the counter
clock with bits TPSC2
to TPSC0 in TCR. At
the same time, select
the input clock edge
with bits CKEG1 and
CKEG0 in TCR.
Operation selection
Select counter clock
[1]
Periodic counter
Free-running counter
Select counter clearing source
[2]
Select output compare register
[3]
Set period
Start count
[2] For periodic counter
operation, select the
TGR to be used as the
TCNT clearing source
with bits CCLR2 to
CCLR0 in TCR.
[3] Designate the TGR
selected in [2] as an
output compare
register by means of
TIOR.
[4] Set the periodic
counter cycle in the
TGR selected in [2].
[4]
[5]
<Periodic counter>
Start count
[5]
[5] Set the CST bit in
TSTR to 1 to start the
counter operation.
<Free-running counter>
Figure 11.3 Example of Counter Operation Setting Procedure
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Section 11 16-Bit Timer Pulse Unit (TPU)
2. Free-running count operation and periodic count operation
Immediately after a reset, the TPU’s TCNT counters are all designated as free-running
counters. When the relevant bit in TSTR is set to 1 the corresponding TCNT counter starts upcount operation as a free-running counter. When TCNT overflows (changes from H'FFFF to
H'0000), the TCFV bit in TSR is set to 1. If the value of the corresponding TCIEV bit in TIER
is 1 at this point, the TPU requests an interrupt. After overflow, TCNT starts counting up again
from H'0000.
Figure 11.4 illustrates free-running counter operation.
TCNT value
H'FFFF
H'0000
Time
CST bit
TCFV
Figure 11.4 Free-Running Counter Operation
When compare match is selected as the TCNT clearing source, the TCNT counter for the
relevant channel performs periodic count operation. The TGR register for setting the period is
designated as an output compare register, and counter clearing by compare match is selected
by means of bits CCLR2 to CCLR0 in TCR. After the settings have been made, TCNT starts
count-up operation as a periodic counter when the corresponding bit in TSTR is set to 1. When
the count value matches the value in TGR, the TGF bit in TSR is set to 1 and TCNT is cleared
to H'0000.
If the value of the corresponding TGIE bit in TIER is 1 at this point, the TPU requests an
interrupt. After a compare match, TCNT starts counting up again from H'0000.
Figure 11.5 illustrates periodic counter operation.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Counter cleared by TGR
compare match
TCNT value
TGR
H'0000
Time
CST bit
Flag cleared by software, DTC, or
DMAC* activation
TGF
Note: * Supported only by the H8S/2239 Group.
Figure 11.5 Periodic Counter Operation
Waveform Output by Compare Match: The TPU can perform 0, 1, or toggle output from the
corresponding output pin using a compare match.
1. Example of setting procedure for waveform output by compare match
Figure 11.6 shows an example of the setting procedure for waveform output by a compare
match.
[1]
Output selection
Select initial value 0 output or 1 output, and
compare match output value 0 output, 1 output,
or toggle output, by means of TIOR. The set
initial value is output at the TIOC pin until the
Select waveform output mode
first compare match occurs.
[1]
[2]
Set the timing for compare match generation in
TGR.
Set output timing
[2]
[3]
Set the CST bit in TSTR to 1 to start the count
operation.
Start count
[3]
<Waveform output>
Figure 11.6 Example of Setting Procedure for Waveform Output by Compare Match
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Section 11 16-Bit Timer Pulse Unit (TPU)
2. Examples of waveform output operation
Figure 11.7 shows an example of 0 output/1 output.
In this example, TCNT has been designated as a free-running counter, and settings have been
made so that 1 is output by compare match A, and 0 is output by compare match B. When the
set level and the pin level match, the pin level does not change.
TCNT value
H'FFFF
TGRA
TGRB
Time
H'0000
No change
No change
1 output
TIOCA
TIOCB
No change
No change
0 output
Figure 11.7 Example of 0 Output/1 Output Operation
Figure 11.8 shows an example of toggle output.
In this example TCNT has been designated as a periodic counter (with counter clearing
performed by compare match B), and settings have been made so that output is toggled by both
compare match A and compare match B.
TCNT value
Counter cleared by TGRB compare match
H'FFFF
TGRB
TGRA
Time
H'0000
Toggle output
TIOCB
Toggle output
TIOCA
Figure 11.8 Example of Toggle Output Operation
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Section 11 16-Bit Timer Pulse Unit (TPU)
Input Capture Function: The TCNT value can be transferred to TGR on detection of the TIOC
pin input edge.
Rising edge, falling edge, or both edges can be selected as the detection edge. For channels 0, 1,
3*, and 4*, it is also possible to specify another channel’s counter input clock or compare match
signal as the input capture source.
Notes: When another channel’s counter input clock is used as the input capture input for channels
0 and 3, φ/1 should not be selected as the counter input clock used for input capture input.
Input capture will not be generated if φ/1 is selected.
* Not available in the H8S/2227 Group.
1. Example of setting procedure for input capture operation
Figure 11.9 shows an example of the setting procedure for input capture operation.
[1]
Input selection
Designate TGR as an input capture register by
means of TIOR, and select the input capture source
and input signal edge (rising edge, falling
edge, or both edges).
Select input capture input
[1]
[2]
Set the CST bit in TSTR to 1 to start the count
operation.
Start count
[2]
<Input capture operation>
Figure 11.9 Example of Setting Procedure for Input Capture Operation
2. Example of input capture operation
Figure 11.10 shows an example of input capture operation.
In this example both rising and falling edges have been selected as the TIOCA pin input
capture input edge, falling edge has been selected as the TIOCB pin input capture input edge,
and counter clearing by TGRB input capture has been designated for TCNT.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Counter cleared by TIOCB
input (falling edge)
TCNT value
H'0180
H'0160
H'0010
H'0005
Time
H'0000
TIOCA
TGRA
H'0005
H'0160
H'0010
TIOCB
TGRB
H'0180
Figure 11.10 Example of Input Capture Operation
11.4.2
Synchronous Operation
In synchronous operation, the values in multiple TCNT counters can be rewritten simultaneously
(synchronous presetting). Also, multiple of TCNT counters can be cleared simultaneously
(synchronous clearing) by making the appropriate setting in TCR.
Synchronous operation enables TGR to be incremented with respect to a single time base.
Channels 0 to 2 (H8S/2227 Group) or 0 to 5 (groups other than H8S/2227) can all be designated
for synchronous operation.
Example of Synchronous Operation Setting Procedure: Figure 11.11 shows an example of the
synchronous operation setting procedure.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Synchronous operation
selection
Set synchronous
operation
[1]
Synchronous presetting
Set TCNT
Synchronous clearing
[2]
Clearing
source generation
channel?
No
Yes
<Synchronous presetting>
Select counter
clearing source
[3]
Set synchronous
counter clearing
[4]
Start count
[5]
Start count
[5]
<Counter clearing>
<Synchronous clearing>
[1]
Set to 1 the SYNC bits in TSYR corresponding to the channels to be designated for synchronous operation.
[2]
When the TCNT counter of any of the channels designated for synchronous operation is written to, the same value is
simultaneously written to the other TCNT counters.
[3]
Use bits CCLR2 to CCLR0 in TCR to specify TCNT clearing by input capture/output compare, etc.
[4]
Use bits CCLR2 to CCLR0 in TCR to designate synchronous clearing for the counter clearing source.
[5]
Set to 1 the CST bits in TSTR for the relevant channels, to start the count operation.
Figure 11.11 Example of Synchronous Operation Setting Procedure
Example of Synchronous Operation: Figure 11.12 shows an example of synchronous operation.
In this example, synchronous operation and PWM mode 1 have been designated for channels 0 to
2, TGRB_0 compare match has been set as the channel 0 counter clearing source, and
synchronous clearing has been set for the channel 1 and 2 counter clearing source.
Three-phase PWM waveforms are output from pins TIOCA2, TIOCA1, and TIOCA0. At this
time, synchronous presetting, and synchronous clearing by TGRB_0 compare match, is performed
for channel 0 to 2 TCNT counters, and the data set in TGRB_0 is used as the PWM cycle.
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Section 11 16-Bit Timer Pulse Unit (TPU)
For details on PWM modes, see section 11.4.5, PWM Modes.
Synchronous clearing by TGRB_0 compare match
TCNT0 to TCNT2 values
TGRB_0
TGRB_1
TGRA_0
TGRB_2
TGRA_1
TGRA_2
Time
H'0000
TIOCA0
TIOCA1
TIOCA2
Figure 11.12 Example of Synchronous Operation
11.4.3
Buffer Operation
Buffer operation, provided for channels 0 and 3, enables TGRC and TGRD to be used as buffer
registers.
Buffer operation differs depending on whether TGR has been designated as an input capture
register or a compare match register.
Table 11.28 shows the register combinations used in buffer operation.
Table 11.28 Register Combinations in Buffer Operation
Channel
Timer General Register
Buffer Register
0
TGRA_0
TGRC_0
TGRB_0
TGRD_0
TGRA_3
TGRC_3
TGRB_3
TGRD_3
3*
Note:
*
Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
• When TGR is an output compare register
When a compare match occurs, the value in the buffer register for the corresponding channel is
transferred to the timer general register.
This operation is illustrated in figure 11.13.
Compare match signal
Buffer register
Timer general
register
Comparator
TCNT
Figure 11.13 Compare Match Buffer Operation
• When TGR is an input capture register
When input capture occurs, the value in TCNT is transferred to TGR and the value previously
held in the timer general register is transferred to the buffer register.
This operation is illustrated in figure 11.14.
Input capture
signal
Timer general
register
Buffer register
Figure 11.14 Input Capture Buffer Operation
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TCNT
Section 11 16-Bit Timer Pulse Unit (TPU)
Example of Buffer Operation Setting Procedure: Figure 11.15 shows an example of the buffer
operation setting procedure.
[1]
Buffer operation
Designate TGR as an input capture register or
output compare register by means of TIOR.
[2]
Select TGR function
[1]
BFA and BFB in TMDR.
[3]
Set buffer operation
[2]
Start count
[3]
Designate TGR for buffer operation with bits
Set the CST bit in TSTR to 1 to start the count
operation.
<Buffer operation>
Figure 11.15 Example of Buffer Operation Setting Procedure
Examples of Buffer Operation:
1. When TGR is an output compare register
Figure 11.16 shows an operation example in which PWM mode 1 has been designated for
channel 0, and buffer operation has been designated for TGRA and TGRC. The settings used
in this example are TCNT clearing by compare match B, 1 output at compare match A, and 0
output at compare match B.
As buffer operation has been set, when compare match A occurs the output changes and the
value in buffer register TGRC is simultaneously transferred to timer general register TGRA.
This operation is repeated each time compare match A occurs.
For details on PWM modes, see section 11.4.5, PWM Modes.
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Section 11 16-Bit Timer Pulse Unit (TPU)
TCNT value
TGRB_0
H'0520
H'0450
H'0200
TGRA_0
Time
H'0000
TGRC_0 H'0200
H'0450
H'0520
Transfer
TGRA_0
H'0200
H'0450
TIOCA
Figure 11.16 Example of Buffer Operation (1)
2. When TGR is an input capture register
Figure 11.17 shows an operation example in which TGRA has been designated as an input
capture register, and buffer operation has been designated for TGRA and TGRC.
Counter clearing by TGRA input capture has been set for TCNT, and both rising and falling
edges have been selected as the TIOCA pin input capture input edge.
As buffer operation has been set, when the TCNT value is stored in TGRA upon occurrence of
input capture A, the value previously stored in TGRA is simultaneously transferred to TGRC.
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Section 11 16-Bit Timer Pulse Unit (TPU)
TCNT value
H'0F07
H'09FB
H'0532
H'0000
Time
TIOCA
H'0532
TGRA
TGRC
H'0F07
H'09FB
H'0532
H'0F07
Figure 11.17 Example of Buffer Operation (2)
11.4.4
Cascaded Operation
In cascaded operation*, two 16-bit counters for different channels are used together as a 32-bit
counter.
This function works by counting the channel 1 (channel 4) counter clock at overflow/underflow of
TCNT_2 (TCNT_5) as set in bits TPSC2 to TPSC0 in TCR.
Underflow occurs only when the lower 16-bit TCNT is in phase-counting mode.
Table 11.29 shows the register combinations used in cascaded operation.
Notes: When phase counting mode is set for channel 1 or 4, the counter clock setting is invalid
and the counter operates independently in phase counting mode.
* Not available in the H8S/2227 Group.
Table 11.29 Cascaded Combinations
Combination
Upper 16 Bits
Lower 16 Bits
Channels 1 and 2
TCNT_1
TCNT_2
Channels 4 and 5
TCNT_4
TCNT_5
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Section 11 16-Bit Timer Pulse Unit (TPU)
Example of Cascaded Operation Setting Procedure: Figure 11.18 shows an example of the
setting procedure for cascaded operation.
[1] Set bits TPSC2 to TPSC0 in the channel 1
(channel 4) TCR to B'1111 to select TCNT_2
(TCNT_5) overflow/underflow counting.
Cascaded operation
Set cascading
[1]
Start count
[2]
[2] Set the CST bit in TSTR for the upper and lower
channel to 1 to start the count operation.
<Cascaded operation>
Figure 11.18 Cascaded Operation Setting Procedure
Examples of Cascaded Operation: Figure 11.19 illustrates the operation when counting upon
TCNT_2 overflow/underflow has been set for TCNT_1, TGRA_1 and TGRA_2 have been
designated as input capture registers, and the TIOC pin rising edge has been selected.
When a rising edge is input to the TIOCA1 and TIOCA2 pins simultaneously, the upper 16 bits of
the 32-bit data are transferred to TGRA_1, and the lower 16 bits to TGRA_2.
TCNT_1
clock
TCNT_1
H'03A1
H'03A2
TCNT_2
clock
TCNT_2
H'FFFF
H'0000
H'0001
TIOCA1,
TIOCA2
TGRA_1
H'03A2
TGRA_2
H'0000
Figure 11.19 Example of Cascaded Operation (1)
Figure 11.20 illustrates the operation when counting upon TCNT_2 overflow/underflow has been
set for TCNT_1, and phase counting mode has been designated for channel 2.
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Section 11 16-Bit Timer Pulse Unit (TPU)
TCNT_1 is incremented by TCNT_2 overflow and decremented by TCNT_2 underflow.
TCLKC
TCLKD
TCNT_2
FFFD
TCNT_1
FFFE
FFFF
0000
0000
0001
0002
0001
0000
0001
FFFF
0000
Figure 11.20 Example of Cascaded Operation (2)
11.4.5
PWM Modes
In PWM mode, PWM waveforms are output from the output pins. 0, 1, or toggle output can be
selected as the output level in response to compare match of each TGR.
Settings of TGR registers can output a PWM waveform in the range of 0% to 100% duty cycle.
Designating TGR compare match as the counter clearing source enables the cycle to be set in that
register. All channels can be designated for PWM mode independently. Synchronous operation is
also possible.
There are two PWM modes, as described below.
• PWM mode 1
PWM output is generated from the TIOCA and TIOCC pins by pairing TGRA with TGRB and
TGRC with TGRD. The outputs specified by bits IOA3 to IOA0 and IOC3 to IOC0 in TIOR
are output from the TIOCA and TIOCC pins at compare matches A and C, respectively. The
outputs specified by bits IOB3 to IOB0 and IOD3 to IOD0 in TIOR are output at compare
matches B and D, respectively. The initial output value is the value set in TGRA or TGRC. If
the set values of paired TGRs are identical, the output value does not change when a compare
match occurs.
In PWM mode 1, a maximum 8-phase PWM output is possible.
• PWM mode 2
PWM output is generated using one TGR as the cycle register and the others as duty cycle
registers. The output specified in TIOR is performed by means of compare matches. Upon
counter clearing by a synchronization register compare match, the output value of each pin is
the initial value set in TIOR. If the set values of the cycle and duty cycle registers are identical,
the output value does not change when a compare match occurs.
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Section 11 16-Bit Timer Pulse Unit (TPU)
In PWM mode 2, a maximum 15-phase PWM output is possible by combined use with
synchronous operation.
The correspondence between PWM output pins and registers is shown in table 11.30.
Table 11.30 PWM Output Registers and Output Pins
Output Pins
Channel
Registers
PWM Mode 1
PWM Mode 2
0
TGRA_0
TIOCA0
TIOCA0
TGRB_0
TGRC_0
TIOCB0
TIOCC0
TGRD_0
1
TGRA_1
TIOCD0
TIOCA1
TGRB_1
2
TGRA_2
TGRA_3
TIOCA2
TIOCA3
TGRA_4
TIOCC3
TGRA_5
TGRB_5
TIOCC3
TIOCD3
TIOCA4
TGRB_4
5*
TIOCA3
TIOCB3
TGRD_3
4*
TIOCA2
TIOCB2
TGRB_3
TGRC_3
TIOCA1
TIOCB1
TGRB_2
3*
TIOCC0
TIOCA4
TIOCB4
TIOCA5
TIOCA5
TIOCB5
Notes: In PWM mode 2, PWM output is not possible for the TGR register in which the cycle is set.
* Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Example of PWM Mode Setting Procedure: Figure 11.21 shows an example of the PWM mode
setting procedure.
[1]
PWM mode
Select the counter clock with bits TPSC2 to
TPSC0 in TCR. At the same time, select the
input clock edge with bits CKEG1 and CKEG0 in
Select counter clock
TCR.
[1]
[2]
Use bits CCLR2 to CCLR0 in TCR to select the
TGR to be used as the TCNT clearing source.
Select counter clearing source
[2]
[3]
Use TIOR to designate the TGR as an output
compare register, and select the initial value and
Select waveform output level
output value.
[3]
[4]
Set the cycle in the TGR selected in [2], and
set the duty in the other TGRs.
Set TGR
[4]
[5]
Select the PWM mode with bits MD3 to MD0 in
TMDR.
Set PWM mode
[5]
[6]
Set the CST bit in TSTR to 1 to start the count
operation.
Start count
[6]
<PWM mode>
Figure 11.21 Example of PWM Mode Setting Procedure
Examples of PWM Mode Operation: Figure 11.22 shows an example of PWM mode 1
operation.
In this example, TGRA compare match is set as the TCNT clearing source, 0 is set for the TGRA
initial output value and output value, and 1 is set as the TGRB output value.
In this case, the value set in TGRA is used as the cycle, and the values set in TGRB registers as
the duty cycle.
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Section 11 16-Bit Timer Pulse Unit (TPU)
TCNT value
Counter cleared by
TGRA compare match
TGRA
TGRB
H'0000
Time
TIOCA
Figure 11.22 Example of PWM Mode Operation (1)
Figure 11.23 shows an example of PWM mode 2 operation.
In this example, synchronous operation is designated for channels 0 and 1, TGRB_1 compare
match is set as the TCNT clearing source, and 0 is set for the initial output value and 1 for the
output value of the other TGR registers (TGRA_0 to TGRD_0, TGRA_1), to output a 5-phase
PWM waveform.
In this case, the value set in TGRB_1 is used as the cycle, and the values set in the other TGRs as
the duty cycle.
Counter cleared by
TGRB_1 compare match
TCNT value
TGRB_1
TGRA_1
TGRD_0
TGRC_0
TGRB_0
TGRA_0
H'0000
Time
TIOCA0
TIOCB0
TIOCC0
TIOCD0
TIOCA1
Figure 11.23 Example of PWM Mode Operation (2)
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Section 11 16-Bit Timer Pulse Unit (TPU)
Figure 11.24 shows examples of PWM waveform output with 0% duty cycle and 100% duty cycle
in PWM mode.
TCNT value
TGRB rewritten
TGRA
TGRB
TGRB rewritten
TGRB
rewritten
H'0000
Time
0% duty
TIOCA
Output does not change when cycle register and duty register
compare matches occur simultaneously
TCNT value
TGRB rewritten
TGRA
TGRB rewritten
TGRB rewritten
TGRB
H'0000
Time
100% duty
TIOCA
Output does not change when cycle register and duty
register compare matches occur simultaneously
TCNT value
TGRB rewritten
TGRA
TGRB rewritten
TGRB
TGRB rewritten
Time
H'0000
TIOCA
100% duty
0% duty
Figure 11.24 Example of PWM Mode Operation (3)
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.4.6
Phase Counting Mode
In phase counting mode, the phase difference between two external clock inputs is detected and
TCNT is incremented/decremented accordingly. In the H8S/2227 Group, this mode can be set for
channels 1 and 2. In other groups, it can be set for channels 1, 2, 4, and 5.
When phase counting mode is set, an external clock is selected as the counter input clock and
TCNT operates as an up/down-counter regardless of the setting of bits TPSC2 to TPSC0 and bits
CKEG1 and CKEG0 in TCR. However, the functions of bits CCLR1 and CCLR0 in TCR, and of
TIOR, TIER, and TGR are valid, and input capture/compare match and interrupt functions can be
used.
This can be used for two-phase encoder pulse input.
When overflow occurs while TCNT is counting up, the TCFV flag in TSR is set; when underflow
occurs while TCNT is counting down, the TCFU flag is set.
The TCFD bit in TSR is the count direction flag. Reading the TCFD flag provides an indication of
whether TCNT is counting up or down.
Table 11.31 shows the correspondence between external clock pins and channels.
Table 11.31 Clock Input Pins in Phase Counting Mode
External Clock Pins
Channels
A-Phase
When channel 1 or 5* is set to phase counting mode
TCLKA
TCLKB
When channel 2 or 4* is set to phase counting mode
TCLKC
TCLKD
Note:
*
Not available in the H8S/2227 Group.
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B-Phase
Section 11 16-Bit Timer Pulse Unit (TPU)
Example of Phase Counting Mode Setting Procedure: Figure 11.25 shows an example of the
phase counting mode setting procedure.
[1] Select phase counting mode with bits MD3 to
MD0 in TMDR.
Phase counting mode
Select phase counting mode
[1]
Start count
[2]
[2] Set the CST bit in TSTR to 1 to start the count
operation.
<Phase counting mode>
Figure 11.25 Example of Phase Counting Mode Setting Procedure
Examples of Phase Counting Mode Operation: In phase counting mode, TCNT counts up or
down according to the phase difference between two external clocks. There are four modes,
according to the count conditions.
1. Phase counting mode 1
Figure 11.26 shows an example of phase counting mode 1 operation, and table 11.32
summarizes the TCNT up/down-count conditions.
TCLKA (channels 1 and 5*)
TCLKC (channels 2 and 4*)
TCLKB (channels 1 and 5*)
TCLKD (channels 2 and 4*)
TCNT value
Up-count
Down-count
Time
Note: * Not available in the H8S/2227 Group.
Figure 11.26 Example of Phase Counting Mode 1 Operation
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.32 Up/Down-Count Conditions in Phase Counting Mode 1
TCLKA (Channels 1 and 5*)
TCLKC (Channels 2 and 4*)
TCLKB (Channels 1 and 5*)
TCLKD (Channels 2 and 4*)
High level
Operation
Up-count
Low level
Low level
High level
High level
Down-count
Low level
High level
Low level
Legend:
: Rising edge
: Falling edge
Note: * Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
2. Phase counting mode 2
Figure 11.27 shows an example of phase counting mode 2 operation, and table 11.33
summarizes the TCNT up/down-count conditions.
TCLKA (channels 1 and 5*)
TCLKC (channels 2 and 4*)
TCLKB (channels 1 and 5*)
TCLKD (channels 2 and 4*)
TCNT value
Up-count
Down-count
Time
Note: * Not available in the H8S/2227 Group.
Figure 11.27 Example of Phase Counting Mode 2 Operation
Table 11.33 Up/Down-Count Conditions in Phase Counting Mode 2
TCLKA (Channels 1 and 5*)
TCLKC (Channels 2 and 4*)
TCLKB (Channels 1 and 5*)
TCLKD (Channels 2 and 4*)
High level
Operation
Don’t care
Low level
Low level
High level
High level
Up-count
Don’t care
Low level
High level
Low level
Down-count
Legend:
: Rising edge
: Falling edge
Note: * Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
3. Phase counting mode 3
Figure 11.28 shows an example of phase counting mode 3 operation, and table 11.34
summarizes the TCNT up/down-count conditions.
TCLKA (channels 1 and 5*)
TCLKC (channels 2 and 4*)
TCLKB (channels 1 and 5*)
TCLKD (channels 2 and 4*)
TCNT value
Down-count
Up-count
Time
Note: * Not available in the H8S/2227 Group.
Figure 11.28 Example of Phase Counting Mode 3 Operation
Table 11.34 Up/Down-Count Conditions in Phase Counting Mode 3
TCLKA (Channels 1 and 5*)
TCLKC (Channels 2 and 4*)
TCLKB (Channels 1 and 5*)
TCLKD (Channels 2 and 4*)
High level
Operation
Don’t care
Low level
Low level
High level
Up-count
High level
Down-count
Low level
Don’t care
High level
Low level
Legend:
: Rising edge
: Falling edge
Note: * Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
4. Phase counting mode 4
Figure 11.29 shows an example of phase counting mode 4 operation, and table 11.35
summarizes the TCNT up/down-count conditions.
TCLKA (channels 1 and 5*)
TCLKC (channels 2 and 4*)
TCLKB (channels 1 and 5*)
TCLKD (channels 2 and 4*)
TCNT value
Down-count
Up-count
Time
Note: * Not available in the H8S/2227 Group.
Figure 11.29 Example of Phase Counting Mode 4 Operation
Table 11.35 Up/Down-Count Conditions in Phase Counting Mode 4
TCLKA (Channels 1 and 5*)
TCLKC (Channels 2 and 4*)
TCLKB (Channels 1 and 5*)
TCLKD (Channels 2 and 4*)
High level
Operation
Up-count
Low level
Low level
Don’t care
High level
High level
Down-count
Low level
High level
Don’t care
Low level
Legend:
: Rising edge
: Falling edge
Note: * Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Phase Counting Mode Application Example: Figure 11.30 shows an example in which phase
counting mode is designated for channel 1, and channel 1 is coupled with channel 0 to input servo
motor 2-phase encoder pulses in order to detect the position or speed.
Channel 1 is set to phase counting mode 1, and the encoder pulse A-phase and B-phase are input
to TCLKA and TCLKB.
Channel 0 operates with TCNT counter clearing by TGRC_0 compare match; TGRA_0 and
TGRC_0 are used for the compare match function, and are set with the speed control cycle and
position control cycle. TGRB_0 is used for input capture, with TGRB_0 and TGRD_0 operating
in buffer mode. The channel 1 counter input clock is designated as the TGRB_0 input capture
source, and detection of the pulse width of 2-phase encoder 4-multiplication pulses is performed.
TGRA_1 and TGRB_1 for channel 1 are designated for input capture, channel 0 TGRA_0 and
TGRC_0 compare matches are selected as the input capture source, and the up/down-counter
values for the control cycles are stored.
This procedure enables accurate position/speed detection to be achieved.
Channel 1
TCLKA
TCLKB
Edge
detection
circuit
TCNT_1
TGRA_1
(speed cycle capture)
TGRB_1
(position cycle capture)
TCNT_0
TGRA_0
(speed control cycle)
+
-
TGRC_0
(position control cycle)
+
-
TGRB_0 (pulse width capture)
TGRD_0 (buffer operation)
Channel 0
Figure 11.30 Phase Counting Mode Application Example
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.5
Interrupt Sources
There are three kinds of TPU interrupt source: TGR input capture/compare match, TCNT
overflow, and TCNT underflow. Each interrupt source has its own status flag and enable/disable
bit, allowing generation of interrupt request signals to be enabled or disabled individually.
When an interrupt request is generated, the corresponding status flag in TSR is set to 1. If the
corresponding enable/disable bit in TIER is set to 1 at this time, an interrupt is requested. The
interrupt request is cleared by clearing the status flag to 0.
Relative channel priorities can be changed by the interrupt controller, but the priority order within
a channel is fixed. For details, see section 5, Interrupt Controller.
Table 11.36 lists the TPU interrupt sources.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Table 11.36 TPU Interrupts
DTC
Activation
DMAC
Activation*1
TGRA_0 input capture/compare match TGFA_0
Possible
Possible
TGI0B
TGRB_0 input capture/compare match TGFB_0
Possible
Not possible
TGI0C
TGRC_0 input capture/compare match TGFC_0
Possible
Not possible
TGI0D
TGRD_0 input capture/compare match TGFD_0
Possible
Not possible
Channel
Name
Interrupt Source
0
TGI0A
1
2
3*
2
2
4*
5*
2
Interrupt
Flag
TGI0V
TCNT_0 overflow
TGI1A
TGRA_1 input capture/compare match TGFA_1
TCFV_0
Possible
Possible
TGI1B
TGRB_1 input capture/compare match TGFB_1
Possible
Not possible
TCI1V
TCNT_1 overflow
TCFV_1
Not possible Not possible
TCI1U
TCNT_1 underflow
TCFU_1
Not possible Not possible
TGI2A
TGRA_2 input capture/compare match TGFA_2
Possible
Possible
TGI2B
TGRB_2 input capture/compare match TGFB_2
Possible
Not possible
TCI2V
TCNT_2 overflow
TCFV_2
Not possible Not possible
TCI2U
TCNT_2 underflow
TCFU_2
Not possible Not possible
TGI3A
TGRA_3 input capture/compare match TGFA_3
Possible
Possible
TGI3B
TGRB_3 input capture/compare match TGFB_3
Possible
Not possible
TGI3C
TGRC_3 input capture/compare match TGFC_3
Possible
Not possible
TGI3D
TGRD_3 input capture/compare match TGFD_3
Possible
Not possible
TCI3V
TCNT_3 overflow
Not possible Not possible
TGI4A
TGRA_4 input capture/compare match TGFA_4
Possible
Possible
TGI4B
TGRB_4 input capture/compare match TGFB_4
Possible
Not possible
TCFV_3
Not possible Not possible
TCI4V
TCNT_4 overflow
TCFV_4
Not possible Not possible
TCI4U
TCNT_4 underflow
TCFU_4
Not possible Not possible
TGI5A
TGRA_5 input capture/compare match TGFA_5
Possible
Possible
TGI5B
TGRB_5 input capture/compare match TGFB_5
Possible
Not possible
TCI5V
TCNT_5 overflow
TCFV_5
Not possible Not possible
TCI5U
TCNT_5 underflow
TCFU_5
Not possible Not possible
Notes: This table shows the initial state immediately after a reset. The relative channel priorities
can be changed by the interrupt controller.
1. Supported only by the H8S/2239 Group.
2. Not available in the H8S/2227 Group.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Input Capture/Compare Match Interrupt: An interrupt is requested if the TGIE bit in TIER is
set to 1 when the TGF flag in TSR is set to 1 by the occurrence of a TGR input capture/compare
match on a particular channel. The interrupt request is cleared by clearing the TGF flag to 0. In the
H8S/2227 Group, the TPU has eight input capture/compare match interrupts, four for channel 0
and two each for channels 1 and 2. In other groups, the TPU has 16 input capture/compare match
interrupts, four each for channels 0 and 3, and two each for channels 1, 2, 4, and 5.
Overflow Interrupt: An interrupt is requested if the TCIEV bit in TIER is set to 1 when the
TCFV flag in TSR is set to 1 by the occurrence of TCNT overflow on a channel. The interrupt
request is cleared by clearing the TCFV flag to 0. In the H8S/2227 Group, the TPU has three
overflow interrupts, one each for channels 0 to 2. In other groups, the TPU has six overflow
interrupts, one each for channels 0 to 5.
Underflow Interrupt: An interrupt is requested if the TCIEU bit in TIER is set to 1 when the
TCFU flag in TSR is set to 1 by the occurrence of TCNT underflow on a channel. The interrupt
request is cleared by clearing the TCFU flag to 0. The TPU of the H8S/2227 Group has two
underflow interrupts, one each for channels 1 and 2. In other groups, the TPU has four underflow
interrupts, one each for channels 1, 2, 4, and 5.
11.6
DTC Activation
The DTC can be activated by the TGR input capture/compare match interrupt for a channel. For
details, see section 9, Data Transfer Controller (DTC).
In the H8S/2227 Group, a total of eight TPU input capture/compare match interrupts can be used
as DTC activation sources, four for channel 0 and two each for channels 1 and 2. In other groups,
a total of 16 TPU input capture/compare match interrupts can be used as DTC activation sources,
four each for channels 0 and 3, and two each for channels 1, 2, 4, and 5.
11.7
DMAC Activation (H8S/2239 Group Only)
The DMAC can be activated by the TGRA input capture/compare match interrupt for a channel.
For details, see section 8, DMA Controller (DMAC).
In the TPU, a total of six TGRA input capture/compare match interrupts can be used as DMAC
activation sources, one for each channel.
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.8
A/D Converter Activation
The A/D converter can be activated by the TGRA input capture/compare match for a channel.
If the TTGE bit in TIER is set to 1 when the TGFA flag in TSR is set to 1 by the occurrence of a
TGRA input capture/compare match on a particular channel, a request to start A/D conversion is
sent to the A/D converter. If the TPU conversion start trigger has been selected on the A/D
converter side at this time, A/D conversion is started.
In the TPU, a total of six TGRA input capture/compare match interrupts can be used as A/D
converter conversion start sources, one for each channel.
11.9
Operation Timing
11.9.1
Input/Output Timing
TCNT Count Timing: Figure 11.31 shows TCNT count timing in internal clock operation, and
figure 11.32 shows TCNT count timing in external clock operation.
φ
Internal clock
Rising edge
Falling edge
TCNT
input clock
TCNT
N−1
N
N+1
Figure 11.31 Count Timing in Internal Clock Operation
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N+2
Section 11 16-Bit Timer Pulse Unit (TPU)
φ
External clock
Rising edge
Falling edge
Falling edge
TCNT
input clock
N−1
TCNT
N
N+1
N+2
Figure 11.32 Count Timing in External Clock Operation
Output Compare Output Timing: A compare match signal is generated in the final state in
which TCNT and TGR match (the point at which the count value matched by TCNT is updated).
When a compare match signal is generated, the output value set in TIOR is output at the output
compare output pin. After a match between TCNT and TGR, the compare match signal is not
generated until the (TIOC pin) TCNT input clock is generated.
Figure 11.33 shows output compare output timing.
φ
TCNT
input clock
TCNT
TGR
N
N+1
N
Compare
match signal
TIOC pin
Figure 11.33 Output Compare Output Timing
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Section 11 16-Bit Timer Pulse Unit (TPU)
Input Capture Signal Timing: Figure 11.34 shows input capture signal timing.
φ
Input capture
input
Input capture
signal
TCNT
N
N+1
N+2
N
TGR
N+2
Figure 11.34 Input Capture Input Signal Timing
Timing for Counter Clearing by Compare Match/Input Capture: Figure 11.35 shows the
timing when counter clearing by compare match occurrence is specified, and figure 11.36 shows
the timing when counter clearing by input capture occurrence is specified.
φ
Compare
match signal
Counter
clear signal
TCNT
N
TGR
N
H'0000
Figure 11.35 Counter Clear Timing (Compare Match)
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Section 11 16-Bit Timer Pulse Unit (TPU)
φ
Input capture
signal
Counter clear
signal
N
TCNT
H'0000
N
TGR
Figure 11.36 Counter Clear Timing (Input Capture)
Buffer Operation Timing: Figures 11.37 and 11.38 show the timings in buffer operation.
φ
TCNT
n
n+1
Compare
match signal
TGRA,
TGRB
n
TGRC,
TGRD
N
N
Figure 11.37 Buffer Operation Timing (Compare Match)
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Section 11 16-Bit Timer Pulse Unit (TPU)
φ
Input capture
signal
TCNT
N
TGRA,
TGRB
n
N+1
TGRC,
TGRD
N
N+1
n
N
Figure 11.38 Buffer Operation Timing (Input Capture)
11.9.2
Interrupt Signal Timing
TGF Flag Setting Timing in Case of Compare Match: Figure 11.39 shows the timing for
setting of the TGF flag in TSR by compare match occurrence, and the TGI interrupt request signal
timing.
φ
TCNT input
clock
TCNT
N
TGR
N
N+1
Compare
match signal
TGF flag
TGI interrupt
Figure 11.39 TGI Interrupt Timing (Compare Match)
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Section 11 16-Bit Timer Pulse Unit (TPU)
TGF Flag Setting Timing in Case of Input Capture: Figure 11.40 shows the timing for setting
of the TGF flag in TSR by input capture occurrence, and the TGI interrupt request signal timing.
φ
Input capture
signal
TCNT
N
TGR
N
TGF flag
TGI interrupt
Figure 11.40 TGI Interrupt Timing (Input Capture)
TCFV Flag/TCFU Flag Setting Timing: Figure 11.41 shows the timing for setting of the TCFV
flag in TSR by overflow occurrence, and the TCIV interrupt request signal timing.
Figure 11.42 shows the timing for setting of the TCFU flag in TSR by underflow occurrence, and
the TCIU interrupt request signal timing.
φ
TCNT input
clock
TCNT
(overflow)
H'FFFF
H'0000
Overflow
signal
TCFV flag
TCIV interrupt
Figure 11.41 TCIV Interrupt Setting Timing
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Section 11 16-Bit Timer Pulse Unit (TPU)
φ
TCNT
input clock
TCNT
(underflow)
H'0000
H'FFFF
Underflow
signal
TCFU flag
TCIU interrupt
Figure 11.42 TCIU Interrupt Setting Timing
Status Flag Clearing Timing: After a status flag is read as 1 by the CPU, it is cleared by writing
0 to it. When the DTC or DMAC* is activated, the flag is cleared automatically. Figure 11.43
shows the timing for status flag clearing by the CPU, and figure 11.44 shows the timing for status
flag clearing by the DTC or DMAC*.
Note: * Supported only by the H8S/2239 Group.
TSR write cycle
T2
T1
φ
TSR address
Address
Write signal
Status flag
Interrupt
request
signal
Figure 11.43 Timing for Status Flag Clearing by CPU
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Section 11 16-Bit Timer Pulse Unit (TPU)
DTC/DMAC*
read cycle
T1
T2
DTC/DMAC*
write cycle
T1
T2
φ
Address
Source address
Destination
address
Status flag
Interrupt
request
signal
Note: * Supported only by the H8S/2239 Group.
Figure 11.44 Timing for Status Flag Clearing by DTC/DMAC* Activation
Note: * Supported only by the H8S/2239 Group.
11.10
Usage Notes
11.10.1 Module Stop Mode Setting
TPU operation can be disabled or enabled using the module stop control register. The initial
setting is for TPU operation to be halted. Register access is enabled by clearing module stop mode.
For details, refer to section 24, Power-Down Modes.
11.10.2 Input Clock Restrictions
The input clock pulse width must be at least 1.5 states in the case of single-edge detection, and at
least 2.5 states in the case of both-edge detection. The TPU will not operate properly with a
narrower pulse width.
In phase counting mode, the phase difference and overlap between the two input clocks must be at
least 1.5 states, and the pulse width must be at least 2.5 states. Figure 11.45 shows the input clock
conditions in phase counting mode.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Overlap
Phase
Phase
diffedifference Overlap rence
Pulse width
Pulse width
TCLKA
(TCLKC)
TCLKB
(TCLKD)
Pulse width
Pulse width
Notes: Phase difference and overlap: 1.5 states or more
Pulse width:
2.5 states or more
Figure 11.45 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode
11.10.3 Caution on Cycle Setting
When counter clearing by compare match is set, TCNT is cleared in the final state in which it
matches the TGR value (the point at which the count value matched by TCNT is updated).
Consequently, the actual counter frequency is given by the following formula:
f=
φ
(N + 1)
Where f: Counter frequency
φ: Operating frequency
N: TGR set value
11.10.4 Contention between TCNT Write and Clear Operations
If the counter clearing signal is generated in the T2 state of a TCNT write cycle, TCNT clearing
takes precedence and the TCNT write is not performed. Figure 11.46 shows the timing in this
case.
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Section 11 16-Bit Timer Pulse Unit (TPU)
TCNT write cycle
T2
T1
φ
TCNT address
Address
Write signal
Counter clearing
signal
TCNT
N
H'0000
Figure 11.46 Contention between TCNT Write and Clear Operations
11.10.5 Contention between TCNT Write and Increment Operations
If incrementing occurs in the T2 state of a TCNT write cycle, the TCNT write takes precedence
and TCNT is not incremented. Figure 11.47 shows the timing in this case.
TCNT write cycle
T2
T1
φ
TCNT address
Address
Write signal
TCNT input
clock
TCNT
N
M
TCNT write data
Figure 11.47 Contention between TCNT Write and Increment Operations
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.10.6 Contention between TGR Write and Compare Match
If a compare match occurs in the T2 state of a TGR write cycle, the TGR write takes precedence
and the compare match signal is disabled. A compare match also does not occur when the same
value as before is written.
Figure 11.48 shows the timing in this case.
TGR write cycle
T2
T1
φ
TGR address
Address
Write signal
Compare
match signal
Prohibited
TCNT
N
N+1
TGR
N
M
TGR write data
Figure 11.48 Contention between TGR Write and Compare Match
11.10.7 Contention between Buffer Register Write and Compare Match
If a compare match occurs in the T2 state of a TGR write cycle, the data transferred to TGR by the
buffer operation will be the data prior to the write.
Figure 11.49 shows the timing in this case.
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Section 11 16-Bit Timer Pulse Unit (TPU)
TGR write cycle
T1
T2
φ
Buffer register
address
Address
Write signal
Compare
match signal
Buffer register write data
Buffer
register
N
M
N
TGR
Figure 11.49 Contention between Buffer Register Write and Compare Match
11.10.8 Contention between TGR Read and Input Capture
If the input capture signal is generated in the T1 state of a TGR read cycle, the data that is read will
be the data after input capture transfer.
Figure 11.50 shows the timing in this case.
TGR read cycle
T1
T2
φ
TGR address
Address
Read signal
Input capture
signal
TGR
X
Internal
data bus
M
M
Figure 11.50 Contention between TGR Read and Input Capture
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.10.9 Contention between TGR Write and Input Capture
If the input capture signal is generated in the T2 state of a TGR write cycle, the input capture
operation takes precedence and the write to TGR is not performed.
Figure 11.51 shows the timing in this case.
TGR write cycle
T1
T2
φ
Address
TGR address
Write signal
Input capture
signal
TCNT
M
M
TGR
Figure 11.51 Contention between TGR Write and Input Capture
11.10.10 Contention between Buffer Register Write and Input Capture
If the input capture signal is generated in the T2 state of a buffer register write cycle, the buffer
operation takes precedence and the write to the buffer register is not performed.
Figure 11.52 shows the timing in this case.
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Section 11 16-Bit Timer Pulse Unit (TPU)
Buffer register write cycle
T1
T2
φ
Buffer register
address
Address
Write signal
Input capture
signal
TCNT
N
M
TGR
Buffer
register
N
M
Figure 11.52 Contention between Buffer Register Write and Input Capture
11.10.11 Contention between Overflow/Underflow and Counter Clearing
If overflow/underflow and counter clearing occur simultaneously, the TCFV/TCFU flag in TSR is
not set and TCNT clearing takes precedence.
Figure 11.53 shows the operation timing when a TGR compare match is specified as the clearing
source, and H'FFFF is set in TGR.
φ
TCNT input
clock
TCNT
H'FFFF
H'0000
Counter
clearing signal
TGF flag
Prohibited
TCFV flag
Figure 11.53 Contention between Overflow and Counter Clearing
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.10.12 Contention between TCNT Write and Overflow/Underflow
If there is an up-count or down-count in the T2 state of a TCNT write cycle, when
overflow/underflow occurs, the TCNT write takes precedence and the TCFV/TCFU flag in TSR is
not set.
Figure 11.54 shows the operation timing when there is contention between TCNT write and
overflow.
TCNT write cycle
T2
T1
φ
TCNT address
Address
Write signal
TCNT
TCNT write data
H'FFFF
TCFV flag
M
Prohibited
Figure 11.54 Contention between TCNT Write and Overflow
11.10.13 Multiplexing of I/O Pins
In this LSI, the TCLKA input pin is multiplexed with the TIOCC0 I/O pin, the TCLKB input pin
with the TIOCD0 I/O pin, the TCLKC input pin with the TIOCB1 I/O pin, and the TCLKD input
pin with the TIOCB2 I/O pin. When an external clock is input, compare match output should not
be performed from a multiplexed pin.
11.10.14 Interrupts and Module Stop Mode
If module stop mode is entered when an interrupt has been requested, it will not be possible to
clear the CPU interrupt source or the DMAC* or DTC activation source. Interrupts should
therefore be disabled before entering module stop mode.
Note: * Supported only by the H8S/2239 Group.
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Section 12 8-Bit Timers
Section 12 8-Bit Timers
The H8S/2258 Group, H8S/2239 Group, and H8S/2238 Group have an on-chip 8-bit timer module
with four channels (TMR_0, TMR_1, TMR_2, and TMR_3) operating on the basis of an 8-bit
counter.
The H8S/2237 Group and H8S/2227 Group have an on-chip 8-bit timer module with two channels
(TMR_0 and TMR_1) operating on the basis of an 8-bit counter.
The 8-bit timer module can be used to count external events and be used as a multifunction timer
in a variety of applications, such as generation of counter reset, interrupt requests, and pulse output
with an arbitrary duty cycle using a compare-match signal with two registers.
12.1
Features
• Selection of clock sources
Selected from three internal clocks (φ/8, φ/64, and φ/8192) and an external clock.
• Selection of three ways to clear the counters
The counters can be cleared on compare-match A or B, or by an external reset signal.
• Timer output controlled by two compare-match signals
The timer output signal in each channel is controlled by two independent compare-match
signals, enabling the timer to be used for various applications, such as the generation of pulse
output or PWM output with an arbitrary duty cycle.
• Cascading of the two channels
 TMR_0 and TMR_1 cascading
The module can operate as a 16-bit timer using TMR_0 as the upper half and channel
TMR_1 as the lower half (16-bit count mode).
TMR_1 can be used to count TMR_0 compare-match occurrences (compare-match count
mode).
 TMR_2* and TMR_3* cascading
The module can operate as a 16-bit timer using TMR_2 as the upper half and channel
TMR_3 as the lower half (16-bit count mode).
TMR_3 can be used to count TMR_2 compare-match occurrences (compare-match count
mode).
• Multiple interrupt sources for each channel
Two compare-match interrupts and one overflow interrupt can be requested independently.
• Generation of A/D conversion start trigger
Channel 0 compare-match signal can be used as the A/D conversion start trigger.
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Section 12 8-Bit Timers
• Module stop mode can be set
At initialization, the 8-bit timer operation is halted. Register access is enabled by canceling the
module stop mode.
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
Figure 12.1 shows a block diagram of the 8-bit timer module (TMR_0 and TMR_1).
Internal clock*
sources
External clock
sources
φ/8
φ/64
φ/8192
TMCI01
Clock 1
Clock 0
Compare-match A1
Compare-match A0
Overflow 1
Overflow 0
TMO
TMRI01
TCORA_0
TCORA_1
Comparator A_0
Comparator A_1
TCNT_0
TCNT_1
Clear 0
Clear 1
Compare-match B1
Compare-match B0
Comparator B_0
Comparator B_1
TCORB_0
TCORB_1
TCSR_0
TCSR_1
TCR_0
TCR_1
Control logic
TMO1
A/D
conversion
start request
signal
Internal bus
Clock select
CMIA0
CMIB0
OVI0
CMIA1
CMIB1
OVI1
Interrupt signals
Legend:
TCORA_0:
TCORB_0:
TCNT_0:
TCSR_0:
TCR_0:
Time constant register A_0
Time constant register B_0
Timer counter _0
Timer control/status register _0
Timer control register _0
TCORA_1:
TCORB_1:
TCNT_1:
TCSR_1:
TCR_1:
Time constant register A_1
Time constant register B_1
Timer counter _1
Timer control/status register _1
Timer control register _1
Note: * When a sub-clock is operating in power-down mode, φ will be fSUB.
Figure 12.1 Block Diagram of 8-Bit Timer Module
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Section 12 8-Bit Timers
12.2
Input/Output Pins
Table 12.1 summarizes the input and output pins of the 8-bit timer module.
Table 12.1 Pin Configuration
Channel
Name
Symbol
I/O
Function
0
Timer output
TMO0
Output
Output controlled by compare-match
1
Timer output
TMO1
Output
Output controlled by compare-match
Common to Timer clock input
0 and 1
Timer reset input
TMCI01
Input
External clock input for the counter
TMRI01
Input
External reset input for the counter
2
Timer output
TMO2*
Output
Output controlled by compare-match
Timer output
TMO3*
Output
Output controlled by compare-match
TMCI23*
Input
External clock input for the counter
TMRI23*
Input
External reset input for the counter
3
Common to Timer clock input
2 and 3
Timer reset input
Note:
12.3
*
Not available in the H8S/2237 Group and H8S/2227 Group.
Register Descriptions
The 8-bit timer has the following registers. For details on the module stop register, refer to section
24.1.2, Module Stop Registers A to C (MSTPCRA to MSTPCRC).
• Time constant register A_0 (TCORA_0)
• Time constant register B_0 (TCORB_0)
• Timer control register_0 (TCR_0)
• Timer control/status register_0 (TCSR_0)
• Timer counter_1 (TCNT_1)
• Time constant register A_1 (TCORA_1)
• Time constant register B_1 (TCORB_1)
• Timer control register_1 (TCR_1)
• Timer control/status register_1 (TCSR_1)
• Timer counter_2 (TCNT_2)*
• Time constant register A_2 (TCORA_2)*
• Time constant register B_2 (TCORB_2)*
• Timer control register_2 (TCR_2)*
• Timer control/status register_2 (TCSR_2)*
• Timer counter_3 (TCNT_3)*
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Section 12 8-Bit Timers
• Time constant register A_3 (TCORA_3)*
• Time constant register B_3 (TCORB_3)*
• Timer control register_3 (TCR_3)*
• Timer control/status register_3 (TCSR_3)*
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
12.3.1
Timer Counter (TCNT)
Each TCNT is an 8-bit up-counter. TCNT_0 and TCNT_1 (TCNT_2 and TCNT_3)* comprise a
single 16-bit register, so they can be accessed together by word access.
TCNT increments on pulses generated from an internal or external clock source. This clock source
is selected by clock select bits CKS2 to CKS0 in TCR. TCNT can be cleared by an external reset
input signal or compare-match signals A and B. Counter clear bits CCLR1 and CCLR0 in TCR
select the method of clearing.
When TCNT overflows from H'FF to H'00, the overflow flag (OVF) in TCSR is set to 1. The
initial value of TCNT is H'00.
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
12.3.2
Time Constant Register A (TCORA)
TCORA is an 8-bit readable/writable register. TCORA_0 and TCORA_1 (TCORA_2 and
TCORA_3)* comprise a single 16-bit register, so they can be accessed together by word access.
TCORA is continually compared with the value in TCNT. When a match is detected, the
corresponding compare-match flag A (CMFA) in TCSR is set. Note, however, that comparison is
disabled during the T2 state of a TCORA write cycle.
The timer output from the TMO pin can be freely controlled by the compare-match signal A and
the settings of output select bits OS1 and OS0 in TCSR.
The initial value of TCORA is H'FF.
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
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Section 12 8-Bit Timers
12.3.3
Time Constant Register B (TCORB)
TCORB is an 8-bit readable/writable register. TCORB_0 and TCORB_1 (TCORB_2 and
TCORB_3)* comprise a single 16-bit register, so they can be accessed together by word access.
TCORB is continually compared with the value in TCNT. When a match is detected, the
corresponding compare-match flag B (CMFB) in TCSR is set. Note, however, that comparison is
disabled during the T2 state of a TCORB write cycle.
The timer output from the TMO pin can be freely controlled by the compare-match signal B and
the settings of output select bits OS1 and OS0 in TCSR.
The initial value of TCORB is H'FF.
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
12.3.4
Timer Control Register (TCR)
TCR selects the TCNT clock source and the time at which TCNT is cleared, and controls interrupt
requests.
Bit
Bit Name
Initial
Value
R/W
Description
7
CMIEB
0
R/W
Compare-Match Interrupt Enable B
Selects whether the CMFB interrupt request (CMIB) is
enabled or disabled when the CMFB flag in TCSR is
set to 1.
0: CMFB interrupt request (CMIB) is disabled
1: CMFB interrupt request (CMIB) is enabled
6
CMIEA
0
R/W
Compare-Match Interrupt Enable A
Selects whether the CMFA interrupt request (CMIA) is
enabled or disabled when the CMFA flag in TCSR is
set to 1.
0: CMFA interrupt request (CMIA) is disabled
1: CMFA interrupt request (CMIA) is enabled
5
OVIE
0
R/W
Timer Overflow Interrupt Enable
Selects whether the OVF interrupt request (OVI) is
enabled or disabled when the OVF flag in TCSR is set
to 1.
0: OVF interrupt request (OVI) is disabled
1: OVF interrupt request (OVI) is enabled
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Section 12 8-Bit Timers
Bit
Bit Name
Initial
Value
R/W
Description
4
CCLR1
0
R/W
Counter Clear 1 and 0
3
CCLR0
0
R/W
These bits select the method by which TCNT is
cleared.
00: Clearing is disabled
01: Cleared on compare-match A
10: Cleared on compare-match B
11: Cleared on rising edge of external reset input
2
CKS2
0
R/W
Clock Select 2 to 0
1
CKS1
0
R/W
0
CKS0
0
R/W
The input clock can be selected from three clocks
divided from the system clock (φ). When use of an
external clock is selected, three types of count can be
selected: at the rising edge, the falling edge, and both
rising and falling edges.
000: Clock input disabled
001: φ /8 internal clock source, counted on the falling
edge
010: φ /64 internal clock source, counted on the falling
edge
011: φ /8192 internal clock source, counted on the
falling edge
100: For channel 0:
1
Counted on TCNT1 overflow signal*
For channel 1:
1
Counted on TCNT0 compare-match A*
2
For channel 2:*
1
Counted on TCNT3 overflow signal*
2
For channel 3:*
1
Counted on TCNT2 compare-match A *
101: External clock source, counted at rising edge
110: External clock source, counted at falling edge
111: External clock source, counted at both rising and
falling edges
Notes: 1. If the count input of channel 0 (channel 2) is the TCNT1 (TCNT3) overflow signal and
that of channel 1 (channel 3) is the TCNT1 (TCNT3) compare-match signal, no
incrementing clock will be generated. Do not use this setting.
2. Not available in the H8S/2237 Group and H8S/2227 Group.
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Section 12 8-Bit Timers
12.3.5
Timer Control/Status Register (TCSR)
TCSR indicates status flags and controls compare-match output.
• TCSR_0
Bit
Bit Name
Initial
Value
R/W
Description
7
CMFB
0
R/(W)*
Compare-Match Flag B
[Setting condition]
When TCNT = TCORB
[Clearing conditions]
6
CMFA
0
R/(W)*
•
Read CMFB when CMFB = 1, then write 0 in
CMFB
•
When DTC is activated by CMIB interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
Compare-Match Flag A
[Setting condition]
When TCNT = TCORA
[Clearing conditions]
5
OVF
0
R/(W)*
•
Read CMFA when CMFA = 1, then write 0 in
CMFA
•
When DTC is activated by CMIA interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
Timer Overflow Flag
[Setting condition]
When TCNT overflows from H'FF to H'00
[Clearing condition]
Read OVF when OVF = 1, then write 0 in OVF
4
ADTE
0
R/W
A/D Trigger Enable
Enables or disables A/D converter start requests by
compare-match A.
0: A/D converter start requests by compare-match A
are disabled
1: A/D converter start requests by compare-match A
are enabled
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Section 12 8-Bit Timers
Bit
Bit Name
Initial
Value
R/W
Description
3
OS3
0
R/W
Output Select 3 and 2
2
OS2
0
R/W
These bits specify how the timer output level is to be
changed by a compare-match B of TCORB and
TCNT.
00: No change when compare-match B occurs
01: 0 is output when compare-match B occurs
10: 1 is output when compare-match B occurs
11: Output is inverted when compare-match B occurs
(toggle output)
1
OS1
0
R/W
Output Select 1 and 0
0
OS0
0
R/W
These bits specify how the timer output level is to be
changed by a compare-match A of TCORA and
TCNT.
00: No change when compare-match A occurs
01: 0 is output when compare-match A occurs
10: 1 is output when compare-match A occurs
11: Output is inverted when compare-match A occurs
(toggle output)
Note:
*
Only 0 can be written to this bit, to clear the flag.
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Section 12 8-Bit Timers
• TCSR_1 and TCSR_3*1
Bit
Bit Name
Initial
Value
R/W
7
CMFB
0
R/(W)*
Description
2
Compare-Match Flag B
[Setting condition]
When TCNT = TCORB
[Clearing conditions]
6
CMFA
0
R/(W)*
2
•
Read CMFB when CMFB = 1, then write 0 in
CMFB
•
When DTC is activated by CMIB interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
Compare-Match Flag A
[Setting condition]
When TCNT = TCORA
[Clearing conditions]
5
OVF
0
R/(W)*
2
•
Read CMFA when CMFA = 1, then write 0 in
CMFA
•
When DTC is activated by CMIA interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
Timer Overflow Flag
[Setting condition]
When TCNT overflows from H'FF to H'00
[Clearing condition]
Read OVF when OVF = 1, then write 0 in OVF
4

1

Reserved
This bit is always read as 1 and cannot be modified.
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Section 12 8-Bit Timers
Bit
Bit Name
Initial
Value
R/W
Description
3
OS3
0
R/W
Output Select 3 and 2
2
OS2
0
R/W
These bits specify how the timer output level is to be
changed by a compare-match B of TCORB and
TCNT.
00: No change when compare-match B occurs
01: 0 is output when compare-match B occurs
10: 1 is output when compare-match B occurs
11: Output is inverted when compare-match B occurs
(toggle output)
1
OS1
0
R/W
Output Select 1 and 0
0
OS0
0
R/W
These bits specify how the timer output level is to be
changed by a compare-match A of TCORA and
TCNT.
00: No change when compare-match A occurs
01: 0 is output when compare-match A occurs
10: 1 is output when compare-match A occurs
11: Output is inverted when compare-match A occurs
(toggle output)
Notes: 1. Not available in the H8S/2237 Group and H8S/2227 Group.
2. Only 0 can be written to this bit, to clear the flag.
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Section 12 8-Bit Timers
• TCSR_2*1
Bit
Bit Name
Initial
Value
R/W
7
CMFB
0
R/(W)*
Description
2
Compare-Match Flag B
[Setting condition]
When TCNT = TCORB
[Clearing conditions]
6
CMFA
0
R/(W)*
2
•
Read CMFB when CMFB = 1, then write 0 in
CMFB
•
When DTC is activated by CMIB interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
Compare-Match Flag A
[Setting condition]
When TCNT = TCORA
[Clearing conditions]
5
OVF
0
R/(W)*
2
•
Read CMFA when CMFA = 1, then write 0 in
CMFA
•
When DTC is activated by CMIA interrupt while
DISEL bit of MRB in DTC is 0 with the transfer
counter not being 0
Timer Overflow Flag
[Setting condition]
When TCNT overflows from H'FF to H'00
[Clearing condition]
Read OVF when OVF = 1, then write 0 in OVF
4

0
R/W
Reserved
This bit is a readable/writable bit, but the write value
should always be 0.
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Section 12 8-Bit Timers
Bit
Bit Name
Initial
Value
R/W
Description
3
OS3
0
R/W
Output Select 3 and 2
2
OS2
0
R/W
These bits specify how the timer output level is to be
changed by a compare-match B of TCORB and
TCNT.
00: No change when compare-match B occurs
01: 0 is output when compare-match B occurs
10: 1 is output when compare-match B occurs
11: Output is inverted when compare-match B occurs
(toggle output)
1
OS1
0
R/W
Output Select 1 and 0
0
OS0
0
R/W
These bits specify how the timer output level is to be
changed by a compare-match A of TCORA and
TCNT.
00: No change when compare-match A occurs
01: 0 is output when compare-match A occurs
10: 1 is output when compare-match A occurs
11: Output is inverted when compare-match A occurs
(toggle output)
Notes: 1. Not available in the H8S/2237 Group and H8S/2227 Group.
2. Only 0 can be written to this bit, to clear the flag.
12.4
Operation
12.4.1
Pulse Output
Figure 12.2 shows an example of arbitrary duty pulse output.
1. Set TCR in CCR1 to 0 and CCLR0 to 1 to clear TCNT by a TCORA compare-match.
2. Set OS3 to OS0 bits in TCSR to B'0110 to output 1 by a compare-match A and 0 by comparematch B.
By the above settings, waveforms with the cycle of TCORA and the pulse width of TCRB can be
output without software intervention.
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Section 12 8-Bit Timers
TCNT
H'FF
Counter clear
TCORA
TCORB
H'00
TMO
Figure 12.2 Example of Pulse Output
12.5
Operation Timing
12.5.1
TCNT Incrementation Timing
Figure 12.3 shows the TCNT count timing with internal clock source. Figure 12.4 shows the
TCNT incrementation timing with external clock source. The pulse width of the external clock for
incrementation at signal edge must be at least 1.5 system clock (φ) periods, and at least 2.5 states
for incrementation at both edges. The counter will not increment correctly if the pulse width is less
than these values.
φ
Internal clock
TCNT input
clock
TCNT
N−1
N
N+1
Figure 12.3 Count Timing for Internal Clock Input
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Section 12 8-Bit Timers
φ
External clock
input pin
TCNT input
clock
N−1
TCNT
N
N+1
Figure 12.4 Count Timing for External Clock Input
12.5.2
Timing of CMFA and CMFB Setting when a Compare-Match Occurs
The CMFA and CMFB flags in TCSR are set to 1 by a compare-match signal generated when the
TCOR and TCNT values match. The compare-match signal is generated at the last state in which
the match is true, just before the timer counter is updated. Therefore, when TCOR and TCNT
match, the compare-match signal is not generated until the next incrementation clock input. Figure
12.5 shows the timing of CMF flag setting.
φ
TCNT
N
TCOR
N
Compare-match
signal
CMF
Figure 12.5 Timing of CMF Setting
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N+1
Section 12 8-Bit Timers
12.5.3
Timing of Timer Output when a Compare-Match Occurs
When a compare-match occurs, the timer output changes as specified by the output select bits
(OS3 to OS0) in TCSR. Figure 12.6 shows the timing when the output is set to toggle at comparematch A.
φ
Compare-match A
signal
Timer output
pin
Figure 12.6 Timing of Timer Output
12.5.4
Timing of Compare-Match Clear when a Compare-Match Occurs
TCNT is cleared when compare-match A or B occurs, depending on the setting of the CCLR1 and
CCLR0 bits in TCR. Figure 12.7 shows the timing of this operation.
φ
Compare-match
signal
TCNT
N
H'00
Figure 12.7 Timing of Compare-Match Clear
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Section 12 8-Bit Timers
12.5.5
TCNT External Reset Timing
TCNT is cleared at the rising edge of an external reset input, depending on the settings of the
CCLR1 and CCLR0 bits in TCR. The width of the clearing pulse must be at least 1.5 states. Figure
12.8 shows the timing of this operation.
φ
External reset
input pin
Clear signal
N−1
TCNT
N
H'00
Figure 12.8 Timing of Clearing by External Reset Input
12.5.6
Timing of Overflow Flag (OVF) Setting
OVF in TCSR is set to 1 when the timer count overflows (changes from H'FF to H'00). Figure
12.9 shows the timing of this operation.
φ
TCNT
H'FF
H'00
Overflow signal
OVF
Figure 12.9 Timing of OVF Setting
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Section 12 8-Bit Timers
12.6
Operation with Cascaded Connection
If bits CKS2 to CKS0 in one of TCR_0 and TCR_1 (TCR_2 and TCR_3)* are set to B'100, the 8bit timers of the two channels are cascaded. With this configuration, a single 16-bit timer can be
used (16-bit timer mode) or compare-matches of 8-bit channel 0 (channel 2)* can be counted by
the timer of channel 1 (channel 3)* (compare-match count mode). In the case that channel 0 is
connected to channel 1 in cascade, the timer operates as described below.
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
12.6.1
16-Bit Count Mode
When bits CKS2 to CKS0 in TCR_0 are set to B'100, the timer functions as a single 16-bit timer
with channel 0 occupying the upper 8 bits and channel 1 occupying the lower 8 bits.
• Setting of compare-match flags
 The CMF flag in TCSR_0 is set to 1 when a 16-bit compare-match occurs.
 The CMF flag in TCSR_1 is set to 1 when a lower 8-bit compare-match occurs.
• Counter clear specification
 If the CCLR1 and CCLR0 bits in TCR_0 have been set for counter clear at compare-match,
the 16-bit counter (TCNT_0 and TCNT_1 together) is cleared when a 16-bit comparematch occurs. The 16-bit counter (TCNT_0 and TCNT_1 together) is cleared even if
counter clear by the TMRI01 pin has also been set.
 The settings of the CCLR1 and CCLR0 bits in TCR_1 are ignored. The lower 8 bits cannot
be cleared independently.
• Pin output
 Control of output from the TMO0 pin by bits OS3 to OS0 in TCSR_0 is in accordance with
the 16-bit compare-match conditions.
 Control of output from the TMO1 pin by bits OS3 to OS0 in TCSR_1 is in accordance with
the lower 8-bit compare-match conditions.
12.6.2
Compare-Match Count Mode
When bits CKS2 to CKS0 in TCR_1 are B'100, TCNT_1 counts compare-match A for channel 0.
Channels 0 and 1 are controlled independently. Conditions such as setting of the CMF flag,
generation of interrupts, output from the TMO pin, and counter clearing are in accordance with the
settings for each channel.
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Section 12 8-Bit Timers
12.7
Interrupt Sources
12.7.1
Interrupt Sources and DTC Activation
The 8-bit timer can generate three types of interrupt: CMIA, CMIB, and OVI. Table 12.2 shows
the interrupt sources and priority. Each interrupt source can be enabled or disabled independently
by interrupt enable bits in TCR. Independent signals are sent to the interrupt controller for each
interrupt. It is also possible to activate the DTC by means of CMIA and CMIB interrupts.
Table 12.2 8-Bit Timer Interrupt Sources
Interrupt source Description
Flag
Interrupt
DTC Activation Priority
CMIA0
TCORA_0 compare-match
CMFA
Possible
CMIB0
TCORB_0 compare-match
CMFB
Possible
OVI0
TCNT_0 overflow
OVF
Not possible
Low
CMIA1
TCORA_1 compare-match
CMFA
Possible
High
CMIB1
TCORB_1 compare-match
CMFB
Possible
OVI1
TCNT_1 overflow
OVF
Not possible
Low
CMIA2*
TCORA_2 compare-match
CMFA
Possible
High
CMIB2*
TCORB_2 compare-match
CMFB
Possible
OVI2*
TCNT_2 overflow
OVF
Not possible
Low
CMIA3*
TCORA_3 compare-match
CMFA
Possible
High
CMIB3*
OVI3*
TCORB_3 compare-match
CMFB
Possible
TCNT_3 overflow
OVF
Not possible
Note:
12.7.2
*
High
Low
Not available in the H8S/2237 Group and H8S/2227 Group.
A/D Converter Activation
The A/D converter can be activated only by channel 0 compare match A.
If the ADTE bit in TCSR0 is set to 1 when the CMFA flag is set to 1 by the occurrence of channel
0 compare match A, a request to start A/D conversion is sent to the A/D converter. If the 8-bit
timer conversion start trigger has been selected on the A/D converter side at this time, A/D
conversion is started.
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Section 12 8-Bit Timers
12.8
Usage Notes
12.8.1
Contention between TCNT Write and Clear
If a timer counter clock pulse is generated during the T2 state of a TCNT write cycle, the clear
takes priority, so that the counter is cleared and the write is not performed. Figure 12.10 shows this
operation.
TCNT write cycle by CPU
T1
T2
φ
Address
TCNT address
Internal write signal
Counter clear signal
TCNT
N
H'00
Figure 12.10 Contention between TCNT Write and Clear
12.8.2
Contention between TCNT Write and Increment
If a timer counter clock pulse is generated during the T2 state of a TCNT write cycle, the write
takes priority and the counter is not incremented. Figure 12.11 shows this operation.
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Section 12 8-Bit Timers
TCNT write cycle by CPU
T1
T2
φ
Address
TCNT address
Internal write signal
TCNT input clock
TCNT
N
M
Counter write data
Figure 12.11 Contention between TCNT Write and Increment
12.8.3
Contention between TCOR Write and Compare-Match
During the T2 state of a TCOR write cycle, the TCOR write has priority even if a compare-match
occurs and the compare-match signal is disabled. Figure 12.12 shows this operation.
TCOR write cycle by CPU
T1
T2
φ
Address
TCOR address
Internal write signal
TCNT
N
N+1
TCOR
N
M
TCOR write data
Compare-match signal
Prohibited
Figure 12.12 Contention between TCOR Write and Compare-Match
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Section 12 8-Bit Timers
12.8.4
Contention between Compare-Matches A and B
If compare-matches A and B occur at the same time, the 8-bit timer operates in accordance with
the priorities for the output states set for compare-match A and compare-match B, as shown in
table 12.3.
Table 12.3 Timer Output Priorities
Output Setting
Priority
Toggle output
High
1 output
0 output
No change
12.8.5
Low
Switching of Internal Clocks and TCNT Operation
TCNT may increment erroneously when the internal clock is switched over. Table 12.4 shows the
relationship between the timing at which the internal clock is switched (by writing to the CKS1
and CKS0 bits) and the TCNT operation
When the TCNT clock is generated from an internal clock, the falling edge of the internal clock
pulse is detected. If clock switching causes a change from high to low level, as shown in no. 3 in
table 12.4, a TCNT clock pulse is generated on the assumption that the switchover is a falling
edge. This increments TCNT.
Erroneous incrementation can also happen when switching between internal and external clocks.
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Section 12 8-Bit Timers
Table 12.4 Switching of Internal Clock and TCNT Operation
No.
Timing of Switchover by Means
of CKS1 and CKS0 Bits
1
1
Switching from low to low*
TCNT Clock Operation
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
N
N+1
CKS bit rewrite
2
Switching from low to high
*2
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
N
N+1
N+2
CKS bit rewrite
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Section 12 8-Bit Timers
No.
Timing of Switchover by Means
of CKS1 and CKS0 Bits
3
3
Switching from high to low*
TCNT Clock Operation
Clock before
switchover
Clock after
switchover
*4
TCNT clock
TCNT
N
N+1
N+2
CKS bit rewrite
4
Switching from high to high
Clock before
switchover
Clock after
switchover
TCNT clock
TCNT
N
N+1
N+2
CKS bit rewrite
Notes: 1.
2.
3.
4.
12.8.6
Includes switching from low to stop, and from stop to low.
Includes switching from stop to high.
Includes switching from high to stop.
Generated on the assumption that the switchover is a falling edge; TCNT is
incremented.
Contention between Interrupts and Module Stop Mode
If module stop mode is entered when an interrupt has been requested, it will not be possible to
clear the CPU interrupt source or the DTC activation source. Interrupts should therefore be
disabled before entering module stop mode.
12.8.7
Mode Setting of Cascaded Connection
When the 16-bit count mode and the compare-match count mode are set at the same time, input
clocks for TCNT_0 and TCNT_1 (TCNT_2 and TCNT_3)* are not generated and the timer stops
incrementation. This setting is prohibited.
Note: * Not available in the H8S/2237 Group and H8S/2227 Group.
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Section 12 8-Bit Timers
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Section 13 Watchdog Timer (WDT)
Section 13 Watchdog Timer (WDT)
The watchdog timer (WDT) is an 8-bit timer that can generate an internal reset signal for this LSI
if a system crash prevents the CPU from writing to the timer counter, thus allowing it to overflow.
When this watchdog function is not needed, the WDT can be used as an interval timer. In interval
timer operation, an interval timer interrupt is generated each time the counter overflows.
The block diagram of the WDT is shown in figure 13.1.
13.1
Features
• Selectable from 8 counter input clocks for WDT_0
Selectable from 16 counter input clocks for WDT_1
• Switchable between watchdog timer mode and interval timer mode
In watchdog timer mode
• Choosable between power-on reset or manual reset as internal reset
• If the counter in WDT_0 overflows, it is possible to select whether this LSI is internally reset
or not
• If the counter in WDT_1 overflows, it is possible to select whether this LSI is internally reset
or the internal NMI interrupt is generated
In interval timer mode
• If the counter overflows, the WDT generates an interval timer interrupt (WOVI)
• The selected clock can be output from the BUZZ output pin (WDT_1)
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Section 13 Watchdog Timer (WDT)
WOVI
(interrupt request
signal)
Internal reset signal*1
Clock
Clock
select
Reset
control
RSTCSR
TCNT_0
φ/2
φ/64
φ/128
φ/512
φ/2048
φ/8192
φ/32768
φ/131072
Internal clock
sources*2
TCSR_0
Module bus
Bus
interface
WDT
Legend:
TCSR_0: Timer control/status register0
TCNT_0: Timer counter0
RSTCSR: Reset control/status register
Notes: 1. The type of internal reset signal depends on a register setting.
The power-on reset or manual reset can be selected as the internal reset.
2. When a sub-clock is operating in power-down mode, φ will be φSUB.
Figure 13.1 Block Diagram of WDT_0 (1)
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Internal bus
Overflow
Interrupt
control
Section 13 Watchdog Timer (WDT)
Interrupt
control
Internal NMI
(interrupt request signal)
Overflow
Clock
select
Clock
Reset
control
Internal reset signal*
TCNT_1
BUZZ
φ/2
φ/64
φ/128
φ/512
φ/2048
φ/8192
φ/32768
φ/131072
Internal clock
sources
TCSR_1
Bus
interface
Module bus
φSUB/2
φSUB/4
φSUB/8
φSUB/16
φSUB/32
φSUB/64
φSUB/128
φSUB/256
Internal bus
WOVI
(interrupt request
signal)
WDT
Legend:
TCSR_1: Timer control/status register1
TCNT_1: Timer counter1
Note: * The type of internal reset signal depends on a register setting.
Caused reset is the power-on reset.
Figure 13.1 Block Diagram of WDT_1 (2)
13.2
Input/Output Pins
Table 13.1 Pin Configuration
Name
Symbol
I/O
Function
Buzzer Output
BUZZ
Output
Output the clock selected by WDT_1
13.3
Register Descriptions
The WDT has the following three registers. To prevent accidental overwriting, TCSR, TCNT, and
RSTCSR have to be written to by a different method to normal registers. For details, refer to
section 13.6.1, Notes on Register Access. For details on the system control register and pin
function control register, refer to section 3.2.2, System Control Register (SYSCR) and section
7.3.6, Pin Function Control Register (PFCR), respectively.
• Timer counter (TCNT)
• Timer control/status register (TCSR)
• Reset control/status register (RSTCSR)
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Section 13 Watchdog Timer (WDT)
13.3.1
Timer Counter (TCNT)
TCNT is an 8-bit readable/writable up-counter. TCNT is initialized to H'00 when the TME bit in
TCSR is cleared to 0.
13.3.2
Timer Control/Status Register (TCSR)
TCSR functions include selecting the clock source to be input to TCNT and the timer mode.
• TCSR_0
Bit
7
Bit Name
OVF
Initial
Value
0
R/W
R/(W)
Description
*1
Overflow Flag
Indicates that TCNT has overflowed. Only a 0 can
be written to this bit, to clear the flag.
[Setting condition]
When TCNT overflows (changes from H'FF to
H'00)
When internal reset request generation is selected
in watchdog timer mode, OVF is cleared
automatically by the internal reset.
[Clearing condition]
2
Cleared by reading TCSR* when OVF = 1, then
writing 0 to OVF
6
WT/IT
0
R/W
Timer Mode Select
Selects whether the WDT is used as a watchdog
timer or interval timer.
0: Interval timer mode (an interval timer interrupt
(WOVI) is requested to CPU)
1: Watchdog timer mode (internal reset selectable)
5
TME
0
R/W
Timer Enable
When this bit is set to 1, TCNT starts counting.
When this bit is cleared, TCNT stops counting and
is initialized to H'00.
4, 3

All 1

Reserved
These bits are always read as 1 and cannot be
modified.
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Section 13 Watchdog Timer (WDT)
Bit
Bit Name
Initial
Value
R/W
Description
2
CKS2
0
R/W
Clock Select 0 to 2
1
CKS1
0
R/W
0
CKS0
0
R/W
Selects the clock source to be input to TCNT. The
3
overflow frequency* for φ = 10 MHz is enclosed in
parentheses.
000: Clock φ/2 (frequency: 51.2 µs)
001: Clock φ/64 (frequency: 1.6 ms)
010: Clock φ/128 (frequency: 3.2 ms)
011: Clock φ/512 (frequency: 13.2 ms)
100: Clock φ/2048 (frequency: 52.4 ms)
101: Clock φ/8192 (frequency: 209.8 ms)
110: Clock φ/32768 (frequency: 838.8 ms)
111: Clock φ/131072 (frequency: 3.36 s)
Notes: 1. Only 0 can be written, for flag clearing.
2. When the OVF flag is polled with the interval timer interrupt disabled, read the OVF bit
while it is 1 at least twice.
3. The overflow period is the time from when TCNT starts counting up from H'00 until
overflow occurs.
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Section 13 Watchdog Timer (WDT)
• TCSR_1
Bit
Bit Name
Initial
Value
7
OVF
0
R/W
Description
R/(W)
*1
Overflow Flag
Indicates that TCNT has overflowed. Only a 0 can
be written to this bit, to clear the flag.
[Setting condition]
When TCNT overflows (changes from H'FF to
H'00)
When internal reset request generation is selected
in watchdog timer mode, OVF is cleared
automatically by the internal reset.
[Clearing condition]
2
Cleared by reading TCSR* when OVF = 1, then
writing 0 to OVF
6
WT/IT
0
R/W
Timer Mode Select
Selects whether the WDT is used as a watchdog
timer or interval timer.
0: Interval timer mode (an interval timer interrupt
(WOVI) is requested to CPU)
1: Watchdog timer mode (a power-on reset or NMI
interrupt is requested to CPU)
5
TME
0
R/W
Timer Enable
When this bit is set to 1, TCNT starts counting.
When this bit is cleared, TCNT stops counting and
is initialized to H'00.
4
PSS
0
R/W
Prescaler Select
Selects the clock source input to TCNT of WDT_1
0: TCNT counts divided clock of φ-base prescaler
(PSM)
1: TCNT counts divided clock of φSUB-base
prescaler (PSS)
3
RST/NMI
0
R/W
Reset or NMI (RST/NMI)
When TCNT overflows in watchdog timer mode,
either a power-on reset or NMI interrupt is
selected.
0: An NMI interrupt is requested
1: Reset is requested
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Section 13 Watchdog Timer (WDT)
Bit
Bit Name
Initial
Value
R/W
Description
2
CKS2
0
R/W
Clock Select 0 to 2
1
CKS1
0
R/W
0
CKS0
0
R/W
Selects the clock source to be input to TCNT. The
3
overflow frequency* for φ = 10 MHz is enclosed in
parentheses.
When PSS = 0:
000: Clock φ/2 (frequency: 51.2 µs)
001: Clock φ/64 (frequency: 1.6 ms)
010: Clock φ/128 (frequency: 3.2 ms)
011: Clock φ/512 (frequency: 13.2 ms)
100: Clock φ/2048 (frequency: 52.4 ms)
101: Clock φ/8192 (frequency: 209.8 ms)
110: Clock φ/32768 (frequency: 838.8 ms)
111: Clock φ/131072 (frequency: 3.36 s)
When PSS = 1:
000: Clock φSUB/2 (frequency: 15.6 ms)
001: Clock φSUB/4 (frequency: 31.3 ms)
010: Clock φSUB/8 (frequency: 62.5 ms)
011: Clock φSUB/16 (frequency: 125 ms)
100: Clock φSUB/32 (frequency: 250 ms)
101: Clock φSUB/64 (frequency: 500 ms)
110: Clock φSUB/128 (frequency: 1 s)
111: Clock φSUB/256 (frequency: 2 s)
Notes: 1. Only 0 can be written, for flag clearing.
2. When the OVF flag is polled with the interval timer interrupt disabled, read the OVF bit
while it is 1 at least twice
3. The overflow period is the time from when TCNT starts counting up from H'00 until
overflow occurs.
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Section 13 Watchdog Timer (WDT)
13.3.3
Reset Control/Status Register (RSTCSR) (only WDT_0)
RSTCSR controls the generation of the internal reset signal when TCNT overflows, and selects
the type of internal reset signal. RSTCSR is initialized to H'1F by a reset signal from the RES pin,
and not by the WDT internal reset signal caused by overflows.
Bit
Bit Name
7
WOVF
Initial
Value
R/W
Description
0
R/(W)*
Watchdog Overflow Flag
This bit is set when TCNT overflows in watchdog
timer mode. This bit cannot be set in interval timer
mode, and only 0 can be written, to clear the flag.
[Setting condition]
Set when TCNT overflows (changed from H'FF to
H'00) in watchdog timer mode
[Clearing condition]
Cleared by reading RSTCSR when WOVF = 1,
and then writing 0 to WOVF
6
RSTE
0
R/W
Reset Enable
Specifies whether or not a reset signal is
generated in the chip if TCNT overflows during
watchdog timer operation.
0: Reset signal is not generated even if TCNT
overflows (Though this LSI is not reset, TCNT
and TCSR in WDT are reset)
1: Reset signal is generated if TCNT overflows
5
RSTS
0
R/W
Reset Select
This bit selects the type of the internal reset that is
generated by TCNT overflowing in watchdog timer
mode.
0: Power-on reset
1: Manual reset

4 to 0
All 1

Reserved
These bits are always read as 1 and cannot be
modified.
Note:
*
Only 0 can be written, to clear the flag.
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Section 13 Watchdog Timer (WDT)
13.4
Operation
13.4.1
Watchdog Timer Mode
To use the WDT as a watchdog timer, set the WT/IT bit in TCSR and the TME bit to 1.
Software must prevent TCNT overflows by rewriting the TCNT value (normally be writing H'00)
before overflows occurs. Thus, TCNT does not overflow while the system is operating normally.
When the WDT is used as a watchdog timer and the RSTE bit in RSTCSR of WDT_0 is set to 1,
and if TCNT overflows without being rewritten because of a system malfunction or other error, an
internal reset signal for this LSI is output for 518 system clocks.
When the RST/NMI bit in TCSR of WDT_1 is set to 1, and if TCNT overflows, the internal reset
signal is output for 516 system clock periods. When the RST/NMI bit is cleared to 0, an NMI
interrupt request is generated (for 515 or 516 system clock periods when the clock source is set to
φSUB (PSS = 1)).
An internal reset request from the watchdog timer and a reset input from the RES pin are both
treated as having the same vector. If a WDT internal reset request and the RES pin reset occur at
the same time, the RES pin reset has priority and the WOVF bit in RSTCSR is cleared to 0.
An NMI request from the watchdog timer and an interrupt request from the NMI pin are both
treated as having the same vector. So, avoid handling an NMI request from the watchdog timer
and an interrupt request from the NMI pin at the same time.
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Section 13 Watchdog Timer (WDT)
TCNT value
Overflow
H'FF
Time
H'00
WT/IT=1
TME=1
Write H'00'
to TCNT
WOVF=1
WT/IT=1
TME=1
Write H'00'
to TCNT
internal reset is
generated
Internal reset signal*
Legend:
WT/IT: Timer mode select bit
TME: Timer enable bit
WOVF: Overflow flag
518 system clock (WDT0)
515/516 system clock (WDT1)
Note: * In the case of WDT_0, the internal reset signal is generated only when the RSTE bit is set to 1.
In the case of WDT_1,either the internal reset or the NMI interrupt is generated.
Figure 13.2 Watchdog Timer Mode Operation
13.4.2
Interval Timer Mode
To use the WDT as a watchdog timer, set the WT/IT and TME bits in TCSR to 1.
When the WDT is used as an interval timer, an interval timer interrupt (WOVI) is generated each
time the TCNT overflows. (The NMI interrupt is not generated.) Therefore, an interrupt can be
generated at intervals.
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Section 13 Watchdog Timer (WDT)
TCNT value
Overflow
H'FF
Overflow
Overflow
Overflow
Time
H'00
WT/IT=0
TME=1
WOVI
WOVI
WOVI
WOVI
Legend:
WOVI: Interval timer interrupt request generation
Figure 13.3 Interval Timer Mode Operation
13.4.3
Timing of Setting Overflow Flag (OVF)
The OVF flag is set to 1 if TCNT overflows during interval timer operation. At the same time, an
interval timer interrupt (WOVI) is requested. This timing is shown in figure 13.4.
When NMI request is chosen in watchdog timer mode for WDT_1, TCNT overflow sets the OVF
flog to 1. At the same time, NMI interrupt is requested.
φ
TCNT
H'FF
H'00
Overflow signal
(internal signal)
OVF
Figure 13.4 Timing of OVF Setting
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Section 13 Watchdog Timer (WDT)
13.4.4
Timing of Setting Watchdog Timer Overflow Flag (WOVF)
With WDT_0 the WOVF bit in RSTCSR is set to 1 if TCNT overflows in watchdog timer mode.
If TCNT overflows while the RSTE bit in RSTCSR is set to 1, an internal is generated for the
entire chip. (The WOVI interrupt is not generated.) This timing is illustrated in figure 13.5.
φ
TCNT
H'FF
H'00
Overflow signal
(internal signal)
WOVF
Internal reset
signal
518 states (WDT_0)
515/516 states (WDT_1)
Figure 13.5 Timing of WOVF Setting
13.5
Interrupt Sources
During interval timer mode operation, an overflow generates an interval timer interrupt (WOVI).
The interval timer interrupt is requested whenever the OVF flag is set to 1 in TCSR. OVF must be
cleared to 0 in the interrupt handling routine.
If an NMI interrupt request has been chosen in the watchdog timer mode, an NMI interrupt request
is generated when a TCNT overflow occurs.
Table 13.2 WDT Interrupt Source
Name
Interrupt Source
Interrupt Flag
WOVI
TCNT overflow (interval timer mode)
OVF
NMI
TCNT overflow (watchdog timer mode)
OVF
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Section 13 Watchdog Timer (WDT)
13.6
Usage Notes
13.6.1
Notes on Register Access
The write method for TCNT, TCSR, and RSTCSR differs from that of normal registers so that
they cannot be easily rewritten. Use the following procedures to read and write these registers.
(1) Writing to TCNT and TCSR
Word transfer instructions must be used to write to TCNT and TCSR. These registers cannot be
written with byte transfer instructions. This is shown in figure 13.6.
For writing, TCNT and TCSR are allocated to the same address. To write to TCNT, transfer a
word in which the upper byte is H'5A and the lower byte is the write data. To write to TCSR,
transfer a word in which the upper byte is H'A5 and the lower byte is the write data. When these
transfer operations are performed, the lower byte data is written to TCNT or TCSR.
TCNT write
Address: H'FF74
15
8
7
H'5A
0
Write data
TCSR write
Address: H'FF74
15
8
H'A5
7
0
Write data
Figure 13.6 Writing to TCNT, TCSR
(2) Writing to RSTCSR
Use word transfer operations to write to RSTCSR. This register cannot be written using byte
transfer instructions. This is shown in figure 13.7.
The method used to write a 0 to the WOVF bit and the method used to write the RSTE and RSTS
bits are different.
To write a 0 to the WOVF bit, set the upper byte to H'A5 and the lower byte to H'00 and transfer
that data. This will clear the WOVF bit to 0. This operation does not affect the RSTE and RSTS
bits. To write the RSTE and RSTS bits, set the upper byte to H'5A and the lower byte to the data
to be written and transfer that data. This will write the data in bits 6 and 5 of the lower byte to the
RSTE and RSTS bits. This operation does not affect the WOVF bit.
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Section 13 Watchdog Timer (WDT)
When writing 0 to the WOVF bit
Address: H'FF76
15
8
7
H'A5
0
H'00
When writing to the RSTE and RSTS bits
15
8
Address: H'FF76
H'5A
7
0
Write data
Figure 13.7 Writing to RSTCSR
(3) Reading from TCNT, TCSR, and RSTCSR
These registers can be read in the same way normal registers are read. TCSR is allocated at
address H'FF74, TCNT at address H'FF75, and RSTCSR at address H'FF77.
13.6.2
Contention between Timer Counter (TCNT) Write and Increment
If a timer counter clock pulse is generated during the T2 state of a TCNT write cycle, the write
takes priority and the timer counter is not incremented. Figure 13.8 shows this operation.
TCNT write cycle
T1
T2
φ
Address
Internal write signal
TCNT input clock
TCNT
N
M
Counter write data
Figure 13.8 Contention between TCNT Write and Increment
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Section 13 Watchdog Timer (WDT)
13.6.3
Changing Value of CKS2 to CKS0
If bits CKS0 to CKS2 in TCSR are written to while the WDT is operating, errors could occur in
the incrementation. Software must be used to stop the watchdog timer (by clearing the TME bit to
0) before changing the value of bits CKS0 to CKS2.
13.6.4
Switching between Watchdog Timer Mode and Interval Timer Mode
If the mode is switched from watchdog timer to interval timer while the WDT is operating, errors
could occur in the incrementation. Software must be used to stop the watchdog timer (by clearing
the TME bit to 0) before switching the mode.
13.6.5
Internal Reset in Watchdog Timer Mode
This LSI is not reset internally if TCNT overflows while the RSTE bit is cleared to 0 during
watchdog timer operation, however TCNT_0 and TCSR_0 of the WDT_0 are reset.
TCNT, TCSR, or RSTCR cannot be written to for 132 states following an overflow. During this
period, any attempt to read the WOVF flag is not acknowledged. Accordingly, wait 132 states
after overflow to write 0 to the WOVF flag for clearing.
13.6.6
OVF Flag Clearing in Interval Timer Mode
When the OVF flag setting conflicts with the OVF flag reading in interval timer mode, writing 0
to the OVF bit may not clear the flag even though the OVF bit has been read while it is 1. If there
is a possibility that the OVF flag setting and reading will conflict, such as when the OVF flag is
polled with the interval timer interrupt disabled, read the OVF bit while it is 1 at least twice before
writing 0 to the OVF bit to clear the flag.
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Section 13 Watchdog Timer (WDT)
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Section 14 IEBus Controller (IEB) [H8S/2258 Group]
This LSI has an on-chip one-channel IEBus™ controller (IEB). The Inter Equipment Bus
(IEBus)*1 is a small-scaled digital data transfer system for inter equipment data transfer.
This LSI does not have an on-chip IEBus driver/receiver, so it is necessary to mount a dedicated
driver/receiver*2 externally.
Notes: 1. IEBus is a trademark of NEC Electronics Corporation.
2. Bus interface driver/receiver IC: HA12187FP is recommended.
14.1
Features
• IEBus protocol control (layer 2) supported
 Half duplex asynchronous communications
 Multi-master system
 Broadcast communications function
 Selectable mode (three types) with different transfer speeds
• Data transfer by the data transfer controller (DTC)
 Transfer buffer: 1 byte
 Reception buffer: 1 byte
 Up to 128 bytes of consecutive transfer/reception (maximum number of transfer bytes in
mode 2)
• Operating frequency
 12 MHz, 12.58 MHz (IEB uses 1/2 divided external clock)
Note: ±1.5% when mode 0 or 1 is used, ±0.5% when mode 2 is used
• Noise resistance is improved by mounting the IEBus driver/receiver (layer 1) externally
• Module stop mode can be set
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Figure 14.1 shows an IEB block diagram.
Tx
IEBus
driver/receiver
Bit timing set/
detect circuit
Conflict
detect
circuit
Transmission block
Rx
Signal
polarity
select
circuit
Parity
generation
circuit
Parity
check
circuit
Transmit shift register
IEAR1
IEAR2
IESA1
IESA2
IEMCR
IETBFL
Receive shift register
IEMA1
IEMA2
IERCTL
IERBFL
IERBR
IELA1
Data link layer control block
IELA2
IECMR
IECTR
Status/interrupt control block
IETXI
(TxRDY interrupt)
IETSI
(Tx status interrupt)
IETSR
IEIET
IETEF
IERXI
(RxRDY interrupt)
IERSI
(Rx status interrupt)
IERSR
IEIER
IEREF
Figure 14.1 Block Diagram of IEB
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Internal data bus
Reception block
IETBR
Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.1.1
IEBus Communications Protocol
The overview of the IEBus is described below.
• Communications method: Half duplex asynchronous communications
• Multi-master system
All units connected to the IEBus can transfer data to other units.
• Broadcast communications function (one-to-many communications)
 Group broadcast communications: Broadcast communications to group unit
 General broadcast communications: Broadcast communications to all units
• Mode is selectable (three modes with different transfer speeds).
Table 14.1 Mode Types
Mode
φ = 12 MHz
φ = 12.58 MHz
Maximum Number of
Transfer Bytes (byte/frame)
0
About 3.9 kbps
About 4.1 kbps
16
1
About 17 kbps
About 18 kbps
32
2
About 26 kbps
About 27 kbps
128
• Access control: CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
Priority of bus mastership is as follows.
 Broadcast communications (one-to-many communications) have priority rather than
normal communications (one-to-one communications).
 Smaller master address has priority.
• Communications scale
 Number of units: Up to 50
 Cable length: Up to 150 m (when using a twisted pair cable)
Note: The communications scale of the actual system depends on the externally mounted IEBus
driver/receiver characteristics and the characteristics of the cable to be used.
(1) Determination of Bus Mastership (Arbitration)
A unit connected to the IEBus performs an operation for getting the bus to control other units. This
operation is called arbitration. In arbitration, when the multiple units start transfer simultaneously,
the bus mastership is given to one unit among them.
Only one unit can get bus mastership through arbitration, so the following priority for bus
mastership is defined.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
(a) Priority according to communications type
Broadcast communications (one-to-many communications) has priority over normal
communications (one-to-one communications).
(b) Priority according to master address
A unit with the smallest master address has priority among units with the same
communications type.
Example: The master address is configured with 12 bits. A unit with H'000 has the highest
priority, and a unit with H'FFF has the lowest priority.
Note: When a unit loses arbitration, the unit can automatically enter retransfer mode (0 to 7
retransfer times can be selected by bits RN2 to RN0 in IEMCR).
(2) Communications Mode
The IEBus has three communications modes with different transfer speeds. Table 14.2 shows the
transfer speed in each communications mode and the maximum number of transfer bytes in one
communications frame.
Table 14.2 Transfer speed and Maximum Number of Transfer Bytes in Each
Communications Mode
Maximum Number
Communications of Transfer Bytes
(byte/frame)
Mode
Effective Transfer Speed* (kbps)
1
2
φ = 12 MHz*
φ = 12.58 MHz*
2
0
16
About 3.9
About 4.1
1
32
About 17
About 18
2
128
About 26
About 27
Notes:
Each unit connected to the IEBus should select a communications mode prior to
performing communications. Note that correct communications is not guaranteed if the
master and slave units do not adopt the same communications mode.
In the case of communications between a unit with φ = 12 MHz and a unit with φ =
12.58 MHz, correct communications is not possible even if the same communications
mode is adopted. Communications must be performed at the same oscillation
frequency.
1. An effective transfer speed when the maximum number of transfer bytes is transmitted.
2. Oscillation frequency when this LSI is used
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
(3) Communications Address
In the IEBus, a 12-bit specific communications addresses are allocated to individual units. A
communications address is configured as follows.
• Upper four bits: group number (number identifying a group to which the unit belongs)
• Lower eight bits: unit number (number identifying individual units in a group)
(4) Broadcast Communications
In normal transfer, a single master unit communicates with a single slave unit. So, one-to-one
transfer or reception is performed. In broadcast communications, a single master unit
communicates with multiple slave units. Since there are multiple slave units, acknowledgement is
not returned from the slave units during communications.
A broadcast bit decides whether broadcast or normal communications is performed. (For details of
the broadcast bit, see section 14.1.2 (1) (b), Broadcast Bit.
There are two types of broadcast communications.
(a) Group broadcast communications
Broadcast communications is performed to units with the same group number, meaning that
those units have the same upper four bits of the communications address.
(b) General broadcast communications
Broadcast communications is performed to all units regardless of the group number.
Group broadcast and general broadcast communications are identified by a slave address. (For
details on the slave address, see section 14.1.2 (3), Slave Address Field.)
14.1.2
Communications Protocol
Figure 14.2 shows an IEBus transfer signal format.
Communications data is transferred as a series of signals referred to as a communications frame.
The number of data which can be transmitted in a single communications frame and the transfer
speed differ according to communications mode.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
(When φ = 12 MHz)
Field name
Number
of bits
Header
1
1
Master
Slave address
address field
field
12
1
12
1 1
Start Broad- Master
bit cast address
bit
P
Slave
address
P A
Control field
4
Control
bits
1
1
P A
Message
length field
8
1 1
Message
length
bits
P A
Data field
8
1
Data
bits
1
P A
8
Data
bits
1
1
P A
Transfer
time
Mode 0
Approximately 7330 µs
Approximately 1590 × N µs
Mode 1
Approximately 2090 µs
Approximately 410 × N µs
Mode 2
Approximately 1590 µs
Approximately 300 × N µs
P: Parity bit (1 bit)
A: Acknowledge bit (1 bit)
When A = 0: ACK
When A = 1: NAK
N: Number of bytes
Note: The value of acknowledge bit is ignored in broadcast communications.
Figure 14.2 Transfer Signal Format
(1) Header
Header is comprised of a start bit and a broadcast bit.
(a) Start Bit
The start bit is a signal for informing a start of data transfer to other units. A unit, which
attempts to start data transfer, outputs a low-level signal (start bit) for a specified period and
then outputs the broadcast bit.
If another unit is already outputting a start bit when a unit attempts to output a start bit, the unit
waits for completion of output of the start bit from the other unit without outputting the start
bit, and then outputs the broadcast bit synchronized with the completion timing.
Other units enter the receive state after detecting the start bit.
(b) Broadcast Bit
The broadcast bit is a bit to identify the type of communications: broadcast or normal.
When this bit is cleared to 0, it indicates the broadcast communications. When it is set to 1, it
indicates the normal communications. Broadcast communications includes group broadcast
and general broadcast, which are identified by a value of the slave address. (For details of the
slave address, see section 14.1.2 (3), Slave Address Field.)
Since there are multiple slave units, which are communications destination units, in the case of
broadcast communications, the acknowledge bit is not returned from each field described in (2)
and below.
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When more than one unit starts transfer of communications frame at the same timing,
broadcast communications has priority over normal communications, and arbitration occurs.
(2) Master Address Field
The master address field is a field for transmitting the unit address (master address) to other units.
The master address field is comprised of master address bits and a parity bit.
The master address has 12 bits and are output MSB first.
When more than one unit starts transfer of the broadcast bit having the same value at the same
timing, arbitration is decided by the master address field.
In the master address field, self-output data and data on the bus are compared for every one-bit
transfer. If the self-output master address and data on the bus are different, the unit that loses
arbitration, stops transfer, and enters the receive state.
Since the IEBus is configured with wired AND, a unit having the smallest master address of the
units in arbitration (arbitration master) wins in arbitration.
Finally, only a single unit remains in the transfer state as a master unit after outputting 12-bit
master address.
Next, this master unit outputs a parity bit*, defines the master address to other units, and then
enters the slave address field output state.
Note: * Since even parity is used, when the number of one bits in the master address is odd, the
parity bit is 1.
(3) Slave Address Field
The slave address field is a field to transmit an address (slave address) of a unit (slave unit) to
which a master transmit data. The slave address field is comprised of slave address bits, a parity
bit, and an acknowledge bit.
The slave address has 12 bits and is output MSB first. The parity bit is output after the 12-bit slave
address is transmitted in order to avoid receiving the slave address accidentally. The master unit
then detects the acknowledgement from the slave unit in order to confirm that the slave unit exists
on the bus. When the acknowledgement is detected, the master unit enters the control field output
state. However, the master unit enters the control field output state without detecting the
acknowledgement in broadcast communications.
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The slave unit returns the acknowledgement when the slave addresses match and the parities of the
master and slave addresses are correct. When either of the parities of the master and slave
addresses is wrong, the slave unit decides that the master or slave address is not correctly received
and does not return the acknowledgement. In this case, the master unit enters the waiting (monitor)
state, and communications end.
In the case of broadcast communications, the slave address is used to identify the type of broadcast
communications (group or general) as follows:
• When the slave address is H'FFF: General broadcast communications
• When the slave address is other than H'FFF: Group broadcast communications
Note: The group number is the upper 4-bit value of the slave address in group broadcast
communications.
(4) Control Field
The control field is a field for transmitting the type and direction of the following data field. The
control field is comprised of control bits, a parity bit, and an acknowledge bit.
The control bits include four bits and are output MSB first.
The parity bit is output following the control bits. When the parity is correct, and the slave unit can
implement the function required from the master unit, the slave unit returns the acknowledgement
and enters the message length field output state. However, if the slave unit cannot implement the
requirements from the master unit even though the parity is correct, or if the parity is not correct,
the slave unit does not return the acknowledgement, and returns to the waiting (monitor) state.
The master unit enters the subsequent message length field output state after confirming the
acknowledgement.
When the acknowledgement is not confirmed, the master unit enters the waiting (monitor) state,
and communications end. However, in the case of broadcast communications, the master unit
enters the following message length field output state without confirming the acknowledgement.
For details of the contents of the control bit, see table 14.4.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
(5) Message Length Field
The message length field is a field for specifying the number of transfer bytes. The message length
field is comprised of message length bits, a parity bit, and an acknowledge bit.
The message length has eight bits and is output MSB first. Table 14.3 shows the number of
transfer bytes.
Table 14.3 Contents of Message Length Bits
Message Length bits (Hexadecimal)
Number of Transfer Bytes
H'01
1 byte
H'02
.
.
2 bytes
.
.
H'FF
255 bytes
H'00
256 bytes
Note:
*
If a number greater than the maximum number of transfer bytes in one frame is
specified, communications are performed in multiple frames depending on the
communications mode. In this case, the message length bits indicate the number of
remaining communications data after the first transfer. In this LSI, after the first transfer,
the message length bits must be specified to the number of remaining communications
data by a program, since these bits are not automatically specified by the hardware.
This field operation differs depending on the value of bit 3 in the control field: master transmission
(bit 3 in the control bits is 1) or master reception (bit 3 in the control bits is 0).
(a) Master Transmission
The master unit outputs the message length bits and parity bit. When the parity is correct, the
slave unit returns the acknowledgement and enters the following data field. Note that the slave
unit does not return the acknowledgement in broadcast communications.
In addition, when the parity is not correct, the slave unit decides that the message length field
is not correctly received, does not return the acknowledgement, and returns to the waiting
(monitor) state. In this case, the master unit also returns to the waiting state, and
communications end.
(b) Master Reception
The slave unit outputs the message length bits and parity bit. When the parity is correct, the
master unit returns the acknowledgement.
When the parity is not correct, the master unit decides that the message length bits are not
correctly received, does not return the acknowledgement, and returns to the waiting state. In
this case, the slave unit also returns to the waiting state, and communications end.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
(6) Data Field
The data field is a field for data transmission/reception to the slave unit. The master unit
transmits/receives data to/from the slave unit using the data field. The data field is comprised of
data bits, a parity bit, and an acknowledge bit.
The data bits include eight bits and are output MSB first.
The parity bit and acknowledge bit following the data bits are output from the master unit and
slave unit, respectively.
Broadcast communications are performed only for the transmission of the master unit. In this case,
the acknowledge bit is ignored. Operations in master transmission and master reception are
described below.
(a) Master Transmission
The master unit transmits the data bits and parity bit to the slave unit to write data from the
master unit to the slave unit. The slave unit receives the data bits and parity bit, and returns the
acknowledgement if the parity bit is correct and the receive buffer is empty. If the parity bit is
not correct or the receive buffer is not empty, the slave unit rejects acceptance of
corresponding data and does not return the acknowledgement.
When the slave unit does not return the acknowledgement, the master unit retransmits the same
data. This operation is repeated until either the acknowledgement from the slave unit is
detected or the maximum number of data transfer bytes is exceeded.
When the parity is correct and the acknowledgement is output from the slave unit, the master
unit transmits the subsequent data if data remains and the maximum number of transfer bytes
is not exceeded.
In the case of broadcast communications, the slave unit does not return the acknowledgement,
and the master unit transfers data byte by byte.
(b) Master Reception
The master unit outputs synchronous signals corresponding to all data bits to be read from the
slave unit.
The slave unit outputs the data bits and parity bit on the bus in accordance with the
synchronous signals from the master unit.
The master unit reads the parity bit output from the slave unit, and checks the parity. If the
parity is not correct, or the receive buffer is not empty, the master unit rejects acceptance of the
data, and does not return the acknowledgement. The master unit reads the same data repeatedly
if the number of data does not exceed the maximum number of transfer bytes in one frame. If
the parity is correct and the receive buffer is empty, the master unit accepts data and returns the
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
acknowledgement. The master unit reads in the subsequent data if the number of data does not
exceed the maximum number of transfer bytes in one frame.
(7) Parity Bit
The parity bit is used to confirm that transfer data has no error.
The parity bit is added to respective data of the master address, slave address, control, message
length, and data bits.
The even parity is used. When the number of one bits in data is odd, the parity bit is 1. When the
number of one bits in data is even, the parity bit is 0.
(8) Acknowledge Bit
In normal communications (a single unit to a single unit communications), the acknowledge bit is
added to the following position in order to confirm that data is correctly accepted.
• At the end of the slave address field
• At the end of the control field
• At the end of the message length field
• At the end of the data field
The acknowledge bit is defined below.
• 0: indicates that the transfer data is acknowledged. (ACK)
• 1: indicates that the transfer data is not acknowledged. (NAK)
Note that the acknowledge bit is ignored in the case of broadcast communications.
(a) Acknowledge bit at the End of the Slave Address Field
The acknowledge bit at the end of the slave address field becomes NAK in the following cases
and transfer is stopped.
 When the parity of the master address or slave address bits is incorrect
 When a timing error (an error in bit format) occurs
 When there is no slave unit
(b) Acknowledge bit at the End of the Control Field
The acknowledge bit at the end of the control field becomes NAK in the following cases and
transfer is stopped.
 When the parity of the control bits is incorrect
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 When bit 3 in the control bits is 1 (data write) although the slave receive buffer* is not
empty
 When the control bits are set to the data read (H'3, H'7) although the slave transmit buffer*
is empty
 When another unit which locked the slave unit requests H'3, H'6, H'7, H'A, H'B, H'E, or
H'F in the control bits although the slave unit has been locked
 When the control bits are the locked address read (H'4, H'5) although the unit is not locked
 When a timing error occurs
 When the control bits are undefined
Note: * See section 14.1.3 (1), Slave Status Read (Control Bits: H'0, H'6).
(c) Acknowledge Bit at the End of the Message Length Field
The acknowledge bit at the end of the message length field becomes NAK in the following
cases and transfer is stopped.
 When the parity of the message length bits is incorrect
 When a timing error occurs
(d) Acknowledge Bit at the End of the Data Field
The acknowledge bit at the end of the data field becomes NAK in the following cases and
transfer is stopped.
 When the parity of the data bits is incorrect*
 When a timing error occurs after the previous transfer of the acknowledge bit
 When the receive buffer becomes full and cannot accept further data
Note: * In this case, data field is transferred repeatedly until the number of data reaches the
maximum number of transfer bytes if the number of data does not exceed the
maximum number of transfer bytes in one frame.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.1.3
Transfer Data (Data Field Contents)
The data filed contents are specified by the control bits.
Table 14.4 Control Bit Contents
Setting
1
Value
Bit 3*
Bit 2
Bit 1
Bit 0
Function*
2
H'0
0
0
0
0
Reads slave status (SSR)
H'1
0
0
0
1
Undefined  do not use
H'2
0
0
1
0
Undefined  do not use
H'3
0
0
1
1
Reads data and locks
H'4
0
1
0
0
Reads locked address (lower 8 bits)
H'5
0
1
0
1
Reads locked address (upper 4 bits)
H'6
0
1
1
0
Reads slave status (SSR) and unlocks
H'7
0
1
1
1
Reads data
H'8
1
0
0
0
Undefined  do not use
H'9
1
0
0
1
Undefined  do not use
H'A
1
0
1
0
Writes command and locks
H'B
1
0
1
1
Writes data and locks
H'C
1
1
0
0
Undefined  do not use
H'D
1
1
0
1
Undefined  do not use
H'E
1
1
1
0
Writes command
H'F
1
1
1
1
Writes data
Notes: 1. According to the value of bit 3 (MSB), the transfer directions of the message length bits
in the following message length field and data in the data field vary.
When bit 3 is 1: Data is transferred from the master unit to the slave unit.
When bit 3 is 0: Data is transferred from the slave unit to the master unit.
2. H'3, H'6, H'A, and H'B are control bits to specify lock setting and cancellation.
When the undefined values of H'1, H'2, H'8, H'9, H'C, and H'D are transmitted, the
acknowledge bit is not returned.
When the control bits received from another unit which locked are not included in table 14.5, the
slave unit which has been locked by the master unit rejects acceptance of the control bits and does
not return the acknowledge bit.
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Table 14.5 Control Field for Locked Slave Unit
Setting
Value
Bit 3
Bit 2
Bit 1
Bit 0
Function
H'0
0
0
0
0
Reads slave status
H'4
0
1
0
0
Reads locked address (upper 8 bits)
H'5
0
1
0
1
Reads locked address (lower 4 bits)
(1) Slave Status Read (Control Bits: H'0, H'6)
The master unit can decide the reason the slave unit does not return the acknowledgement (ACK)
by reading the slave status (H'0, H'6). The slave status indicates the result of the last
communications that the slave unit performs. All slave units can provide slave status information.
Figure 14.3 shows bit configuration of the slave status.
LSB
MSB
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit
Value Description
Bit 7,
00
Mode 0
bit 6
01
Mode 1
10
Mode 2
11
For future use
Bit 5
0
Fixed 0
Bit 4*2
0
Slave transmission halted
1
Slave transmission enabled
Bit 3
0
Fixed 0
Bit 2
0
Unit is unlocked
1
Unit is locked
0
Slave receive buffer is empty
1
Slave receive buffer is not empty
0
Slave transmit buffer is empty
1
Slave transmit buffer is not empty
Bit 1*3
Bit 0*4
Bit 1
Bit 0
Indicates the highest mode
supported by a unit.*1
Notes: 1. Since this LSI can support up to mode 2, bits 6 and 7 are fixed to 10.
2. The value of bit 4 can be selected by the STE bit in the IEBus master unit address register 1 (IEAR1).
3. The slave receive buffer is a buffer which is accessed during data write
(control bits: H'8, H'A, H'B, H'E, H'F).
In this LSI, the slave receive buffer corresponds to the IEBus receive buffer register (IERBR);
and bit 2 is the value of the RxRDY flag in the IEBus receive status register (IERSR).
4. The slave transmit buffer is a buffer which is accessed during data read
(control bits: H'3, H'7).
In this LSI, the slave transmit buffer corresponds to the IEBus transmit buffer register (IETBR)
when SRQ = 1 in the IEBus general flag register (IEFLG); and bit 1 is a value which reverses the
TxRDY flag in the IEBus transmit/runaway status register (IETSR).
Figure 14.3 Bit Configuration of Slave Status (SSR)
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(2) Data Command Transfer (Control Bits: Read (H'3, H'7), Write (H'A, H'B, H'E, H'F))
In the case of data read (H'3, H'7), data in the data buffer of the slave unit is read in the master
unit. In the case of data write (H'B or H'F) or command write (H'A or H'E), data received in the
slave unit is processed in accordance with the operation specification of the slave unit.
Notes: 1. The user can select data and commands freely in accordance with the system.
2.
H'3, H'A, or H'B may lock depending on the communications condition and status.
(3) Locked Address Read (Control Bits: H'4, H'5)
In the case of the locked address read (H'4 or H'5), the address (12 bits) of the master unit which
issues lock instruction is configured in bytes shown in figure 14.4.
MSB
Control bits: H'4
Control bits: H'5
LSB
Lower 8 bits
Undefined
Upper 4 bits
Figure 14.4 Locked Address Configuration
(4) Locking/Unlocking (Control Bits: Setting (H'3, H'A, H'B), Cancellation: (H'6))
The lock function is used for message transfer over multiple communications frames. Locked unit
receives data only from the unit which has locked.
Locking and unlocking are described below.
• Locking
When the acknowledge bit of 0 in the message length field is transmitted/received with the
control bits indicating the lock operation, and then the communications frame is completed
before completion of data transmission/reception for the number of bytes specified by the
message length bits, the slave unit is locked by the master unit. In this case, the bit (bit 2)
relevant to lock in the byte data indicating the slave status is set to 1.
Lock is set only when the number of data exceeds the maximum number of transfer bytes in
one frame. Lock is not set by other error termination.
• Unlocking
When the control bits indicate the lock (H'3, H'A, or H'B) or unlock (H'6) operation and the
byte data for the number of bytes specified by the message length bits are transmitted/received
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in a single communications frame, the slave unit is unlocked by the master unit. In this case, a
bit (bit 2) relevant to lock in the byte indicating the slave status is cleared to 0.
Note that locking and unlocking are not performed in broadcast communications.
Note: * There are three methods to unlock by a locked unit itself.
• Perform hardware reset
• Enter module stop mode
• Issue unlock command by the IEBus command register (IECMR)
Note that the LCK flag in IEFLG can be used to check whether the unit is
locked/unlocked.
14.1.4
Bit Format
Figure 14.5 shows the bit format (conceptual diagram) configuring the IEBus communications
frame.
Logic 1
Logic 0
Preparation Synchronous
period
period
Data
period
Halt
period
Active low: Logic 1 = low level and logic 0 = high level
Active high: Logic 1 = high level and logic 0 = low level
Figure 14.5 IEBus Bit Format (Conceptual Diagram)
Each period of bit format for use of active high signals is described below.
• Preparation period: first logic 1 period (high level)
• Synchronous period: subsequent logic 0 period (low level)
• Data period: period indicating bit value (logic 1: high level, logic 0: low level)
• Halt period: last logic 1 cycle (high level)
For use of active low signals, levels are reversed from the active high signals.
The synchronous and data periods have approximately the same length.
The IEBus is synchronized bit by bit. The specifications for the time of all bits and the periods
allocated to the bits differ depending on the type of transfer bits and the unit (master or slave unit).
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.2
Input/Output Pins
Table 14.6 shows the IEB pin configuration.
Table 14.6 Pin Configuration
Name
Abbreviation I/O
Function
IEBus transmit data pin
Tx
Output
Transmit data output pin
IEBus receive data pin
Rx
Input
Receive data input pin
14.3
Register Descriptions
The IEB has the following registers. For the module stop control register, see section 24.1.2,
Module Stop Control Registers A to C (MSTPCRA to MSTPCRC).
• IEBus control register (IECTR)
• IEBUS command register (IECMR)
• IEBus master control register (IEMCR)
• IEBus master unit address register 1 (IEAR1)
• IEBus master unit address register 2 (IEAR2)
• IEBus slave address setting register 1 (IESA1)
• IEBus slave address setting register 2 (IESA2)
• IEBus transmit message length register (IETBFL)
• IEBus transmit buffer register (IETBR)
• IEBus reception master address register 1 (IEMA1)
• IEBus reception master address register 2 (IEMA2)
• IEBus receive control field register (IERCTL)
• IEBus receive message length register (IERBFL)
• IEBus receive buffer register (IERBR)
• IEBus lock address register 1 (IELA1)
• IEBus lock address register 2 (IELA2)
• IEBus general flag register (IEFLG)
• IEBus transmit/runaway status register (IETSR)
• IEBus transmit/runaway interrupt enable register (IEIET)
• IEBus transmit error flag register (IETEF)
• IEBus receive status register (IERSR)
• IEBus receive interrupt enable register (IEIER)
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
• IEBus receive error flag register (IEREF)
14.3.1
IEBus Control Register (IECTR)
IECTR controls IEB operation (switches IEBus pin/port functions, selects input/output level, and
enables receive operation).
Bit
Bit Name
Initial
Value
R/W
Description
7
IEE
0
R/W
IEB Pin Switch
Switches IEB pin and port functions.
0: The PG3/Rx/CS1 and PG2/Tx/CS2 pins function as the
PG3/CS1 and PG2/CS2 pins.
1: The PG3/Rx/CS1 and PG2/Tx/CS2 pins function as the
Tx and Rx pins.
6
IOL
0
R/W
Input/Output Level
Selects input/output pin level (polarity) for the Rx and Tx
pins.
0: Pin input/output is set to active low. (Logic 1 is low level
and logic 0 is high level.)
1: Pin input/output is set to active high. (Logic 1 is high
level and logic 0 is low level.)
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
5
DEE
0
R/W
Description
Broadcast Receive Error Interrupt Enable
Since the acknowledgement is not returned between the
master and slave units in broadcast reception, the master
unit cannot decide whether the slave unit is in the receive
enabled state. If this bit is set to 1, a reception error
interrupt occurs (note that there is not the corresponding bit
in the IEBus receive error flag register to this error) when
the receive buffer is not in the receive enabled state during
receiving the control field in broadcast reception (when the
RE bit is not set to 1 or the RxRDY flag is set.). At this time,
the master address is stored in IEMA1 and IEMA2. The
receive data is not stored in the IERCTL.
While this bit is 0, a reception error interrupt does not occur
when the receive buffer is not in the receive enabled state,
and the reception stops and enters the wait state. The
master address is not saved.
0: A broadcast receive error is not generated up to the
control field.
1: A broadcast receive error is generated up to the control
field.
4
CKS
0
R/W
Input Clock Select
Always set this bit to 0 in this LSI. Selects clock used by
the IEB.
3
RE
0
R/W
Receive Enable
Enables/disables IEB reception. This bit must be set at the
initial setting before frame reception. Changing this bit
before receiving the control field is valid, however,
changing this bit after receiving the control field is invalid
and the value before the change is validated.
0: Reception is disabled.
1: Reception is enabled.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
2
LUEE
0
R/W
Last Byte Underrun Enable
Sets whether to generate an underrun error when the last
data field byte is transferred in data transmission.
If the IEB reads from IETBR when the TxRDY flag is set
(the transmit buffer register (IETBR) is empty), an underrun
error occurs. In transmission using the DTC, an underrun
error occurs at the last byte transmission if the CPU did not
clear the TxRDY flag, because the DTC does not clear the
TxRDY flag. When the DTC is used, set this bit to 0 to
mask an underrun error generated at the last byte
transmission. When the DTC is not used, set this bit to 1 to
generate an underrun error at the last byte transmission.
0: An underrun error does not occur at the last byte
transmission (when using the DTC)
1: An underrun error does not occur at the last byte
transmission (when not using the DTC)
1, 0

All 0

Reserved
This bit is always read as 0 and cannot be modified.
14.3.2
IEBus Command Register (IECMR)
IECMR issues commands to control IEB communications. Since this register is a write-only
register, bit-manipulation instructions should not be used when writing. See section 2.9.4, Access
Methods for Registers with Write-Only Bits.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
7 to 3 
Initial
Value
R/W
Description
All 0

Reserved
The read value is undefined. In order to avoid malfunction,
do not use bit manipulation instructions. These bits cannot
be modified.
2
CMD2
0
W
Command Bits
1
CMD1
0
W
0
CMD0
0
W
These bits issue a command to control IEB
communications. When the CMX flag in IEFLG is set after
the command issuance, the command is indicated to be in
execution. When the CMX flag becomes 0, the operation
state is entered. These bits are read as 0. The read value
is undefined. Do not use a bit manipulation instruction that
causes malfunction.
000: No operation. Operation is not affected.
1
001: Unlock (required from other units)*
010: Requires communications as the master
2
011: Stops master communications*
100: Undefined bits. Operation is not affected by this
command.
101: Requires data transfer from the slave.
3
110: Stops data transfer from the slave* .
111: Undefined bits. Operation is not affected by this
command.
Notes: 1. Do not execute this command in slave communications. Execute this command after
slave communications ends or in master communications. If this command is issued in
slave communications, this command is ignored.
2. This command is valid during master communications (MRQ = 1). In other states, this
command issuance is ignored. If this command is issued in master communications, the
communications controller immediately enters the wait state. At this time, the issued
master transmission request ends (MRQ = 0).
3. This command is valid during slave communications (SRQ = 1). In other states, this
command issuance is ignored. Once this command was issued in slave transmission,
the SRQ flag is 0 before slave transmission. Therefore, a transmit request from the
master is not responded. If a transmit request is issued during slave transmission, the
transmission stops and the wait state is entered (SRQ = 0).
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.3
IEBus Master Control Register (IEMCR)
IEMCR sets communications conditions for master communications (selection of broadcast or
normal communications, retransmission counts at arbitration loss, and control bits value). It is not
necessary to set this register for slave communications.
Bit
Bit Name
Initial
Value
R/W
Description
7
SS
1
R/W
Broadcast/Normal Communications Select
Selects broadcast or normal communications for master
communications.
0: Broadcast communications
1: Normal communications
6
RN2
0
R/W
Retransmission Counts
5
RN1
0
R/W
4
RN0
0
R/W
Set the number of times retransmission is performed when
arbitration is lost in master communications. If arbitration is
lost for a specified number of times, the TxE flag in IETSR
and the AL flag in IETEF are set and transmission ends
with a transmit error. If arbitration is won during
retransmission, the retransmission count is automatically
restored to the initial setting after master address transfer.
000: 0
001: 1
010: 2
011: 3
100: 4
101: 5
110: 6
111: 7
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
3
1
CTL3*
0
R/W
Control bits
2
CTL2
0
R/W
1
CTL1
0
R/W
Set the control bits in the control field for master
transmission.
0
CTL0
0
R/W
0000: Reads slave status
0001: Undefined. Setting prohibited.
0010: Undefined. Setting prohibited.
2
0011: Reads data and locks*
0100: Reads locked address (lower 8 bits)
0101: Reads locked address (upper 4 bits)
2
0110: Reads slave status and unlocks*
0111: Reads data
1000: Undefined. Setting prohibited.
1001: Undefined. Setting prohibited.
2
1010: Writes command and locks*
1011: Writes data and locks*
2
1100: Undefined. Setting prohibited.
1101: Undefined. Setting prohibited.
1110: Writes command
1111: Writes data
Notes: 1. CTL3 decides the data transfer direction of the message length bits in the message
length field and data bits in the data field:
CTL3 = 1: Transfer is performed from master unit to slave unit
CTL3 = 0: Transfer is performed from slave unit to master unit
2. Control bits to lock and unlock
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.4
IEBus Master Unit Address Register 1 (IEAR1)
IEAR1 sets the lower 4 bits of the master unit address and communications mode. In master
communications, the master unit address becomes the master address field value. In slave
communications, the master unit address is compared with the received slave address field.
Bit
Bit Name
Initial
Value
R/W
Description
7
IAR3
0
R/W
Lower 4 Bits of IEBus Master Unit Address
6
IAR2
0
R/W
Set the lower 4 bits of the master unit address.
5
IAR1
0
R/W
4
IAR0
0
R/W
3
IMD1
0
R/W
IEBus Communications Mode
2
IMD0
0
R/W
Set IEBus communications mode.
00: Communications mode 0
01: Communications mode 1
10: Communications mode 2
11: Setting prohibited
1

0

Reserved
This bit is always read as 0 and cannot be modified.
0
STE
0
R/W
Slave Transmission Setting
Sets bit 4 in the slave status register. Transmitting the
slave status register informs the master unit that the slave
transmission enabled state is entered by setting this bit to
1. Note that this bit only sets the slave status register value
and does not affect slave transmission directly.
0: Bit 4 in the slave status register is 0 (slave transmission
stop state)
1: Bit 4 in the slave status register is 1 (slave transmission
enabled state)
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.5
IEBus Master Unit Address Register 2 (IEAR2)
IEAR2 sets the upper 8 bits of the master unit address. In master communications, this register
becomes the master address field value. In slave communications, this register is compared with
the received slave address field.
Bit
Bit Name
Initial Value
R/W
Description
7
IAR11
0
R/W
Upper 8 Bits of IEBus Master Unit Address
6
IAR10
0
R/W
Set the upper 8 bits of the master unit address.
5
IAR9
0
R/W
4
IAR8
0
R/W
3
IAR7
0
R/W
2
IAR6
0
R/W
1
IAR5
0
R/W
0
IAR4
0
R/W
14.3.6
IEBus Slave Address Setting Register 1 (IESA1)
IESA1 sets the lower 4 bits of the communications destination slave unit address. For slave
communications, it is not necessary to set this register.
Bit
Bit Name
Initial Value
R/W
Description
7
ISA3
0
R/W
Lower 4 Bits of IEBus Slave Address
6
ISA2
0
R/W
5
ISA1
0
R/W
These bits set the lower 4 bits of the
communications destination slave unit address
4
ISA0
0
R/W
All 0

3 to 0 
Reserved
These bits are always read as 0 and cannot be
modified.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.7
IEBus Slave Address Setting Register 2 (IESA2)
IESA2 sets the upper 8 bits of the communications destination slave unit address. For slave
communications, it is not necessary to set this register.
Bit
Bit Name
Initial Value
R/W
Description
7
ISA11
0
R/W
Upper 8 Bits of IEBus Slave Address
6
ISA10
0
R/W
5
ISA9
0
R/W
Set upper 8 bits of the communications destination
slave unit address
4
ISA8
0
R/W
3
ISA7
0
R/W
2
ISA6
0
R/W
1
ISA5
0
R/W
0
ISA4
0
R/W
14.3.8
IEBus Transmit Message Length Register (IETBFL)
IETBFL sets the message length for master or slave transmission.
Bit
Bit Name
Initial Value
R/W
Description
7
TBFL7
0
R/W
Transmit Message Length
6
TBFL6
0
R/W
5
TBFL5
0
R/W
Set the message length for master or slave
transmission.
4
TBFL4
0
R/W
3
TBFL3
0
R/W
2
TBFL2
0
R/W
1
TBFL1
0
R/W
0
TBFL0
0
R/W
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If a value exceeding the maximum transmit bytes
for one frame is set in IETBFL, communications
are performed with two or more frames in some
communications modes. In this case, in or after the
second frame, the message length value should be
the number of bytes of the remaining
communications data, however, the initial IETBFL
setting remains unchanged. Therefore, for the
second frame or after, re-set the number of bytes
of the remaining communications data.
Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.9
IEBus Transmit Buffer Register (IETBR)
IETBR is a 1-byte buffer to which data to be transmitted in master or slave transmission is written.
IETBR is empty when the TxRDY flag in IETSR is 1. Check the TxRDY flag before setting
transmit data in IETBR.
Data written in IETBR is transmitted in the data field in master or slave transmission. Figure 14.6
shows the correspondence between the communications signal format and registers for IEBus data
transfer.
Bit
Bit Name
Initial Value
R/W
Description
7
TBR7
0
R/W
6
TBR6
0
R/W
Data to be transmitted is written to this 1-byte
buffer.
5
TBR5
0
R/W
4
TBR4
0
R/W
3
TBR3
0
R/W
2
TBR2
0
R/W
1
TBR1
0
R/W
0
TBR0
0
R/W
[In master transmission]
Communications frame Master address Slave address
Control bits
Message length
bits
Data bits
Register
IESA1, IESA2
CTL3 to CTL0
in IEMCR
IETBFL
IETBR
Communications frame Master address Slave address
Control bits
Message length
bits
Data bits
(*3)
IETBFL
IETBR
IEAR1, IEAR2
[In slave transmission]
(*2)
Register
(*1)
IEAR1, IEAR2
Notes: 1. In slave transmission, the received master address is not saved. If the unit is locked,
address comparison performed.
2. The received slave address is compared with IEAR1 and IEAR2, and if these addresses
match, operation continues.
3. In slave transmission, the received control bits are not saved. The received control bits
are decoded to decide the subsequent operation.
Figure 14.6 Transmission Signal Format and Registers in Data Transfer
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.10 IEBus Reception Master Address Register 1 (IEMA1)
IEMA1 indicates the lower four bits of the communications destination master unit address in
slave/broadcast reception. This register is enabled when slave/broadcast reception starts, and the
contents are changed at the timing of setting the RxS flag in IERSR.
If a broadcast receive error interrupt is selected by the DEE bit in IECTR and the receive buffer is
not in the receive enabled state on control field reception, a receive error interrupt is generated and
the lower 4 bits of the master address are stored in IEMA1. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
IMA3
0
R
Lower 4 Bits of IEBus Reception Master Address
6
IMA2
0
R
5
IMA1
0
R
4
IMA0
0
R
Indicate the lower 4 bits of the communications
destination master unit address in slave/broadcast
reception.
All 0
R
3 to 0 
Reserved
These bits are always read as 0.
14.3.11 IEBus Reception Master Address Register 2 (IEMA2)
IEMA2 indicates the upper 8 bits of the communications destination master unit address in
slave/broadcast reception. This register is enabled when slave/broadcast reception starts, and the
contents are changed at the timing of setting the RxS flag in IERSR.
If a broadcast receive error interrupt is selected with the DEE bit in IECTR and the receive buffer
is not in the receive enabled state at control field reception, a receive error interrupt is generated
and the upper 8 bits of the master address are stored in IEMA2. This register cannot be modified
by a write.
Bit
Bit Name
Initial Value
R/W
Description
7
IMA11
0
R
Upper 8 Bits of IEBus Reception Master Address
6
IMA10
0
R
5
IMA9
0
R
4
IMA8
0
R
Indicate the upper 8 bits of the communications
destination master unit address in slave/broadcast
reception.
3
IMA7
0
R
2
IMA6
0
R
1
IMA5
0
R
0
IMA4
0
R
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.12 IEBus Receive Control Field Register (IERCTL)
IERCTL indicates the control field value in slave/broadcast reception. This register is enabled
when slave/broadcast receive starts, and the contents are changed at the timing of setting the RxS
flag in IERSR.
This register cannot be modified.
Bit
Bit Name
7 to 4 
Initial Value
R/W
Description
All 0
R
Reserved
These bits are always read as 0.
3
RCTL3
0
R
IEBus Receive Control Field
2
RCTL2
0
R
1
RCTL1
0
R
Indicate the control field value in slave/broadcast
reception.
0
RCTL0
0
R
14.3.13 IEBus Receive Message Length Register (IERBFL)
IERBFL indicates the message length field in slave/broadcast reception. This register is enabled
when slave/broadcast receive starts, and the contents are changed at the timing of setting the RxS
flag in IERSR.
This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
RBFL7
0
R
IEBus Receive Message Length
6
RBFL6
0
R
5
RBFL5
0
R
Indicate the contents of message length field in
slave/broadcast reception.
4
RBFL4
0
R
3
RBFL3
0
R
2
RBFL2
0
R
1
RBFL1
0
R
0
RBFL0
0
R
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.14 IEBus Receive Buffer Register (IERBR)
IERBR is a 1-byte read-only buffer that stores data received in master or slave reception. This
register can be read when the RxRDY flag in IERSR is set to 1. This register indicates the data
field value both in master and slave receptions. This register cannot be modified.
Figure 14.7 shows the relationship between transmission signal format and registers in IEBus data
reception.
Bit
Bit Name
Initial Value
R/W
Description
7
RBR7
0
R
6
RBR6
0
R
One-byte read-only buffer that stores data received
in master or slave reception
5
RBR5
0
R
4
RBR4
0
R
3
RBR3
0
R
2
RBR2
0
R
1
RBR1
0
R
0
RBR0
0
R
[In slave reception]
Communications frame Master address Slave address
Control bits
Message length
bits
Data bits
(*)
Register
IEMA1, IEMA2 IEAR1, IEAR2
IERCTL
IERBFL
IERBR
Note: * Received slave address is compared with IEAR1 and IEAR2. If they match,
the following operations are performed.
[In master reception]
Communications frame Master address Slave address
Register settings
IEAR1, IEAR2
IESA1, IESA2
Control bits
CTL3 to CTL0
in IEMCR
Message length
bits
IERBFL
Data bits
IERBR
Figure 14.7 Relationship between Transmission Signal Format and Registers
in IEBus Data Reception
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.15 IEBus Lock Address Register 1 (IELA1)
IELA1 specifies the lower 8 bits of a locked address when a unit is locked. Data in this register is
valid when the LCK flag in IEFLG is set to 1. This register cannot be modified.
Bit
Bit Name
Initial Value
R/W
Description
7
ILA7
0
R
Lower 8 Bits of IEBus Lock Address
6
ILA6
0
R
5
ILA5
0
R
Store the lower 8 bits of the master unit address
when a unit is locked.
4
ILA4
0
R
3
ILA3
0
R
2
ILA2
0
R
1
ILA1
0
R
0
ILA0
0
R
14.3.16 IEBus Lock Address Register 2 (IELA2)
IELA2 is an 8-bit read-only register that specifies the upper 4 bits of a locked address when a unit
is locked. Data in this register is valid when the LCK flag in IEFLG is set to 1. This register
cannot be modified.
Bit
Bit Name
7 to 4 
Initial Value
R/W
Description
All 0
R
Reserved
These bits are always read as 0.
3
ILA11
0
R
Upper 4 Bits of IEBus Locked Address
2
ILA10
0
R
1
ILA9
0
R
Store the upper 4 bits of the master unit address
when a unit is locked.
0
ILA8
0
R
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.17 IEBus General Flag Register (IEFLG)
IEFLG indicates the IEB command execution status, lock status and slave address match, and
broadcast reception detection. This register cannot be modified.
Bit
Bit Name
Initial
Value
R/W
Description
7
CMX
0
R
Command Execution Status
Indicates the command execution status.
1: A command is being executed
[Setting condition]
When a master communications request or slave transmit
request command is issued while the MRQ, SRQ, or SRE
flag is set to 1
0: A command execution is completed
[Clearing condition]
When a command execution has been completed
6
MRQ
0
R
Master Communications Request
Indicates whether or not the unit is in communications
request state as a master unit.
1: The unit is in communications request state as a master
unit
[Setting condition]
When the CMX flag is cleared to 0 after the master
communications request command is issued
0: The unit is not in communications request status as a
master unit
[Clearing condition]
When the master communications have been completed
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
5
SRQ
0
R
Slave Transmission Request
Indicates whether or not the unit is in transmit request
status as a slave unit.
1: The unit is in transmit request status as a slave unit
[Setting condition]
When the CMX flag is cleared to 0 after the slave transmit
request command is issued.
0: The unit is not in transmit request status as a slave unit
[Clearing condition]
When a slave transmission has been completed.
4
SRE
0
R
Slave Receive Status
Indicates the execution status in slave/broadcast reception.
1: Slave/broadcast reception is being executed
[Setting condition]
When the slave/broadcast reception is started while the RE
bit in IECTR is set to 1.
0: Slave/broadcast reception is not being executed
[Clearing condition]
When the slave/broadcast reception has been completed.
3
LCK
0
R
Lock Status Indication
Set to 1 when a unit is locked by a lock request from the
master unit. IELA1 and IELA2 values are valid only when
this flag is set to 1.
1: A unit is locked
[Setting condition]
When data for the number of bytes specified by the
message length is not received after the control bits that
make the unit locked are received from the master unit.
(The LCK flag is set to 1 only when the message length
exceeds the maximum number of transfer bytes in one
frame. This flag is not set by completion of other errors.)
0: A unit is unlocked
[Clearing condition]
When an unlock condition is satisfied or when an unlock
command is issued.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
2

0
R
Reserved
This bit is always read as 0.
1
RSS
0
R
Receive Broadcast Bit Status
Indicates the received broadcast bit value. This flag is valid
when the slave/broadcast reception is started. (This flag is
changed at the timing of setting the RxS flag in IERSR.)
The previous value remains unchanged until the next
slave/broadcast reception is started.
0
GG
0
R
General Broadcast Reception Acknowledgement
Set to 1 when the slave address is acknowledged as H'FFF
in broadcast reception. As well as the receive broadcast bit,
this flag is valid when the slave/broadcast reception is
started. (This flag is changed at the timing of setting the
RxS flag in IERSR.)
The previous value remains unchanged until the next
slave/broadcast reception is started. This flag is cleared to
0 in slave normal reception.
[Setting condition]
When H'FFF is acknowledged in the slave field in
broadcast reception
[Clearing conditions]
•
A unit is in slave reception
•
When H'FFF is not acknowledged in slave field in
broadcast reception
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.18 IEBus Transmit/Runaway Status Register (IETSR)
IETSR detects transmit data ready, transmit start, transmit normal completion, transmit completion
with an error, or runaway states. Each status flags in IETSR corresponds to a bit in the IEBus
transmit/runaway interrupt enable register (IEIET) that enables or disables each interrupt.
Bit
Bit Name
Initial
Value
R/W
Description
7
TxRDY
1
R/W
Transmit Data Ready
Indicates that the next data can be written to IETBR since
IETBR is empty. This flag is automatically cleared by DTC*
data transfer. When data is transmitted by the CPU, this
flag must be cleared by software. This flag is cleared by
writing 0 after reading a 1 from this flag.
[Setting conditions]
•
Immediately after reset
•
When data can be written to IETBR (: When IEB has
loaded data from IETBR to the transmit shift register)
[Clearing conditions]
•
When writing 0 after reading TxRDY = 1
•
When data is written to TBR by the DTC by a TxRDY
request.
Note: This flag is not cleared on the end byte of DTC
transfer.
6 to 4 
All 0

Reserved
These bits are always read as 0 and cannot be modified.
3
IRA
0
R/W
IEBus Runaway State
Indicates that the on-chip microprogram for IEBus control is
in the runaway states. This flag is set to 1 when a runaway
occurs during either IEBus transmission or reception. (This
flag is not a transfer specific flag and is also set for a
reception runaway.)
[Setting condition]
When the on-chip microprogram is in the runaway states
[Clearing condition]
When writing 0 after reading IRA = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
2
TxS
0
R/W
Description
Transmit Start Detection
Indicates that the IEB starts transmission.
[Setting conditions]
•
Master transmission: When the arbitration is won and
when the master address field transmission is
completed
•
Slave transmission: When the control bits of H'3 (0011)
or H'7 (0111) is received from the master unit meaning
that data transfer is requested
[Clearing condition]
When writing 0 after reading TxS = 1
1
TxF
0
R/W
Transmit Normal Completion
Indicates that data for the number of bytes specified by the
message length bits has been transmitted with no error.
[Setting condition]
When data for the number of bytes specified by the
message length bits has been transmitted normally
[Clearing condition]
When writing 0 after reading TxF = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
0
TxE
0
R/W
Description
Transmit Error Completion
Indicates that data for the number of bytes specified by the
message length bits is not completed and that the data
transmission is terminated. The source of this error can be
checked by the contents of IETEF. This flag is set at the
timing that an error indicated by IETEF occurs. The TxE
flag can be cleared even when the error source flag in
IETEF is set to 1 because the TxE flag is not logically
ORed with the flags in IETEF.
In master reception, an error (arbitration loss, timing error,
or NAK reception) generated after a master
communications command is issued before master
reception starts will be detected as a transmit error.
[Setting condition]
When the data for the number of bytes specified by the
message length bits is not completed and when the
transmission is terminated
[Clearing condition]
When writing 0 after reading TxE = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.19
IEBus Transmit/Runaway Interrupt Enable Register (IEIET)
IEIET enables/disables IETSR transmit ready, transmit start, transmit normal completion, transmit
completion with an error, and runaway interrupts.
Bit
Bit Name
Initial
Value
R/W
Description
7
TxRDYE
0
R/W
Transmit Data Ready Interrupt Enable
Enables/disables a transmit data ready interrupt.
0: Disables a transmit data ready (TxRDY) interrupt
1: Enables a transmit data ready (TxRDY) interrupt
6 to 4 
All 0

Reserved
These bits are always read as 0 and cannot be modified.
3
IRAE
0
R/W
IEBus Runaway State Interrupt Enable
Enables/disables an IEBus runaway state interrupt.
0: Disables an IEBus runaway state interrupt (IRA)
1: Enables an IEBus runaway state interrupt (IRA)
2
TxSE
0
R/W
Transmit Start Interrupt Enable
Enables/disables a transmit start (TxS) interrupt.
0: Disables a transmit start (TxS) interrupt
1: Enables a transmit start (TxS) interrupt
1
TxFE
0
R/W
Transmit Normal Completion Interrupt Enable
Enables/disables a transmit normal completion (TxF)
interrupt.
0: Disables a transmit normal completion (TxF) interrupt
1: Enables a transmit normal completion (TxF) interrupt
0
TxEE
0
R/W
Transmit Error Termination Interrupt Enable
Enables/disables a transmit error termination (TxE)
interrupt.
0: Disables a transmit error termination (TxE) interrupt
1: Enables a transmit error termination (TxE) interrupt
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.20 IEBus Transmit Error Flag Register (IETEF)
IETEF checks the source of a TxE interrupt indicated in IETSR. This register detects an overflow
of a maximum number of bytes in one frame, arbitration loss, underrun error, timing error, and
NAK reception.
Initial
Value
R/W
Description
7 to 5 
All 0

Reserved
4
0
R/W
Arbitration Loss
Bit
Bit Name
These bits are always read as 0 and cannot be modified.
AL
The IEB retransmits from the start bit for the number of
times specified by bits RN2 to Rn0 in IEMCR if the
arbitration has been lost in master communications. If the
arbitration has been lost for the specified number of times,
the AL and TxE flags are set to enter the wait state. If the
arbitration has been won within retransmit for the specified
number of times, this flag is not set to 1. This flag is set
only when the arbitration has been lost and the wait state is
entered.
[Setting condition]
When the arbitration has been lost during data
transmission and the transmission has been terminated
[Clearing condition]
When writing 0 after reading AL = 1
3
UE
0
R/W
Underrun Error
Indicates that an underrun error has occurred during data
transmission. The IEB detects an underrun error
occurrence when the IEB fetches data from IETBR while
the TxRDY flag is set to 1, and the IEB sets the TxE flag
and enters the wait state. Accordingly, when the TxRDY
flag is not cleared even if data is written to IETBR, an
underrun error occurs and data transmission is terminated.
Note that the TxRDY flag must be cleared in data
transmission by the CPU.
[Setting condition]
When the IEB loads data from IETBR to the transmit shift
register while the TxRDY flag is set to 1
[Clearing condition]
When writing 0 after reading UE = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
2
TTME
0
R/W
Description
Timing Error
Set to 1 if data is not transmitted at the timing specified by
the IEBus protocol during data transmission. The IEB sets
the TxE flag and enters the wait state.
[Setting condition]
When a timing error occurs during data transmission
[Clearing condition]
When writing 0 after reading TTME = 1
1
RO
0
R/W
Overflow of Maximum Number of Transmit Bytes in One
Frame
Indicates that the maximum number of bytes defined by
communications mode have been transmitted because a
NAK has been received from the receive unit and
retransmit has been performed, or that transmission has
not been completed because the message length value
exceeds the maximum number of transmit bytes in one
frame. The IEB sets the TxE flag and enters the wait state.
[Setting condition]
When the transmit has not been completed although the
maximum number of bytes defined by communications
mode have been transmitted
[Clearing condition]
When writing 0 after reading RO = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
0
ACK
0
R/W
Acknowledge bit Status
Indicates the data received in the acknowledge bit of the
data field.
•
Acknowledge bit other than in the data field
The IEB terminates the transmission and enters the
wait state if a NAK is received. In this case, this bit and
the TxE flag are set to 1.
•
Acknowledge bit in the data field
The IEB retransmits data up to the maximum number of
bytes defined by communications mode until an ACK is
received from the receive unit if a NAK is received from
the receive unit during data field transmission. In this
case, when an ACK is received from the receive unit
during retransmission, this flag is not set and
transmission will be continued. When transmission is
terminated without receiving an ACK, this flag is set to
1.
Note: This flag is invalid in broadcast communications.
[Setting condition]
When the acknowledge bit of 1 (NAK) is detected
[Clearing condition]
When writing 0 after reading ACK = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.21 IEBus Receive Status Register (IERSR)
IERSR detects receive data ready, receive start, transmit/receive normal completion, or receive
completion with an error. Each status flag in IERSR corresponds to a bit in the IEIER that
enables/disables each interrupt.
Bit
Bit Name
Initial
Value
R/W
Description
7
RxRDY
1
R/W
Receive Data Ready
Indicates that the receive data is stored in IERBR and that
the receive data can be read. This flag is automatically
cleared by DTC* data transfer. When data is transmitted by
the CPU, this flag must be cleared by software.
[Setting condition]
When data reception has been completed normally and
receive data has been loaded to IERBR.
[Clearing conditions]
•
When writing 0 after reading RxRDY = 1
•
When IERBR data is read by the DTC by a RxRDY
request.
Note: This flag cannot be cleared on the end byte of the
DTC transfer.
6 to 3 
All 0

Reserved
These bits are always read as 0 and cannot be modified.
2
RxS
0
R/W
Receive Start Detection
Indicates that the IEB starts reception.
[Setting conditions]
•
Master reception: When the message length field has
been received from the slave unit correctly after the
arbitration is won and the control field transmission is
completed
•
Slave reception: When the message length field has
been received from the master unit correctly
[Clearing condition]
When writing 0 after reading RxS = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
1
RxF
0
R/W
Receive Normal Completion
Indicates that data for the number of bytes specified by the
message length bits has been received and with no error.
[Setting condition]
When data for the number of bytes specified by the
message length bits has been received normally.
[Clearing condition]
When writing 0 after reading RxF = 1
0
RxE
0
R/W
Receive Error Completion
Indicates that data for the number of bytes specified by the
message length bits is not completed and that the data
reception is terminated. The source of this error can be
checked by the contents of IEREF. This flag is set at the
timing that an error indicated by IEREF occurs. The RxE
flag can be cleared even when the error source flag in
IEREF is set to 1 because the RxE flag is not logically
ORed with the flags in IEREF.
[Setting condition]
When the data for the number of bytes specified by the
message length bits is not completed and when the
reception is terminated.
[Clearing condition]
When writing 0 after reading RxE = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.3.22 IEBus Receive Interrupt Enable Register (IEIER)
IEIER enables/disables IERSR reception ready, receive start, transmit/receive normal completion,
and receive completion with an error interrupts.
Bit
Bit Name
Initial
Value
R/W
Description
7
RxRDYE
0
R/W
Receive Data Ready Interrupt Enable
Enables/disables a receive data ready interrupt.
0: Disables a receive data ready (RxRDY) interrupt
1: Enables a receive data ready (RxRDY) interrupt
6 to 3 
All 0

Reserved
These bits are always read as 0 and cannot be modified.
2
RxSE
0
R/W
Receive Start Interrupt Enable
Enables/disables a receive start (RxS) interrupt.
0: Disables a receive start (RxS) interrupt
1: Enables a receive start (RxS) interrupt
1
RxFE
0
R/W
Receive Normal Completion Enable
Enables or disables a receive normal completion (RxF)
interrupt.
0: Disables a receive normal completion (RxF) interrupt
1: Enables a receive normal completion (RxF) interrupt
0
RxEE
0
R/W
Receive Error Termination Interrupt Enable
Enables or disables a receive error termination (RxE)
interrupt.
0: Disables a receive error termination (RxE) interrupt
1: Enables a receive error termination (RxE) interrupt
14.3.23 IEBus Receive Error Flag Register (IEREF)
IEREF checks the source of an RxE interrupt indicated in IERSR. This register detects an overrun
error, timing error, overflow of a maximum number of bytes in one frame, and parity error.
These flags become valid when the receive start flag (RxS) is set to 1. If an error occurs before the
RxS flag is set to 1, the IEB terminates the communications and enters the wait state. In this case,
these flags will not be set and the RxE flag is not set.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
7 to 4 
Initial
Value
R/W
Description
All 0

Reserved
These bits are always read as 0 and cannot be modified.
3
OVE
0
R/W
Overrun Control Flag
Used to control the overrun during data reception. The IEB
sets the OVE and RxE flags when the IEB receives the
next byte data while the receive data has not been read
(the RxRDY flag is not cleared) and when the parity bit
reception has been started. If this flag remains set until
acknowledge bit transfer, the IEB assumes that an overrun
error has occurred and returns a NAK to the
communications destination unit.
The communications destination unit retransmits data up to
the maximum number of transmit bytes. The IEB, however,
returns a NAK when this flag remains set because the IEB
assumes that the overrun error has not been cleared.
If this flag is cleared to 0, the IEB decides that the overrun
error has been cleared, returns an ACK, and receives the
next data.
In broadcast reception, if this flag is set during
acknowledge bit transmission, the IEB immediately enters
the wait state.
[Setting condition]
When the next byte data is received while the RxRDY flag
is not cleared and when the parity bit of the data is
received.
[Clearing condition]
When writing 0 after reading OVE = 1
2
RTME
0
R/W
Timing Error
Set to 1 if data is not received at the timing specified by the
IEBus protocol during data reception. The IEB sets the RxE
flag and enters the wait state.
[Setting condition]
When a timing error occurs during data reception
[Clearing condition]
When writing 0 after reading RTME = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Bit
Bit Name
Initial
Value
R/W
Description
1
DLE
0
R/W
Overflow of Maximum Number of Receive Bytes in One
Frame
Indicates that the maximum number of bytes defined by
communications mode have been received because a
parity error or overrun error occurred, or that the reception
has not be completed because the message length value
exceeds the maximum number of receive bytes in one
frame. The IEB sets the RxE flag and enters the wait state.
[Setting condition]
When the reception has not been completed although the
maximum number of bytes defined by communications
mode have been received.
[Clearing condition]
When writing 0 after reading DLE = 1
0
PE
0
R/W
Parity Error
Indicates that a parity error has occurred during data field
reception. If a parity error occurs before data field
reception, the IEB immediately enters the wait state and
the PE flag is not set.
If a parity error occurs when the maximum number of
receive bytes in one frame has not been received, the PE
flag is not set. When a parity error occurs, the IEB returns a
NAK to the communications destination unit via the
acknowledge bit. In this case, the communications
destination unit continues retransfer up to the maximum
number of receive bytes in one frame and if the reception
has been completed normally by clearing the parity error,
the PE flag is not set. If the parity error is not cleared when
the reception is terminated before receiving data for the
number of bytes specified by the message length, the PE
flag is set.
In broadcast reception, if a parity error occurs during data
field reception, the IEB enters the wait state immediately
after setting the PE flag.
[Setting condition]
When the parity bit of last data of the data field is not
correct after the maximum number of receive bytes has
been received
[Clearing condition]
When writing 0 after reading PE = 1
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.4
Operation Descriptions
14.4.1
Master Transmit Operation
This section describes an example of master transmission using the DTC after slave reception.
(1) IEB Initialization
(a) Setting the IEBus Control Register (IECTR)
Enable the IEBus pins, select the signal polarity, and select a clock supplied to the IEB. Clear
the LUEE bit to 0 since the transfer is performed by the DTC.
(b) Setting the IEBus Master Unit Address Registers 1 and 2 (IEAR1 and IEAR2)
Specify the master unit address and specify the communications mode in IEAR1.
(c) Setting the IEBus Slave Address Setting Registers 1 and 2 (IESA1 and IESA2)
Specify the communications destination slave unit address.
(d) Setting the IEBus Master Control register (IEMCR)
Select broadcast/normal communications, specify the number of retransfer counts at arbitration
loss, and specify the control bits.
(e) Setting the IEBus Transmit Message Length Register (IETBFL)
Specify the message length bits.
(f) Setting the IEBus Transmit/Runaway Interrupt Enable Register (IEIET)
Enable TxRDY (IETxI), TxS, TxF, and TxE (IETSI) interrupts.
The above registers can be specified in any order. (The register specification order does not affect
the IEB operation.)
(2) DTC Initialization
1. Set the start address of the RAM which stores the register information necessary for the DTC
transfer in the vector address (H'000004D4) to be accessed when a DTC transfer request is
generated.
2. Set the following data from the start address of the RAM.
 Transfer source address (SAR): Start address of the RAM which stores data to be
transmitted in the data field.
 Transfer destination address (DAR): Address (H'FFF808) of the IEBus transmit buffer
register (IETBR)
 Transfer count (CRA): The same value as the IETBFL contents
3. Set DTCEG5 in the DTC enable register G (DTCERG) to enable the TxRDY interrupt
(IETxI).
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
Because the TxRDY flag is retained after a reset, the DTC transfer starts when the IETxI is
enabled and the first data for the data field is written to IETBR. The DTC negates the TxRDY
flag and the first byte of DTC transfer is completed.
(3) Master Transmission Flow
Figure 14.8 shows the master transmission flow. Numbers in the following description correspond
to the number in figure 14.8.
1. After the IEB and DTC have been initialized, a master communications request command is
issued from IECMR. During slave reception, the command execution status flag (CMX) in
IEFLG is set and the master communications request will not be issued.
2. When the slave reception has been completed, the CMX flag is cleared, the master
communications command is executed, and the MRQ flag is set.
3. The transmit start detection flag (TxS) in IETSR is set when arbitration is won and the master
address has been transmitted. In this case, one of the transmit status interrupts (IETSI) is
requested to the CPU, and the TxS flag is cleared in the interrupt handling routine.
4. The IEB loads data to be transmitted in the data field from IETBR when the control and
message length fields have been transmitted and an ACK is received in each field. After that,
the TxRDY flag is set. A DTC transfer request is generated by IETxI and the second byte is
written to the transmit buffer.
5. Similarly, the data field load and transmission are repeated.
6. The DTC completes the data transfer for the number of specified bytes when data to be
transmitted in the last byte is written to. At this time, the DTC does not clear the TxRDY flag.
It, however, clears bit DTCEG5 in the DTC enable register G (DTCERG) so as not to generate
more DTC transfer request.
7. A TxRDY interrupt (IETxI) is issued to the CPU when the DTC transfer is completed. In this
interrupt handling routine, the TxRDY flag can be cleared. However, since a TxRDY interrupt
will be generated again after the last byte transfer, the TxRDY flag remains set. (Note that the
LUEE bit must be cleared to 0 because an underrun error occurs to terminate the transfer if the
LUEE bit in IECTR is set to 1.) Note, however, that the TxRDY interrupt must be disabled
because the TxRDY interrupt is always generated.
8. A transmit normal completion (TxF) interrupt (IETSI) occurs after the last data transfer is
completed. In this case, the CPU clears the TxF flag and completes the normal completion
interrupt and clears the MRQ flag to 0.
Note: As a transmit status interrupt (IETSI), the transmit error termination (TxE) interrupt as
well as the transfer start detection (TxS) and transmit normal completion (TxF) interrupts
must be enabled. If an error termination interrupt is disabled, no interrupt is generated
even if the transmission is terminated by an error.
Rev. 5.00 Aug 08, 2006 page 528 of 982
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
H: Header, MA: Master address field, SA: Slave address field,
CF: Control field, LF: Message length field, D1, D2,..., Dn-1, Dn: Data field
Slave reception
LF
Dn-1
Master transmission
Dn
H
MA
SA
CF
LF
D1
D2
Dn-1
Dn
IECMR
Master transmission request
IEFLG
(1)
(2)
CMX
MRQ
(2)
SRQ
SRE
DTC transfer
of 2nd byte
IETSR
(4)
TxRDY Cleared to 0 byt DTC transfer of 1st byte
(5)
DTC transfer
of 3rd byte
(6)
DTC transfer
of nth byte
(3)
TxS
(8)
TxF
Interrupt
(4)
IETxI (TxRDY)
(TO DTC)
(5)
(6)
(7)
IETxI (TxRDY)
(TO CPU)
(8)
(3)
IETSI
(TO CPU)
Figure 14.8 Master Transmit Operation Timing
14.4.2
Slave Receive Operation
This section describes an example of performing a slave reception using the DTC.
(1) IEB Initialization
(a) Setting the IEBus Control Register (IECTR)
Enable the IEBus pins, select the signal polarity, and select a clock supplied to the IEB. Set the
RE bit to 1 to perform reception. The LUEE bit does not need to be specified.
(b) Setting the IEBus Master Unit Address Registers 1 and 2 (IEAR1 and IEAR2)
Specify the master unit address and specify the communications mode in IEAR1. Compare
with the slave address in the communications frame and receive the frame if matched.
(c) Setting the IEBus Receive Interrupt Enable Register (IEIER)
Enable RxRDY (IERxI), RxS, and RxE (IERSI) interrupts.
Rev. 5.00 Aug 08, 2006 page 529 of 982
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
The above registers can be specified in any order. (The register specification order does not affect
the IEB operation.)
(2) DTC Initialization
1. Set the start address of the RAM which stores the register information necessary for the DTC
transfer in the vector address (H'000004D2) to be accessed when a DTC transfer request is
generated.
2. Specify the following from the start address of the RAM.
 Transfer source address (SAR): Address (H'FFF80D) of the IEBus receive buffer register
(IERBR).
 Transfer destination address (DAR): Start address of the RAM which stores data received
from the data field.
 Transfer count (CRA): Maximum number of transfer bytes in one frame in the transfer
mode.
3. Set DTCEG6 in the DTC enabler register G (DTCERG) to enable the RxRDY interrupt
(IETxI).
Because the above settings are performed before the frame reception, the length of data to be
received cannot be decided. Accordingly, the maximum number of transfer bytes in one frame is
specified as the DTC transfer count.
If the DTC is specified after reception starts, the above settings are performed in the receive start
(RxS) interrupt handling routine. In this case, the transfer count must be the same value as the
contents of the IEBus receive message length register (IERBFL).
(3) Slave Reception Flow
Figure 14.9 shows the slave reception flow. Numbers in the following description correspond to
the number in figure 14.9. In this example, the DTC is specified when the frame reception starts.
1. After the broadcast reception has been completed, the slave reception is performed. The
receive broadcast bit status flag (RSS) in IEFLG retains the previous frame information (set to
1) until the receive start detection flag (RxS) is set to 1. If the RSS flag changes at the timing
of header reception, the interrupt handling of the broadcast reception completion must be
completed before the header reception. Accordingly, the RSS flag is stipulated that it changes
at the timing of starting reception.
2. If data is received up to the message length field, a receive start detection (RxS) interrupt
(receive status interrupt (IERSI)) will occur and the SRE flag is set to 1. In this case, the DTC
initialization described in (2) is performed. After initialization, the RxS flag is cleared to 0.
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3. When the first data is received, the RxRDY flag is set to 1. A DTC transfer request by IERxI
occurs, and the DTC loads data from the IEBus receive buffer register (IERBR) and clears the
RxRDY flag.
4. Similarly, the data field reception and load are repeated.
5. When the last data is received, the DTC completes the data transfer for the specified number of
bytes after loading the receive data to the RAM. In this case, the DTC does not clear the
RxRDY flag. It, however, clears the DTC enable register G (DTCEG). Accordingly, hereafter,
no transfer request will be issued to the DTC.
6. When the DTC transfer has been completed, an RxRDY interrupt (IERxI) is issued to the
CPU. In this interrupt handling routine, the RxRDY flag is cleared.
7. When the last data is received, a receive normal completion (RxF) interrupt (IERSI) occurs. In
this case, the CPU clears the RxF flag in order to complete the normal completion interrupt.
The SRE flag is cleared to 0.
Notes: 1. As a receive status interrupt (IERSI), the receive error termination (RxE) interrupt as
well as the receive start detection (RxS) and receive normal completion (RxF)
interrupts must be enabled. If an error termination interrupt is disabled, no interrupt is
generated even if the reception is terminated by an error.
2. The interrupt occurs after the DTC transfer has been completed. Accordingly, the
interrupt described in item 6 actually occurs after item 7 above.
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H: Header, MA: Master address field, SA: Slave address field,
CF: Control field, LF: Message length field, D1, D2,..., Dn-1, Dn: Data field
Broadcast reception
Dn
Slave reception
H
MA
SA
CF
LF
D1
D2
Dn-1
Dn
IECTR
RE
IEFLG
(1)
RSS
IEFLG
CMX
MRQ
SRQ
(7)
SRE
(5)
DTC transfer DTC transfer DTC transfer DTC transfer
of 1st byte of (n-2)th byte of (n-1)th byte of nth byte
IERSR
(3)
RxRDY
(4)
(2)
RxS
(7)
RxF
Interrupt
(3)
IERxI (RxRDY)
(TO DTC)
(4)
(5)
(6)
IERxI (RxRDY)
(TO CPU)
(2)
IERSI
(TO CPU)
(7)
Figure 14.9 Slave Reception Operation Timing
(4) When an Error Occurs in Broadcast Reception (DEE = 1)
Figure 14.10 shows an example in which a receive error occurs because the receive preparation
cannot be completed (the RxRDY flag is not cleared) until the control field is received in
broadcast reception after the slave reception while the DEE bit is set to 1.
Note: The same as the case in which the RE bit is not set before the control field reception.
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H: Header, MA: Master address field, SA: Slave address field,
CF: Control field, LF: Message length field, D1, D2,..., Dn-1, Dn: Data field
Slave reception
Dn
Broadcast reception
H
MA
SA
CF
LF
D1
D2
Dn-1
Dn
IECTR
Broadcast reception is performed while the DEE bit is set to 1.
RE, DEE
IEFLG
RSS
IEFLG
CMX
MRQ
SRQ
SRE
The RxRDY flag has not been cleared when the control field is received.
IERSR
RxRDY
RxS
RxF
RxE
Set the RxE flag and the master unit address in IEMA1 and IEMA2.
IEMA1
Lower 4 bits of the master address
IEMA2
Upper 8 bits of the master address
Figure 14.10 Error Occurrence in the Broadcast Reception (DEE = 1)
14.4.3
Master Reception
This section shows an example of performing a master reception using the DTC after slave
reception.
(1) IEB Initialization
(a) Setting the IEBus Control Register (IECTR)
Enable the IEBus pins, select the signal polarity, and select a clock supplied to the IEB. Set the
RE bit to 1 to perform reception. The LUEE bit does not need to be specified.
(b) Setting the IEBus Master Unit Address Registers 1 and 2 (IEAR1 and IEAR2)
Specify the master unit address and specify the communications mode in IEAR1. Compare
with the slave address in the communications frame and receive the frame if matched.
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(c) Setting the IEBus Slave Address Setting Registers 1 and 2 (IESA1 and IESA2)
Specify the communications destination slave unit address.
(d) Setting the IEBus Master Control Register (IEMCR)
Select broadcast/normal communications, specify the number of retransfer counts at arbitration
loss, and specify the control bits.
(e) Setting the IEBus Receive Interrupt Enable Register (IEIER)
Enable the RxRDY (IERxI), RxS, RxF, and RxE (IERSI) interrupts.
The above registers can be specified in any order. (The register specification order does not affect
the IEB operation.)
(2) DTC Initialization
1. Set the start address of the RAM which stores the register information necessary for the DTC
transfer in the vector address (H'000004D2) to be accessed when a DTC transfer request is
generated.
2. Set the following data from the start address of the RAM.
 Transfer source address (SAR): Address (H'FFF80D) of the IEBus receive buffer register
(IERBR).
 Transfer destination address (DAR): Start address of the RAM which stores data to be
received from the data field.
 Transfer count (CRA): Maximum number of transfer bytes in one frame in the transfer
mode.
3. Set bit DTCEG6 in the DTC enabler register G (DTCERG), and enable the RxRDY interrupt
(IERxI).
Because the above settings are performed before frame reception, the length of data to be received
cannot be determined. Accordingly, the maximum number of transfer bytes in one frame is
specified as the DTC transfer count.
If the DTC is specified after reception starts, the above settings are performed in the receive start
detection (RxS) interrupt handling routine. In this case, the transfer count must be the same value
as the contents of the IEBus receive message length register (IERBFL).
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(3) Master Reception Flow
Figure 14.11 shows the master reception flow. Numbers in the following description correspond to
the number in figure 14.11. In this example, the DTC is specified when the frame reception starts.
1. After the IEB has been initialized, a master communications request command is issued from
IECMR. During slave reception, the command execution status flag (CMX) in IEFLG is set
and the master communications request will not be issued.
2. The CMX flag is cleared when the slave reception is completed, the master communications
command is executed, and the MRQ flag is set.
3. If the arbitration is won, the master address, slave address, and control field will be
transmitted. An error generated before the control field transmission will be handled as a
transmission error. In this case, the TxE flag is set and the error contents will be reflected in
IETEF.
4. The message length field is received from the slave unit. If no parity error is detected and
reception is performed correctly, the receive start detection flag (RxS) is set to 1. If a parity
error occurs, it is handled as a receive error. A receive start detection (RxS) interrupt (receive
status interrupt (IERSI)) occurs and the DTC initialization described in (2) is performed. After
DTC initialization, the RxS flag is cleared to 0.
5. When the first data is received, the RxRDY flag is set to 1. A DTC transfer request by IERxI
occurs and the DTC loads data from the IEBus receive buffer register (IERBR) and clears the
RxRDY flag.
6. Similarly, the above data field receive and load operations are repeated.
7. When the last data is received, the DTC completes the data transfer for the specified number of
bytes after loading the receive data to the RAM. In this case, the DTC does not clear the
RxRDY flag. It, however, clears the DTC enable register G (DTCEG). Accordingly, hereafter,
no transfer request will be issued to the DTC.
8. When the DTC transfer has been completed, an RxRDY interrupt (IERxI) is issued to the
CPU. In this interrupt handling routine, the RxRDY flag is cleared.
9.
When the last data is received, a receive normal completion (RxF) interrupt (IERSI) occurs.
In this case, the CPU clears the RxF flag to complete the receive normal completion interrupt.
The MRQ flag is cleared to 0.
Notes: 1. As a receive status interrupt (IERSI), an receive error completion (RxE) interrupt as
well as the receive start detection (RxS) and receive normal completion (RxF)
interrupts must be enabled. If a receive error completion interrupt is disabled, no
interrupt is generated even if the reception is terminated by an error.
2. The interrupt occurs after the DTC transfer has been completed. Accordingly, the
interrupt described in item 8 actually occurs after item 9 above.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
H: Header, MA: Master address field, SA: Slave address field,
CF: Control field, LF: Message length field, D1, D2,..., Dn-1, Dn: Data field
Slave reception
Master reception
Dn
H
MA
SA
CF
LF
D1
D2
Dn-1
Dn
(3)
IECTR
RE
IECMR
Master reception request
IEFLG
(1)
(2)
CMX
MRQ
(2)
(9)
SRQ
SRE
DTC transfer DTC transfer DTC transfer DTC transfer
of 1st byte of (n-2)th byte of (n-1)th byte of nth byte
IERSR
(5)
RxRDY
(6)
(7)
(4)
RxS
(9)
RxF
Interrupt
(5)
IERxI (RxRDY)
(TO DTC)
(6)
(7)
(8)
IERxI (RxRDY)
(TO CPU)
(4)
IERSI
(TO CPU)
(9)
Figure 14.11 Master Receive Operation Timing
14.4.4
Slave Transmission
This section shows an example of performing a slave transmission using the DTC after slave
reception.
(1) IEB Initialization
(a) Setting the IEBus Control Register (IECTR)
Enable the IEBus pins, select the signal polarity, and select a clock supplied to the IEB. Clear
the LUEE bit to 0 because transfer by the DTC is performed.
(b) Setting the IEBus Master Unit Address Registers 1 and 2 (IEAR1 and IEAR2)
Specify the master unit address and specify the communications mode in IEAR1. Compare
with the slave address in the communications frame and receive the frame if matched.
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(c) Setting the IEBus Transmit Message Length Register (IETBFL)
Specify the message length bits.
(d) Setting the IEBus Transmit/Runaway Interrupt Enable Register (IEIET)
Enable the TxRDY (IETxI), TxS, and TxE (IETSI) interrupts.
The above registers can be specified in any order. (The register specification order does not affect
the IEB operation.)
(2) DTC Initialization
1. Set the start address of the RAM which stores the register information necessary for the DTC
transfer in the vector address (H'000004D4) to be accessed a DTC transfer request is
generated.
2. Set the following data from the start address of the RAM.
 Transfer source address (SAR): Start address of the RAM which stores data to be
transmitted from the data field.
 Transfer destination address (DAR): Address (H'FFF808) of the IEBus transmit buffer
register (IETBR)
 Transfer count (CRA): The same value as IETBFL
3. Set bit DTCEG5 in the DTC enabler register G (DTCERG), and enable the TxRDY interrupt
(IETxI).
Because the TxRDY flag is retained after reset, the DTC transfer is executed when the IETxI is
enabled and the first data field data is written to IETBR. The DTC negates the TxRDY flag
and the DTC transfer of the first byte is completed.
(3) Slave Transmission Flow
Figure 14.12 shows the slave transmission flow. Numbers in the following description correspond
to the numbers in Figure 14.12.
1. After the IEB and DTC have been initialized, a slave communications request command is
issued from IECMR. During slave reception, the command execution status flag (CMX) in
IEFLG is set and the slave communications request will not be issued.
2. The CMX flag is cleared when the slave reception is completed, the slave communications
command is executed, and the SRQ flag is set.
3. If data up to the control field has been received correctly and if the contents of the control bits
is H'3 or H'7, the transmit start detection flag (TxS) in IETSR register is set to 1. In this case,
the TxS flag is cleared in the TxS interrupt handling routine.
4. The slave then transmits the message length field, and the IEB loads the transmit data in the
data field from IETBR when the ACK is received. Then the TxRDY flag is set to 1. A DTC
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transfer request by IETxI is generated and the second byte data is written to the transmit
buffer.
5. Similarly, the above data field load and transmission operations are repeated.
6. The DTC completes the data transfer for the number of specified bytes when data to be
transmitted in the last byte is written to. At this time, the DTC does not clear the TxRDY flag.
It, however, clears bit DTCEG5 in the DTC enable register G (DTCERG) not to generate more
DTC transfer request.
7. A TxRDY interrupt (IETxI) is issued to the CPU when the DTC transfer is completed. In this
interrupt handling routine, the TxRDY flag can be cleared. However, since the TxRDY
interrupt will be generated again after the last byte transfer, the TxRDY flag remains set. (Note
that the LUEE bit should be cleared to 0 because an underrun error occurs to terminate the
transfer if the LUEE bit in IECTR is set to 1.) Note, however, that the TxRDY interrupt should
be disabled because the TxRDY interrupt is always generated.
8. After the last data transfer has been completed, a transmit normal completion (TxF) interrupt
occurs. In this case, the CPU clears the TxF flag and completes the normal completion
interrupt and clears the SRQ flag to 0.
Notes: 1. As a transmit status interrupt (IETSI), a transmit error termination (TxE) interrupt as
well as the transmit start detection (TxS) and transmit normal completion (TxF)
interrupts must be enabled. If a transmit error completion interrupt is disabled, no
interrupt is generated even if the transfer is terminated by an error.
2. If the control bits sent from the master unit is H'0, H'4, H'5, or H'6 in slave
transmission, the IEB automatically performs processing and the TxS and TxF flags are
not set.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
H: Header, MA: Master address field, SA: Slave address field,
CF: Control field, LF: Message length field, D1, D2,..., Dn-1, Dn: Data field
Slave reception
LF
Dn-1
Slave transmission
Dn
H
MA
SA
CF
LF
D1
D2
Dn-1
Dn
IECMR
Slave transmission request
IEFLG
(1)
(2)
CMX
MRQ
SRQ
(8)
(2)
SRE
DTC transfer
of 2nd byte
IETSR
(4)
TxRDY Cleared to 0 byt DTC transfer of 1st byte
TxS
(5)
DTC transfer
of 3rd byte
DTC transfer
of nth byte
(6)
(3)
(8)
TxF
Interrupt
(4)
IETxI (TxRDY)
(TO DTC)
(5)
(6)
(7)
IETxI (TxRDY)
(TO CPU)
IETSI
(TO CPU)
(3)
(8)
Figure 14.12 Slave Transmit Operation Timing
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14.5
Interrupt Sources
Figures 14.13 and 14.14 show the transmit and receive interrupt sources, respectively.
IETSR
IETxI (TxRDY interrupt)
IEIET
TxRDY
DTC
TxRDYE
IRA
IRAE
TxS
CPU
IETSI
(Transmit status
interrupt)
TxSE
IETEF
TxF
AL
TxFE
UE
(*)
TTME
TxE
TxEE
RO
ACK
Note: * The TxE flag is set at the timing when an error source of IETEF occurs. The TxE flag can be cleared even
when the error source flag in IETEF is set to 1 because the TxE flag is not logically ORed with flags in IETEF.
Figure 14.13 Relationships among Transfer Interrupt Sources
IERSR
IERxI (RxRDY interrupt)
IEIER
RxRDY
DTC
RxRDYE
RxS
RxSE
IEREF
CPU
IERSI
(Transmit status
interrupt)
RxF
OVE
RxFE
RTME
RxEE
DLE
(*)
RxE
PE
Note: * The RxE flag is set at the timing when an error source of IEREF occurs. The RxE flag can be cleared even
when the error source flag in IEREF is set to 1 because the RxE flag is not logically ORed with flags in IEREF.
Figure 14.14 Relationships among Receive Interrupt Sources
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14.6
Usage Notes
14.6.1
Setting Module Stop Mode
The IEB is enabled or disabled by setting the module stop control register. In the initial state, the
IEB is disabled. After the module stop mode is canceled, registers can be accessed. For details, see
section 24, Power-Down Modes.
14.6.2
TxRDY Flag and Underrun Error
1. The TxRDY flag indicates that IETBR is empty. Writing to IETBR by the DTC clears the
TxRDY flag. Meanwhile, the TxRDY flag must be cleared by software since writing to IETBR
by the CPU does not clear the TxRDY flag.
2. If the CPU fails to write to IETBR by the timing of the frame transmission or if the number of
transfer words is less than the length specified by the message length bits, an underrun error
occurs.
3. The IEB decides that an underrun error occurred when the data is loaded from IETBR to the
transmit shift register while the TxRDY flag is set to 1. In this case, the IEB sets the TxE flag
in IETSR and enters the wait state. The UE flag in IETEF is also set to 1.
4. On the receive side, the unit decides that a timing error has occurred because the
communications are terminated.
5. In data transfer using the DTC, the TxRDY flag in IETSR is not cleared after the last byte data
is transferred to IETBR and a CPU interrupt caused by the DTC interrupt will occur.
If the TxRDY flag is not cleared in this CPU interrupt handling routine, an underrun error will
occur when the last byte data is loaded from IETBR to the transmit shift register. In this case,
if the LUEE bit is cleared to 0 (initial value), no underrun error occurs and the last byte of the
data field is transmitted correctly. (If the LUEE bit is set to 1, an underrun error occurs.)
6. Although the DTC is used as described in item 5, if the number of DTC transfer words is less
than the length specified by the message length bits, the LUEE bit setting is invalid. (The
LUEE bit is valid only when data is transmitted for the number of bytes specified by the
message length bits has been transmitted.) In this case, an underrun error occurs, data is
transmitted for one byte less than the DTC transfer words, and the transfer is terminated by a
transmit error.
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14.6.3
RxRDY Flag and Overrun Error
1. The RxRDY flag indicates that IERBR stores data. Reading from IERBR by the DTC clears
the RxRDY flag. Meanwhile, the RxRDY flag must be cleared by software since reading from
IERBR by the CPU does not clear the RxRDY flag.
2. If the CPU fails to read from IERBR by the timing of the frame reception or if the number of
transfer words is less than the length specified by the message length bits, an overrun error
occurs.
3. The IEB receives data while the RxRDY flag is set and sets the OVE flag when the parity bit
reception starts. If the OVE flag is set when the acknowledge bit is transmitted, the IEB
assumes that an overrun error has occurred, returns a NAK, and discards the data in the receive
shift register.
4. On the transmit side, the unit continues retransfer until an ACK is received because it receives
a NAK.
5. If the OVE flag is cleared without loading the receive data from IERBR in the RxE interrupt
handling routine caused when the OVE flag is set to 1, the IEB decides that the overrun error
has been cleared and sends an ACK to other units. In this case, the transmit unit completes the
communications correctly. However, no receive data is loaded from the IERBR and the receive
unit continues reception. Accordingly, in an interrupt handling routine caused by the OVE flag,
receive data must be loaded from IERBR, the RxRDY flag must be cleared. The DTC, thus,
should be ready to receive the next byte, and then the OVE flag must be cleared.
6. Item 5 above will not occur when the DTC transfer words is specified as the IERBFL value.
14.6.4
Error Flag s in the IETEF
(1) AL Flag
The AL Flag is set to 1 when arbitration is lost even if retransfer is performed for the number of
times specified by IEMCR after arbitration has been lost. The AL flag is not set when arbitration is
won during retransfer. If the AL flag is set to 1, the TxE flag is set and the wait state is entered.
(2) UE Flag
If the UE flag is set to 1, the TxE flag is set and the wait state is entered. For details, see section
14.6.2, TxRDY Flag and Underrun Error.
(3) TTME Flag
If a timing error occurs during data transfer, the TTME and TxE flags are set, and the wait state is
entered.
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(4) RO Flag
When retransfer is performed up to the maximum number of transfer bytes defined by the protocol
because of reception of a NAK from the receive side during data field transmission, the number of
transferred bytes may be less than that of bytes specified by the message length. At this time the
RO flag is set. Moreover, when the value of the message length bits is greater than the maximum
number of transfer bytes, the RO flag is also set. The RO flag is not set if the maximum number of
transfer bytes defined by the protocol is specified (for example, 32-byte message length is
specified in mode 1) and the transfer is performed correctly.
If the RO flag is set to 1, the TxE flag is set to 1 and the wait state is entered.
(5) ACK Flag
• If a NAK is received in an acknowledge bit before the message length field transmission, the
ACK flag is set, the TxE flag is set, and then the wait state is entered.
• If a NAK is received in an acknowledge bit of the data field, data is automatically
retransmitted up to the maximum number of transfer bytes defined by the protocol. If an ACK
is received in an acknowledge bit during retransfer and the following data is transmitted
correctly, the ACK flag is not set. If a NAK is received in the last data transfer during the
retransfer for the maximum number of transfer bytes, the ACK flag is set to 1 and the wait
state is entered.
Note: Even if a NAK is received from the receive side during the data field transmission,
retransfer is performed up to the maximum number of transfer bytes defined by the
protocol, and the number of transferred bytes is less than that of bytes specified by the
message length bits, an ACK may be received in the acknowledge bit in the last data
transfer. In this case, the ACK flag is not set although the RO flag is set.
14.6.5
Error Flags in IEREF
(1) OVE Flag
When the OVE flag is set, the RxE flag is also set. If an overrun error is cleared and the OVE flag
is also cleared, the IEBus receive operation is continued. For details, see section 14.6.3, RxRDY
Flag and Overrun Error.
(2) RTME Flag
If a timing error occurs during data reception after reception starts (the RxS flag is set to 1), the
RTME flag is set to 1, RxE flag is set to 1, and the wait state is entered. When a timing error
occurs before reception starts, this flag is not set and the reception frame is discarded.
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(3) DLE Flag
When retransfer is performed up to the maximum number of transfer bytes defined by the protocol
because of reception of a NAK caused by a parity or an overrun error during data field reception,
the number of transferred bytes may be greater than that of bytes specified by the message length.
At this time the DLE flag is set. Moreover, when the value of the message length bits is greater
than the maximum number of transfer bytes, the DLE flag is also set. The DLE flag is not set if the
maximum number of transfer bytes defined by the protocol is specified and the transfer is
performed correctly.
If the DLE flag is set to 1, the RxE flag is set to 1 and the wait state is entered.
(4) PE Flag
If a parity error occurs after reception starts (the RxS flag is set to 1), a NAK is sent to perform rereception.
If a parity error is not cleared when the maximum number of transfer bytes specified by the
protocol is received, the PE flag is set to 1, the RxE flag is set to 1 and the wait state is entered. If
a parity error is cleared during the rereception and if the following data is received correctly, the
PE flag is not set.
Notes: 1. If the reception is performed up to the maximum number of transfer bytes defined by
the protocol because of a parity or an overrun error during data field reception, the
number of receive bytes is less than that of bytes specified by the message length bits,
no parity error or overrun error may occur at the last byte reception. In this case, the
DLE flag is set. However, the OVE and PE flags are not set.
2. The flags in IEREF are set after reception starts. Accordingly, the RxE flag is valid and
set after the RxS flag has been set. If an error occurs before reception starts, the frame
is discarded and no interrupt occurs.
14.6.6
Notes on Slave Transmission
When the slave unit transmits the slave status and upper and lower locked addresses, a parity or an
overrun error occurs in the master reception side and the data cannot be received. Accordingly,
even if a NAK is returned, the slave unit is not capable of retransfer.
In this case, the master unit must discard the frame in which an error occurred and request the
above operation in the master reception to receive the correct frame.
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.6.7
Notes on DTC Specification
When transmit or receive data is transferred by the DTC, bit 5 (for transmission) or bit 6 (for
reception) in DTCERG must be set by the bit manipulation instruction (such as BSET or BCLR).
In this case, other bits (bits 7 and 4 to 0) in DTCERG must not be set to 1.
14.6.8
Error Handling in Transmission
Figure 14.15 shows the operation when a timing error occurs.
When a timing error occurs in data transmission (1), there is a possibility that the next data is
already transferred to the transmit buffer by the DTC and the TxRDY flag that is the DTC
initiation source is already cleared to 0 (2).
In this case, if retransfer is performed, data remained in the transmit buffer (previous frame data)
is transmitted as the first byte data of the data field (3).
To avoid this error, in master transmission, the first byte data in the data field should be written to
the transmit buffer by software instead of using the DTC. After that, data can be transferred by the
DTC. In this case, the SAR (transfer source address) and CRA (transfer counter) should be
specified as follows.
• An address of the on-chip memory that stores the second byte data → SAR
• The number of bytes specified by message length –1 → CRA
Retransfer frame
Transmit error frame
(3)
S
IETSR
MA
SA
CF
1st byte data
transferred
by DTC
LF
D1
2nd byte data
transferred
by DTC
S
MA
SA
CF
Timing error
LF
D2 D1
1st byte data
transferred
by DTC
(2)
TxRDY
(1)
IETEF
TTME
Legend:
S: Start bit, broadcast bit
MA: Master address field
SA: Slave address field
CF: Control field
LF: Message length field
D1, D2, ...Dn-1, Dn: Data field
Figure 14.15 Error Processing in Transfer
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Section 14 IEBus™ Controller (IEB) [H8S/2258 Group]
14.6.9
Power-Down Mode Operation
The IEB stops operation and is initialized in power-down modes such as module stop, watch,
software standby and hardware standby modes.
To initialize the IEB, the module stop mode must be specified. To reduce power consumption
during IEB operation, the sleep mode must be used.
14.6.10 Notes on Middle-Speed Mode
In middle-speed mode, the IEB registers must not be read from or written to.
14.6.11 Notes on Register Access
The IEB registers can be accessed in bytes. The IEB registers must not be accessed in words or
longwords.
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Section 15 Serial Communication Interface (SCI)
Section 15 Serial Communication Interface (SCI)
This LSI has independent serial communication interfaces (SCIs). The SCI can handle both
asynchronous and clocked synchronous serial communication. Serial data communication can be
carried out using standard asynchronous communication chips such as a Universal Asynchronous
Receiver/Transmitter (UART) or an Asynchronous Communication Interface Adapter (ACIA). A
function is also provided for serial communication between processors (multiprocessor
communication function). The SCI also supports an IC card (Smart Card) interface conforming to
ISO/IEC 7816-3 (Identification Card) as a serial communication interface extended function.
15.1
Features
• The number of on-chip channels
H8S/2258 Group, H8S/2239 Group, H8S/2238 Group, and H8S/2237 Group: Four channels
(channels 0, 1, 2, and 3)
H8S/2227 Group: Three channels (channels 0, 1, and 3)
• Choice of asynchronous or clocked synchronous serial communication mode
• Full-duplex communication capability
The transmitter and receiver are mutually independent, enabling transmission and reception to
be executed simultaneously.
Double-buffering is used in both the transmitter and the receiver, enabling continuous
transmission and continuous reception of serial data.
• On-chip baud rate generator allows any bit rate to be selected
External clock can be selected as a transfer clock source (except for in Smart Card interface
mode).
• Choice of LSB-first or MSB-first transfer (except in the case of asynchronous mode 7-bit data)
• Four interrupt sources
Transmit-end, transmit-data-empty, receive-data-full, and receive error — that can issue
requests.
The transmit-data-empty interrupt and receive data full interrupts can be used to activate the
data transfer controller (DTC) or the direct memory access controller (DMAC) (H8S/2239
Group only).
• Module stop mode can be set
Asynchronous mode
• Data length: 7 or 8 bits
• Stop bit length: 1 or 2 bits
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Section 15 Serial Communication Interface (SCI)
• Parity: Even, odd, or none
• Receive error detection: Parity, overrun, and framing errors
• Break detection: Break can be detected by reading the RxD pin level directly in the case of a
framing error
• Average transfer rate generator (SCI_0): 720 kbps, 460.784 kbps, or 115.192 kbps can be
selected at 16-MHz operation (H8S/2239 Group only).
• Transfer rate clock can be input from the TPU (SCI_0) (H8S/2239 Group only).
• Communications between multi-processors are possible.
Clocked Synchronous mode
• Data length: 8 bits
• Receive error detection: Overrun errors detected
• SCI selection (SCI_0) : When IRQ7 = 1, fixed input of TxD0 = Hi-Z and SCK0 = High can be
selected. (H8S/2239 Group only)
Smart Card Interface
• Automatic transmission of error signal (parity error) in receive mode
• Error signal detection and automatic data retransmission in transmit mode
• Direct convention and inverse convention both supported
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Section 15 Serial Communication Interface (SCI)
Bus interface
Figure 15.1 shows a block diagram of the SCI (except SCI_0 of the H8S/2239 Group), and figure
15.2 shows that of the SCI_0 of the H8S/2239 Group.
Module data bus
RDR
TDR
BRR
SCMR
SSR
RxD
TxD
SCR
RSR
TSR
SMR
φ
Baud rate
generator
Transmission/
reception control
Parity generation
Internal
data bus
φ/4
φ/16
φ/64
Clock
Parity check
External clock
SCK
TEI
TXI
RXI
ERI
Legend:
RSR: Receive shift register
RDR: Receive data register
TSR: Transmit shift register
TDR: Transmit data register
SMR: Serial mode register
SCR: Serial control register
SSR: Serial status register
SCMR: Smart card mode register
BRR: Bit rate register
Figure 15.1 Block Diagram of SCI
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Bus interface
Section 15 Serial Communication Interface (SCI)
Module data bus
RDR
SCMR
TDR
Internal
data bus
BRR
SSR
φ
SCR
RxD0
RSR
SMR
TSR
SEMR
φ/16
φ/64
Transmission/
reception control
TxD0
Clock
Parity generation
PG1/IRQ7
φ/4
Baud rate
generator
TEI
TXI
RXI
ERI
Parity check
C/A
CKE1
SSE
Average
transfer rate
generator
External clock
SCK0
10.667-MHz operation
115.152 kbps
460.606 kbps
16-MHz operation
115.196 kbps
460.784 kbps
720 kbps
TIOCA1
TCLKA
TPU
TIOCA2
Legend:
RSR: Receive shift register
RDR: Receive data register
TSR: Transmit shift register
TDR: Transmit data register
SMR: Serial mode register
SCR:
SSR:
SCMR:
BRR:
SEMR:
Serial control register
Serial status register
Smart card mode register
Bit rate register
Serial expansion mode register
Figure 15.2 Block Diagram of SCI_0 of H8S/2239 Group
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Section 15 Serial Communication Interface (SCI)
15.2
Input/Output Pins
Table 15.1 shows the pin configuration for each SCI channel.
Table 15.1 Pin Configuration
Channel
Pin Name*
I/O
Function
0
SCK0
I/O
SCI0 clock input/output
RxD0
Input
SCI0 receive data input
TxD0
Output
SCI0 transmit data output
SCK1
I/O
SCI1 clock input/output
RxD1
Input
SCI1 receive data input
TxD1
Output
SCI1 transmit data output
SCK2
I/O
SCI2 clock input/output
RxD2
Input
SCI2 receive data input
TxD2
Output
SCI2 transmit data output
SCK3
I/O
SCI3 clock input/output
RxD3
Input
SCI3 receive data input
TxD3
Output
SCI3 transmit data output
1
2
*2
3
1
Notes: 1. Pin names SCK, RxD, and TxD are used in the text for all channels, omitting the
channel designation.
2. The channel is not provided for the H8S/2227 Group.
15.3
Register Descriptions
The SCI has the following registers for each channel. For details on register addresses and register
states during each process, refer to appendix A, Internal I/O Register. The serial mode register
(SMR), serial status register (SSR), and serial control register (SCR) are described separately for
normal serial communication interface mode and Smart Card interface mode because their bit
functions differ in part.
• Receive shift register (RSR)
• Receive data register (RDR)
• Transmit data register (TDR)
• Transmit shift register (TSR)
• Serial mode register (SMR)
• Serial control register (SCR)
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Section 15 Serial Communication Interface (SCI)
• Serial status register (SSR)
• Smart card mode register (SCMR)
• Bit rate register (BRR)
• Serial expansion mode register (SEMR0)*
Note: * This register is in the channel 0 of the H8S/2239 Group only.
15.3.1
Receive Shift Register (RSR)
RSR is a shift register that is used to receive serial data input to the RxD pin and convert it into
parallel data. When one byte of data has been received, it is transferred to RDR automatically.
RSR cannot be directly accessed by the CPU.
15.3.2
Receive Data Register (RDR)
RDR is an 8-bit register that stores received data. When the SCI has received one byte of serial
data, it transfers the received serial data from RSR to RDR, where it is stored. After this, RSR is
receive-enabled. As RSR and RDR function as a double buffer in this way, continuous receive
operations are possible. After confirming that the RDRF bit in SSR is set to 1, read RDR only
once.
RDR cannot be written to by the CPU.
RDR is initialized to H'00 by a reset, in standby mode, watch mode, subactive mode, subsleep
mode, or module stop mode.
15.3.3
Transmit Data Register (TDR)
TDR is an 8-bit register that stores data for transmission. When the SCI detects that TSR is empty,
it transfers the transmit data written in TDR to TSR and starts transmission. The double-buffered
structure of TDR and TSR enables continuous serial transmission. If the next transmit data has
already been written to TDR during serial transmission, the SCI transfers the written data to TSR
to continue transmission. Although TDR can be read or written to by the CPU at all times, to
achieve reliable serial transmission, write transmit data to TDR only once after confirming that the
TDRE bit in SSR is set to 1.
TDR is initialized to H'FF by a reset, in standby mode, watch mode, subactive mode, subsleep
mode or module stop mode.
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Section 15 Serial Communication Interface (SCI)
15.3.4
Transmit Shift Register (TSR)
TSR is a shift register that transmits serial data. To perform serial data transmission, the SCI first
transfers transmit data from TDR to TSR, then sends the data to the TxD pin. TSR cannot be
directly accessed by the CPU.
15.3.5
Serial Mode Register (SMR)
SMR is used to set the SCI’s serial transfer format and select the baud rate generator clock source.
Some bit functions of SMR differ between normal serial communication interface mode and Smart
Card interface mode.
• Normal Serial Communication Interface Mode (When SMIF in SCMR is 0)
Bit
Bit Name
Initial
Value
R/W
Description
7
C/A
0
R/W
Communication Mode
0: Asynchronous mode
1: Clocked synchronous mode
6
CHR
0
R/W
Character Length (enabled only in asynchronous
mode)
0: Selects 8 bits as the data length.
1: Selects 7 bits as the data length. LSB-first is
fixed and the MSB (bit 7) of TDR is not
transmitted in transmission.
In clocked synchronous mode, a fixed data length
of 8 bits is used.
5
PE
0
R/W
Parity Enable (enabled only in asynchronous
mode)
When this bit is set to 1, the parity bit is added to
transmit data before transmission, and the parity
bit is checked in reception. For a multiprocessor
format, parity bit addition and checking are not
performed regardless of the PE bit setting.
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
4
O/E
0
R/W
Parity Mode (enabled only when the PE bit is 1 in
asynchronous mode)
0: Selects even parity.
When even parity is set, parity bit addition is
performed in transmission so that the total
number of 1 bits in the transmit character plus
the parity bit is even. In reception, a check is
performed to see if the total number of 1 bits in
the receive character plus parity bit is even.
1: Selects odd parity.
When odd parity is set, parity bit addition is
performed in transmission so that the total
number of 1 bits in the transmit character plus
the parity bit is odd. In reception, a check is
performed to see if the total number of 1 bits in
the receive character plus the parity bit is odd.
3
STOP
0
R/W
Stop Bit Length (enabled only in asynchronous
mode)
Selects the stop bit length in transmission.
0: 1 stop bit
1: 2 stop bits
In reception, only the first stop bit is checked. If the
second stop bit is 0, it is treated as the start bit of
the next transmit character.
2
MP
0
R/W
Multiprocessor Mode (enabled only in
asynchronous mode)
When this bit is set to 1, the multiprocessor
communication function is enabled. The PE bit and
O/E bit settings are invalid in multiprocessor mode.
For details, see section 15.5, Multiprocessor
Communication Function.
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
1
CKS1
0
R/W
Clock Select 0 and 1
0
CKS0
0
R/W
These bits select the clock source for the baud rate
generator.
00: φ clock (n = 0)
01: φ/4 clock (n = 1)
10: φ/16 clock (n = 2)
11: φ/64 clock (n = 3)
For the relationship between the bit rate register
setting and the baud rate, see section 15.3.9, Bit
Rate Register (BRR). n is the decimal
representation of the value of n in BRR (see
section 15.3.9, Bit Rate Register (BRR)).
• Smart Card Interface Mode (When SMIF in SCMR is 1)
Bit
Bit Name
Initial
Value
R/W
Description
7
GM
0
R/W
GSM Mode
When this bit is set to 1, the SCI operates in GSM
mode. In GSM mode, the timing of the TEND
setting is advanced by 11.0 etu (Elementary Time
Unit: the time for transfer of 1 bit), and clock output
control mode addition is performed. For details,
refer to section 15.7.8, Clock Output Control.
0: Normal smart card interface mode operation
(initial value)
•
The TEND flag is generated 12.5 etu (11.5 etu
in the block transfer mode) after the beginning
of the start bit.
•
Clock output on/off control only
1: GSM mode operation in smart card interface
mode
•
The TEND flag is generated 11.0 etu after the
beginning of the start bit.
•
In addition to clock output on/off control,
high/low fixed control is supported (set using
SCR).
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
6
BLK
0
R/W
When this bit is set to 1, the SCI operates in block
transfer mode. For details on block transfer mode,
refer to section 15.7.3, Block Transfer Mode.
0: Normal smart card interface mode operation
(initial value)
•
Error signal transmission, detection, and
automatic data retransmission are performed.
•
The TXI interrupt is generated by the TEND
flag.
•
The TEND flag is set 12.5 etu (11.0 etu in the
GSM mode) after transmission starts.
1: Operation in block transfer mode
5
PE
0
R/W
•
Error signal transmission, detection, and
automatic data retransmission are not
performed.
•
The TXI interrupt is generated by the TDRE
flag.
•
The TEND flag is set 11.5 etu (11.0 etu in the
GSM mode) after transmission starts.
Parity Enable (enabled only in asynchronous
mode)
When this bit is set to 1, the parity bit is added to
transmit data in transmission, and the parity bit is
checked in reception. In Smart Card interface
mode, this bit must be set to 1.
4
O/E
0
R/W
Parity Mode (enabled only when the PE bit is 1 in
asynchronous mode)
0: Selects even parity.
1: Selects odd parity.
For details on setting this bit in Smart Card
interface mode, refer to section 15.7.2, Data
Format (Except for Block Transfer Mode).
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
3
BCP1
0
R/W
Base Clock Pulse 0 and 1
2
BCP0
0
R/W
These bits specify the number of base clock
periods in a 1-bit transfer interval on the Smart
Card interface.
00: 32 clock (S = 32)
01: 64 clock (S = 64)
10: 372 clock (S = 372)
11: 256 clock (S = 256)
For details, refer to section 15.7.4, Receive Data
Sampling Timing and Reception Margin. S stands
for the value of S in BRR (see section 15.3.9, Bit
Rate Register (BRR)).
1
CKS1
0
R/W
Clock Select 0 and 1
0
CKS0
0
R/W
These bits select the clock source for the baud rate
generator.
00: φ clock (n = 0)
01: φ/4 clock (n = 1)
10: φ/16 clock (n = 2)
11: φ/64 clock (n = 3)
For the relationship between the bit rate register
setting and the baud rate, see section 15.3.9, Bit
Rate Register (BRR). n is the decimal
representation of the value of n in BRR (see
section 15.3.9, Bit Rate Register (BRR)).
Note: etu (Elementary Time Unit): Time for transfer of 1 bit
15.3.6
Serial Control Register (SCR)
SCR is a register that enables or disables SCI transfer operations and interrupt requests, and is also
used to selection of the transfer clock source. For details on interrupt requests, refer to section
15.9, Interrupt Sources. Some bit functions of SCR differ between normal serial communication
interface mode and Smart Card interface mode.
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Section 15 Serial Communication Interface (SCI)
• Normal Serial Communication Interface Mode (When SMIF in SCMR is 0)
Bit
Bit Name
Initial
Value
R/W
Description
7
TIE
0
R/W
Transmit Interrupt Enable
When this bit is set to 1, the TXI interrupt request is
enabled.
TXI interrupt request cancellation can be
performed by reading 1 from the TDRE flag in
SSR, then clearing it to 0, or clearing the TIE bit to
0.
6
RIE
0
R/W
Receive Interrupt Enable
When this bit is set to 1, RXI and ERI interrupt
requests are enabled.
RXI and ERI interrupt request cancellation can be
performed by reading 1 from the RDRF, FER,
PER, or ORER flag in SSR, then clearing the flag
to 0, or clearing the RIE bit to 0.
5
TE
0
R/W
Transmit Enable
When this bit s set to 1, transmission is enabled.
In this state, serial transmission is started when
transmit data is written to TDR and the TDRE flag
in SSR is cleared to 0.
SMR setting must be performed to decide the
transfer format before setting the TE bit to 1. When
this bit is cleared to 0, the transmission operation is
disabled, and the TDRE flag is fixed at 1.
4
RE
0
R/W
Receive Enable
When this bit is set to 1, reception is enabled.
Serial reception is started in this state when a start
bit is detected in asynchronous mode or serial
clock input is detected in clocked synchronous
mode.
SMR setting must be performed to decide the
reception format before setting the RE bit to 1.
Clearing the RE bit to 0 does not affect the RDRF,
FER, and ORER flags, which retain their states.
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
3
MPIE
0
R/W
Multiprocessor Interrupt Enable (enabled only
when the MP bit in SMR is 1 in asynchronous
mode)
When this bit is set to 1, receive data in which the
multiprocessor bit is 0 is skipped, and setting of the
RDRF, FER, and ORER status flags in SSR is
prohibited. On receiving data in which the
multiprocessor bit is 1, this bit is automatically
cleared and normal reception is resumed. For
details, refer to section 15.5, Multiprocessor
Communication Function.
When receive data including MPB = 0 is received,
receive data transfer from RSR to RDR, receive
error detection, and setting of the RERF, FER, and
ORER flags in SSR, are not performed.
When receive data including MPB = 1 is received,
the MPB bit in SSR is set to 1, the MPIE bit is
cleared to 0 automatically, and generation of RXI
and ERI interrupts (when the TIE and RIE bits in
SCR are set to 1) and FER and ORER flag setting
are enabled.
2
TEIE
0
R/W
Transmit End Interrupt Enable
This bit is set to 1, TEI interrupt request is enabled.
TEI cancellation can be performed by reading 1
from the DRE flag in SSR, then clearing it to 0 and
clearing the TEND flag to 0, or clearing the TEIE
bit to 0.
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
1
CKE1
0
R/W
Clock Enable 0 and 1
0
CKE0
0
R/W
Selects the clock source and SCK pin function.
Asynchronous mode
00: On-chip baud rate generator
SCK pin functions as I/O port
01: On-chip baud rate generator
Outputs a clock of the same frequency as the
bit rate from the SCK pin.
1×: External clock
Inputs a clock with a frequency 16 times the bit
rate from the SCK pin.
Clocked synchronous mode
0×: Internal clock (SCK pin functions as clock
output)
1×: External clock (SCK pin functions as clock
input)
Legend:
×: Don’t care
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Section 15 Serial Communication Interface (SCI)
• Smart Card Interface Mode (When SMIF in SCMR is 1)
Bit
Bit Name
Initial
Value
R/W
Description
7
TIE
0
R/W
Transmit Interrupt Enable
When this bit is set to 1, TXI interrupt request is
enabled.
TXI interrupt request cancellation can be
performed by reading 1 from the TDRE flag in
SSR, then clearing it to 0, or clearing the TIE bit to
0.
6
RIE
0
R/W
Receive Interrupt Enable
When this bit is set to 1, RXI and ERI interrupt
requests are enabled.
RXI and ERI interrupt request cancellation can be
performed by reading 1 from the RDRF, FER,
PER, or ORER flag in SSR, then clearing the flag
to 0, or clearing the RIE bit to 0.
5
TE
0
R/W
Transmit Enable
When this bit s set to 1, transmission is enabled.
In this state, serial transmission is started when
transmit data is written to TDR and the TDRE flag
in SSR is cleared to 0.
SMR setting must be performed to decide the
transfer format before setting the TE bit to 1. When
this bit is cleared to 0, the transmission operation is
disabled, and the TDRE flag is fixed at 1.
4
RE
0
R/W
Receive Enable
When this bit is set to 1, reception is enabled.
Serial reception is started in this state when a start
bit is detected in asynchronous mode or serial
clock input is detected in clocked synchronous
mode.
SMR setting must be performed to decide the
reception format before setting the RE bit to 1.
Clearing the RE bit to 0 does not affect the RDRF,
FER, and ORER flags, which retain their states.
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
3
MPIE
0
R/W
Multiprocessor Interrupt Enable (enabled only
when the MP bit in SMR is 1 in asynchronous
mode)
Write 0 to this bit in Smart Card interface mode.
When receive data including MPB = 0 is received,
receive data transfer from RSR to RDR, receive
error detection, and setting of the RERF, FER, and
ORER flags in SSR, are not performed.
When receive data including MPB = 1 is received,
the MPB bit in SSR is set to 1, the MPIE bit is
cleared to 0 automatically, and generation of RXI
and ERI interrupts (when the TIE and RIE bits in
SCR are set to 1) and FER and ORER flag setting
are enabled.
2
TEIE
0
R/W
Transmit End Interrupt Enable
Write 0 to this bit in Smart Card interface mode.
TEI cancellation can be performed by reading 1
from the TDRE flag in SSR, then clearing it to 0
and clearing the TEND flag to 0, or clearing the
TEIE bit to 0.
1
CKE1
0
0
CKE0
0
R/W
Clock Enable 0 and 1
Enables or disables clock output from the SCK pin.
The clock output can be dynamically switched in
GSM mode. For details, refer to section 15.7.8,
Clock Output Control.
When the GM bit in SMR is 0:
00: Output disabled (SCK pin can be used as an
I/O port pin)
01: Clock output
1×: Reserved
When the GM bit in SMR is 1:
00: Output fixed low
01: Clock output
10: Output fixed high
11: Clock output
Legend:
×: Don’t care
Rev. 5.00 Aug 08, 2006 page 562 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
15.3.7
Serial Status Register (SSR)
SSR is a register containing status flags of the SCI and multiprocessor bits for transfer. 1 cannot be
written to flags TDRE, RDRF, ORER, PER, and FER; they can only be cleared. Some bit
functions of SSR differ between normal serial communication interface mode and Smart Card
interface mode.
• Normal Serial Communication Interface Mode (When SMIF in SCMR is 0)
Bit
7
Bit Name
TDRE
Initial
Value
R/W
Description
1
1
R/(W)*
Transmit Data Register Empty
Displays whether TDR contains transmit data.
[Setting conditions]
•
When the TE bit in SCR is 0
•
When data is transferred from TDR to TSR and
data can be written to TDR
[Clearing conditions]
•
•
When 0 is written to TDRE after reading TDRE
=1
2
3
When the DMAC* or the DTC* is activated by
a TXI interrupt request and writes data to TDR
6
RDRF
0
1
R/(W)*
Receive Data Register Full
Indicates that the received data is stored in RDR.
[Setting condition]
When serial reception ends normally and receive
data is transferred from RSR to RDR
[Clearing conditions]
•
•
When 0 is written to RDRF after reading RDRF
=1
2
3
When the DMAC* or the DTC* is activated by
an RXI interrupt and transferred data from RDR
The RDRF flag is not affected and retains their
previous values when the RE bit in SCR is cleared
to 0.
If reception of the next data is completed while the
RDRF flag is still set to 1, an overrun error will
occur and the receive data will be lost.
Rev. 5.00 Aug 08, 2006 page 563 of 982
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Section 15 Serial Communication Interface (SCI)
Bit
5
Bit Name
ORER
Initial
Value
R/W
Description
0
1
R/(W)*
Overrun Error
Indicates that an overrun error occurred during
reception, causing abnormal termination.
[Setting condition]
When the next serial reception is completed while
RDRF = 1
The receive data prior to the overrun error is
retained in RDR, and the data received
subsequently is lost. Also, subsequent serial
reception cannot be continued while the ORER flag
is set to 1. In clocked synchronous mode, serial
transmission cannot be continued either.
[Clearing condition]
When 0 is written to ORER after reading ORER =
1
The ORER flag is not affected and retains its
previous state when the RE bit in SCR is cleared to
0.
4
FER
0
R/(W)*
1
Framing Error
Indicates that a framing error occurred during
reception in asynchronous mode, causing
abnormal termination.
[Setting condition]
When the stop bit is 0
In 2 stop bit mode, only the first stop bit is checked
for a value to 1; the second stop bit is not checked.
If a framing error occurs, the receive data is
transferred to RDR but the RDRF flag is not set.
Also, subsequent serial reception cannot be
continued while the FER flag is set to 1. In clocked
synchronous mode, serial transmission cannot be
continued, either.
[Clearing condition]
When 0 is written to FER after reading FER = 1
In 2-stop-bit mode, only the first stop bit is
checked.
The FER flag is not affected and retains its
previous state when the RE bit in SCR is cleared to
0.
Rev. 5.00 Aug 08, 2006 page 564 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Bit
3
Bit Name
PER
Initial
Value
R/W
Description
0
1
R/(W)*
Parity Error
Indicates that a parity error occurred during
reception using parity addition in asynchronous
mode, causing abnormal termination.
[Setting condition]
When a parity error is detected during reception
If a parity error occurs, the receive data is
transferred to RDR but the RDRF flag is not set.
Also, subsequent serial reception cannot be
continued while the PER flag is set to 1. In clocked
synchronous mode, serial transmission cannot be
continued, either.
[Clearing condition]
When 0 is written to PER after reading PER = 1
The PER flag is not affected and retains its previous
state when the RE bit in SCR is cleared to 0.
2
TEND
1
R
Transmit End
Indicates that transmission has been ended.
[Setting conditions]
•
When the TE bit in SCR is 0
•
When TDRE = 1 at transmission of the last bit
of a 1-byte serial transmit character
[Clearing conditions]
•
•
When 0 is written to TDRE after reading TDRE
=1
2
3
When the DMAC* or the DTC* is activated by
a TXI interrupt request and transfer
transmission data to TDR
1
MPB
0
R
Multiprocessor Bit
MPB stores the multiprocessor bit in the receive
data. When the RE bit in SCR is cleared to 0 its
previous state is retained.
0
MPBT
0
R/W
Multiprocessor Bit Transfer
MPBT stores the multiprocessor bit to be added to
the transmit data.
Rev. 5.00 Aug 08, 2006 page 565 of 982
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Section 15 Serial Communication Interface (SCI)
Notes: 1. Only a 0 can be written to this bit, to clear the flag.
2. Supported only by the H8S/2239 Group.
3. DTC can clear this bit only when DISEL is 0 with the transfer counter not being 0.
• Smart Card Interface Mode (When SMIF in SCMR is 1)
Bit
7
Bit Name
TDRE
Initial
Value
R/W
Description
1
1
R/(W)*
Transmit Data Register Empty
Indicates whether TDR contains transmit data.
[Setting conditions]
•
When the TE bit in SCR is 0
•
When data is transferred from TDR to TSR and
data can be written to TDR
[Clearing conditions]
•
•
When 0 is written to TDRE after reading TDRE
=1
2
3
When the DMAC* or the DTC* is activated by
a TXI interrupt request and writes data to TDR
6
RDRF
0
1
R/(W)*
Receive Data Register Full
Indicates that the received data is stored in RDR.
[Setting condition]
When serial reception ends normally and receive
data is transferred from RSR to RDR
[Clearing conditions]
•
•
When 0 is written to RDRF after reading RDRF
=1
3
When the DTC* is activated by an RXI
interrupt and transferred data from RDR
The RDRF flag is not affected and retains their
previous values when the RE bit in SCR is cleared
to 0.
If reception of the next data is completed while the
RDRF flag is still set to 1, an overrun error will
occur and the receive data will be lost.
Rev. 5.00 Aug 08, 2006 page 566 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Bit
5
Bit Name
ORER
Initial
Value
R/W
Description
0
1
R/(W)*
Overrun Error
Indicates that an overrun error occurred during
reception, causing abnormal termination.
[Setting condition]
When the next serial reception is completed while
RDRF = 1
The receive data prior to the overrun error is
retained in RDR, and the data received
subsequently is lost. Also, subsequent serial
cannot be continued while the ORER flag is set to
1. In clocked synchronous mode, serial
transmission cannot be continued, either.
[Clearing condition]
When 0 is written to ORER after reading ORER =
1
The ORER flag is not affected and retains its
previous state when the RE bit in SCR is cleared to
0.
4
ERS
0
R/(W)*
1
Error Signal Status
Indicates that the status of an error signal returned
from the receiving end at reception
[Setting condition]
When the low level of the error signal is sampled
[Clearing condition]
When 0 is written to ERS after reading ERS = 1
The ERS flag is not affected and retains its
previous state when the TE bit in SCR is cleared to
0.
Rev. 5.00 Aug 08, 2006 page 567 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Bit
3
Bit Name
PER
Initial
Value
R/W
Description
0
1
R/(W)*
Parity Error
Indicates that a parity error occurred during
reception using parity addition in asynchronous
mode, causing abnormal termination.
[Setting condition]
When a parity error is detected during reception
If a parity error occurs, the receive data is
transferred to RDR but the RDRF flag is not set.
Also, subsequent serial reception cannot be
continued while the PER flag is set to 1. In clocked
synchronous mode, serial transmission cannot be
continued, either.
[Clearing condition]
When 0 is written to PER after reading PER = 1
The PER flag is not affected and retains its
previous state when the RE bit in SCR is cleared to
0.
Rev. 5.00 Aug 08, 2006 page 568 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
2
TEND
1
R
Transmit End
This bit is set to 1 when no error signal has been
sent back from the receiving end and the next
transmit data is ready to be transferred to TDR.
[Setting conditions]
•
When the TE bit in SCR is 0 and the ERS bit is
also 0
•
When the ERS bit is 0 and the TDRE bit is 1
after the specified interval following
transmission of 1-byte data. The timing of bit
setting differs according to the register setting
as follows:
When GM = 0 and BLK = 0, 12.5 etu after
transmission starts
When GM = 0 and BLK = 1, 11.5 etu after
transmission starts
When GM = 1 and BLK = 0, 11.0 etu after
transmission starts
When GM = 1 and BLK = 1, 11.0 etu after
transmission starts
[Clearing conditions]
•
•
When 0 is written to TDRE after reading TDRE
=1
2
3
When the DMAC* or the DTC* is activated by
a TXI interrupt and transfers transmission data
to TDR
1
MPB
0
R
Multiprocessor Bit
This bit is not used in Smart Card interface mode.
0
MPBT
0
R/W
Multiprocessor Bit Transfer
Write 0 to this bit in Smart Card interface mode.
Notes: 1. Only 0 can be written to this bit, to clear the flag.
2. Supported only by the H8S/2239 Group.
3. DTC can clear this bit only when DISEL is 0 with the transfer counter not being 0.
Rev. 5.00 Aug 08, 2006 page 569 of 982
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Section 15 Serial Communication Interface (SCI)
15.3.8
Smart Card Mode Register (SCMR)
SCMR is a register that selects Smart Card interface mode and its transfer format.
Bit
Bit Name
Initial
Value
R/W
Description
7 to 4
—
All 1
—
Reserved
These bits are always read as 1, and cannot be
modified.
3
SDIR
0
R/W
Smart Card Data Transfer Direction
Selects the serial/parallel conversion format.
0: LSB-first in transfer
1: MSB-first in transfer
The bit setting is valid only when the transfer data
format is 8 bits. For 7-bit data, LSB-first is fixed.
2
SINV
0
R/W
Smart Card Data Invert
Specifies inversion of the data logic level. The
SINV bit does not affect the logic level of the parity
bit. To invert the parity bit, invert the O/E bit in
SMR.
0: TDR contents are transmitted as they are.
Receive data is stored as it is in RDR
1: TDR contents are inverted before being
transmitted. Receive data is stored in inverted
form in RDR
1
—
1
—
Reserved
This bit is always read as 1, and cannot be
modified.
0
SMIF
0
R/W
Smart Card Interface Mode Select
This bit is set to 1 to make the SCI operate in
Smart Card interface mode.
0: Normal asynchronous mode or clocked
synchronous mode
1: Smart card interface mode
Rev. 5.00 Aug 08, 2006 page 570 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
15.3.9
Bit Rate Register (BRR)
BRR is an 8-bit register that adjusts the bit rate. As the SCI performs baud rate generator control
independently for each channel, different bit rates can be set for each channel. Table 15.2 shows
the relationships between the N setting in BRR and bit rate B for normal asynchronous mode,
clocked synchronous mode, and Smart Card interface mode. The initial value of BRR is H'FF, and
it can be read or written to by the CPU at all times.
Table 15.2 The Relationships between the N Setting in BRR and Bit Rate B
Communication
Mode
Asynchronous
Mode
ABCS bit*
0

Smart Card
Interface Mode

Error
φ × 10
φ × 106
6
B=
1
Clocked
Synchronous
Mode
Bit Rate
B=
B=
B=
64 × 2
2n−1
Error (%) = {
× (N + 1)
φ × 106
Error (%) = {
32 × 2 2n−1 × (N + 1)
8×2
S×2
2n+1
φ × 106
B × 32 × 2 2n−1 × (N + 1)
−1 } × 100
−1 } × 100

φ × 106
2n−1
B × 64 × 2 2n−1 × (N + 1)
× (N + 1)
φ × 106
Error (%) = {
× (N + 1)
φ × 106
B × S × 2 2n+1 × (N + 1)
−1 } × 100
Legend:
B:
Bit rate (bit/s)
N:
BRR setting for baud rate generator (0 ≤ N ≤ 255)
φ:
Operating frequency (MHz)
n and S: Determined by the SMR settings shown in the following tables.
Note: * If the ABCS bit is set to 1, SCI_0 on the H8S/2239 Group only valid bit rate.
SMR Setting
SMR Setting
CKS1
CKS0
Clock
Source
0
0
φ
0
0
0
32
0
1
φ/4
1
0
1
64
1
0
φ/16
2
1
0
372
1
1
φ/64
3
1
1
256
n
BCP1
BCP0
S
Rev. 5.00 Aug 08, 2006 page 571 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Table 15.3 shows sample N settings in BRR in normal asynchronous mode. Table 15.4 shows the
maximum bit rate for each frequency in normal asynchronous mode. Table 15.6 shows sample N
settings in BRR in clocked synchronous mode. Table 15.8 shows sample N settings in BRR in
Smart Card interface mode. In Smart Card interface mode, S (the number of base clock periods in
a 1-bit transfer interval) can be selected. For details, refer to section 15.7.4, Receive Data
Sampling Timing and Reception Margin. Tables 15.5 and 15.7 show the maximum bit rates with
external clock input.
When the ABCS bit in SEMR_0 of SCI_0 is set to 1 in asynchronous mode, the maximum bit rate
is twice the value shown in tables 15.4 and 15.5 (valid for H8S/2239 Group only).
Table 15.3 BRR Settings for Various Bit Rates (Asynchronous Mode)
Operating Frequency φ (MHz)
2*
2.097152*
3
2.4576*
3
3*
3
3
n
N
Error
(%)
n
N
Error
(%)
n
N
Error (%)
141 0.03
1
148 –0.04
1
174
–0.26
1
212
0.03
1
103 0.16
1
108 0.21
1
127
0.00
1
155
0.16
300
0
207 0.16
0
217 0.21
0
255
0.00
1
77
0.16
600
0
103 0.16
0
108 0.21
0
127
0.00
0
155
0.16
1200
0
51
0.16
0
54
–0.70
0
63
0.00
0
77
0.16
2400
0
25
0.16
0
26
1.14
0
31
0.00
0
38
0.16
4800
0
12
0.16
0
13
–2.48
0
15
0.00
0
19
–2.34
9600
—
—
—
0
6
–2.48
0
7
0.00
0
9
–2.34
19200
—
—
—
—
—
—
0
3
0.00
0
4
–2.34
31250
0
1
0.00
—
—
—
—
—
—
0
2
0.00
38400
—
—
—
—
—
—
0
1
0.00
—
—
—
Bit Rate
1
n
(bps)*
N
110
1
150
Error
(%)
Rev. 5.00 Aug 08, 2006 page 572 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Operating Frequency φ (MHz)
3.6864
*3
Bit Rate
1
(bps)*
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
2
64
0.70
2
70
0.03
2
86
0.31
2
88
–0.25
150
1
191
0.00
1
207 0.16
1
255
0.00
2
64
0.16
300
1
95
0.00
1
103 0.16
1
127
0.00
1
129
0.16
600
0
191
0.00
0
207 0.16
0
255
0.00
1
64
0.16
1200
0
95
0.00
0
103 0.16
0
127
0.00
0
129
0.16
2400
0
47
0.00
0
51
0.16
0
63
0.00
0
64
0.16
4800
0
23
0.00
0
25
0.16
0
31
0.00
0
32
–1.36
9600
0
11
0.00
0
12
0.16
0
15
0.00
0
15
1.73
19200
0
5
0.00
—
—
—
0
7
0.00
0
7
1.73
31250
—
—
—
0
3
0.00
0
4
–1.70
0
4
0.00
38400
0
2
0.00
—
—
—
0
3
0.00
0
3
1.73
4*
4.9152*
3
5*
3
3
Operating Frequency φ (MHz)
6
*3
6.144*
7.3728*
3
8*
3
3
n
N
Error
(%)
n
N
Error
(%)
108 0.08
2
130
–0.07
2
141
0.03
2
79
0.00
2
95
0.00
2
103
0.16
0.16
1
159 0.00
1
191
0.00
1
207
0.16
77
0.16
1
79
0.00
1
95
0.00
1
103
0.16
0
155
0.16
0
159 0.00
0
191
0.00
0
207
0.16
0
77
0.16
0
79
0.00
0
95
0.00
0
103
0.16
4800
0
38
0.16
0
39
0.00
0
47
0.00
0
51
0.16
9600
0
19
–2.34
0
19
0.00
0
23
0.00
0
25
0.16
19200
0
9
–2.34
0
9
0.00
0
11
0.00
0
12
0.16
31250
0
5
0.00
0
5
2.40
—
—
—
0
7
0.00
38400
0
4
–2.34
0
4
0.00
0
5
0.00
—
—
—
Bit Rate
1
N
(bps)*
N
Error
(%)
n
N
110
2
106
–0.44
2
150
2
77
0.16
300
1
155
600
1
1200
2400
Error
(%)
Rev. 5.00 Aug 08, 2006 page 573 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Operating Frequency φ (MHz)
9.8304
*3
10
12
12.288
Bit Rate
1
(bps)* n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
2
174
–0.26
2
177
–0.25
2
212
0.03
2
217
0.08
150
2
127
0.00
2
129
0.16
2
155
0.16
2
159
0.00
300
1
255
0.00
2
64
0.16
2
77
0.16
2
79
0.00
600
1
127
0.00
1
129
0.16
1
155
0.16
1
159
0.00
1200
0
255
0.00
1
64
0.16
1
77
0.16
1
79
0.00
2400
0
127
0.00
0
129
0.16
0
155
0.16
0
159
0.00
4800
0
63
0.00
0
64
0.16
0
77
0.16
0
79
0.00
9600
0
31
0.00
0
32
–1.36
0
38
0.16
0
39
0.00
19200
0
15
0.00
0
15
1.73
0
19
–2.34
0
19
0.00
31250
0
9
–1.70
0
9
0.00
0
11
0.00
0
11
2.40
38400
0
7
0.00
0
7
1.73
0
9
–2.34
0
9
0.00
Operating Frequency φ (MHz)
14
*2
14.7456*
16*
2
17.2032*
2
2
Bit Rate
1
(bps)* n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
2
248
–0.17
3
64
0.70
3
70
0.03
3
75
0.48
150
2
181
0.16
2
191
0.00
2
207
0.16
2
223
0.00
300
2
90
0.16
2
95
0.00
2
103
0.16
2
111
0.00
600
1
181
0.16
1
191
0.00
1
207
0.16
1
223
0.00
1200
1
90
0.16
1
95
0.00
1
103
0.16
1
111
0.00
2400
0
181
0.16
0
191
0.00
0
207
0.16
0
223
0.00
4800
0
90
0.16
0
95
0.00
0
103
0.16
0
111
0.00
9600
0
45
–0.93
0
47
0.00
0
51
0.16
0
55
0.00
19200
0
22
–0.93
0
23
0.00
0
25
0.16
0
27
0.00
31250
0
13
0.00
0
14
–1.70
0
15
0.00
0
16
1.20
38400
—
—
—
0
11
0.00
0
12
0.16
0
13
0.00
Rev. 5.00 Aug 08, 2006 page 574 of 982
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Section 15 Serial Communication Interface (SCI)
Operating Frequency φ (MHz)
18
*2
19.6608*
20*
2
2
Bit Rate
1
(bps)* n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
3
79
–0.12
3
86
0.31
3
88
–0.25
150
2
233
0.16
2
255
0.00
3
64
0.16
300
2
116
0.16
2
127
0.00
2
129
0.16
600
1
233
0.16
1
255
0.00
2
64
0.16
1200
1
116
0.16
1
127
0.00
1
129
0.16
2400
0
233
0.16
0
255
0.00
1
64
0.16
4800
0
116
0.16
0
127
0.00
0
129
0.16
9600
0
58
–0.69
0
63
0.00
0
64
0.16
19200
0
28
1.02
0
31
0.00
0
32
–1.36
31250
0
17
0.00
0
19
–1.70
0
19
0.00
38400
0
14
–2.34
0
15
0.00
0
15
1.73
Notes: 1. Example when the SEMR0 register ABCS bit is 0. The bit rate is doubled when ABCS is
set to 1.
2. Supported only by the H8S/2239 Group.
3. The H8S/2258 Group is out of operation.
Rev. 5.00 Aug 08, 2006 page 575 of 982
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Section 15 Serial Communication Interface (SCI)
Table 15.4 Maximum Bit Rate for Each Frequency (Asynchronous Mode)
φ (MHz)
2
2*
Maximum Bit
Rate (kbps)
n
N
φ (MHz)
Maximum Bit
Rate (kbps)
n
N
307.2
0
0
0
0
2
9.8304*
2
2.097152* 65.536
2
2.4576*
76.8
0
0
10
312.5
0
0
0
0
12
375.0
0
0
2
3*
93.75
0
0
0
0
115.2
0
0
12.288
1
14*
384.0
2
3.6864*
437.5
0
0
4*
125.0
0
0
14.7456*
460.8
0
0
500.0
0
0
537.6
0
0
62.5
2
4.9152
2
5*
6
*2
*2
2
6.144*
153.6
0
0
1
16
*1
*1
156.25
0
0
187.5
0
0
17.2032
1
18*
562.5
0
0
0
1
19.6608*
614.4
0
0
1
20*
625.0
0
0
192.0
0
2
7.3728*
230.4
0
0
2
8*
250.0
0
0
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Rev. 5.00 Aug 08, 2006 page 576 of 982
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Section 15 Serial Communication Interface (SCI)
Table 15.5 Maximum Bit Rate with External Clock Input (Asynchronous Mode)
External Input
Clock (MHz)
Maximum Bit
Rate (kbps)
9.8304*
2.4576
153.6
32.768
10
2.5000
156.25
38.4
12
3.0000
187.5
0.7500
46.875
3.0720
192.0
0.9216
57.6
12.288
1
14*
3.5000
218.75
1.0000
62.5
14.7456*
3.6864
230.4
4.0000
250.0
4.3008
268.8
4.5000
1
*
19.6608
4.9152
1
*
20
5.0000
281.3
φ (MHz)
External Input
Clock (MHz)
Maximum Bit
Rate (kbps)
φ (MHz)
2*
0.5000
31.25
2
2.097152* 0.5243
2
2.4576*
0.6144
2
3*
2
3.6864*
4*
2
2
4.9152
2
5*
6
*2
*2
1.2288
76.8
1.2500
78.125
1.5000
93.75
2
6.144*
1.5360
96.0
2
7.3728*
1.8432
115.2
2
8*
2.0000
125.0
2
1
16
*1
17.2032
1
18*
*1
307.2
312.5
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Rev. 5.00 Aug 08, 2006 page 577 of 982
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Section 15 Serial Communication Interface (SCI)
Table 15.6 BRR Settings for Various Bit Rates (Clocked Synchronous Mode)
Operating Frequency φ (MHz)
2
*2
4*
6*
2
Bit Rate
(bps)
n
N
n
N
110
3
70
—
—
250
2
124
2
500
1
249
1k
1
2.5 k
8*
2
n
N
249
3
124
2
124
2
249
124
1
249
2
124
0
199
1
99
1
149
1
199
5k
0
99
0
199
1
74
1
99
10 k
0
49
0
99
0
149
0
199
25 k
0
19
0
39
0
59
0
79
50 k
0
9
0
19
0
29
0
39
100 k
0
4
0
9
0
14
0
19
250 k
0
1
0
3
0
5
0
7
0
0*
0
1
0
2
0
3
0
0*
0
1
500 k
1M
2.5 M
5M
Rev. 5.00 Aug 08, 2006 page 578 of 982
REJ09B0054-0500
n
N
2
Section 15 Serial Communication Interface (SCI)
Operating Frequency φ (MHz)
Bit Rate
(bps)
16*
20*
1
10
n
N
n
N
250
—
—
3
249
500
—
—
3
1k
—
—
2
1
n
N
124
—
—
249
—
—
110
2.5 k
1
249
2
99
2
124
5k
1
124
1
199
1
249
10 k
0
249
1
99
1
124
25 k
0
99
0
159
0
199
50 k
0
49
0
79
0
99
100 k
0
24
0
39
0
49
250 k
0
9
0
15
0
19
500 k
0
4
0
7
0
9
0
3
0
4
0
0*
0
1
0
0*
1M
2.5 M
5M
Legend:
Blank: Cannot be set.
—:
Can be set, but there will be a degree of error.
*:
Continuous transfer is not possible.
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Table 15.7 Maximum Bit Rate with External Clock Input (Clocked Synchronous Mode)
External Input Maximum Bit Rate
φ (MHz) Clock (MHz)
(bps)
2*
2
4*
2
6
*2
8
*2
10
φ (MHz)
External Input Maximum Bit Rate
Clock (MHz)
(bps)
0.3333
0.333
12
0.6667
0.667
14*
1.0000
1.3333
1.6667
1.000
1.333
1.667
2.0000
2.000
1
2.3333
2.333
16
*1
2.6667
3.667
18
*1
3.0000
3.000
20
*1
3.3333
3.333
Notes 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Rev. 5.00 Aug 08, 2006 page 579 of 982
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Section 15 Serial Communication Interface (SCI)
Table 15.8 Examples of Bit Rate for Various BRR Settings (Smart Card Interface Mode)
(When n = 0 and S = 372)
Operating Frequency φ (MHz)
2
5.00*
Bit Rate
(bps)
N
Error (%)
6720
0
0.01
9600
0
30.00
2
7.00*
N
7.1424*
2
10.00
10.7136
Error (%)
N
Error (%)
N
Error (%)
N
Error (%)
1
30.00
1
28.57
1
0.01
1
7.14
0
1.99
0
0.00
1
30.00
1
25.00
Operating Frequency φ (MHz)
14.2848*
16.00*
1
13.00
18.00*
1
20.00*
1
1
Bit Rate
(bps)
N
Error (%)
N
Error (%)
N
Error (%)
N
Error (%)
N
Error (%)
6720
2
13.33
2
4.76
2
6.67
3
9.99
3
0.01
9600
1
8.99
1
0.00
1
12.01
2
15.99
2
6.66
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Table 15.9 Maximum Bit Rate at Various Frequencies (Smart Card Interface Mode)
(When S = 372)
φ (MHz)
Maximum Bit Rate (bps)
n
N
2
5.00*
6720
0
0
2
7.00*
9409
0
0
2
7.1424*
9600
0
0
10.00
13441
0
0
10.7136
14400
0
0
17473
1
*
14.2848 19200
1
16.00*
21505
0
0
0
0
0
0
1
18.00*
24194
0
0
1
20.00*
26882
0
0
13.00
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Rev. 5.00 Aug 08, 2006 page 580 of 982
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Section 15 Serial Communication Interface (SCI)
15.3.10
Serial Expansion Mode Register (SEMR_0)
SEMR_0 is an 8-bit register that expands SCI_0 functions; such as setting of the base clock,
selecting of the clock source, and automatic setting of the transfer rate.
Note: Supported only by the H8S/2239 Group only.
Bit
Bit Name
Initial
Value
R/W
Description
7
SSE
0
R/W
SCI_0 Select Enable
This bit enables or disables the SCI_0 select
function when an external clock is input in clocked
synchronous mode. When 1 is set to the
PG1/IRQ7 pin, while the SCI_0 select function is
enabled, the TxD0 output becomes Hi-Z and the
SCK0 input in this LSI is fixed high making the
SCI_0 data transfer terminated. The SSE setting is
valid when the external clock input is selected
(CKE in SCR = 0) in clocked synchronous mode
(C/A in SMR = 1).
0: SCI_0 select is disabled.
1: SCI_0 select is enabled.
When then PG1/IRQ7 pin = 1, the TxD0 output
becomes Hi-Z and the SCK0 clock input is fixed
high.
6 to 4
—
Undefined
—
Reserved
These bits are always read as 0, and cannot be
modified.
3
ABCS
0
R/W
Asynchronous Base Clock Select
Selects the 1-bit-interval base clock in
asynchronous mode.
The ABCS setting is valid in asynchronous mode
(C/A in SMR = 0).
0: Operates on a base clock with a frequency of 16
times the transfer rate.
1: Operates on a base clock with a frequency of 8
times the transfer rate.
Rev. 5.00 Aug 08, 2006 page 581 of 982
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Section 15 Serial Communication Interface (SCI)
Bit
Bit Name
Initial
Value
R/W
Description
2
ACS2
0
R/W
Asynchronous Clock Source Select
1
ACS1
0
R/W
0
ACS0
0
R/W
When an average transfer rate is selected, the
base clock is set automatically regardless of the
ABCS value. Note that average transfer rates are
not supported for operating frequencies other than
10.667 MHz and 16 MHz.
The ACS0 to ACS0 settings are valid when the
external clock input is selected (CKE in SCR = 0)
in asynchronous mode (C/A in SMR = 0).
000: External clock input
001: Selects the average transfer rate 115.152
kbps only for φ = 10.667 MHz (operates on a
base clock with a frequency of 16 times the
transfer rate).
010: Selects the average transfer rate 460.606
kbps only for φ = 10.667 MHz (operates on a
base clock with a frequency of 8 times the
transfer rate).
011: Reserved
100: TPU clock input (logical AND of TIOCA1 and
TIOCA2)
101: Selects the average transfer rate 115.196
kbps only for φ = 16 MHz (operates on a
base clock with a frequency of 16 times the
transfer rate).
110: Selects the average transfer rate 460.784
kbps only for φ = 16 MHz (operates on a
base clock with a frequency of 16 times the
transfer rate).
111: Selects the average transfer rate 720 kbps
only for φ = 16 MHz (operates on a base
clock with a frequency of 8 times the transfer
rate).
Figures 15.3 and 15.4 show an example of the internal base clock when the average transfer rate is
selected.
Rev. 5.00 Aug 08, 2006 page 582 of 982
REJ09B0054-0500
1
1
2
2
1
1
2
2
5
6
8
7
3
3
9
10 11 12
13 14
5
6
7
8
15 16
7
Average error = −0.043%
Average transfer rate = 3.6848 MHz/8 = 460.606 kbps
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 1
1 bit = Base clock x 8*
3.6848 MHz
4 5
6
5.333 MHz
4
Average error = −0.043%
Average transfer rate = 1.8424 MHz/16 = 115.152 kbps
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 1
1 bit = Base clock x 16*
1.8424 MHz
4 5
6
7
Note: * The 1-bit length changes according to the base clock synchronization.
3.6848 MHz (Average)
5.333 MHz x (38/55) =
5.333 MHz
10.667 MHz/2 =
Base clock
4
2.667 MHz
3
3
Average transfer rate is 460.606 kbps
1.8424 MHz (Average)
2.667 MHz x (38/55) =
2.667 MHz
10.667 MHz/4 =
Base clock
Average transfer rate is 115.152 kbps
φ = 10.667
2
2
3 4
3 4
Section 15 Serial Communication Interface (SCI)
Figure 15.3 Example of the Internal Base Clock
When the Average Transfer Rate Is Selected (1)
Rev. 5.00 Aug 08, 2006 page 583 of 982
REJ09B0054-0500
φ = 16 MHz
1
1
3
3
4
5
4
Rev. 5.00 Aug 08, 2006 page 584 of 982
REJ09B0054-0500
1
1
Figure 15.4 Example of the Internal Base Clock
When the Average Transfer Rate Is Selected (2)
1
1
8
1 bit = Base clock x 16*
9 10 11 12
13 14 15 16
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 1
3
3
4
5
4
6
7
8
9 10 11 12
13 14 15 16
7
5.76 MHz
4 5
6
6
8
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1
1 bit = Base clock x 16*
3
5
8 MHz
Average error with 720 kbps = −0%
Average transfer rate = 5.76 MHz/8 = 720 kbps
2
3
4
Average error with 460.8 kbps = −0.004%
2
2
3 4
5
6
7 8
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
1 bit = Base clock x 16*
7.3725 MHz
5 6 7 8
8 MHz
Average transfer rate = 7.3725 MHz/16 = 460.784 kbps
2
2
Note: * The 1-bit length changes according to the base clock synchronization.
5.76 MHz (Average)
8 MHz x (18/5) =
16 MHz/2 = 8 MHz
Base clock
7
Average error with 115.2 kbps = −0.004%
Average transfer rate when f = 720 kbps
7.3725 MHz (Average)
8 MHz x (47/51) =
16 MHz/2 = 8 MHz
Base clock
6
1.8431 MHz
5 6 7 8
2 MHz
Average transfer rate = 1.8431 MHz/16 = 115.196 kbps
2
2
Average transfer rate when f = 460.784 kbps
1.8431 MHz (Average)
2 MHz x (47/51) =
16 MHz/8 = 2 MHz
Base clock
Average transfer rate when f = 115.196 kbps
Section 15 Serial Communication Interface (SCI)
Section 15 Serial Communication Interface (SCI)
15.4
Operation in Asynchronous Mode
Figure 15.5 shows the general format for asynchronous serial communication. One frame consists
of a start bit (low level), followed by data, a parity bit, and finally stop bits (high level). In
asynchronous serial communication, the transmission line is usually held in the mark state (high
level). The SCI monitors the transmission line, and when it goes to the space state (low level),
recognizes a start bit and starts serial communication. Inside the SCI, the transmitter and receiver
are independent units, enabling full-duplex communication. Both the transmitter and the receiver
also have a double-buffered structure, so that data can be read or written during transmission or
reception, enabling continuous data transfer. In asynchronous mode, the SCI performs
synchronization at the falling edge of the start bit in reception. The SCI samples the data on the
8th pulse of a clock with a frequency of 16 times the length of one bit, so that the transfer data is
latched at the center of each bit.
The SCI_0 samples the data on the 4th pulse of a clock with a frequency of 8 times the length of
one bit when the ABCS bit in SEMR_0 is 1 (H8S/2239 Group only).
1
Serial
data
LSB
D0
0
Idle state
(mark state)
1
MSB
D1
D2
D3
D4
D5
Start
bit
Transmit/receive data
1 bit
7 or 8 bits
D6
D7
0/1
Parity
bit
1 bit,
or none
1
1
Stop bit
1 or
2 bits
One unit of transfer data (character or frame)
Figure 15.5 Data Format in Asynchronous Communication
(Example with 8-Bit Data, Parity, Two Stop Bits)
15.4.1
Data Transfer Format
Table 15.10 shows the data transfer formats that can be used in asynchronous mode. Any of 12
transfer formats can be selected according to the SMR setting. For details on the multiprocessor
bit, refer to section 15.5, Multiprocessor Communication Function.
Rev. 5.00 Aug 08, 2006 page 585 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Table 15.10 Serial Transfer Formats (Asynchronous Mode)
SMR Settings
Serial Transfer Format and Frame Length
CHR
PE
MP
STOP
1
0
0
0
0
S
8-bit data
STOP
0
0
0
1
S
8-bit data
STOP STOP
0
1
0
0
S
8-bit data
P STOP
0
1
0
1
S
8-bit data
P STOP STOP
1
0
0
0
S
7-bit data
STOP
1
0
0
1
S
7-bit data
STOP STOP
1
1
0
0
S
7-bit data
P
STOP
1
1
0
1
S
7-bit data
P
STOP STOP
0
—
1
0
S
8-bit data
MPB STOP
0
—
1
1
S
8-bit data
MPB STOP STOP
1
—
1
0
S
7-bit data
MPB STOP
1
—
1
1
S
7-bit data
MPB STOP STOP
Legend:
S:
Start bit
STOP: Stop bit
P:
Parity bit
MPB: Multiprocessor bit
Rev. 5.00 Aug 08, 2006 page 586 of 982
REJ09B0054-0500
2
3
4
5
6
7
8
9
10
11
12
Section 15 Serial Communication Interface (SCI)
15.4.2
Receive Data Sampling Timing and Reception Margin in Asynchronous Mode
In asynchronous mode, the SCI operates on a base clock with a frequency of 16 times the transfer
rate. In reception, the SCI samples the falling edge of the start bit using the base clock, and
performs internal synchronization. Receive data is latched internally at the rising edge of the 8th
pulse of the base clock as shown in figure 15.6. Thus, the reception margin in asynchronous mode
is given by formula (1) below.
M = (0.5 −
1
) − (L − 0.5) F −
2N
D − 0.5
N
(1 + F)
× 100 [%]
... Formula (1)
Where M: Reception margin (%)
N: Bit rate ratio relative to clock (N = 16, but in the H8S/2239 Group N = 8 if ABCS in
SEMR_0 is set to 1.)
D: Clock duty (D = 0 to 1.0)
L: Frame length (L = 9 to 12)
F: Clock frequency deviation absolute value
Assuming values of F (absolute value of clock rate deviation) = 0, D (clock duty) = 0.5, and N
(ratio of bit rate to clock) = 16 in formula (1), the reception margin can be given by the formula.
M = {0.5 – 1/(2 × 16)} × 100 [%] = 46.875%
However, this is only the computed value, and a margin of 20% to 30% should be allowed for in
system design.
Note: Example for H8S/2239 Group with the ABCS bit in SEMR_0 set to a value other than 1.
When ABCS is set to 1, the clock frequency is 8 times the bit rate and sampling of
received data takes place at the fourth rising edge of the basic clock.
Rev. 5.00 Aug 08, 2006 page 587 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
16 clocks
8 clocks
0
7
15 0
7
15 0
Internal basic
clock
Receive data
(RxD)
Start bit
D0
D1
Synchronization
sampling timing
Data sampling
timing
Note: Example for H8S/2239 Group with the ABCS bit in SEMR_0 set to a value other than 1.
When ABCS is set to 1, the clock frequency is 8 times the bit rate and sampling of received
data takes place at the fourth rising edge of the basic clock.
Figure 15.6 Receive Data Sampling Timing in Asynchronous Mode
15.4.3
Clock
Either an internal clock generated by the on-chip baud rate generator or an external clock input at
the SCK pin can be selected as the SCI’s serial clock, according to the setting of the C/A bit in
SMR and the CKE0 and CKE1 bits in SCR. When an external clock is input at the SCK pin, the
clock frequency should be 16 times the bit rate used.
When the SCI is operated on an internal clock, the clock can be output from the SCK pin when
setting CKE1 = 0 and CKE0 = 1. The frequency of the clock output in this case is equal to the bit
rate, and the phase is such that the rising edge of the clock is in the middle of the transmit data, as
shown in figure 15.7.
SCK
TxD
0
D0
D1
D2
D3
D4
D5
D6
D7
0/1
1
1
1 frame
Figure 15.7 Relationship between Output Clock and Transfer Data Phase
(Asynchronous Mode)
Rev. 5.00 Aug 08, 2006 page 588 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
15.4.4
SCI Initialization (Asynchronous Mode)
Before transmitting and receiving data, you should first clear the TE and RE bits in SCR to 0, then
initialize the SCI as described in figure 15.8. When the operating mode, or transfer format, is
changed for example, the TE and RE bits must be cleared to 0 before making the change using the
following procedure. When the TE bit is cleared to 0, the TDRE flag is set to 1. Note that clearing
the RE bit to 0 does not initialize the contents of the RDRF, PER, FER, and ORER flags, or the
contents of RDR. When the external clock is used in asynchronous mode, the clock must be
supplied even during initialization.
Start initialization
[1] Set the clock selection in SCR.
Be sure to clear bits RIE, TIE,
TEIE, MPIE, TE, and RE, to 0.
Clear TE and RE bits in SCR to 0
Set CKE1 and CKE0 bits in SCR
(TE, RE bits 0)
[1]
Set data transfer format in
SMR and SCMR
[2]
Set value in BRR
[3]
[2] Set the data transfer format in SMR
and SCMR.
Wait
No
1-bit interval elapsed?
[3] Write a value corresponding to the
bit rate to BRR. Not necessary if
an external clock or an average
transfer rate clock by bits ACS2 to
ACS0 in SEMR_0*2 is used.
[4] Wait at least one bit interval, then
set the TE bit or RE bit in SCR to 1.
Also set the RIE, TIE, TEIE, and
MPIE bits.
Setting the TE and RE bits enables
the TxD and RxD pins to be used.
Yes
Set TE and RE*1 bits in
SCR to 1, and set RIE, TIE, TEIE,
and MPIE bits
When the clock is selected in
asynchronous mode, it is output
immediately after SCR settings are
made.
[4]
<Initialization completion>
Notes: 1. Perform this set operation with the RxD pin in the 1 state. If the RE bit is set to 1 with the RxD pin
in the 0 state, it may be misinterpreted as a start bit.
2. Supported only by the H8S/2239 Group.
Figure 15.8 Sample SCI Initialization Flowchart
Rev. 5.00 Aug 08, 2006 page 589 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
15.4.5
Serial Data Transmission (Asynchronous Mode)
Figure 15.9 shows an example of operation for transmission in asynchronous mode. In
transmission, the SCI operates as described below.
1. The SCI monitors the TDRE flag in SSR. If the flag is cleared to 0, the SCI recognizes that
data has been written to TDR, and transfers the data from TDR to TSR.
2. After transferring data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts
transmission. If the TIE bit is set to 1 at this time, a transmit data empty interrupt request (TXI)
is generated. Continuous transmission is possible because the TXI interrupt routine writes next
transmit data to TDR before transmission of the current transmit data has been completed.
3. Data is sent from the TxD pin in the following order: start bit, transmit data, parity bit or
multiprocessor bit (may be omitted depending on the format), and stop bit.
4. The SCI checks the TDRE flag at the timing for sending the stop bit.
5. If the TDRE flag is 0, the data is transferred from TDR to TSR, the stop bit is sent, and then
serial transmission of the next frame is started.
6. If the TDRE flag is 1, the TEND flag in SSR is set to 1, the stop bit is sent, and then the “mark
state” is entered, in which 1 is output. If the TEIE bit in SCR is set to 1 at this time, a TEI
interrupt request is generated.
1
Start
bit
0
Data
D0
D1
Parity Stop Start
bit
bit
bit
D7
0/1
1
0
Data
D0
D1
Parity Stop
bit
bit
D7
0/1
1
1
Idle state
(mark state)
TDRE
TEND
TXI interrupt
Data written to TDR and
TXI interrupt
request generated TDRE flag cleared to 0 in
request generated
TXI interrupt service routine
TEI interrupt
request generated
1 frame
Figure 15.9 Example of Operation in Transmission in Asynchronous Mode
(Example with 8-Bit Data, Parity, One Stop Bit)
Rev. 5.00 Aug 08, 2006 page 590 of 982
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Section 15 Serial Communication Interface (SCI)
Figure 15.10 shows a sample flowchart for data transmission.
Initialization
[1]
Start transmission
Read TDRE flag in SSR
[2]
[2] SCI status check and transmit data
write:
Read SSR and check that the
TDRE flag is set to 1, then write
transmit data to TDR and clear the
TDRE flag to 0.
No
TDRE = 1
Yes
Write transmit data to TDR
and clear TDRE flag in SSR to 0
No
All data transmitted?
Yes
[3]
Read TEND flag in SSR
TEND = 1
Yes
No
Yes
Clear DR to 0 and
set DDR to 1
Clear TE bit in SCR to 0
[3] Serial transmission continuation
procedure:
To continue serial transmission,
read 1 from the TDRE flag to
confirm that writing is possible,
then write data to TDR, and then
clear the TDRE flag to 0. Checking
and clearing of the TDRE flag is
automatic when the DMAC*1 or
the DTC*2 is activated by a
transmit-data-empty interrupt (TXI)
request, and data is written to TDR.
[4] Break output at the end of serial
transmission:
To output a break in serial
transmission, set DR for the port
corresponding to the TxD pin to 0,
clear DDR to 1, then clear the TE
bit in SCR to 0.
No
Break output?
[1] SCI initialization:
The TxD pin is automatically
designated as the transmit data
output pin.
After the TE bit is set to 1, a frame
of 1s is output, and transmission is
enabled.
[4]
Notes: 1. Supported only by the H8S/2239
Group.
2. The case, in which the DTC
automatically checks and clears
the TDRE flag, occurs only when
DISEL in DTC is 0 with the
transfer counter not being 0.
Therefore, the TDRE flag should
be cleared by CPU when DISEL
is 1, or when DISEL is 0 with the
transfer counter being 0.
<End>
Figure 15.10 Sample Serial Transmission Flowchart
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Section 15 Serial Communication Interface (SCI)
15.4.6
Serial Data Reception (Asynchronous Mode)
Figure 15.11 shows an example of operation for reception in asynchronous mode. In serial
reception, the SCI operates as described below.
1. The SCI monitors the communication line. If a start bit is detected, the SCI performs internal
synchronization, receives receive data in RSR, and checks the parity bit and stop bit.
2. If an overrun error occurs (when reception of the next data is completed while the RDRF flag
is still set to 1), the ORER bit in SSR is set to 1. If the RIE bit in SCR is set to 1 at this time, an
ERI interrupt request is generated. Receive data is not transferred to RDR. The RDRF flag
remains to be set to 1.
3. If a parity error is detected, the PER bit in SSR is set to 1 and receive data is transferred to
RDR. If the RIE bit in SCR is set to 1 at this time, an ERI interrupt request is generated.
4. If a framing error is detected (when the stop bit is 0), the FER bit in SSR is set to 1 and receive
data is transferred to RDR. If the RIE bit in SCR is set to 1 at this time, an ERI interrupt
request is generated.
5. If reception is completed successfully, the RDRF bit in SSR is set to 1, and receive data is
transferred to RDR. If the RIE bit in SCR is set to 1 at this time, an RXI interrupt request is
generated. Continuous reception is possible because the RXI interrupt routine reads the receive
data transferred to RDR before reception of the next receive data has been completed.
1
Start
bit
0
Data
D0
D1
Parity Stop Start
bit
bit
bit
D7
0/1
1
0
Data
D0
D1
Parity Stop
bit
bit
D7
0/1
0
1
Idle state
(mark state)
RDRF
FER
RXI interrupt
request
generated
RDR data read and RDRF
flag cleared to 0 in RXI
interrupt service routine
ERI interrupt request
generated by framing
error
1 frame
Figure 15.11 Example of SCI Operation in Reception
(Example with 8-Bit Data, Parity, One Stop Bit)
Rev. 5.00 Aug 08, 2006 page 592 of 982
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Section 15 Serial Communication Interface (SCI)
Table 15.11 shows the states of the SSR status flags and receive data handling when a receive
error is detected. If a receive error is detected, the RDRF flag retains its state before receiving
data. Reception cannot be resumed while a receive error flag is set to 1. Accordingly, clear the
ORER, FER, PER, and RDRF bits to 0 before resuming reception. Figure 15.12 shows a sample
flow chart for serial data reception.
Table 15.11 SSR Status Flags and Receive Data Handling
SSR Status Flag
RDRF*
ORER
FER
PER
Receive Data
Receive Error Type
1
1
0
0
Lost
Overrun error
0
0
1
0
Transferred to RDR
Framing error
0
0
0
1
Transferred to RDR
Parity error
1
1
1
0
Lost
Overrun error + framing error
1
1
0
1
Lost
Overrun error + parity error
0
0
1
1
Transferred to RDR
Framing error + parity error
1
1
1
1
Lost
Overrun error + framing error +
parity error
Note:
*
The RDRF flag retains the state it had before data reception.
Rev. 5.00 Aug 08, 2006 page 593 of 982
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Section 15 Serial Communication Interface (SCI)
Initialization
[1]
Start reception
[1] SCI initialization:
The RxD pin is automatically
designated as the receive data input
pin.
[2] [3] Receive error processing and break
detection:
[2]
If a receive error occurs, read the
ORER, PER, and FER flags in SSR to
identify the error. After performing the
appropriate error processing, ensure
Yes
that the ORER, PER, and FER flags are
PER ∨ FER ∨ ORER = 1
all cleared to 0. Reception cannot be
[3]
resumed if any of these flags are set to
No
Error processing
1. In the case of a framing error, a
break can be detected by reading the
(Continued on next page)
value of the input port corresponding to
the RxD pin.
[4]
Read RDRF flag in SSR
[4] SCI status check and receive data read:
Read SSR and check that RDRF = 1,
then read the receive data in RDR and
RDRF = 1
clear the RDRF flag to 0. Transition of
the RDRF flag from 0 to 1 can also be
identified by an RXI interrupt.
Yes
Read ORER, PER, and
FER flags in SSR
No
Read receive data in RDR, and
clear RDRF flag in SSR to 0
No
All data received?
Yes
Clear RE bit in SCR to 0
<End>
[5]
[5] Serial reception continuation procedure:
To continue serial reception, before the
stop bit for the current frame is
received, read the RDRF flag, read
RDR, and clear the RDRF flag to 0.
The RDRF flag is cleared automatically
when the DMAC*1 or the DTC*2 is
activated by an RXI interrupt and the
RDR value is read.
Notes: 1. Supported only by the H8S/2239
Group.
2. The case, in which the DTC
automatically clears the RDRF
flag, occurs only when DISEL in
DTC is 0 with the transfer counter
not being 0. Therefore, the RDRF
flag should be cleared by CPU
when DISEL is 1, or when DISEL
is 0 with the transfer counter
being 0.
Figure 15.12 Sample Serial Reception Data Flowchart (1)
Rev. 5.00 Aug 08, 2006 page 594 of 982
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Section 15 Serial Communication Interface (SCI)
[3]
Error processing
No
ORER = 1
Yes
Overrun error processing
No
FER = 1
Yes
Yes
Break?
No
Framing error processing
Clear RE bit in SCR to 0
No
PER = 1
Yes
Parity error processing
Clear ORER, PER, and
FER flags in SSR to 0
<End>
Figure 15.12 Sample Serial Reception Data Flowchart (2)
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Section 15 Serial Communication Interface (SCI)
15.5
Multiprocessor Communication Function
Use of the multiprocessor communication function enables data transfer between a number of
processors sharing communication lines by asynchronous serial communication using the
multiprocessor format, in which a multiprocessor bit is added to the transfer data. When
multiprocessor communication is performed, each receiving station is addressed by a unique ID
code. The serial communication cycle consists of two component cycles; an ID transmission cycle
that specifies the receiving station, and a data transmission cycle. The multiprocessor bit is used to
differentiate between the ID transmission cycle and the data transmission cycle. If the
multiprocessor bit is 1, the cycle is an ID transmission cycle; if the multiprocessor bit is 0, the
cycle is a data transmission cycle. Figure 15.13 shows an example of inter-processor
communication using the multiprocessor format. The transmitting station first sends the ID code of
the receiving station with which it wants to perform serial communication as data with a 1
multiprocessor bit added. It then sends transmit data as data with a 0 multiprocessor bit added.
When data with a 1 multiprocessor bit is received, the receiving station compares that data with its
own ID. The station whose ID matches then receives the data sent next. Stations whose IDs do not
match continue to skip data until data with a 1 multiprocessor bit is again received.
The SCI uses the MPIE bit in SCR to implement this function. When the MPIE bit is set to 1,
transfer of receive data from RSR to RDR, error flag detection, and setting the SSR status flags,
RDRF, FER, and ORER to 1, are inhibited until data with a 1 multiprocessor bit is received. On
reception of a receive character with a 1 multiprocessor bit, the MPB bit in SSR is set to 1 and the
MPIE bit is automatically cleared, thus normal reception is resumed. If the RIE bit in SCR is set to
1 at this time, an RXI interrupt is generated.
When the multiprocessor format is selected, the parity bit setting is rendered invalid. All other bit
settings are the same as those in normal asynchronous mode. The clock used for multiprocessor
communication is the same as that in normal asynchronous mode.
Rev. 5.00 Aug 08, 2006 page 596 of 982
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Section 15 Serial Communication Interface (SCI)
Transmitting
station
Serial transmission line
Receiving
station A
Receiving
station B
Receiving
station C
Receiving
station D
(ID = 01)
(ID = 02)
(ID = 03)
(ID = 04)
Serial
data
H'01
H'AA
(MPB = 1)
(MPB = 0)
ID transmission cycle = Data transmission cycle =
receiving station
Data transmission to
specification
receiving station specified by ID
Legend:
MPB: Multiprocessor bit
Figure 15.13 Example of Communication Using Multiprocessor Format
(Transmission of Data H'AA to Receiving Station A)
15.5.1
Multiprocessor Serial Data Transmission
Figure 15.14 shows a sample flowchart for multiprocessor serial data transmission. For an ID
transmission cycle, set the MPBT bit in SSR to 1 before transmission. For a data transmission
cycle, clear the MPBT bit in SSR to 0 before transmission. All other SCI operations are the same
as those in asynchronous mode.
Rev. 5.00 Aug 08, 2006 page 597 of 982
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Section 15 Serial Communication Interface (SCI)
Initialization
[1]
Start transmission
Read TDRE flag in SSR
[2]
[2] SCI status check and transmit
data write:
Read SSR and check that the
TDRE flag is set to 1, then write
transmit data to TDR. Set the
MPBT bit in SSR to 0 or 1.
Finally, clear the TDRE flag to 0.
No
TDRE = 1
Yes
Write transmit data to TDR and
set MPBT bit in SSR
Clear TDRE flag to 0
No
All data transmitted?
[1] SCI initialization:
The TxD pin is automatically
designated as the transmit data
output pin.
After the TE bit is set to 1, a
frame of 1s is output, and
transmission is enabled.
[3]
Yes
Read TEND flag in SSR
[3] Serial transmission continuation
procedure:
To continue serial transmission,
be sure to read 1 from the TDRE
flag to confirm that writing is
possible, then write data to TDR,
and then clear the TDRE flag to
0. Checking and clearing of the
TDRE flag is automatic when the
DMAC*1 or the DTC*2 is
activated by a transmit-dataempty interrupt (TXI) request,
and data is written to TDR.
[4] Break output at the end of serial
transmission:
To output a break in serial
transmission, set the port DR to
0, clear DDR to 1, then clear the
TE bit in SCR to 0.
No
TEND = 1
Yes
No
Break output?
Yes
Clear DR to 0 and set DDR to 1
Clear TE bit in SCR to 0
[4]
Notes: 1. Supported only by the H8S/2239
Group.
2. The case, in which the DTC
automatically clears the TDRE
flag, occurs only when DISEL in
DTC is 0 with the transfer
counter not being 0. Therefore,
the TDRE flag should be cleared
by CPU when DISEL is 1, or
when DISEL is 0 with the
transfer counter being 0.
<End>
Figure 15.14 Sample Multiprocessor Serial Transmission Flowchart
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Section 15 Serial Communication Interface (SCI)
15.5.2
Multiprocessor Serial Data Reception
Figure 15.16 shows a sample flowchart for multiprocessor serial data reception. If the MPIE bit in
SCR is set to 1, data is skipped until data with a 1 multiprocessor bit is sent. On receiving data
with a 1 multiprocessor bit, the receive data is transferred to RDR. An RXI interrupt request is
generated at this time. All other SCI operations are the same as in asynchronous mode. Figure
15.15 shows an example of SCI operation for multiprocessor format reception.
1
Start
bit
0
Multiprocessor
bit
Data (ID1)
D0
D1
D7
1
Stop Start
bit
bit
1
0
Data (Data1)
D0
D1
Multiprocessor
bit
D7
0
Stop
bit
1
1 Mark state
(idle state)
MPIE
RDRF
RDR
value
ID1
MPIE = 0
RXI interrupt
request
(multiprocessor
interrupt)
generated
If not this station’s ID,
MPIE bit is set to 1
again
RDR data read
and RDRF flag
cleared to 0 in
RXI interrupt
service routine
RXI interrupt request is
not generated, and RDR
retains its state
(a) Data does not match station's ID
1
Start
bit
0
Multiprocessor
bit
Data (ID2)
D0
D1
D7
1
Stop Start
bit
bit
1
0
Data (Data2)
D0
D1
D7
Multiprocessor
bit
0
Stop
bit
1
1 Mark state
(idle state)
MPIE
RDRF
RDR
value
ID1
MPIE = 0
Data2
ID2
RXI interrupt
request
(multiprocessor
interrupt)
generated
RDR data read and
RDRF flag cleared
to 0 in RXI interrupt
service routine
Matches this station’s ID,
so reception continues, and
data is received in RXI
interrupt service routine
MPIE bit set to 1
again
(b) Data matches station's ID
Figure 15.15 Example of SCI Operation in Reception
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
Rev. 5.00 Aug 08, 2006 page 599 of 982
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Section 15 Serial Communication Interface (SCI)
Initialization
[1]
[1] SCI initialization:
The RxD pin is automatically designated
as the receive data input pin.
Start reception
Set MPIE bit in SCR to 1
[2] ID reception cycle:
Set the MPIE bit in SCR to 1.
[2]
[3] SCI status check, ID reception and
comparison:
Read SSR and check that the RDRF
flag is set to 1, then read the receive
data in RDR and compare it with this
station’s ID.
If the data is not this station's ID, set the
MPIE bit to 1 again, and clear the RDRF
flag to 0.
If the data is this station's ID, clear the
RDRF flag to 0.
Read ORER and FER flags in SSR
FER ∨ ORER = 1
Yes
No
Read RDRF flag in SSR
[3]
No
RDRF = 1
[4] SCI status check and data reception:
Read SSR and check that the RDRF
flag is set to 1, then read the data in
RDR.
Yes
Read receive data in RDR
[5] Receive error processing and break
detection:
If a receive error occurs, read the ORER
and FER flags in SSR to identify the
error. After performing the appropriate
error processing, ensure that the ORER
and FER flags are all cleared to 0.
Reception cannot be resumed if either
of these flags is set to 1.
In the case of a framing error, a break
can be detected by reading the RxD pin
value.
No
This station's ID?
Yes
Read ORER and FER flags in SSR
FER ∨ ORER = 1
Yes
No
Read RDRF flag in SSR
[4]
No
RDRF = 1
Yes
Read receive data in RDR
No
All data received?
[5]
Error processing
Yes
Clear RE bit in SCR to 0
(Continued on
next page)
<End>
Figure 15.16 Sample Multiprocessor Serial Reception Flowchart (1)
Rev. 5.00 Aug 08, 2006 page 600 of 982
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Section 15 Serial Communication Interface (SCI)
[5]
Error processing
No
ORER = 1
Yes
Overrun error processing
No
FER = 1
Yes
Yes
Break?
No
Framing error processing
Clear RE bit in SCR to 0
Clear ORER, PER, and
FER flags in SSR to 0
<End>
Figure 15.16 Sample Multiprocessor Serial Reception Flowchart (2)
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Section 15 Serial Communication Interface (SCI)
15.6
Operation in Clocked Synchronous Mode
Figure 15.17 shows the general format for clocked synchronous communication. In clocked
synchronous mode, data is transmitted or received synchronous with clock pulses. In clocked
synchronous serial communication, data on the transmission line is output from one falling edge of
the serial clock to the next. In clocked synchronous mode, the SCI receives data in synchronous
with the rising edge of the serial clock. After 8-bit data is output, the transmission line holds the
MSB state. In clocked synchronous mode, no parity or multiprocessor bit is added. Inside the SCI,
the transmitter and receiver are independent units, enabling full-duplex communication through
the use of a common clock. Both the transmitter and the receiver also have a double-buffered
structure, so data can be read or written during transmission or reception, enabling continuous data
transfer.
One unit of transfer data (character or frame)
*
*
Synchronization
clock
LSB
Bit 0
Serial data
MSB
Bit 1
Bit 2
Bit 3
Bit 4
Don't care
Bit 5
Bit 6
Bit 7
Don't care
Note: * High except in continuous transfer
Figure 15.17 Data Format in Synchronous Communication (For LSB-First)
15.6.1
Clock
Either an internal clock generated by the on-chip baud rate generator or an external
synchronization clock input at the SCK pin can be selected, according to the setting of CKE0 and
CKE1 bits in SCR. When the SCI is operated on an internal clock, the serial clock is output from
the SCK pin. Eight serial clock pulses are output in the transfer of one character, and when no
transfer is performed the clock is fixed high.
15.6.2
SCI Initialization (Clocked Synchronous Mode)
Before transmitting and receiving data, the TE and RE bits in SCR should be cleared to 0, then the
SCI should be initialized as described in a sample flowchart in figure 15.18. When the operating
mode, or transfer format, is changed for example, the TE and RE bits must be cleared to 0 before
making the change using the following procedure. When the TE bit is cleared to 0, the TDRE flag
is set to 1. Note that clearing the RE bit to 0 does not change the contents of the RDRF, PER,
FER, and ORER flags, or the contents of RDR.
Rev. 5.00 Aug 08, 2006 page 602 of 982
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Section 15 Serial Communication Interface (SCI)
Start initialization
[1] Set the clock selection in SCR. Be sure
to clear bits RIE, TIE, TEIE, and MPIE,
TE and RE, to 0.
Clear TE and RE bits in SCR to 0
[2] Set the data transfer format in SMR and
SCMR.
Set CKE1 and CKE0 bits in SCR
(TE, RE bits 0)
[1]
Set data transfer format in
SMR and SCMR
[2]
Set value in BRR
[3]
[3] Write a value corresponding to the bit
rate to BRR. Not necessary if an
external clock is used.
[4] Wait at least one bit interval, then set
the TE bit or RE bit in SCR to 1.
Also set the RIE, TIE TEIE, and MPIE
bits.
Setting the TE and RE bits enables the
TxD and RxD pins to be used.
Wait
No
1-bit interval elapsed?
Yes
Set TE and RE bits in SCR to 1, and
set RIE, TIE, TEIE, and MPIE bits
[4]
<Transfer start>
Note: In simultaneous transmit and receive operations, the TE and RE bits should both be cleared
to 0 or set to 1 simultaneously.
Figure 15.18 Sample SCI Initialization Flowchart
15.6.3
Serial Data Transmission (Clocked Synchronous Mode)
Figure 15.19 shows an example of SCI operation for transmission in clocked synchronous mode.
In serial transmission, the SCI operates as described below.
1. The SCI monitors the TDRE flag in SSR, and if the flag is 0, the SCI recognizes that data has
been written to TDR, and transfers the data from TDR to TSR.
2. After transferring data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts
transmission. If the TIE bit in SCR is set to 1 at this time, a transmit data empty interrupt
(TXI) is generated. Continuous transmission is possible because the TXI interrupt routine
writes the next transmit data to TDR before transmission of the current transmit data has been
completed.
Rev. 5.00 Aug 08, 2006 page 603 of 982
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Section 15 Serial Communication Interface (SCI)
3. 8-bit data is sent from the TxD pin synchronized with the output clock when output clock
mode has been specified, and synchronized with the input clock when use of an external clock
has been specified.
4. The SCI checks the TDRE flag at the timing for sending the MSB (bit 7).
5. If the TDRE flag is cleared to 0, data is transferred from TDR to TSR, and serial transmission
of the next frame is started.
6. If the TDRE flag is set to 1, the TEND flag in SSR is set to 1, and the TDRE flag maintains the
output state of the last bit. If the TEIE bit in SCR is set to 1 at this time, a TEI interrupt request
is generated. The SCK pin is fixed high.
Figure 15.20 shows a sample flow chart for serial data transmission. Even if the TDRE flag is
cleared to 0, transmission will not start while a receive error flag (ORER, FER, or PER) is set to 1.
Make sure that the receive error flags are cleared to 0 before starting transmission. Note that
clearing the RE bit to 0 does not clear the receive error flags.
Transfer direction
Synchronization
clock
Serial data
Bit 0
Bit 1
Bit 7
Bit 0
Bit 1
Bit 6
Bit 7
TDRE
TEND
TXI interrupt
request generated
Data written to TDR
and TDRE flag cleared
to 0 in TXI interrupt
service routine
TXI interrupt
request generated
TEI interrupt request
generated
1 frame
Figure 15.19 Sample SCI Transmission Operation in Clocked Synchronous Mode
Rev. 5.00 Aug 08, 2006 page 604 of 982
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Section 15 Serial Communication Interface (SCI)
[1]
Initialization
Start transmission
Read TDRE flag in SSR
[2]
No
TDRE = 1
Yes
Write transmit data to TDR and
clear TDRE flag in SSR to 0
No
All data transmitted?
[3]
Yes
Read TEND flag in SSR
No
TEND = 1
Yes
Clear TE bit in SCR to 0
[1] SCI initialization:
The TxD pin is automatically
designated as the transmit data output
pin.
[2] SCI status check and transmit data
write:
Read SSR and check that the TDRE
flag is set to 1, then write transmit data
to TDR and clear the TDRE flag to 0.
[3] Serial transmission continuation
procedure:
To continue serial transmission, be
sure to read 1 from the TDRE flag to
confirm that writing is possible, then
write data to TDR, and then clear the
TDRE flag to 0.
Checking and clearing of the TDRE
flag is automatic when the DMAC*1 or
the DTC*2 is activated by a transmit
data empty interrupt (TXI) request and
data is written to TDR.
Notes: 1. Supported only by the
H8S/2239 Group.
2. The case, in which the DTC
automatically clears the TDRE
flag, occurs only when DISEL in
DTC is 0 with the transfer
counter not being 0. Therefore,
the TDRE flag should be
cleared by CPU when DISEL is
1, or when DISEL is 0 with the
transfer counter being 0.
<End>
Figure 15.20 Sample Serial Transmission Flowchart
Rev. 5.00 Aug 08, 2006 page 605 of 982
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Section 15 Serial Communication Interface (SCI)
15.6.4
Serial Data Reception (Clocked Synchronous Mode)
Figure 15.21 shows an example of SCI operation for reception in clocked synchronous mode. In
serial reception, the SCI operates as described below.
1. The SCI performs internal initialization synchronous with a synchronous clock input or output,
starts receiving data, and stores the received data in RSR.
2. If an overrun error occurs (when reception of the next data is completed while the RDRF flag
in SSR is still set to 1), the ORER bit in SSR is set to 1. If the RIE bit in SCR is set to 1 at this
time, an ERI interrupt request is generated, receive data is not transferred to RDR, and the
RDRF flag remains to be set to 1.
3.
If reception is completed successfully, the RDRF bit in SSR is set to 1, and receive data is
transferred to RDR. If the RIE bit in SCR is set to 1 at this time, an RXI interrupt request is
generated. Continuous reception is possible because the RXI interrupt routine reads the
receive data transferred to RDR before reception of the next receive data has finished.
Synchronization
clock
Serial data
Bit 7
Bit 0
Bit 7
Bit 0
Bit 1
Bit 6
Bit 7
RDRF
ORER
RXI interrupt
request
generated
RDR data read and
RDRF flag cleared
to 0 in RXI interrupt
RXI interrupt
request generated
ERI interrupt request
generated by overrun
error
1 frame
Figure 15.21 Example of SCI Operation in Reception
Reception cannot be resumed while a receive error flag is set to 1. Accordingly, clear the ORER,
FER, PER, and RDRF bits to 0 before resuming reception. Figure 15.22 shows a sample flow
chart for serial data reception.
An overrun error occurs or synchronous clocks are output until the RE bit is cleared to 0 when an
internal clock is selected and only receive operation is possible. When a transmission and
reception will be carried out in a unit of one frame, be sure to carry out a dummy transmission
with only one frame by the simultaneous transmit and receive operations at the same time.
Rev. 5.00 Aug 08, 2006 page 606 of 982
REJ09B0054-0500
Section 15 Serial Communication Interface (SCI)
Initialization
[1]
Start reception
[2]
Read ORER flag in SSR
Yes
[3]
ORER = 1
No
Error processing
(Continued below)
Read RDRF flag in SSR
[4]
No
RDRF = 1
Yes
Read receive data in RDR, and
clear RDRF flag in SSR to 0
No
All data received?
Yes
[5]
[1] SCI initialization:
The RxD pin is automatically
designated as the receive data input
pin.
[2] [3] Receive error processing:
If a receive error occurs, read the
ORER flag in SSR, and after
performing the appropriate error
processing, clear the ORER flag to 0.
Transfer cannot be resumed if the
ORER flag is set to 1.
[4] SCI status check and receive data
read:
Read SSR and check that the RDRF
flag is set to 1, then read the receive
data in RDR and cle