Renesas H8/3855 8-bit single-chip microcomputer Datasheet

REJ09B0397-0300
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.
8
H8/3857 Group, H8/3857 F-ZTAT™,
H8/3854 Group, H8/3854 F-ZTAT™
Hardware Manual
Renesas 8-Bit Single-Chip Microcomputer
H8 Family/H8/300L Series
H8/3857
H8/3856
H8/3855
H8/3857 F-ZTAT™
HD6433857, HCD6433857
HD6433856, HCD6433856
HD6433855, HCD6433855
HD64F3857, HCD64F3857
H8/3854
H8/3853
H8/3852
H8/3854 F-ZTAT™
HD6433854, HCD6433854
HD6433853, HCD6433853
HD6433852, HCD6433852
HD64F3854, HCD64F3854
Rev.3.00
Revision date: Jul. 19, 2007
www.renesas.com
Notes regarding these materials
1. This document is provided for reference purposes only so that Renesas customers may select the appropriate
Renesas products for their use. Renesas neither makes warranties or representations with respect to the
accuracy or completeness of the information contained in this document nor grants any license to any
intellectual property rights or any other rights of Renesas or any third party with respect to the information in
this document.
2. Renesas shall have no liability for damages or infringement of any intellectual property or other rights arising
out of the use of any information in this document, including, but not limited to, product data, diagrams, charts,
programs, algorithms, and application circuit examples.
3. You should not use the products or the technology described in this document for the purpose of military
applications such as the development of weapons of mass destruction or for the purpose of any other military
use. When exporting the products or technology described herein, you should follow the applicable export
control laws and regulations, and procedures required by such laws and regulations.
4. All information included in this document such as product data, diagrams, charts, programs, algorithms, and
application circuit examples, is current as of the date this document is issued. Such information, however, is
subject to change without any prior notice. Before purchasing or using any Renesas products listed in this
document, please confirm the latest product information with a Renesas sales office. Also, please pay regular
and careful attention to additional and different information to be disclosed by Renesas such as that disclosed
through our website. (http://www.renesas.com )
5. Renesas has used reasonable care in compiling the information included in this document, but Renesas
assumes no liability whatsoever for any damages incurred as a result of errors or omissions in the information
included in this document.
6. When using or otherwise relying on the information in this document, you should evaluate the information in
light of the total system before deciding about the applicability of such information to the intended application.
Renesas makes no representations, warranties or guaranties regarding the suitability of its products for any
particular application and specifically disclaims any liability arising out of the application and use of the
information in this document or Renesas products.
7. With the exception of products specified by Renesas as suitable for automobile applications, Renesas
products are not designed, manufactured or tested for applications or otherwise in systems the failure or
malfunction of which may cause a direct threat to human life or create a risk of human injury or which require
especially high quality and reliability such as safety systems, or equipment or systems for transportation and
traffic, healthcare, combustion control, aerospace and aeronautics, nuclear power, or undersea communication
transmission. If you are considering the use of our products for such purposes, please contact a Renesas
sales office beforehand. Renesas shall have no liability for damages arising out of the uses set forth above.
8. Notwithstanding the preceding paragraph, you should not use Renesas products for the purposes listed below:
(1) artificial life support devices or systems
(2) surgical implantations
(3) healthcare intervention (e.g., excision, administration of medication, etc.)
(4) any other purposes that pose a direct threat to human life
Renesas shall have no liability for damages arising out of the uses set forth in the above and purchasers who
elect to use Renesas products in any of the foregoing applications shall indemnify and hold harmless Renesas
Technology Corp., its affiliated companies and their officers, directors, and employees against any and all
damages arising out of such applications.
9. You should use the products described herein within the range specified by Renesas, especially with respect
to the maximum rating, operating supply voltage range, movement power voltage range, heat radiation
characteristics, installation and other product characteristics. Renesas shall have no liability for malfunctions or
damages arising out of the use of Renesas products beyond such specified ranges.
10. Although Renesas endeavors to improve the quality and reliability of its products, IC products have specific
characteristics such as the occurrence of failure at a certain rate and malfunctions under certain use
conditions. Please be sure to implement safety measures to guard against the possibility of physical injury, and
injury or damage caused by fire in the event of the failure of a Renesas product, such as safety design for
hardware and software including but not limited to redundancy, fire control and malfunction prevention,
appropriate treatment for aging degradation or any other applicable measures. Among others, since the
evaluation of microcomputer software alone is very difficult, please evaluate the safety of the final products or
system manufactured by you.
11. In case Renesas products listed in this document are detached from the products to which the Renesas
products are attached or affixed, the risk of accident such as swallowing by infants and small children is very
high. You should implement safety measures so that Renesas products may not be easily detached from your
products. Renesas shall have no liability for damages arising out of such detachment.
12. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written
approval from Renesas.
13. Please contact a Renesas sales office if you have any questions regarding the information contained in this
document, Renesas semiconductor products, or if you have any other inquiries.
Rev.3.00 Jul. 19, 2007 page ii of xxiv
REJ09B0397-0300
General Precautions in the Handling of MPU/MCU Products
The following usage notes are applicable to all MPU/MCU products from Renesas. For detailed usage notes
on the products covered by this manual, refer to the relevant sections of the manual. If the descriptions under
General Precautions in the Handling of MPU/MCU Products and in the body of the manual differ from each
other, the description in the body of the manual takes precedence.
1. Handling of Unused Pins
Handle unused pins in accord with the directions given under Handling of Unused Pins in
the manual.
⎯ The input pins of CMOS products are generally in the high-impedance state. In
operation with an unused pin in the open-circuit state, extra electromagnetic noise is
induced in the vicinity of LSI, an associated shoot-through current flows internally, and
malfunctions may occur due to the false recognition of the pin state as an input signal.
Unused pins should be handled as described under Handling of Unused Pins in the
manual.
2. Processing at Power-on
The state of the product is undefined at the moment when power is supplied.
⎯ The states of internal circuits in the LSI are indeterminate and the states of register
settings and pins are undefined at the moment when power is supplied.
In a finished product where the reset signal is applied to the external reset pin, the
states of pins are not guaranteed from the moment when power is supplied until the
reset process is completed.
In a similar way, the states of pins in a product that is reset by an on-chip power-on
reset function are not guaranteed from the moment when power is supplied until the
power reaches the level at which resetting has been specified.
3. Prohibition of Access to Reserved Addresses
Access to reserved addresses is prohibited.
⎯ The reserved addresses are provided for the possible future expansion of functions. Do
not access these addresses; the correct operation of LSI is not guaranteed if they are
accessed.
4. Clock Signals
After applying a reset, only release the reset line after the operating clock signal has
become stable. When switching the clock signal during program execution, wait until the
target clock signal has stabilized.
⎯ When the clock signal is generated with an external resonator (or from an external
oscillator) during a reset, ensure that the reset line is only released after full stabilization
of the clock signal. Moreover, when switching to a clock signal produced with an
external resonator (or by an external oscillator) while program execution is in progress,
wait until the target clock signal is stable.
5. Differences between Products
Before changing from one product to another, i.e. to one with a different type number,
confirm that the change will not lead to problems.
⎯ The characteristics of MPU/MCU in the same group but having different type numbers
may differ because of the differences in internal memory capacity and layout pattern.
When changing to products of different type numbers, implement a system-evaluation
test for each of the products.
Rev.3.00 Jul. 19, 2007 page iii of xxiv
REJ09B0397-0300
Rev.3.00 Jul. 19, 2007 page iv of xxiv
REJ09B0397-0300
Preface
The H8/300L Series of single-chip microcomputers has the high-speed H8/300L CPU at its core,
with many necessary peripheral functions on-chip. The H8/300L CPU instruction set is compatible
with the H8/300 CPU.
The H8/3857 Group has the following on-chip peripheral functions required for system
configuration: a maximum 1,280-dot display LCD controller, four types of timers, a 14-bit PWM,
a 2-channel serial communication interface, and an 8-channel A/D converter.
The H8/3854 Group has the following on-chip peripheral functions required for system
configuration: a maximum 640-dot display LCD controller, three types of timers, a single-channel
serial communication interface, and a 4-channel A/D converter.
Both series can be used as embedded microcomputers in systems requiring LCD display.
The H8/3857, H8/3856, H8/3855, H8/3854, H8/3853, and H8/3852 are available in mask ROM
versions, and the H8/3857 and H8/3854 are also available in an F-ZTAT™* version which allows
programs to be written after the chip is mounted on a board.
Note: * F-ZTAT (Flexible Zero Turn-Around Time) is a trademark of Renesas Technology
Corp.
This manual describes the hardware of the H8/3857 Group and H8/3854 Group. For details on the
H8/3857 Group and H8/3854 Group instruction set, refer to the H8/300L Series Software Manual.
Rev.3.00 Jul. 19, 2007 page v of xxiv
REJ09B0397-0300
List of Functions
Group
H8/3857 Group
H8/3854 Group
F-ZTAT
Version
F-ZTAT
Version
Mask ROM Version
Mask ROM Version
Part No.
H8/3857F H8/3857 H8/3856 H8/3855
H8/3854F H8/3854 H8/3853 H8/3852
ROM size (kbytes)
60
60
48
40
60*
32*
24
16
RAM size (kbytes)
2
2
2
2
2*
1*
1*
1*
I/O ports
Input/output
ports
35
35
35
35
24
24
24
24
Input
ports
9
9
9
9
5
5
5
5
External
interrupts
13
sources
13
13
13
sources sources sources
12
sources
12
12
12
sources sources sources
Internal
interrupts
16
sources
16
16
16
sources sources sources
14
sources
14
14
14
sources sources sources
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Interrupts
Timer A (for realtime
clock)
Timer B (8 bits)
Timer C (8 bits)
Timer F (16 bits)
Watchdog timer
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Serial communication
interface (SCI)
×2
×2
×2
×2
×1
×1
×1
×1
A/D converter
8 ch
8 ch
8 ch
8 ch
4 ch
4 ch
4 ch
4 ch
LCD
controller
Max.
display dots
1280
dots
1280
dots
1280
dots
1280
dots
640
dots
640
dots
640
dots
640
dots
Display
RAM size
2048
bits
2048
bits
2048
bits
2048
bits
640
bits
640
bits
640
bits
640
bits
Pins
144
144
144
144
100
100
100
100
Shipping
form
FP-144H (20 × 20 mm)
TFP-144 (16 × 16 mm)
Die (F-ZTAT version: 7.08 × 7.31 mm /
mask ROM version: 6.21 × 6.21 mm)
14-bit PWM
Packages
Note:
*
FP-100B (14 × 14 mm)
TFP-100G (12 × 12 mm)
Die (F-ZTAT version: 6.34 × 6.34 mm /
mask ROM version: 4.69 × 4.69 mm)
Note that the H8/3854F (F-ZTAT version) and H8/3854 (mask ROM version) have
different ROM and RAM sizes.
When carrying out program development using the H8/3854F with the intention of mask
ROM implementation, care must be taken with ROM and RAM sizes since the
maximum sizes for the mask ROM version are 32 kbytes of ROM and 1 kbyte of RAM.
Rev.3.00 Jul. 19, 2007 page vi of xxiv
REJ09B0397-0300
Main Revisions for This Edition
Item
Page
Revision (See Manual for Details)
All
⎯
•
Company name and brand names amended
(Before) Hitachi, Ltd. → (After) Renesas Technology Corp.
•
Designation for categories amended
(Before) H8/3857 Series → (After) H8/3857 Group
(Before) H8/3854 Series → (After) H8/3854 Group
2.2.1 General
Registers
29
Figure amended
Lower address side [H'0000]
Figure 2.2 Stack
Pointer
Unused area
SP (R7)
Stack area
Upper address side [H'FFFF]
4.3 Subclock
Generator
98
Table condition amended
(VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F and
H8/3857 Group, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V,
Ta = –20°C to + 75°C*, unless otherwise specified, including
subactive mode)
Table 4.2 DC
Characteristics and
Timing
Table note amended
Note: * The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
6.2.1 Features
120
Description amended
• Programming/erase methods
The flash memory is programmed 32 bytes at a time. Erasing is
performed in block units. To erase multiple blocks, each block
must be erased in turn. In block erasing, 1-kbyte, 28-kbyte, 16kbyte, and 12-kbyte blocks can be set arbitrarily.
6.5.4 Erase-Verify
Mode
143
Description amended
After the elapse of the erase time, erase mode is exited (the E
bit in FLMCR1 is cleared, then the ESU bit in FLMCR2 is
cleared at least (α) μs later).
Rev.3.00 Jul. 19, 2007 Page vii of xxiv
REJ09B0397-0300
Item
Page
Revision (See Manual for Details)
8.3 Port 2
182
Description amended
The UD function multiplexed with the P21 pin is provided only in
the H8/3857 Group, and not in the H8/3854 Group.
11.3 Operation
314
Figure amended
Figure 11.2 PWM
Output Waveform
TH = t H1 + t H2 + t H3 + ..... t H64
15.2.2 DC
409
Characteristics
Table15.2 DC
Characteristics of
H8/3855, H8/3856, and
H8/3857 (1)
Table note amended
Notes: 4. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table15.3 DC
410
Characteristics of
H8/3855, H8/3856, and
H8/3857 (2)
Table amended
t f1 = t f2 = t f3 ..... = t f64
Item
Symbol
Allowable
output low
current
(per pin)
IOL
Allowable
ΣIOL
output low
current (total)
Allowable
output high
current
(per pin)
–IOH
Allowable
Σ–IOH
output high
current (total)
Table note amended
Notes: 2. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Rev.3.00 Jul. 19, 2007 Page viii of xxiv
REJ09B0397-0300
Item
Page
Revision (See Manual for Details)
15.2.3 AC
Characteristics
412
Table note amended
Notes: 3. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table15.4 Control
Signal Timing of
H8/3855, H8/3856, and
H8/3857
Table15.5 Serial
413
Interface (SCI1) Timing
of H8/3855, H8/3856,
and H8/3857
Note: * The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table15.6 Serial
414
Interface (SCI3) Timing
of H8/3855, H8/3856,
and H8/3857
Note: * The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
15.2.4 A/D Converter
Characteristics
415
416
Table note amended
Table note amended
Notes: 4. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table15.8 LCD
Characteristics of
H8/3855, H8/3856, and
H8/3857
Table15.9 Step-Up
417
Circuit Characteristics of
H8/3855, H8/3856, and
H8/3857
15.4 Output Load
Circuit
Table note amended
Notes: 4. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table15.7 A/D
Converter
Characteristics of
H8/3855, H8/3856, and
H8/3857
15.2.5 LCD
Characteristics
Table note amended
422
Table note amended
Notes: 2. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Figure amended
VCC
Figure 15.10 Output
Load Conditions
2.4 kΩ
LSI Chip Output pin
30 pF
12 kΩ
Rev.3.00 Jul. 19, 2007 Page ix of xxiv
REJ09B0397-0300
Item
Page
Revision (See Manual for Details)
16.2.1 Power Supply
Voltage and Operating
Range
424
Figure amended
(1) Power Supply
Voltage vs. Oscillator
Frequency Range
32.768
fW (kHz)
fOSC (MHz)
10.0
5.0
2.0
2.7* 3.0
4.0
5.5
2.7* 3.0
4.0
5.5
VCC (V)
VCC (V)
• Active mode (high speed)
• Sleep mode
• Active mode (medium speed)
Note added
Note: * The minimum VCC level of the H8/3854F is 3.0 V.
Figure amended
5.0
φ SUB (kHz)
425
φ (MHz)
(2) Power Supply
Voltage vs. Operating
Frequency Range
2.5
1.0
0.5
} *1
2.7*2 3.0
4.0
19.200
16.384
*1
9.600
8.192
4.800
4.096
*1
*1
2.7*2 3.0
5.5
4.0
5.5
VCC (V)
VCC (V)
• Active mode (high speed)
• Sleep mode (except CPU)
• Subactive mode
• Subsleep mode (except CPU)
• Watch mode (except CPU)
φ (kHz)
625.0
500.0
312.5
62.5
2.7 3.0
4.0
5.5
VCC (V)
• Active mode (medium speed)
Note added
Notes: 1. In case of external clock only
2. The minimum VCC level of the H8/3854F is 3.0 V.
Figure amended
625.0
φ (kHz)
5.0
φ (MHz)
(3) Power Supply
Voltage vs. A/D
Converter Operating
Range
2.5
0.5
500.0
312.5
62.5
2.7* 3.0
4.0
5.5
2.7 3.0
4.0
VCC (V)
• Active mode (high speed)
• Sleep mode
• Active mode (medium speed)
Note added
Note: * The minimum VCC level of the H8/3854F is 3.0 V.
Rev.3.00 Jul. 19, 2007 Page x of xxiv
REJ09B0397-0300
5.5
VCC (V)
Item
Page
Revision (See Manual for Details)
16.2.2 DC
Characteristics
426
Table condition amended
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F,
VSS = 0.0 V, Ta = –20°C to +75°C*4, including subactive mode,
unless otherwise specified.
Table 16.2 DC
Characteristics of
H8/3852, H8/3853, and
H8/3854 (1)
429
Table note amended
Notes: 4. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table 16.3 DC
430
Characteristics of
H8/3852, H8/3853, and
H8/3854 (2)
Table condition amended
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F,
VSS = 0.0 V, Ta = –20°C to +75°C*2, including subactive mode,
unless otherwise specified.
Table amended
Item
Symbol
Allowable
output low
current
(per pin)
IOL
Allowable
ΣIOL
output low
current (total)
Allowable
output high
current
(per pin)
–IOH
Allowable
Σ–IOH
output high
current (total)
Table note amended
Notes: 2. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Rev.3.00 Jul. 19, 2007 Page xi of xxiv
REJ09B0397-0300
Item
Page
Revision (See Manual for Details)
16.2.3 AC
Characteristics
431
Description amended
Table 16.4 shows the control signal timing, and table 16.5
shows the serial interface timing, of the H8/3852, H8/3853, and
H8/3854.
Table 16.4 Control
Signal Timing of
H8/3852, H8/3853, and
H8/3854
Table condition amended
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F,
VSS = 0.0 V, Ta = –20°C to +75°C*3, including subactive mode,
unless otherwise specified.
432
Table note amended
Notes: 3. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Table 16.5 Serial
433
Interface (SCI3) Timing
of H8/3852, H8/3853,
and H8/3854
Table condition amended
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F,
VSS = 0.0 V, Ta = –20°C to +75°C*, unless otherwise specified.
Table note amended
Note: * The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
16.2.4 A/D Converter
Characteristics
434
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F,
VSS = 0.0 V, Ta = –20°C to +75°C*, unless otherwise specified.
Table 16.6 A/D
Converter
Characteristics of
H8/3852, H8/3853, and
H8/3854
16.2.5 LCD
Characteristics
Table 16.7 LCD
Characteristics of
H8/3852, H8/3853, and
H8/3854
Table condition amended
Table note amended
Note: * The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
435
Table condition amended
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852,
H8/3853, and H8/3854, VCC = 3.0 V to 5.5 V of H8/3854F,
VSS = 0.0 V, Ta = –20°C to +75°C*2, including subactive mode,
unless otherwise specified.
Table note amended
Notes: 2. The guaranteed temperature as an electrical
characteristic for die type products is 75°C.
Rev.3.00 Jul. 19, 2007 Page xii of xxiv
REJ09B0397-0300
Item
Page
Revision (See Manual for Details)
B.2 Register
Descriptions
492
Bit table amended
PMR2—Port mode
register 2
P43 /IRQ 0 pin function switch
0 Functions as P4 3 input pin
1 Functions as IRQ 0 input pin
Rev.3.00 Jul. 19, 2007 Page xiii of xxiv
REJ09B0397-0300
All trademarks and registered trademarks are the property of their respective owners.
Rev.3.00 Jul. 19, 2007 Page xiv of xxiv
REJ09B0397-0300
Contents
Section 1 Overview .............................................................................................................
1.1
1.2
1.3
1
Overview........................................................................................................................... 1
Internal Block Diagram..................................................................................................... 6
Pin Arrangement and Functions........................................................................................ 8
1.3.1 Pin Arrangement .................................................................................................. 8
1.3.2 Pin Functions ....................................................................................................... 20
Section 2 CPU ...................................................................................................................... 27
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Overview...........................................................................................................................
2.1.1 Features................................................................................................................
2.1.2 Address Space......................................................................................................
2.1.3 Register Configuration.........................................................................................
Register Descriptions ........................................................................................................
2.2.1 General Registers .................................................................................................
2.2.2 Control Registers .................................................................................................
2.2.3 Initial Register Values..........................................................................................
Data Formats .....................................................................................................................
2.3.1 Data Formats in General Registers ......................................................................
2.3.2 Memory Data Formats .........................................................................................
Addressing Modes.............................................................................................................
2.4.1 Addressing Modes ...............................................................................................
2.4.2 Effective Address Calculation .............................................................................
Instruction Set ...................................................................................................................
2.5.1 Data Transfer Instructions....................................................................................
2.5.2 Arithmetic Operations..........................................................................................
2.5.3 Logic Operations..................................................................................................
2.5.4 Shift Operations ...................................................................................................
2.5.5 Bit Manipulations.................................................................................................
2.5.6 Branching Instructions .........................................................................................
2.5.7 System Control Instructions.................................................................................
2.5.8 Block Data Transfer Instruction...........................................................................
Basic Operational Timing .................................................................................................
2.6.1 Access to On-Chip Memory (RAM, ROM).........................................................
2.6.2 Access to On-Chip Peripheral Modules ...............................................................
CPU States ........................................................................................................................
2.7.1 Overview..............................................................................................................
2.7.2 Program Execution State......................................................................................
27
27
28
28
29
29
29
31
31
32
33
34
34
36
40
42
44
45
45
47
51
53
54
55
55
56
57
57
59
Rev.3.00 Jul. 19, 2007 page xv of xxiv
REJ09B0397-0300
2.8
2.9
2.7.3 Program Halt State...............................................................................................
2.7.4 Exception-Handling State ....................................................................................
Memory Map ....................................................................................................................
2.8.1 Memory Map .......................................................................................................
Application Notes .............................................................................................................
2.9.1 Notes on Data Access ..........................................................................................
2.9.2 Notes on Bit Manipulation...................................................................................
2.9.3 Notes on Use of the EEPMOV Instruction ..........................................................
59
59
60
60
62
62
64
70
Section 3 Exception Handling ......................................................................................... 71
3.1
3.2
3.3
3.4
Overview...........................................................................................................................
Reset..................................................................................................................................
3.2.1 Overview..............................................................................................................
3.2.2 Reset Sequence ....................................................................................................
3.2.3 Interrupt Immediately after Reset ........................................................................
Interrupts...........................................................................................................................
3.3.1 Overview..............................................................................................................
3.3.2 Interrupt Control Registers ..................................................................................
3.3.3 External Interrupts ...............................................................................................
3.3.4 Internal Interrupts ................................................................................................
3.3.5 Interrupt Operations .............................................................................................
3.3.6 Interrupt Response Time......................................................................................
Application Notes .............................................................................................................
3.4.1 Notes on Stack Area Use .....................................................................................
3.4.2 Notes on Rewriting Port Mode Registers.............................................................
71
71
71
71
72
73
73
75
83
84
84
89
89
89
90
Section 4 Clock Pulse Generators ................................................................................... 93
4.1
4.2
4.3
4.4
4.5
Overview...........................................................................................................................
4.1.1 Block Diagram.....................................................................................................
4.1.2 System Clock and Subclock.................................................................................
System Clock Generator ...................................................................................................
Subclock Generator...........................................................................................................
Prescalers ..........................................................................................................................
Note on Oscillators ...........................................................................................................
93
93
93
94
96
99
100
Section 5 Power-Down Modes ........................................................................................ 101
5.1
5.2
Overview...........................................................................................................................
5.1.1 System Control Registers.....................................................................................
Sleep Mode .......................................................................................................................
5.2.1 Transition to Sleep Mode.....................................................................................
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101
104
107
107
5.3
5.4
5.5
5.6
5.7
5.8
5.2.2 Clearing Sleep Mode............................................................................................
Standby Mode ...................................................................................................................
5.3.1 Transition to Standby Mode.................................................................................
5.3.2 Clearing Standby Mode .......................................................................................
5.3.3 Oscillator Settling Time after Standby Mode Is Cleared .....................................
5.3.4 Transition to Standby Mode and Port Pin States..................................................
5.3.5 Notes on External Input Signal Changes before/after Standby Mode..................
Watch Mode......................................................................................................................
5.4.1 Transition to Watch Mode ...................................................................................
5.4.2 Clearing Watch Mode ..........................................................................................
5.4.3 Oscillator Settling Time after Watch Mode Is Cleared........................................
5.4.4 Notes on External Input Signal Changes before/after Watch Mode ....................
Subsleep Mode..................................................................................................................
5.5.1 Transition to Subsleep Mode ...............................................................................
5.5.2 Clearing Subsleep Mode ......................................................................................
Subactive Mode.................................................................................................................
5.6.1 Transition to Subactive Mode ..............................................................................
5.6.2 Clearing Subactive Mode.....................................................................................
5.6.3 Operating Frequency in Subactive Mode.............................................................
Active (medium-speed) Mode...........................................................................................
5.7.1 Transition to Active (medium-speed) Mode ........................................................
5.7.2 Clearing Active (medium-speed) Mode...............................................................
5.7.3 Operating Frequency in Active (medium-speed) Mode.......................................
Direct Transfer ..................................................................................................................
5.8.1 Direct Transfer Overview ....................................................................................
5.8.2 Calculation of Direct Transfer Time before Transition........................................
5.8.3 Notes on External Input Signal Changes before/after Direct Transition..............
107
108
108
108
108
109
110
111
111
112
112
112
112
112
113
113
113
113
114
114
114
114
114
115
115
116
118
Section 6 ROM ..................................................................................................................... 119
6.1
6.2
6.3
Overview...........................................................................................................................
6.1.1 Block Diagram .....................................................................................................
Overview of Flash Memory ..............................................................................................
6.2.1 Features................................................................................................................
6.2.2 Block Diagram .....................................................................................................
6.2.3 Flash Memory Operating Modes .........................................................................
6.2.4 Pin Configuration.................................................................................................
6.2.5 Register Configuration.........................................................................................
Flash Memory Register Descriptions................................................................................
6.3.1 Flash Memory Control Register 1 (FLMCR1).....................................................
6.3.2 Flash Memory Control Register 2 (FLMCR2).....................................................
119
119
120
120
121
122
125
126
126
126
129
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6.3.3 Erase Block Register (EBR) ................................................................................
6.3.4 Mode Control Register (MDCR) .........................................................................
6.3.5 System Control Register 3 (SYSCR3) .................................................................
6.4 On-Board Programming Modes........................................................................................
6.4.1 Boot Mode ...........................................................................................................
6.4.2 User Program Mode.............................................................................................
6.5 Flash Memory Programming/Erasing ...............................................................................
6.5.1 Program Mode .....................................................................................................
6.5.2 Program-Verify Mode..........................................................................................
6.5.3 Erase Mode ..........................................................................................................
6.5.4 Erase-Verify Mode ..............................................................................................
6.6 Flash Memory Protection..................................................................................................
6.6.1 Hardware Protection ............................................................................................
6.6.2 Software Protection..............................................................................................
6.6.3 Error Protection....................................................................................................
6.7 Interrupt Handling during Flash Memory Programming and Erasing ..............................
6.8 Flash Memory Writer Mode .............................................................................................
6.8.1 Writer Mode Setting ............................................................................................
6.8.2 Socket Adapter and Memory Map .......................................................................
6.8.3 Writer Mode Operation........................................................................................
6.8.4 Memory Read Mode ............................................................................................
6.8.5 Auto-Program Mode ............................................................................................
6.8.6 Auto-Erase Mode.................................................................................................
6.8.7 Status Read Mode ................................................................................................
6.8.8 Status Polling .......................................................................................................
6.8.9 Writer Mode Transition Time..............................................................................
6.8.10 Notes on Memory Programming..........................................................................
6.9 Flash Memory Programming and Erasing Precautions .....................................................
6.10 Notes when Converting the F-ZTAT Application Software to the Mask-ROM Versions
130
131
131
132
133
138
140
140
141
143
143
145
145
146
146
148
149
149
149
153
154
158
160
161
162
163
163
164
166
Section 7 RAM ..................................................................................................................... 167
7.1
Overview........................................................................................................................... 167
7.1.1 Block Diagram..................................................................................................... 167
Section 8 I/O Ports .............................................................................................................. 169
8.1
8.2
Overview...........................................................................................................................
Port 1.................................................................................................................................
8.2.1 Overview..............................................................................................................
8.2.2 Register Configuration and Description...............................................................
8.2.3 Pin Functions .......................................................................................................
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172
172
173
178
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.2.4 Pin States..............................................................................................................
8.2.5 MOS Input Pull-Up..............................................................................................
Port 2.................................................................................................................................
8.3.1 Overview..............................................................................................................
8.3.2 Register Configuration and Description...............................................................
8.3.3 Pin Functions .......................................................................................................
8.3.4 Pin States..............................................................................................................
Port 3 (H8/3857 Group Only) ...........................................................................................
8.4.1 Overview..............................................................................................................
8.4.2 Register Configuration and Description...............................................................
8.4.3 Pin Functions .......................................................................................................
8.4.4 Pin States..............................................................................................................
8.4.5 MOS Input Pull-Up..............................................................................................
Port 4.................................................................................................................................
8.5.1 Overview..............................................................................................................
8.5.2 Register Configuration and Description...............................................................
8.5.3 Pin Functions .......................................................................................................
8.5.4 Pin States..............................................................................................................
Port 5.................................................................................................................................
8.6.1 Overview..............................................................................................................
8.6.2 Register Configuration and Description...............................................................
8.6.3 Pin Functions .......................................................................................................
8.6.4 Pin States..............................................................................................................
8.6.5 MOS Input Pull-Up..............................................................................................
Port 9 [Chip-Internal I/O port] ..........................................................................................
8.7.1 Overview..............................................................................................................
8.7.2 Register Configuration and Description...............................................................
8.7.3 Pin Functions .......................................................................................................
8.7.4 Pin States..............................................................................................................
Port A [Chip-Internal I/O port] .........................................................................................
8.8.1 Overview..............................................................................................................
8.8.2 Register Configuration and Description...............................................................
8.8.3 Pin Functions .......................................................................................................
8.8.4 Pin States..............................................................................................................
Port B ................................................................................................................................
8.9.1 Overview..............................................................................................................
8.9.2 Register Configuration and Description...............................................................
181
182
182
182
183
187
188
189
189
189
192
193
193
194
194
194
196
197
197
197
198
200
200
200
201
201
201
202
203
203
203
204
205
205
206
206
207
Section 9 Timers .................................................................................................................. 209
9.1
Overview........................................................................................................................... 209
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9.2
9.3
9.4
9.5
9.6
Timer A.............................................................................................................................
9.2.1 Overview..............................................................................................................
9.2.2 Register Descriptions ...........................................................................................
9.2.3 Timer Operation...................................................................................................
9.2.4 Timer A Operation States ....................................................................................
Timer B .............................................................................................................................
9.3.1 Overview..............................................................................................................
9.3.2 Register Descriptions ...........................................................................................
9.3.3 Timer Operation...................................................................................................
9.3.4 Timer B Operation States.....................................................................................
Timer C (H8/3857 Group Only) .......................................................................................
9.4.1 Overview..............................................................................................................
9.4.2 Register Descriptions ...........................................................................................
9.4.3 Timer Operation...................................................................................................
9.4.4 Timer C Operation States.....................................................................................
Timer F .............................................................................................................................
9.5.1 Overview..............................................................................................................
9.5.2 Register Descriptions ...........................................................................................
9.5.3 Interface with the CPU.........................................................................................
9.5.4 Timer Operation...................................................................................................
9.5.5 Application Notes ................................................................................................
Watchdog Timer [H8/3857F and H8/3854F Only]...........................................................
9.6.1 Overview..............................................................................................................
9.6.2 Register Descriptions ...........................................................................................
9.6.3 Operation .............................................................................................................
9.6.4 Watchdog Timer Operating Modes......................................................................
210
210
212
214
215
215
215
217
219
220
220
220
222
224
226
226
226
229
235
238
240
241
241
243
246
247
Section 10 Serial Communication Interface ................................................................ 249
10.1 Overview........................................................................................................................... 249
10.2 SCI1 (H8/3857 Group Only)............................................................................................. 250
10.2.1 Overview.............................................................................................................. 250
10.2.2 Register Descriptions ........................................................................................... 252
10.2.3 Operation ............................................................................................................. 256
10.2.4 Interrupts.............................................................................................................. 259
10.2.5 Application Notes ................................................................................................ 259
10.3 SCI3 .................................................................................................................................. 260
10.3.1 Overview.............................................................................................................. 260
10.3.2 Register Descriptions ........................................................................................... 262
10.3.3 Operation ............................................................................................................. 279
10.3.4 Operation in Asynchronous Mode ....................................................................... 283
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10.3.5
10.3.6
10.3.7
10.3.8
Operation in Synchronous Mode .........................................................................
Multiprocessor Communication Function............................................................
Interrupts..............................................................................................................
Application Notes ................................................................................................
292
299
305
306
Section 11 14-Bit PWM (H8/3857 Group Only) ....................................................... 311
11.1 Overview...........................................................................................................................
11.1.1 Features................................................................................................................
11.1.2 Block Diagram .....................................................................................................
11.1.3 Pin Configuration.................................................................................................
11.1.4 Register Configuration.........................................................................................
11.2 Register Descriptions ........................................................................................................
11.2.1 PWM Control Register (PWCR)..........................................................................
11.2.2 PWM Data Registers U and L (PWDRU, PWDRL)............................................
11.3 Operation...........................................................................................................................
311
311
311
312
312
312
312
313
314
Section 12 A/D Converter .................................................................................................
12.1 Overview...........................................................................................................................
12.1.1 Features................................................................................................................
12.1.2 Block Diagram .....................................................................................................
12.1.3 Pin Configuration.................................................................................................
12.1.4 Register Configuration.........................................................................................
12.2 Register Descriptions ........................................................................................................
12.2.1 A/D Result Register (ADRR) ..............................................................................
12.2.2 A/D Mode Register (AMR) .................................................................................
12.2.3 A/D Start Register (ADSR)..................................................................................
12.3 Operation...........................................................................................................................
12.3.1 A/D Conversion Operation ..................................................................................
12.3.2 Start of A/D Conversion by External Trigger Input.............................................
12.4 Interrupts ...........................................................................................................................
12.5 Typical Use .......................................................................................................................
12.6 Application Notes .............................................................................................................
315
315
315
316
317
317
318
318
318
320
321
321
321
322
322
325
Section 13 Dot Matrix LCD Controller (H8/3857 Group) ...................................... 327
13.1 Overview...........................................................................................................................
13.1.1 Features................................................................................................................
13.1.2 Block Diagram .....................................................................................................
13.1.3 Pin Configuration.................................................................................................
13.1.4 Register Configuration.........................................................................................
13.2 Register Descriptions ........................................................................................................
327
327
328
329
330
330
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13.2.1 Index Register (IR) ..............................................................................................
13.2.2 Control Register 1 (LR0) .....................................................................................
13.2.3 Control Register 2 (LR1) .....................................................................................
13.2.4 Address Register (LR2) .......................................................................................
13.2.5 Frame Frequency Setting Register (LR3) ............................................................
13.2.6 Display Data Register (LR4)................................................................................
13.2.7 Display Start Line Register (LR5) .......................................................................
13.2.8 Blink Register (LR6)............................................................................................
13.2.9 Blink Start Line Register (LR8)...........................................................................
13.2.10 Blink End Line Register (LR9)............................................................................
13.2.11 Contrast Control Register (LRA).........................................................................
13.3 Operation ..........................................................................................................................
13.3.1 System Overview.................................................................................................
13.3.2 CPU Interface ......................................................................................................
13.3.3 LCD Drive Pin Functions ....................................................................................
13.3.4 Display Memory Configuration and Display.......................................................
13.3.5 Display Data Output ............................................................................................
13.3.6 Register and Display Memory Access .................................................................
13.3.7 Scroll Function.....................................................................................................
13.3.8 Blink Function .....................................................................................................
13.3.9 Module Standby Mode.........................................................................................
13.3.10 Power-On and Power-Off Procedures..................................................................
13.3.11 Power Supply Circuit...........................................................................................
13.3.12 LCD Drive Power Supply Voltages.....................................................................
13.3.13 LCD Voltage Generation Circuit .........................................................................
13.3.14 Contrast Control Circuit.......................................................................................
13.3.15 LCD Drive Bias Selection Circuit .......................................................................
330
331
333
335
336
338
338
339
339
340
340
342
342
343
346
347
349
353
356
358
360
361
362
363
365
373
374
Section 14 Dot Matrix LCD Controller (H8/3854 Group) ......................................
14.1 Overview...........................................................................................................................
14.1.1 Features................................................................................................................
14.1.2 Block Diagram.....................................................................................................
14.1.3 Pin Configuration.................................................................................................
14.1.4 Register Configuration.........................................................................................
14.2 Register Descriptions ........................................................................................................
14.2.1 Index Register (IR) ..............................................................................................
14.2.2 Control Register 1 (LR0) .....................................................................................
14.2.3 Control Register 2 (LR1) .....................................................................................
14.2.4 Address Register (LR2) .......................................................................................
14.2.5 Frame Frequency Setting Register (LR3) ............................................................
375
375
375
376
377
377
378
378
378
379
381
382
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14.2.6 Display Data Register (LR4)................................................................................
14.3 Operation...........................................................................................................................
14.3.1 System Overview .................................................................................................
14.3.2 CPU Interface.......................................................................................................
14.3.3 LCD Drive Pin Functions ....................................................................................
14.3.4 Display Memory Configuration and Display .......................................................
14.3.5 Display Data Output ............................................................................................
14.3.6 Register and Display Memory Access .................................................................
14.3.7 Module Standby Mode.........................................................................................
14.3.8 Power-On and Power-Off Procedures..................................................................
14.3.9 Power Supply Circuit ...........................................................................................
14.3.10 LCD Drive Power Supply Voltages.....................................................................
14.3.11 LCD Voltage Generation Circuit .........................................................................
14.3.12 LCD Drive Bias Selection Circuit........................................................................
383
384
384
385
388
389
390
391
395
396
396
397
399
402
Section 15 Electrical Characteristics (H8/3857 Group) ........................................... 403
15.1 H8/3855, H8/3856, and H8/3857 Absolute Maximum Ratings
(Standard Specifications) ..................................................................................................
15.2 H8/3855, H8/3856, and H8/3857 Electrical Characteristics (Standard Specifications) ....
15.2.1 Power Supply Voltage and Operating Range.......................................................
15.2.2 DC Characteristics ...............................................................................................
15.2.3 AC Characteristics ...............................................................................................
15.2.4 A/D Converter Characteristics .............................................................................
15.2.5 LCD Characteristics.............................................................................................
15.2.6 Flash Memory Characteristics..............................................................................
15.3 Operation Timing..............................................................................................................
15.4 Output Load Circuit ..........................................................................................................
15.5 Usage Note........................................................................................................................
403
404
404
406
411
415
416
418
419
422
422
Section 16 Electrical Characteristics (H8/3854 Group) ........................................... 423
16.1 H8/3852, H8/3853, and H8/3854 Absolute Maximum Ratings
(Standard Specifications) ..................................................................................................
16.2 H8/3852, H8/3853, and H8/3854 Electrical Characteristics (Standard Specifications) ....
16.2.1 Power Supply Voltage and Operating Range.......................................................
16.2.2 DC Characteristics ...............................................................................................
16.2.3 AC Characteristics ...............................................................................................
16.2.4 A/D Converter Characteristics .............................................................................
16.2.5 LCD Characteristics.............................................................................................
16.2.6 Flash Memory Characteristics..............................................................................
16.3 Operation Timing..............................................................................................................
423
424
424
426
431
434
435
436
437
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16.4 Output Load Circuit .......................................................................................................... 438
16.5 Usage Note........................................................................................................................ 439
Appendix A CPU Instruction Set .................................................................................... 441
A.1
A.2
A.3
Instructions........................................................................................................................ 441
Operation Code Map......................................................................................................... 450
Number of Execution States ............................................................................................. 452
Appendix B Internal I/O Registers ................................................................................. 459
B.1
B.2
Register Addresses............................................................................................................
B.1.1 H8/3857 Group Addresses...................................................................................
B.1.2 H8/3854 Group Addresses...................................................................................
Register Descriptions ........................................................................................................
459
459
464
468
Appendix C I/O Port Block Diagrams........................................................................... 508
C.1
C.2
C.3
C.4
C.5
C.6
C.7
C.8
Block Diagram of Port 1 ...................................................................................................
Block Diagram of Port 2 ...................................................................................................
Block Diagram of Port 3 (H8/3857 Group Only)..............................................................
Block Diagram of Port 4 ...................................................................................................
Block Diagram of Port 5 ...................................................................................................
Block Diagram of Port 9 ...................................................................................................
Block Diagram of Port A ..................................................................................................
Block Diagram of Port B ..................................................................................................
508
513
516
520
523
524
525
526
Appendix D Port States in the Different Processing States..................................... 527
Appendix E List of Product Codes ................................................................................. 528
Appendix F Package Dimensions ................................................................................... 529
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1. Overview
Section 1 Overview
1.1
Overview
The H8/300L Series is a series of single-chip microcomputers (MCU: microcomputer unit), built
around the high-speed H8/300L CPU and equipped with peripheral system functions on-chip.
Within the H8/300L Series, the H8/3857 Group and H8/3854 Group feature on-chip liquid crystal
display (LCD) controllers. Other on-chip peripheral functions include a LCD controller, timers,
serial communication interface, and an analog-to-digital (A/D) converter. Together these functions
make the H8/3857 Group and H8/3854 Group ideally suited for embedded control of systems
requiring an LCD display.
The H8/3857 Group comprises the H8/3855, with 40 kbytes of ROM and 2 kbytes of RAM onchip, the H8/3856, with 48 kbytes of ROM and 2 kbytes of RAM, and the H8/3857, with 60
kbytes of ROM and 2 kbytes of RAM. H8/3854 Group mask ROM versions are the H8/3852, with
16 kbytes of ROM and 1 kbyte of RAM on-chip, the H8/3853, with 24 kbytes of ROM and 1
kbyte of RAM, and the H8/3854, with 32 kbytes of ROM and 1 kbyte of RAM.
Two F-ZTAT versions—the H8/3857F and H8/3854F—are also available, with userprogrammable on-chip flash ROM. These models have 60 kbytes of ROM and 2 kbytes of RAM.
Note that the H8/3854 mask ROM and F-ZTAT versions have different ROM and RAM sizes.
Table 1.1 summarizes the features of the H8/3857 Group and H8/3854 Group.
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1. Overview
Table 1.1
Features
Item
Description
CPU
High-speed H8/300L CPU
•
•
•
General-register architecture
General registers: Sixteen 8-bit registers (can be used as eight 16-bit
registers)
Operating speed
⎯ Max. operating speed: 5 MHz
⎯ Add/subtract: 0.4 μs (operating at 5 MHz)
⎯ Multiply/divide: 2.8 μs (operating at 5 MHz)
⎯ Can run on 32.768 kHz subclock
Instruction set compatible with H8/300 CPU
⎯ Instruction length of 2 bytes or 4 bytes
⎯ Basic arithmetic operations between registers
⎯ MOV instruction for data transfer between memory and registers
Typical instructions
•
•
•
•
Interrupts
Multiply (8 bits × 8 bits)
Divide (16 bits ÷ 8 bits)
Bit accumulator
Register-indirect designation of bit position
H8/3857 Group: 29 interrupt sources
• 13 external interrupt sources: IRQ4 to IRQ0, WKP7 to WKP0
• 16 internal interrupt sources
H8/3854 Group: 26 interrupt sources
•
•
12 external interrupt sources: IRQ4, IRQ3, IRQ1, IRQ0, WKP7 to WKP0
14 internal interrupt sources
Clock pulse generators Two on-chip clock pulse generators
•
•
Power-down modes
System clock pulse generator: 1 to 10 MHz
Subclock pulse generator: 32.768 kHz
Six power-down modes
•
•
•
•
•
•
Sleep mode
Standby mode
Watch mode
Subsleep mode
Subactive mode
Active (medium-speed) mode
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1. Overview
Item
Description
Memory
H8/3857 Group
• H8/3855: 40-kbyte ROM, 2-kbyte RAM
• H8/3856: 48-kbyte ROM, 2-kbyte RAM
• H8/3857: 60-kbyte ROM, 2-kbyte RAM
• H8/3857F: 60-kbyte ROM, 2-kbyte RAM
H8/3854 Group
• H8/3852: 16-kbyte ROM, 1-kbyte RAM
• H8/3853: 24-kbyte ROM, 1-kbyte RAM
• H8/3854: 32-kbyte ROM, 1-kbyte RAM
• H8/3854F: 60-kbyte ROM, 2-kbyte RAM
Note that the H8/3854 (mask ROM version) and H8/3854F (F-ZTAT
version) have different ROM and RAM sizes.
I/O ports
H8/3857 Group: 44 I/O port pins
• I/O pins: 35
• Input pins: 9
H8/3854 Group: 29 I/O port pins
•
•
Timers
I/O pins: 24
Input pins: 5
Four on-chip timers (three in the H8/3854 Group)
•
•
•
•
Timer A: 8-bit timer
Count-up timer with selection of eight internal clock signals divided
from the system clock (φ)*1 and four clock signals divided from the
1
watch clock (φw)*
Timer B: 8-bit timer
⎯ Count-up timer with selection of seven internal clock signals or
event input from external pin
⎯ Auto-reloading
Timer C: 8-bit timer (in H8/3857 Group only)
⎯ Count-up/count-down timer with selection of seven internal clock
signals or event input from external pin
⎯ Auto-reloading
Timer F: 16-bit timer
⎯ Can be used as two independent 8-bit timers.
⎯ Count-up timer with selection of four internal clock signals or
event input from external pin
⎯ Compare-match function with toggle output
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1. Overview
Item
Description
Serial communication
interface
H8/3857 Group: Two channels on chip
•
•
SCI1: synchronous serial interface
Choice of 8-bit or 16-bit data transfer
SCI3: 8-bit synchronous or asynchronous serial interface
Built-in function for multiprocessor communication
H8/3854 Group: One channel on chip
•
SCI3: 8-bit synchronous or asynchronous serial interface
Built-in function for multiprocessor communication
14-bit PWM
Pulse-division PWM output for reduced ripple
(in H8/3857 Group only) • Can be used as a 14-bit D/A converter by connecting to an external
low-pass filter.
A/D converter
H8/3857 Group
•
Successive approximations using a resistance ladder resolution:
8 bits
• 8-channel analog input port
• Conversion time: 31/φ or 62/φ per channel
H8/3854 Group
•
•
•
LCD controller
Successive approximations using a resistance ladder resolution:
8 bits
4-channel analog input port
Conversion time: 31/φ or 62/φ per channel
H8/3857 Group: Up to 64 segment pins and 32 common pins
•
Choice of three duty cycles (1/8, 1/16, 1/32)
With 1/8 duty selected: 64 SEG × 8 COM, 40 SEG × 8 COM
With 1/16 duty selected: 56 SEG × 16 COM, 40 SEG × 16 COM
With 1/32 duty selected: 40 SEG × 32 COM
• Built-in 2048-bit display data RAM
• Built-in 2× or 3× LCD step-up circuit
• Built-in contrast control circuit
• Built-in LCD power supply bleeder resistance and voltage follower opamp circuits
H8/3854 Group: 40 segment pins and up to 16 common pins
•
•
•
Choice of two duty cycles (1/8, 1/16)
With 1/8 duty selected: 40 SEG × 8 COM
With 1/16 duty selected: 40 SEG × 16 COM
Built-in 640-bit display data RAM
Built-in LCD power supply bleeder resistance
Rev.3.00 Jul. 19, 2007 page 4 of 532
REJ09B0397-0300
1. Overview
Item
Description
Product lineup
H8/3857 Group
Part No.
Mask ROM
Version
F-ZTAT
Version
Package
ROM/RAM
Size
HD6433855FQ
⎯
144-pin QFP (FP-144H)
ROM: 40 kbytes
HD6433855TG
⎯
144-pin TQFP (TFP-144)
RAM: 2 kbytes
HCD6433855
⎯
Die
HD6433856FQ
⎯
144-pin QFP (FP-144H)
ROM: 48 kbytes
HD6433856TG
⎯
144-pin TQFP (TFP-144)
RAM: 2 kbytes
HCD6433856
⎯
Die
HD6433857FQ
HD64F3857FQ
144-pin QFP (FP-144H)
ROM: 60 kbytes
HD6433857TG
HD64F3857TG
144-pin TQFP (TFP-144)
RAM: 2 kbytes
HCD6433857
HCD64F3857
Die
H8/3854 Group
Part No.
Mask ROM
2
Version*
F-ZTAT
Version
Package
ROM/RAM
Size
HD6433852H
⎯
100-pin QFP (FP-100B)
ROM: 16 kbytes
HD6433852W
⎯
100-pin TQFP (TFP-100G) RAM: 1 kbyte
HCD6433852
⎯
Die
HD6433853H
⎯
100-pin QFP (FP-100B)
HD6433853W
⎯
100-pin TQFP (TFP-100G) RAM: 1 kbyte
HCD6433853
⎯
Die
HD6433854H
⎯
100-pin QFP (FP-100B)
HD6433854W
⎯
100-pin TQFP (TFP-100G) RAM: 1 kbyte
HCD6433854
⎯
Die
⎯
HD64F3854H
100-pin QFP (FP-100B)
⎯
HD64F3854W
100-pin TQFP (TFP-100G) RAM: 2 kbytes
⎯
HCD64F3854
Die
ROM: 24 kbytes
ROM: 32 kbytes
ROM: 60 kbytes
Notes: 1. φ and φw are defined in section 4, Clock Pulse Generators.
2. Under development
Rev.3.00 Jul. 19, 2007 page 5 of 532
REJ09B0397-0300
1. Overview
1.2
Internal Block Diagram
P40/SCK3
P41/RXD
P42/TXD
P43/IRQ0
RES
TEST2
TEST
FWE
VCC
VSS
VSS
Timer B
SCI3
Port 5
SCI1
Data bus (upper)
Timer A
Address bus
X1
X2
Port 1
RAM
Port 2
FLASH/
MASK
ROM
Port B
Timer C
A/D
Timer F
P97
P96
P95
P94
P93
P92
P91
P90
PA3
PA2
PA1
PA0
RS
R/W
STRB
Port A
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Port 9
V5OUT
V4OUT
V3OUT
V2OUT
V1OUT
V4
V34
V3
VLCD
PB7/AN7
PB6/AN6
PB5/AN5
PB4/AN4
PB3/AN3
PB2/AN2
PB1/AN1
PB0/AN0
AVCC
AVSS
Internal
I/O port
VLOUT
C1–
C1+
C2–
C2+
VCi
LCD
···
···
COM29/SEG44
COM30/SEG43
COM31/SEG42
COM32/SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9/SEG64
COM10/SEG63
COM11/SEG62
COM12/SEG61
COM13/SEG60
COM14/SEG59
COM15/SEG58
COM16/SEG57
···
···
Figure 1.1 H8/3857 Group Internal Block Diagram
Rev.3.00 Jul. 19, 2007 page 6 of 532
REJ09B0397-0300
P57/WKP7
P56/WKP6
P55/WKP5
P54/WKP4
P53/WKP3
P52/WKP2
P51/WKP1
P50/WKP0
14-bit
PWM
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
P30/SCK1
P31/SI1
P32/SO1
P33
P34
P35
P36
P37
Port 3
P20/IRQ4/ADTRG
P21/UD
P22
P23
P24
P25
P26
P27
CPU
(8-bit)
Data bus (lower)
Port 4
P10/TMOW
P11/TMOFL
P12/TMOFH
P13
P14/PWM
P15/IRQ1/TMIB
P16/IRQ2/TMIC
P17/IRQ3/TMIF
Subclock
oscillator
System clock
oscillator
OSC1
OSC2
Figures 1.1 and 1.2 show internal block diagrams of the H8/3857 Group and H8/3854 Group.
RES
TEST2
TEST
FWE
VCC
VSS
CPU
(8-bit)
Timer A
Timer B
PB7/AN7
PB6/AN6
PB5/AN5
PB4/AN4
Port 4
A/D
Internal
I/O port
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
RS
R/W
STRB
PA3
PA2
PA1
PA0
Port A
P97
P96
P95
P94
P93
P92
P91
P90
Port 9
LCD
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
...
...
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
V1OUT
V2OUT
V3OUT
V4OUT
V5OUT
P57/WKP7
P56/WKP6
P55/WKP5
P54/WKP4
P53/WKP3
P52/WKP2
P51/WKP1
P50/WKP0
SCI3
Timer F
P40/SCK3
P41/RXD
P42/TXD
P43/IRQ0
Port 5
Data bus (upper)
RAM
Port B
P20/IRQ4/ADTRG
P21
P22
P23
P24
P25
P26
P27
FLASH/
MASK
ROM
Port 2
P10/TMOW
P11/TMOFL
P12/TMOFH
P15/IRQ1/TMIB
P17/IRQ3/TMIF
Port 1
Data bus (lower)
Address bus
X1
X2
Subclock
oscillator
System clock
oscillator
OSC1
OSC2
1. Overview
Figure 1.2 H8/3854 Group Internal Block Diagram
Rev.3.00 Jul. 19, 2007 page 7 of 532
REJ09B0397-0300
1. Overview
1.3
Pin Arrangement and Functions
1.3.1
Pin Arrangement
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
H8/3857
(Top view)
FP-144H
TFP-144
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
COM16/SEG57
COM15/SEG58
COM14/SEG59
COM13/SEG60
COM12/SEG61
COM11/SEG62
COM10/SEG63
COM9/SEG64
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
P57/WKP7
P56/WKP6
P55/WKP5
P54/WKP4
P53/WKP3
P52/WKP2
P51/WKP1
P50/WKP0
P27
P26
P25
P24
P23
P22
P21/UD
P20/IRQ4/ADTRG
AVCC
PB0/AN0
PB1/AN1
PB2/AN2
PB3/AN3
PB4/AN4
PB5/AN5
PB6/AN6
PB7/AN7
AVSS
X2
X1
VSS
OSC2
OSC1
TEST
TEST2
VCC
RES
FWE
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
31
32
33
34
35
36
V5OUT
V4OUT
V3OUT
V2OUT
V1OUT
V4
V34
V3
VCi
C2–
C2+
C1–
C1+
VLOUT
VLCD
VSS
P37
P36
P35
P34
P33
P32/SO1
P31/SI1
P30/SCK1
P17/IRQ3/TMIF
P16/IRQ2/TMIC
P15/IRQ1/TMIB
P14/PWM
P13
P12/TMOFH
P11/TMOFL
P10/TMOW
P43/IRQ0
P42/TXD
P41/RXD
P40/SCK3
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
COM17/SEG56
COM18/SEG55
COM19/SEG54
COM20/SEG53
COM21/SEG52
COM22/SEG51
COM23/SEG50
COM24/SEG49
COM25/SEG48
COM26/SEG47
COM27/SEG46
COM28/SEG45
COM29/SEG44
COM30/SEG43
COM31/SEG42
COM32/SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
The pin arrangements of the H8/3857 Group and H8/3854 Group are shown in figures 1.3 and 1.4.
The HCD64F3857 pad layout is shown in figure 1.5, and the pad coordinates in table 1.2; the
HCD6433855, HCD6433856, and HCD6433857 pad layout is shown in figure 1.6, and the pad
coordinates in table 1.3; the HCD64F3854 pad layout is shown in figure 1.7, and the pad
coordinates in table 1.4; and the HCD6433852, HCD6433853, and HCD6433854 pad layout is
shown in figure 1.8, and the pad coordinates in table 1.5.
Figure 1.3 H8/3857 Group Pin Arrangement (FP-144H, TFP-144: Top View)
Rev.3.00 Jul. 19, 2007 page 8 of 532
REJ09B0397-0300
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
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
1. Overview
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
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
H8/3854
(Top view)
FP-100B
TFP-100G
SEG5
SEG4
SEG3
SEG2
SEG1
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
PB7/AN7
PB6/AN6
PB5/AN5
PB4/AN4
P56/WKP6
P55/WKP5
P54/WKP4
P53/WKP3
P52/WKP2
P51/WKP1
P50/WKP0
P27
P26
P25
P24
P23
P22
P21
P20/IRQ4/ADTRG
TEST2
X2
X1
VSS
OSC2
OSC1
TEST
VCC
RES
FWE
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
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
V5OUT
V4OUT
V3OUT
V2OUT
V1OUT
P17/IRQ3/TMIF
P15/IRQ1/TMIB
P12/TMOFH
P11/TMOFL
P10/TMOW
P43/IRQ0
P42/TXD
P41/RXD
P40/SCK3
P57/WKP7
Figure 1.4 H8/3854 Group Pin Arrangement (FP-100B, TFP-100G: Top View)
Rev.3.00 Jul. 19, 2007 page 9 of 532
REJ09B0397-0300
1. Overview
Y
144 142 140 138 136 134 132 130 128 126 124 122 120 118 116 114 112 110
143 141 139 137 135 133 131 129 127 125 123 121 119 117 115 113 111 109
1
2
3
4
4-2
5
5-2
6
6-2
Model
7
7-2
8
9
10
11
12
13
14
15
(0, 0)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36 37 39 41 43 45
71
47 49 51
53
55 57
59 61 63 65 67 69
38 40 42 44 46
48 50 52 54
56 58
60 62 64 66 68 70
72
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
Model: HD64F3857
Chip size: 7.08 mm × 7.31 mm
Figure 1.5 Pad Layout of HCD64F3857 (F-ZTAT Version) (Top View)
Rev.3.00 Jul. 19, 2007 page 10 of 532
REJ09B0397-0300
X
1. Overview
Table 1.2
HCD64F3857 Pad Coordinates
Coordinates*1
Coordinates*1
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
P57 /WKP7
−3348
2928
32
P56 /WKP6
−3348
2784
33
3
P55 /WKP5
−3348
2640
4
P54 /WKP4
−3348
2506
4-2
NC4*2
−3348
5
P53 /WKP3
5-2
NC3*2
6
P52 /WKP2
6-2
NC2*2
−3348
1720
40
COM4
−2374
−3463
75
SEG23
3348
−2587
7
P51 /WKP1
−3348
1590
41
COM5
−2210
−3463
76
SEG24
3348
−2427
7-2
NC1*2
−3348
1456
42
COM6
−2046
−3463
77
SEG25
3348
−2267
8
P50 /WKP0
−3348
1316
43
COM7
−1884
−3463
78
SEG26
3348
−2107
9
P27
−3348
1173
44
COM8
−1720
−3463
79
SEG27
3348
−1947
10
P26
−3348
1039
45
COM9/SEG64
−1556
−3463
80
SEG28
3348
−1787
11
P25
−3348
905
46
COM10/SEG63
−1394
−3463
81
SEG29
3348
−1627
12
P24
−3348
771
47
COM11/SEG62
−1231
−3463
82
SEG30
3348
−1467
13
P23
−3348
637
48
COM12/SEG61
−1069
−3463
83
SEG31
3348
−1307
14
P22
−3348
503
49
COM13/SEG60
−905
−3463
84
SEG32
3348
−1148
15
P21 /UD
−3348
369
50
COM14/SEG59
−741
−3463
85
SEG33
3348
−988
16
P20 /IRQ4 /ADTRG −3348
235
51
COM15/SEG58
−579
−3463
86
SEG34
3348
−828
17
AVCC
−3348
22
52
COM16/SEG57
−415
−3463
87
SEG35
3348
−668
18
PB0 /AN0
−3348
−143
53
SEG1
−251
−3463
88
SEG36
3348
−508
19
PB1 /AN1
−3348
−273
54
SEG2
−89
−3463
89
SEG37
3348
−348
20
PB2 /AN2
−3348
−403
55
SEG3
75
−3463
90
SEG38
3348
−188
21
PB3 /AN3
−3348
−533
56
SEG4
237
−3463
91
SEG39
3348
−28
22
PB4 /AN4
−3348
−663
57
SEG5
401
−3463
92
SEG40
3348
132
23
PB5 /AN5
−3348
−793
58
SEG6
565
−3463
93
COM32/SEG41
3348
292
24
PB6 /AN6
−3348
−923
59
SEG7
727
−3463
94
COM31/SEG42
3348
452
25
PB7 /AN7
−3348
−1053
60
SEG8
891
−3463
95
COM30/SEG43
3348
612
26
AVSS
−3348
−1228
61
SEG9
1055
−3463
96
COM29/SEG44
3348
772
27
X2
−3348
−1438
62
SEG10
1217
−3463
97
COM28/SEG45
3348
932
28
X1
−3348
−1568
63
SEG11
1380
−3463
98
COM27/SEG46
3348
1092
29
VSS
−3348
−1763
64
SEG12
1542
−3463
99
COM26/SEG47
3348
1252
30
OSC2
−3348
−1981
65
SEG13
1706
−3463
100 COM25/SEG48
3348
1411
31
OSC1
−3348
−2134
66
SEG14
1870
−3463
101 COM24/SEG49
3348
1571
Pad
No. Pad Name
1
2
X (μm) Y (μm)
Pad
No. Pad Name
X (μm) Y (μm)
TEST
−3348
−2264
67
SEG15
2032
−3463
TEST2
−3348
−2404
68
SEG16
2196
−3463
34
VCC
−3348
−2599
69
SEG17
2360
−3463
35
RES
−3348
−2794
70
SEG18
2522
−3463
2372
36
FWE
−3348
−2944
71
SEG19
2686
−3463
−3348
2238
37
COM1
−2862
−3463
72
SEG20
2848
−3463
−3348
2044
38
COM2
−2700
−3463
73
SEG21
3348
−2907
−3348
1854
39
COM3
−2536
−3463
74
SEG22
3348
−2747
Rev.3.00 Jul. 19, 2007 page 11 of 532
REJ09B0397-0300
1. Overview
Coordinates*1
Coordinates*1
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
X (μm) Y (μm)
Pad
No. Pad Name
102 COM23/SEG50
3348
1731
117 Vci
1471
3463
132 P30 /SCK1
−982
3463
103 COM22/SEG51
3348
2063
118 C2–
1341
3463
133 P17 /IRQ3/TMIF
−1116
3463
104 COM21/SEG52
3348
2223
119 C2+
1125
3463
134 P16 /IRQ2/TMIC
−1250
3463
105 COM20/SEG53
3348
2383
120 C1–
925
3463
135 P15 /IRQ1/TMIB
−1383
3463
106 COM19/SEG54
3348
2543
121 C1+
747
3463
136 P14 /PWM
−1611
3463
107 COM18/SEG55
3348
2703
122 VLOUT
569
3463
137 P13
−1761
3463
108 COM17/SEG56
3348
2863
123 VLCD
395
3463
138 P12 /TMOFH
−1911
3463
109 V5OUT
2776
3463
124 VSS
226
3463
139 P11 /TMOFL
−2045
3463
110 V4OUT
2616
3463
125 P37
74
3463
140 P10 /TMOW
−2180
3463
111 V3OUT
2456
3463
126 P36
−78
3463
141 P43 /IRQ0
−2447
3463
112 V2OUT
2296
3463
127 P35
−234
3463
142 P42 /TXD
−2587
3463
113 V1OUT
2136
3463
128 P34
−386
3463
143 P41 /RXD
−2737
3463
114 V4
1976
3463
129 P33
−538
3463
144 P40 /SCK3
−2888
3463
Pad
No. Pad Name
115 V34
1816
3463
130 P32 /SO1
−690
3463
116 V3
1656
3463
131 P31 /Sl1
−848
3463
X (μm) Y (μm)
Notes: 1. Numbers indicate coordinates at the center of the pad area, with an accuracy of ±5 μm.
The origin is the center of the chip, and the center is at a point halfway between pads,
horizontally and vertically.
2. NC1 to NC4 are test pads; they should be left open.
Rev.3.00 Jul. 19, 2007 page 12 of 532
REJ09B0397-0300
1. Overview
Y
144 142 140 138 136 134 132 130 128 126 124 122 120 118 116 114 112 110
143 141 139 137 135 133 131 129 127 125 123 121 119 117 115 113 111 109
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
31
32
33
34
35
36
Model
(0, 0)
37 39 41 43 45
47 49 51
53
38 40 42 44 46
48 50 52 54
55
57
56
59
58
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
X
61 63 65 67 69
71
60 62 64 66 68 70
72
Model: HD643385rccc
r: Number denoting to ROM size
7: 60-kbyte version
6: 48-kbyte version
5: 40-kbyte version
ccc: ROM code
Chip size: 6.21 mm × 6.21 mm
Figure 1.6 Pad Layout of HCD6433855, HCD6433856, and HCD6433857
(Mask ROM Version) (Top View)
Rev.3.00 Jul. 19, 2007 page 13 of 532
REJ09B0397-0300
1. Overview
Table 1.3
HCD6433855, HCD6433856, and HCD6433857 Pad Coordinates
Coordinates*1
Coordinates*1
X (μm) Y (μm)
36
2
FWE*
−2913
−2534
71
SEG19
2305
−2913
37
COM1
−2495
−2913
72
SEG20
2495
−2913
2215
38
COM2
−2305
−2913
73
SEG21
2913
−2495
2070
39
COM3
−2125
−2913
74
SEG22
2913
−2305
−2913
1930
40
COM4
−1955
−2913
75
SEG23
2913
−2125
P52 /WKP2
−2913
1795
41
COM5
−1795
−2913
76
SEG24
2913
−1955
P51 /WKP1
−2913
1660
42
COM6
−1645
−2913
77
SEG25
2913
−1795
8
P50 /WKP0
−2913
1530
43
COM7
−1505
−2913
78
SEG26
2913
−1645
9
P27
−2913
1400
44
COM8
−1365
−2913
79
SEG27
2913
−1505
10
P26
−2913
1271
45
COM9/SEG64
−1235
−2913
80
SEG28
2913
−1365
11
P25
−2913
1141
46
COM10/SEG63
−1105
−2913
81
SEG29
2913
−1235
12
P24
−2913
1011
47
COM11/SEG62
−975
−2913
82
SEG30
2913
−1105
13
P23
−2913
881
48
COM12/SEG61
−845
−2913
83
SEG31
2913
−975
14
P22
−2913
751
49
COM13/SEG60
−715
−2913
84
SEG32
2913
−845
15
P21 /UD
−2913
621
50
COM14/SEG59
−585
−2913
85
SEG33
2913
−715
16
P20 /IRQ4 /ADTRG −2913
491
51
COM15/SEG58
−455
−2913
86
SEG34
2913
−585
17
AVCC
−2913
290
52
COM16/SEG57
−325
−2913
87
SEG35
2913
−455
18
PB0 /AN0
−2913
125
53
SEG1
−195
−2913
88
SEG36
2913
−325
19
PB1 /AN1
−2913
−5
54
SEG2
−65
−2913
89
SEG37
2913
−195
20
PB2 /AN2
−2913
−135
55
SEG3
65
−2913
90
SEG38
2913
−65
21
PB3 /AN3
−2913
−265
56
SEG4
195
−2913
91
SEG39
2913
65
22
PB4 /AN4
−2913
−395
57
SEG5
325
−2913
92
SEG40
2913
195
23
PB5 /AN5
−2913
−525
58
SEG6
455
−2913
93
COM32/SEG41
2913
325
24
PB6 /AN6
−2913
−655
59
SEG7
585
−2913
94
COM31/SEG42
2913
455
25
PB7 /AN7
−2913
−785
60
SEG8
715
−2913
95
COM30/SEG43
2913
585
26
AVSS
−2913
−960
61
SEG9
845
−2913
96
COM29/SEG44
2913
715
27
X2
−2913
−1169
62
SEG10
975
−2913
97
COM28/SEG45
2913
845
28
X1
−2913
−1299
63
SEG11
1105
−2913
98
COM27/SEG46
2913
975
29
VSS
−2913
−1428
64
SEG12
1235
−2913
99
COM26/SEG47
2913
1105
30
OSC2
−2913
−1581
65
SEG13
1365
−2913
100 COM25/SEG48
2913
1235
31
OSC1
−2913
−1734
66
SEG14
1505
−2913
101 COM24/SEG49
2913
1365
32
TEST
−2913
−1874
67
SEG15
1645
−2913
102 COM23/SEG50
2913
1505
33
TEST2
−2913
−2024
68
SEG16
1795
−2913
103 COM22/SEG51
2913
1645
34
VCC
−2913
−2189
69
SEG17
1955
−2913
104 COM21/SEG52
2913
1795
35
RES
−2913
−2384
70
SEG18
2125
−2913
105 COM20/SEG53
2913
1955
X (μm) Y (μm)
1
P57 /WKP7
−2913
2515
2
P56 /WKP6
−2913
2365
3
P55 /WKP5
−2913
4
P54 /WKP4
−2913
5
P53 /WKP3
6
7
Pad
No. Pad Name
Coordinates*1
Pad
No. Pad Name
Pad
No. Pad Name
Rev.3.00 Jul. 19, 2007 page 14 of 532
REJ09B0397-0300
X (μm) Y (μm)
1. Overview
Coordinates*1
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
106 COM19/SEG54
2913
2125
119 C2+
995
2913
132 P30 /SCK1
−715
2913
107 COM18/SEG55
2913
2305
120 C1–
865
2913
133 P17 /IRQ3/TMIF
−845
2913
108 COM17/SEG56
2913
2495
121 C1+
735
2913
134 P16 /IRQ2/TMIC
−975
2913
109 V5OUT
2435
2913
122 VLOUT
605
2913
135 P15 /IRQ1/TMIB
−1105
2913
110 V4OUT
2275
2913
123 VLCD
475
2913
136 P14 /PWM
−1235
2913
111 V3OUT
2125
2913
124 VSS
325
2913
137 P13
−1365
2913
112 V2OUT
1975
2913
125 P37
195
2913
138 P12 /TMOFH
−1505
2913
113 V1OUT
1825
2913
126 P36
65
2913
139 P11 /TMOFL
−1645
2913
114 V4
1675
2913
127 P35
−65
2913
140 P10 /TMOW
−1795
2913
115 V34
1520
2913
128 P34
−195
2913
141 P43 /IRQ0
−1955
2913
116 V3
1385
2913
129 P33
−325
2913
142 P42 /TXD
−2125
2913
117 Vci
1255
2913
130 P32 /SO1
−455
2913
143 P41 /RXD
−2305
2913
118 C2–
1125
2913
131 P31 /Sl1
−585
2913
144 P40 /SCK3
−2495
2913
X (μm) Y (μm)
Pad
No. Pad Name
Coordinates*1
Pad
No. Pad Name
X (μm) Y (μm)
Notes: 1. Numbers indicate coordinates at the center of the pad area, with an accuracy of ±5 μm.
The origin is the center of the chip, and the center is at a point halfway between pads,
horizontally and vertically.
2. Connect FWE to VSS.
Rev.3.00 Jul. 19, 2007 page 15 of 532
REJ09B0397-0300
1. Overview
Y
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
75
74
73
1
2
2-2
3
4
5
5-2
6
6-2
7
8
9
10
11
12
13
14
15
16
17
18
19-1
19-2
20
21
22
23
24
25
Model
(0, 0)
62
61
60
59
58
57
56
55
54
53
52
51
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
Model: HD64F3854
Chip size: 6.34 mm × 6.34 mm
Figure 1.7 Pad Layout of HCD64F3854 (F-ZTAT Version) (Top View)
Rev.3.00 Jul. 19, 2007 page 16 of 532
REJ09B0397-0300
72
71
70
69
68
67
66
65
64
63
X
1. Overview
Table 1.4
HCD64F3854 Pad Coordinates
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
−2985
2494
31
COM2
−2985
2333
32
COM3
NC1*2
−2985
2139
33
3
P54 /WKP4
−2985
1950
4
P53 /WKP3
−2985
5
P52 /WKP2
−2985
5-2
NC2*2
6
P51 /WKP1
6-2
NC3*2
7
P50 /WKP0
8
P27
9
P26
10
Coordinates*1
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
X (μm) Y (μm)
−1413
−2985
66
SEG21
2985
627
−1210
−2985
67
SEG22
2985
831
COM4
−1006
−2985
68
SEG23
2985
1036
34
COM5
−801
−2985
69
SEG24
2985
1240
1788
35
COM6
−597
−2985
70
SEG25
2985
1443
1626
36
COM7
−393
−2985
71
SEG26
2985
1647
−2985
1419
37
COM8
−189
−2985
72
SEG27
2985
1851
−2985
1215
38
COM9
16
−2985
73
SEG28
2985
2055
−2985
1054
39
COM10
219
−2985
74
SEG29
2985
2259
−2985
897
40
COM11
423
−2985
75
SEG30
2985
2463
−2985
735
41
COM12
627
−2985
76
SEG31
2435
2985
−2985
573
42
COM13
831
−2985
77
SEG32
2234
2985
P25
−2985
412
43
COM14
1035
−2985
78
SEG33
2032
2985
11
P24
−2985
250
44
COM15
1240
−2985
79
SEG34
1830
2985
12
P23
−2985
88
45
COM16
1443
−2985
80
SEG35
1629
2985
13
P22
−2985
−73
46
SEG1
1647
−2985
81
SEG36
1427
2985
14
P21
−2985
−234
47
SEG2
1851
−2985
82
SEG37
1226
2985
15
P20 /IRQ4 /ADTRG −2985
−396
48
SEG3
2055
−2985
83
SEG38
1025
2985
16
TEST2
−2985
−558
49
SEG4
2259
−2985
84
SEG39
823
2985
17
X2
−2985
−716
50
SEG5
2463
−2985
85
SEG40
621
2985
18
X1
Pad
No. Pad Name
1
P56 /WKP6
2
P55 /WKP5
2-2
−2985
−873
51
SEG6
2985
−2433
86
V5OUT
434
2985
19-1 VSS*3
−2985
−1031
52
SEG7
2985
−2229
87
V4OUT
233
2985
19-2 VSS*3
−2985
−1267
53
SEG8
2985
−2025
88
V3OUT
31
2985
20
OSC2
−2985
−1526
54
SEG9
2985
−1821
89
V2OUT
−171
2985
21
OSC1
−2985
−1707
55
SEG10
2985
−1617
90
V1OUT
−372
2985
22
TEST
−2985
−1864
56
SEG11
2985
−1413
91
P17 /IRQ3 /TMIF
−574
2985
23
VCC
−2985
−2101
57
SEG12
2985
−1210
92
P15 /IRQ1 /TMIB
−780
2985
24
RES
−2985
−2336
58
SEG13
2985
−1005
93
P12 /TMOFH
−985
2985
25
FWE
−2985
−2494
59
SEG14
2985
−801
94
P11 /TMOFL
−1191
2985
26
PB4 /AN4
−2448
−2985
60
SEG15
2985
−597
95
P10 /TMOW
−1396
2985
27
PB5 /AN5
−2244
−2985
61
SEG16
2985
−393
96
P43 /IRQ0
−1618
2985
28
PB6 /AN6
−2040
−2985
62
SEG17
2985
−189
97
P42 /TXD
−1820
2985
29
PB7 /AN7
−1836
−2985
63
SEG18
2985
15
98
P41 /RXD
−2022
2985
30
COM1
−1617
−2985
64
SEG19
2985
219
99
P40 /SCK3
−2234
2985
65
SEG20
2985
423
100 P57 /WKP7
−2446
2985
Notes: 1. Numbers indicate coordinates at the center of the pad area, with an accuracy of ±5 μm.
The origin is the center of the chip, and the center is at a point halfway between pads,
horizontally and vertically.
2. NC1 to NC3 are test pads; they should be left open.
3. Connect both 19-1 and 19-2 to VSS.
Rev.3.00 Jul. 19, 2007 page 17 of 532
REJ09B0397-0300
1. Overview
Y
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
1
75
2
74
3
73
4
Model
72
5
71
6
70
7
69
8
68
9
67
10
66
11
65
12
64
13
63
(0, 0)
14
X
62
15
61
16
60
17
59
18
58
19
57
20
56
21
55
22
54
23
53
24
52
25
51
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
Model: HD643385rccc
r: Number denoting to ROM size
4: 32-kbyte version
3: 24-kbyte version
2: 16-kbyte version
ccc: ROM code
Chip size: 4.69 mm × 4.69 mm
Figure 1.8 Pad Layout of HCD6433854, HCD6433853, and HCD6433852
(Mask ROM Version) (Top View)
Rev.3.00 Jul. 19, 2007 page 18 of 532
REJ09B0397-0300
1. Overview
Table 1.5
Pad
No. Pad Name
HCD6433852, HCD6433853, and HCD6433854 Pad Coordinates
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
Coordinates*1
X (μm) Y (μm)
Pad
No. Pad Name
Coordinates*1
X (μm) Y (μm)
1
P56 /WKP6
−2161
1738
35
COM6
−390
−2161
68
SEG23
2161
650
2
P55 /WKP5
−2161
1590
36
COM7
−260
−2161
69
SEG24
2161
780
3
P54 /WKP4
−2161
1445
37
COM8
−130
−2161
70
SEG25
2161
910
4
P53 /WKP3
−2161
1305
38
COM9
0
−2161
71
SEG26
2161
1060
5
P52 /WKP2
−2161
1171
39
COM10
130
−2161
72
SEG27
2161
1213
6
P51 /WKP1
−2161
1041
40
COM11
260
−2161
73
SEG28
2161
1383
7
P50 /WKP0
−2161
911
41
COM12
390
−2161
74
SEG29
2161
1551
8
P27
−2161
781
42
COM13
520
−2161
75
SEG30
2161
1721
9
P26
−2161
651
43
COM14
650
−2161
76
SEG31
1716
2161
10
P25
−2161
521
44
COM15
780
−2161
77
SEG32
1565
2161
11
P24
−2161
391
45
COM16
910
−2161
78
SEG33
1422
2161
12
P23
−2161
261
46
SEG1
1060
−2161
79
SEG34
1282
2161
13
P22
−2161
131
47
SEG2
1213
−2161
80
SEG35
1150
2161
14
P21
−2161
1
48
SEG3
1383
−2161
81
SEG36
1020
2161
2161
15
P20 /IRQ4 /ADTRG −2161
−129
49
SEG4
1551
−2161
82
SEG37
890
16
TEST2
−2161
−259
50
SEG5
1721
−2161
83
SEG38
760
2161
17
X2
−2161
−389
51
SEG6
2161
−1721
84
SEG39
630
2161
18
X1
−2161
−519
52
SEG7
2161
−1551
85
SEG40
500
2161
19
VSS
−2161
−764
53
SEG8
2161
−1383
86
V5OUT
197
2161
20
OSC2
−2161
−1020
54
SEG9
2161
−1213
87
V4OUT
67
2161
21
OSC1
−2161
−1173
55
SEG10
2161
−1060
88
V3OUT
−63
2161
22
TEST
−2161
−1312
56
SEG11
2161
−910
89
V2OUT
−193
2161
23
VCC
−2161
−1497
57
SEG12
2161
−780
90
V1OUT
−323
2161
24
RES
−2161
−1657
58
SEG13
2161
−650
91
P17 /IRQ3 /TMIF
−453
2161
25
FWE*2
−2161
−1821
59
SEG14
2161
−520
92
P15 /IRQ1 /TMIB
−583
2161
26
PB4 /AN4
−1722
−2161
60
SEG15
2161
−390
93
P12 /TMOFH
−713
2161
27
PB5 /AN5
−1552
−2161
61
SEG16
2161
−260
94
P11 /TMOFL
−843
2161
28
PB6 /AN6
−1395
−2161
62
SEG17
2161
−130
95
P10 /TMOW
−973
2161
29
PB7 /AN7
−1236
−2161
63
SEG18
2161
0
96
P43 /IRQ0
−1104
2161
30
COM1
−1060
−2161
64
SEG19
2161
130
97
P42 /TXD
−1244
2161
31
COM2
−910
−2161
65
SEG20
2161
260
98
P41 /RXD
−1383
2161
32
COM3
−780
−2161
66
SEG21
2161
390
99
P40 /SCK3
−1534
2161
33
COM4
−650
−2161
67
SEG22
2161
520
100 P57 /WKP7
−1698
2161
34
COM5
−520
−2161
Notes: 1. Numbers indicate coordinates at the center of the pad area, with an accuracy of ±5 μm.
The origin is the center of the chip, and the center is at a point halfway between pads,
horizontally and vertically.
2. Connect FWE to VSS.
Rev.3.00 Jul. 19, 2007 page 19 of 532
REJ09B0397-0300
1. Overview
1.3.2
Pin Functions
Table 1.6 outlines the pin functions of the H8/3857 Group.
Table 1.6
Pin Functions
H8/3857 Group
Pin No.
H8/3854 Group
Pin No.
Type
Symbol
FP-144H
TFP-144
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
Power
source
pins
VCC
34
34
23
23
Input
Power supply: All VCC pins
should be connected to the
system power supply (+5 V)
VSS
29, 124
29, 124
19
19-1,
19-2
Input
Ground: All VSS pins should
be connected to the system
power supply (0 V)
AVCC
17
17
⎯
⎯
Input
Analog power supply
(H8/3857 Group only): This
is the power supply pin for
the A/D converter. When the
A/D converter is not used,
connect this pin to the
system power supply (+5 V).
AVSS
26
26
⎯
⎯
Input
Analog ground (H8/3857
Group only): This is the
A/D converter ground pin. It
should be connected to the
system power supply (0 V).
OSC1
31
31
21
21
Input
This pin connects to a
crystal or ceramic oscillator.
OSC2
30
30
20
20
Output
See section 4, Clock Pulse
Generators, for a typical
connection diagram.
X1
28
28
18
18
Input
This pin connects to a
32.768-kHz crystal
oscillator, or can be used to
input an external clock.
X2
27
27
17
17
Output
See section 4, Clock Pulse
Generators, for a typical
connection diagram.
Clock
pins
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1. Overview
H8/3857 Group
Pin No.
H8/3854 Group
Pin No.
Type
Symbol
FP-144H
TFP-144
System
control
RES
35
35
24
24
Input
Reset: When this pin is
driven low, the chip is reset
FWE
36
36
25
25
Input
Flash write enable: This
pin enables or disables flash
memory programming. In
the mask ROM version,
ground this pin to the VSS
potential.
TEST
32
32
22
22
Input
Test: This is a test pin, not
for use in application
systems. It should be
connected to VSS.
TEST2
33
33
16
16
Input
Test pin: This pin sets the
flash memory operating
mode. In the mask ROM
version, ground this pin to
the VSS potential.
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
141
135
134
133
16
141
135
134
133
16
96
92
⎯
91
15
96
92
⎯
91
15
Input
External interrupt request
4 to 0 (H8/3857 Group)
WKP7 to
WKP0
1 to 8
1 to 8
100,
1 to 7
100,
1 to 7
Input
Wakeup interrupt request
0 to 7: These are input pins
for external interrupts that
are detected at the falling
edge
TMOW
140
140
95
95
Output
Clock output: This is an
output pin for waveforms
generated by the timer A
output circuit
TMIB
135
135
92
92
Input
Timer B event counter
input: This is
an event input pin for input
to the timer B counter
TMIC
134
134
⎯
⎯
Input
Timer C event counter
input (H8/3857 Group
only): This is an event input
pin for input to the timer C
counter
Interrupt
pins
Timer
pins
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
External interrupt request
4, 3, 1, 0 (H8/3854 Group)
These are input pins for
external interrupts for which
there is a choice between
rising and falling edge
sensing.
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1. Overview
H8/3857 Group
Pin No.
H8/3854 Group
Pin No.
Type
Symbol
FP-144H
TFP-144
Timer
pins
UD
15
15
⎯
⎯
Input
Timer C up/down select
(H8/3857 Group only): This
pin selects whether the
timer C counter is used for
up- or down-counting. At
high level it selects upcounting, and at low level
down-counting.
TMIF
133
133
91
91
Input
Timer F event counter
input: This is an event input
pin for input to the timer F
counter
TMOFL
139
139
94
94
Output
Timer FL output: This is an
output pin for waveforms
generated by the timer FL
output compare function
TMOFH
138
138
93
93
Output
Timer FH output: This is an
output pin for waveforms
generated by the timer FH
output compare function
PWM
136
136
⎯
⎯
Output
14-bit PWM output
(H8/3857 Group only): This
is an output pin for
waveforms generated by the
14-bit PWM
25 to 22
21 to 18
25 to 22
21 to 18
29 to 26
⎯
29 to 26
⎯
Input
Port B: This is an 8-bit input
port in the H8/3857 Group,
and a 4-bit input port in the
H8/3854 Group
P43
141
141
96
96
Input
Port 4 (bit 3): This is a 1-bit
input port
P42 to P40
142 to 144 142 to 144
97 to 99
97 to 99
I/O
Port 4 (bits 2 to 0): This is
a 3-bit I/O port. Input or
output can be designated for
each bit by means of port
control register 4 (PCR4).
P17,
P16,
P15,
P14, P13,
P12 to P10
133
134
135
136, 137
138 to 140
133
134
135
136, 137
138 to 140
91
⎯
92
⎯
93 to 95
91
⎯
92
⎯
93 to 95
I/O
Port 1: This is an 8-bit I/O
port in the H8/3857 Group,
and a 5-bit I/O port in the
H8/3854 Group. Input or
output can be designated for
each bit by means of port
control register 1 (PCR1).
14-bit
PWM
pin
I/O ports PB7 to PB4
PB3 to PB0
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
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1. Overview
H8/3857 Group
Pin No.
Type
Symbol
I/O ports P27 to P20
FP-144H
TFP-144
9 to 16
H8/3854 Group
Pin No.
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
9 to 16
8 to 15
8 to 15
I/O
Port 2: This is an 8-bit I/O
port. Input or output can be
designated for each bit by
means of port control
register 2 (PCR2).
P37 to P30
125 to 132 125 to 132
⎯
⎯
I/O
Port 3 (H8/3857 Group
only): This is an 8-bit I/O
port. Input or output can be
designated for each bit by
means of port control
register 3 (PCR3).
P57 to P50
1 to 8
1 to 8
100,
1 to 7
100,
1 to 7
I/O
Port 5: This is an 8-bit I/O
port. Input or output can be
designated for each bit by
means of port control
register 5 (PCR5).
Internal PA3 to PA0
I/O ports
⎯
⎯
⎯
⎯
I/O
Port A: This is a 4-bit I/O
port. Input or output can be
designated for each bit by
means of port control
register A (PCRA). PA2 to
PA0 are connected internally
to LCD pins RS, R/W, and
STRB.
P97 to P90
⎯
⎯
⎯
⎯
I/O
Port 9: This is an 8-bit I/O
port. Input or output can be
designated for each bit by
means of port control
register 9 (PCR9). P97 to
P90 are connected internally
to LCD pins DB7 to DB0.
131
131
⎯
⎯
Input
SCI1 receive data input
(H8/3857 Group only): This
is the SCI1 data input pin
130
130
⎯
⎯
Output
SCI1 send data output
(H8/3857 Group only): This
is the SCI1 data output pin
SCK1
132
132
⎯
⎯
I/O
SCI1 clock I/O (H8/3857
Group only): This is the
SCI1 clock I/O pin
RXD
143
143
98
98
Input
SCI3 receive data input:
This is the SCI3 data input
pin
SI1
Serial
communication
interface
SO1
(SCI)
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1. Overview
H8/3857 Group
Pin No.
Pin No.
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
142
142
97
97
Output
SCI3 send data output:
This is the SCI3 data output
pin
144
144
99
99
I/O
SCI3 clock I/O : This is the
SCI3 clock I/O pin
25 to 22
21 to 18
29 to 26
⎯
29 to 26
⎯
Input
Analog input (channels 7
to 0 in H8/3857 Group,
channels 7 to 4 in H8/3854
Group): These are analog
data input channels to the
A/D converter
16
16
15
15
Input
A/D converter trigger
input: This is the external
trigger input pin to the A/D
converter
LCD
COM32 to
controller COM17
COM16 to
COM1
93 to 108
93 to 108
⎯
⎯
Output
52 to 37
52 to 37
45 to 30
45 to 30
LCD common output:
These are LCD common
output pins. The maximum
number of pins is 32 in the
H8/3857 Group, and 16 in
the H8/3854 Group. In
standby mode and module
standby mode, all pins
output the VSS level.
SEG64 to
SEG41
SEG40 to
SEG1
45 to 52
108 to 93,
92 to 53
45 to 52
108 to 93,
92 to 53
⎯
⎯
Output
85 to 46
85 to 46
LCD segment output:
These are LCD segment
output pins. The maximum
number of pins is 64 in the
H8/3857 Group, and 40 in
the H8/3854 Group. In
standby mode and module
standby mode, all pins
output the VSS level.
V3, V4
116, 114
116, 114
⎯
⎯
Input
LCD bias setting pins
(H8/3857 Group only): 1/4
bias drive is selected when
V3 and V4 are shorted, and
1/5 bias drive when V3 and
V4 are left open.
V34
115
115
⎯
⎯
Input
LCD test pin (H8/3857
Group only): This is the
LCD built-in resistance test
pin. V3 and V34 must be
shorted.
Type
Symbol
Serial
TXD
communication
interface
SCK3
(SCI)
FP-144H
TFP-144
H8/3854 Group
A/D
AN7 to AN4 25 to 22
converter AN3 to AN0 21 to 18
ADTRG
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1. Overview
H8/3857 Group
Pin No.
Type
Symbol
FP-144H
TFP-144
H8/3854 Group
Pin No.
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
LCD
C1+, C1–,
controller C2+, C2–
121 to 118 121 to 118
⎯
⎯
⎯
LCD step-up circuit
capacitance connection
pins (H8/3857 Group
only): These pins connect
external capacitances for
LCD step-up. Connect
capacitances according to
the step-up factor.
H8/3857 V1OUT to
V5OUT
Group
LCD
power
supply
113 to 109 113 to 109
⎯
⎯
I/O
LCD drive power supply
level (H8/3857 Group):
When the OPON bit is set
high, these bits output LCD
drive power supply levels V1
to V5. If the built-in op-amp
drive capacity is inadequate,
connect a capacitor to
provide stabilization. If
levels V1 to V5 are input
from an external source, set
the OPON bit low.
Vci
117
117
⎯
⎯
Input
LCD step-up circuit
reference power supply
(H8/3857 Group only): This
pin doubles as the LCD
step-up circuit reference
input voltage and step-up
circuit power supply, and
provides the LCD drive
voltage. Set 1.6 V ≤ Vci ≤
VCC. If the step-up circuit is
not used, connect Vci to VCC.
VLOUT
122
122
⎯
⎯
Output
LCD step-up voltage
output (H8/3857 Group
only): This is the LCD stepup voltage output pin.
Connect a capacitance.
VLCD
123
123
⎯
⎯
Input
LCD drive power supply
(H8/3857 Group only): This
is the LCD drive power
supply input pin. If the builtin step-up circuit output
voltage is used for the LCD
drive power supply, short
this pin to VLOUT. Set VCC ≤
VLCD ≤ 7.0 V.
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1. Overview
H8/3857 Group
Pin No.
Type
Symbol
H8/3854 V1OUT to
V5OUT
Group
LCD
power
supply
FP-144H
TFP-144
⎯
H8/3854 Group
Pin No.
Pad No.
FP-100B
TFP-100G Pad No.
I/O
Name and Functions
⎯
90 to 86
I/O
LCD drive power supply
level (H8/3854 Group):
When the LPS1 and LPS0
bits are set high, these pins
output LCD drive power
supply levels V1 to V5. If the
drive capacity is inadequate,
connect a capacitor to
provide stabilization. If
levels V1 to V5 are input
from an external source, set
the LPS1 and LPS0 bits low.
The V1 to V5 levels must
not exceed VCC. When
driving with a 1/4 bias, short
V3OUT and V4OUT.
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90 to 86
2. CPU
Section 2 CPU
2.1
Overview
The H8/300L CPU has sixteen 8-bit general registers, which can also be paired as eight 16-bit
registers. Its concise, optimized instruction set is designed for high-speed operation.
2.1.1
Features
Features of the H8/300L CPU are listed below.
• General-register architecture
Sixteen 8-bit general registers, also usable as eight 16-bit general registers
• Instruction set with 55 basic instructions, including:
⎯ Multiply and divide instructions
⎯ Powerful bit-manipulation instructions
• Eight addressing modes
⎯ Register direct
⎯ Register indirect
⎯ Register indirect with displacement
⎯ Register indirect with post-increment or pre-decrement
⎯ Absolute address
⎯ Immediate
⎯ Program-counter relative
⎯ Memory indirect
• 64-kbyte address space
• High-speed operation
⎯ All frequently used instructions are executed in two to four states
⎯ High-speed arithmetic and logic operations
8- or 16-bit register-register add or subtract: 0.4 μs*
8 × 8-bit multiply:
2.8 μs*
16 ÷ 8-bit divide:
2.8 μs*
Note: * These values are at φ = 5 MHz.
• Low-power operation modes
SLEEP instruction for transfer to low-power operation
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2. CPU
2.1.2
Address Space
The H8/300L CPU supports an address space of up to 64 kbytes for storing program code and
data.
See section 2.8, Memory Map, for details of the memory map.
2.1.3
Register Configuration
Figure 2.1 shows the register structure of the H8/300L CPU. There are two groups of registers: the
general registers and control registers.
General registers (Rn)
7
0 7
0
R0H
R0L
R1H
R1L
R2H
R2L
R3H
R3L
R4H
R4L
R5H
R5L
R6H
R6L
R7H
(SP)
SP: Stack Pointer
R7L
Control registers (CR)
15
0
PC
7 6 5 4 3 2 1 0
CCR I U H U N Z V C
PC: Program Counter
CCR: Condition Code Register
Carry flag
Overflow flag
Zero flag
Negative flag
Half-carry flag
Interrupt mask bit
User bit
User bit
Figure 2.1 CPU Registers
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2. CPU
2.2
Register Descriptions
2.2.1
General Registers
All the general registers can be used as both data registers and address registers.
When used as data registers, they can be accessed as 16-bit registers (R0 to R7), or the high bytes
(R0H to R7H) and low bytes (R0L to R7L) can be accessed separately as 8-bit registers.
When used as address registers, the general registers are accessed as 16-bit registers (R0 to R7).
R7 also functions as the stack pointer (SP), used implicitly by hardware in exception processing
and subroutine calls. When it functions as the stack pointer, as indicated in figure 2.2, SP (R7)
points to the top of the stack.
Lower address side [H'0000]
Unused area
SP (R7)
Stack area
Upper address side [H'FFFF]
Figure 2.2 Stack Pointer
2.2.2
Control Registers
The CPU control registers include a 16-bit program counter (PC) and an 8-bit condition code
register (CCR).
Program Counter (PC): This 16-bit register indicates the address of the next instruction the CPU
will execute. All instructions are fetched 16 bits (1 word) at a time, so the least significant bit of
the PC is ignored (always regarded as 0).
Condition Code Register (CCR): This 8-bit register contains internal status information,
including the interrupt mask bit (I) and half-carry (H), negative (N), zero (Z), overflow (V), and
carry (C) flags. These bits can be read and written by software (using the LDC, STC, ANDC,
Rev.3.00 Jul. 19, 2007 page 29 of 532
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2. CPU
ORC, and XORC instructions). The N, Z, V, and C flags are used as branching conditions for
conditional branching (Bcc) instructions.
Bit 7—Interrupt Mask Bit (I): When this bit is set to 1, interrupts are masked. This bit is set to 1
automatically at the start of exception handling. The interrupt mask bit may be read and written by
software. For further details, see section 3.3, Interrupts.
Bit 6—User Bit (U): Can be used freely by the user.
Bit 5—Half-Carry Flag (H): 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 is cleared to 0
otherwise.
The H flag is used implicitly by the DAA and DAS instructions.
When the ADD.W, SUB.W, or CMP.W instruction is executed, the H flag is set to 1 if there is a
carry or borrow at bit 11, and is cleared to 0 otherwise.
Bit 4—User Bit (U): Can be used freely by the user.
Bit 3—Negative Flag (N): Indicates the most significant bit (sign bit) of the result of an
instruction.
Bit 2—Zero Flag (Z): Set to 1 to indicate a zero result, and cleared to 0 to indicate a non-zero
result.
Bit 1—Overflow Flag (V): Set to 1 when an arithmetic overflow occurs, and cleared to 0 at other
times.
Bit 0—Carry Flag (C): Set to 1 when operation execution generates a carry, and cleared to 0
otherwise. Used by:
• Add instructions, to indicate a carry
• Subtract instructions, to indicate a borrow
• Shift and rotate instructions
The carry flag is also used as a bit accumulator by bit manipulation instructions.
Some instructions leave some or all of the flag bits unchanged.
Refer to the H8/300L Series Software Manual for the action of each instruction on the flag bits.
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2. CPU
2.2.3
Initial Register Values
When the CPU is reset, the program counter (PC) is initialized to the value stored at address
H'0000 in the vector table, and the I bit in the CCR is set to 1. The other CCR bits and the general
registers are not initialized. In particular, the stack pointer (R7) is not initialized. To prevent
program crashes the stack pointer should be initialized by software, by the first instruction
executed after a reset.
2.3
Data Formats
The H8/300L CPU can process 1-bit data, 4-bit (BCD) data, 8-bit (byte) data, and 16-bit (word)
data.
• Bit manipulation instructions operate on 1-bit data specified as bit n in a byte operand
(n = 0, 1, 2, ..., 7).
• All arithmetic and logic instructions except ADDS and SUBS can operate on byte data.
• The MOV.W, ADD.W, SUB.W, CMP.W, ADDS, SUBS, MULXU (8 bits × 8 bits), and
DIVXU (16 bits ÷ 8 bits) instructions operate on word data.
• The DAA and DAS instructions perform decimal arithmetic adjustments on byte data in
packed BCD form. Each nibble of the byte is treated as a decimal digit.
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2. CPU
2.3.1
Data Formats in General Registers
The general register data formats are shown in figure 2.3.
Data Type
Register No.
Data Format
7
1-bit data
RnH
1-bit data
RnL
7
0
6
5
4
3
2
1
0
don't care
7
Byte data
Byte data
Word data
RnH
don't care
7
0
MSB
LSB
RnL
Rn
don't care
RnH
4-bit BCD data
RnL
0
6
5
4
3
2
1
0
don't care
7
0
MSB
LSB
15
0
MSB
LSB
7
4-bit BCD data
7
4
3
Upper digit
0
Lower digit
don't care
7
don't care
4
Upper digit
Legend:
RnH: Upper byte of general register
RnL: Lower byte of general register
MSB: Most significant bit
LSB: Least significant bit
Figure 2.3 Register Data Formats
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0
3
Lower digit
2. CPU
2.3.2
Memory Data Formats
Figure 2.4 indicates the data formats in memory. For access by the H8/300L CPU, word data
stored in memory must always begin at an even address. In word access the least significant bit of
the address is regarded as 0. If an odd address is specified, the access is performed at the preceding
even address. This rule affects the MOV.W instruction, and also applies to instruction fetching.
Data Type
Address
Data Format
7
1-bit data
Address n
7
Byte data
Address n
MSB
Even address
MSB
Word data
Odd address
Byte data (CCR) on stack
Word data on stack
0
6
5
4
3
2
1
0
LSB
Upper 8 bits
Lower 8 bits
LSB
Even address
MSB
CCR
LSB
Odd address
MSB
CCR*
LSB
Even address
MSB
Odd address
LSB
Legend:
CCR: Condition code register
Note: * Ignored on return
Figure 2.4 Memory Data Formats
When the stack is accessed using R7 as an address register, word access should always be
performed. For the CCR, the same value is stored in the upper 8 bits and lower 8 bits as word data.
On return, the lower 8 bits are ignored.
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2. CPU
2.4
Addressing Modes
2.4.1
Addressing Modes
The H8/300L CPU supports the eight addressing modes listed in table 2.1. Each instruction uses a
subset of these addressing modes.
Table 2.1
Addressing Modes
No.
Address Modes
Symbol
1
Register direct
Rn
2
Register indirect
@Rn
3
Register indirect with displacement
@(d:16, Rn)
4
Register indirect with post-increment
@Rn+
Register indirect with pre-decrement
@−Rn
5
Absolute address
@aa:8 or @aa:16
6
Immediate
#xx:8 or #xx:16
7
Program-counter relative
@(d:8, PC)
8
Memory indirect
@@aa:8
1. Register Direct—Rn: The register field of the instruction specifies an 8- or 16-bit general
register containing the operand.
Only the MOV.W, ADD.W, SUB.W, CMP.W, ADDS, SUBS, MULXU (8 bits × 8 bits), and
DIVXU (16 bits ÷ 8 bits) instructions have 16-bit operands.
2. Register Indirect—@Rn: The register field of the instruction specifies a 16-bit general
register containing the address of the operand in memory.
3. Register Indirect with Displacement—@(d:16, Rn): The instruction has a second word
(bytes 3 and 4) containing a 16-bit displacement which is added to the contents of the specified
general register (16-bit) to obtain the operand address in memory.
This mode is used only in MOV instructions. For the MOV.W instruction, the resulting address
must be even.
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2. CPU
4. Register Indirect with Post-Increment or Pre-Decrement—@Rn+ or @–Rn:
• Register indirect with post-increment—@Rn+
The @Rn+ mode is used with MOV instructions that load registers from memory.
The register field of the instruction specifies a 16-bit general register containing the address of
the operand. After the operand is accessed, the register is incremented by 1 for MOV.B or 2 for
MOV.W. For MOV.W, the original contents of the 16-bit general register must be even.
• Register indirect with pre-decrement—@–Rn
The @–Rn mode is used with MOV instructions that store register contents to memory.
The register field of the instruction specifies a 16-bit general register which is decremented by
1 or 2 to obtain the address of the operand in memory. The register retains the decremented
value. The size of the decrement is 1 for MOV.B or 2 for MOV.W. For MOV.W, the original
contents of the register must be even.
5. Absolute Address—@aa:8 or @aa:16: The instruction specifies the absolute address of the
operand in memory.
The absolute address may be 8 bits long (@aa:8) or 16 bits long (@aa:16). The MOV.B and bit
manipulation instructions can use 8-bit absolute addresses. The MOV.B, MOV.W, JMP, and JSR
instructions can use 16-bit absolute addresses.
For an 8-bit absolute address, the upper 8 bits are assumed to be 1 (H'FF). The address range is
H'FF00 to H'FFFF (65280 to 65535).
6. Immediate—#xx:8 or #xx:16: The instruction contains an 8-bit operand (#xx:8) in its second
byte, or a 16-bit operand (#xx:16) in its third and fourth bytes. Only MOV.W instructions can
contain 16-bit immediate values.
The ADDS and SUBS instructions implicitly contain the value 1 or 2 as immediate data. Some bit
manipulation instructions contain 3-bit immediate data in the second or fourth byte of the
instruction, specifying a bit number.
7. Program-Counter Relative—@(d:8, PC): This mode is used in the Bcc and BSR
instructions. An 8-bit displacement in byte 2 of the instruction code is sign-extended to 16 bits and
added to the program counter contents to generate a branch destination address. The possible
branching range is –126 to +128 bytes (–63 to +64 words) from the current address. The
displacement should be an even number.
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8. Memory Indirect—@@aa:8: This mode can be used by the JMP and JSR instructions. The
second byte of the instruction code specifies an 8-bit absolute address. The word located at this
address contains the branch destination address.
The upper 8 bits of the absolute address are assumed to be 0 (H'00), so the address range is from
H'0000 to H'00FF (0 to 255). Note that with the H8/300L Series, the lower end of the address area
is also used as a vector area. See section 3.3, Interrupts, for details on the vector area.
If an odd address is specified as a branch destination or as the operand address of a MOV.W
instruction, the least significant bit is regarded as 0, causing word access to be performed at the
address preceding the specified address. See section 2.3.2, Memory Data Formats, for further
information.
2.4.2
Effective Address Calculation
Table 2.2 shows how effective addresses are calculated in each of the addressing modes.
Arithmetic and logic instructions use register direct addressing (1). The ADD.B, ADDX, SUBX,
CMP.B, AND, OR, and XOR instructions can also use immediate addressing (6).
Data transfer instructions can use all addressing modes except program-counter relative (7) and
memory indirect (8).
Bit manipulation instructions use register direct (1), register indirect (2), or absolute addressing (8bit) (5) to specify a byte operand, and 3-bit immediate addressing (6) to specify a bit position in
that byte. The BSET, BCLR, BNOT, and BTST instructions can also use register direct addressing
(1) to specify the bit position.
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Table 2.2
Effective Address Calculation
No.
Addressing Mode and
Instruction Format
1
Register direct, Rn
Effective Address
Calculation Method
Effective Address (EA)
3
0
rm
15
87
op
2
43
rm
rn
Operand is contents of
registers indicated by rm/rn
15
0
Contents (16 bits) of
register indicated by rm
76 43
op
3
15
0
15
0
15
0
15
0
0
rm
Register indirect with
displacement, @(d:16, Rn)
15
0
rn
0
Register indirect, @Rn
15
3
76 43
op
15
0
Contents (16 bits) of
register indicated by rm
0
rm
disp
disp
4
Register indirect with
post-increment, @Rn+
15
76 43
op
15
0
Contents (16 bits) of
register indicated by rm
0
rm
1 or 2
Register indirect with
pre-decrement, @–Rn
15
76 43
op
rm
15
0
Contents (16 bits) of
register indicated by rm
0
Incremented or
decremented by 1 if
operand is byte size, 1 or 2
and by 2 if word size
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No.
5
Addressing Mode and
Instruction Format
Effective Address
Calculation Method
Effective Address (EA)
Absolute address
@aa:8
15
87
op
15
87
0
H'FF
0
abs
@aa:16
15
15
0
0
op
abs
6
Immediate
#xx:8
15
87
op
0
IMM
#xx:16
15
Operand is 1- or 2-byte
immediate data
0
op
IMM
7
Program-counter relative
@(d:8, PC)
87
15
op
15
0
disp
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0
PC contents
15
Sign
extension
disp
0
2. CPU
No.
Addressing Mode and
Instruction Format
8
Memory indirect, @@aa:8
15
87
op
Effective Address
Calculation Method
Effective Address (EA)
0
abs
15
87
H'00
0
abs
15
0
Memory contents
(16 bits)
Legend:
rm, rn: Register field
op:
Operation field
disp: Displacement
IMM: Immediate data
abs: Absolute address
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2.5
Instruction Set
The H8/300L Series can use a total of 55 instructions, which are grouped by function in table 2.3.
Table 2.3
Instruction Set
Function
Instructions
Number
1
1
Data transfer
MOV, PUSH* , POP*
1
Arithmetic operations
ADD, SUB, ADDX, SUBX, INC, DEC, ADDS, SUBS,
DAA, DAS, MULXU, DIVXU, CMP, NEG
14
Logic operations
AND, OR, XOR, NOT
4
Shift
SHAL, SHAR, SHLL, SHLR, ROTL, ROTR, ROTXL,
ROTXR
8
Bit manipulation
BSET, BCLR, BNOT, BTST, BAND, BIAND, BOR,
BIOR, BXOR, BIXOR, BLD, BILD, BST, BIST
14
Branch
Bcc*2, JMP, BSR, JSR, RTS
5
System control
RTE, SLEEP, LDC, STC, ANDC, ORC, XORC, NOP
8
Block data transfer
EEPMOV
1
Total: 55
Notes: 1. PUSH Rn is equivalent to MOV.W Rn, @–SP.
POP Rn is equivalent to MOV.W @SP+, Rn. The machine language is also the same.
2. Bcc is the generic term for conditional branch instructions.
The functions of the instructions are shown in tables 2.4 to 2.11. The meaning of the operation
symbols used in the tables is as follows.
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Operation Notation
Rd
General register (destination)
Rs
General register (source)
Rn
General register
(EAd), <EAd>
Destination operand
(EAs), <EAs>
Source operand
CCR
Condition code register
N
N (negative) flag of CCR
Z
Z (zero) flag of CCR
V
V (overflow) flag of CCR
C
C (carry) flag of CCR
PC
Program counter
SP
Stack pointer
#IMM
Immediate data
disp
Displacement
+
Addition
–
Subtraction
×
Multiplication
÷
Division
∧
AND logical
∨
OR logical
⊕
Exclusive OR logical
→
Move
~
Logical negation (logical complement)
:3
3-bit length
:8
8-bit length
:16
16-bit length
( ), < >
Contents of operand indicated by effective address
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2.5.1
Data Transfer Instructions
Table 2.4 describes the data transfer instructions. Figure 2.5 shows their object code formats.
Table 2.4
Data Transfer Instructions
Instruction
Size*
Function
MOV
B/W
(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.
The Rn, @Rn, @(d:16, Rn), @aa:16, #xx:16, @–Rn, and @Rn+
addressing modes are available for byte or word data. The @aa:8
addressing mode is available for byte data only.
The @–R7 and @R7+ modes require word operands. Do not specify
byte size for these two modes.
POP
W
@SP+ → Rn
Pops a 16-bit general register from the stack. Equivalent to MOV.W
@SP+, Rn.
PUSH
W
Rn → @–SP
Pushes a 16-bit general register onto the stack. Equivalent to MOV.W
Rn, @–SP.
Note:
*
Size: Operand size
B:
Byte
W:
Word
Certain precautions are required in data access. See section 2.9.1, Notes on Data Access, for
details.
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15
8
7
0
op
rm
15
8
rn
0
rm
8
Rm→Rn
7
op
15
MOV
rn
@Rm←→Rn
7
0
op
rm
rn
@(d:16, Rm)←→Rn
disp
15
8
7
0
op
rm
15
8
op
7
0
rn
15
@Rm+→Rn, or
Rn →@–Rm
rn
abs
8
@aa:8←→Rn
7
0
op
rn
@aa:16←→Rn
abs
15
8
op
7
0
rn
15
IMM
8
#xx:8→Rn
7
0
op
rn
#xx:16→Rn
IMM
15
8
op
7
0
1
1
1
rn
PUSH, POP
@SP+ → Rn, or
Rn → @–SP
Legend:
op:
Operation field
rm, rn: Register field
disp: Displacement
abs:
Absolute address
IMM: Immediate data
Figure 2.5 Data Transfer Instruction Codes
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2.5.2
Arithmetic Operations
Table 2.5 describes the arithmetic instructions.
Table 2.5
Arithmetic Instructions
Instruction
Size*
Function
ADD
B/W
Rd ± Rs → Rd, Rd + #IMM → Rd
SUB
Performs addition or subtraction on data in two general registers, or
addition on immediate data and data in a general register. Immediate
data cannot be subtracted from data in a general register. Word data
can be added or subtracted only when both words are in general
registers.
ADDX
B
SUBX
Rd ± Rs ± C → Rd, Rd ± #IMM ± C → Rd
Performs addition or subtraction with carry or borrow on byte data in
two general registers, or addition or subtraction on immediate data and
data in a general register.
INC
B
DEC
Rd ± 1 → Rd
Increments or decrements a general register by 1.
ADDS
W
SUBS
Rd ± 1 → Rd, Rd ± 2 → Rd
Adds or subtracts immediate data to or from data in a general register.
The immediate data must be 1 or 2.
DAA
B
DAS
Rd decimal adjust → Rd
Decimal-adjusts (adjusts to packed 4-bit BCD) an addition or
subtraction result in a general register by referring to the CCR
MULXU
B
Rd × Rs → Rd
Performs 8-bit × 8-bit unsigned multiplication on data in two general
registers, providing a 16-bit result
DIVXU
B
Rd ÷ Rs → Rd
Performs 16-bit ÷ 8-bit unsigned division on data in two general
registers, providing an 8-bit quotient and 8-bit remainder
CMP
B/W
Rd – Rs, Rd – #IMM
Compares data in a general register with data in another general
register or with immediate data, and the result is stored in the CCR.
Word data can be compared only between two general registers.
NEG
B
0 – Rd → Rd
Obtains the two's complement (arithmetic complement) of data in a
general register
Note:
*
Size: Operand size
B:
Byte
W:
Word
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2.5.3
Logic Operations
Table 2.6 describes the four instructions that perform logic operations.
Table 2.6
Logic Operation Instructions
Instruction
Size*
Function
AND
B
Rd ∧ Rs → Rd, Rd ∧ #IMM → Rd
Performs a logical AND operation on a general register and another
general register or immediate data
OR
B
Rd ∨ Rs → Rd, Rd ∨ #IMM → Rd
Performs a logical OR operation on a general register and another
general register or immediate data
XOR
B
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
~ Rd → Rd
Obtains the one's complement (logical complement) of general register
contents
Note:
*
2.5.4
Size: Operand size
B:
Byte
Shift Operations
Table 2.7 describes the eight shift instructions.
Table 2.7
Shift Instructions
Instruction
Size*
Function
SHAL
B
Rd shift → Rd
SHAR
Performs an arithmetic shift operation on general register contents
SHLL
B
SHLR
Performs a logical shift operation on general register contents
ROTL
B
ROTR
Rd rotate → Rd
Rotates general register contents
ROTXL
B
ROTXR
Note:
Rd shift → Rd
Rd rotate → Rd
Rotates general register contents through the carry flag.
*
Size: Operand size
B:
Byte
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Figure 2.6 shows the instruction code format of arithmetic, logic, and shift instructions.
15
8
7
op
0
rm
15
8
7
0
op
15
7
op
0
rm
8
op
8
0
8
0
rn
7
rn
15
ADD, ADDX, SUBX,
CMP (#XX:8)
7
rm
15
MULXU, DIVXU
IMM
op
op
rn
7
rn
15
ADDS, SUBS, INC, DEC,
DAA, DAS, NEG, NOT
rn
8
15
ADD, SUB, CMP,
ADDX, SUBX (Rm)
rn
AND, OR, XOR (Rm)
0
IMM
8
AND, OR, XOR (#xx:8)
7
op
0
rn
SHAL, SHAR, SHLL, SHLR,
ROTL, ROTR, ROTXL, ROTXR
Legend:
op:
Operation field
rm, rn: Register field
IMM: Immediate data
Figure 2.6 Arithmetic, Logic, and Shift Instruction Codes
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2.5.5
Bit Manipulations
Table 2.8 describes the bit-manipulation instructions. Figure 2.7 shows their object code formats.
Table 2.8
Bit-Manipulation Instructions
Instruction
Size*
Function
BSET
B
1 → (<bit-No.> of <EAd>)
Sets a specified bit to 1 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.
BCLR
B
0 → (<bit-No.> of <EAd>)
Clears a specified bit to 0 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.
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 C flag with a specified bit in a general register or memory
operand, and stores the result in the C flag.
BIAND
B
C ∧ [~ (<bit-No.> of <EAd>)] → C
ANDs the C flag with the inverse of a specified bit in a general register
or memory operand, and stores the result in the C flag.
The bit number is specified by 3-bit immediate data.
BOR
B
C ∨ (<bit-No.> of <EAd>) → C
ORs the C flag with a specified bit in a general register or memory
operand, and stores the result in the C flag.
BIOR
B
C ∨ [~ (<bit-No.> of <EAd>)] → C
ORs the C flag with the inverse of a specified bit in a general register
or memory operand, and stores the result in the C flag.
The bit number is specified by 3-bit immediate data.
Note:
*
Size: Operand size
B:
Byte
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Instruction
Size*
Function
BXOR
B
C ⊕ (<bit-No.> of <EAd>) → C
XORs the C flag with a specified bit in a general register or memory
operand, and stores the result in the C flag.
BIXOR
B
C ⊕ [~(<bit-No.> of <EAd>)] → C
XORs the C flag with the inverse of a specified bit in a general register
or memory operand, and stores the result in the C flag.
The bit number is specified by 3-bit immediate data.
BLD
B
(<bit-No.> of <EAd>) → C
Copies a specified bit in a general register or memory operand to the C
flag.
BILD
B
~ (<bit-No.> of <EAd>) → C
Copies the inverse of a specified bit in a general register or memory
operand to the C flag.
The bit number is specified by 3-bit immediate data.
BST
B
C → (<bit-No.> of <EAd>)
Copies the C flag to a specified bit in a general register or memory
operand.
BIST
B
~ C → (<bit-No.> of <EAd>)
Copies the inverse of the C flag to a specified bit in a general register
or memory operand.
The bit number is specified by 3-bit immediate data.
Note:
*
Size: Operand size
B:
Byte
Certain precautions are required in bit manipulation. See section 2.9.2, Notes on Bit Manipulation,
for details.
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BSET, BCLR, BNOT, BTST
15
8
7
op
0
IMM
15
8
7
op
0
rm
15
8
0
rn
op
IMM
8
Operand: register direct (Rn)
Bit No.: register direct (Rm)
rn
7
op
15
Operand: register direct (Rn)
Bit No.: immediate (#xx:3)
rn
0
0
0
0 Operand: register indirect (@Rn)
0
0
0
0 Bit No.:
7
immediate (#xx:3)
0
op
rn
0
0
0
0 Operand: register indirect (@Rn)
op
rm
0
0
0
0 Bit No.:
15
8
7
0
op
abs
op
IMM
15
8
0
Operand: absolute (@aa:8)
0
0
7
0 Bit No.:
immediate (#xx:3)
0
op
abs
op
register direct (Rm)
rm
0
Operand: absolute (@aa:8)
0
0
0 Bit No.:
register direct (Rm)
BAND, BOR, BXOR, BLD, BST
15
8
7
op
0
IMM
15
8
7
op
0
rn
op
IMM
15
8
Operand: register direct (Rn)
Bit No.: immediate (#xx:3)
rn
0
0
0
0 Operand: register indirect (@Rn)
0
0
0
0 Bit No.:
7
0
op
abs
op
immediate (#xx:3)
IMM
0
Operand: absolute (@aa:8)
0
0
0 Bit No.:
immediate (#xx:3)
Legend:
op:
Operation field
rm, rn: Register field
abs:
Absolute address
IMM: Immediate data
Figure 2.7 Bit Manipulation Instruction Codes (1)
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BIAND, BIOR, BIXOR, BILD, BIST
15
8
7
0
op
IMM
15
8
7
op
0
rn
op
IMM
15
8
Operand: register direct (Rn)
Bit No.: immediate (#xx:3)
rn
0
0
0
0 Operand: register indirect (@Rn)
0
0
0
0 Bit No.:
7
0
op
abs
op
immediate (#xx:3)
IMM
0
Operand: absolute (@aa:8)
0
0
0 Bit No.:
immediate (#xx:3)
Legend:
op:
Operation field
rm, rn: Register field
abs:
Absolute address
IMM: Immediate data
Figure 2.7 Bit Manipulation Instruction Codes (2)
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2.5.6
Branching Instructions
Table 2.9 describes the branching instructions. Figure 2.8 shows their object code formats.
Table 2.9
Branching Instructions
Instruction
Size
Function
Bcc
⎯
Branches to the designated address if the specified condition is true. The
branching conditions are given 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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15
8
op
7
0
cc
15
disp
8
7
op
0
rm
15
Bcc
8
0
0
0
7
0
JMP (@Rm)
0
op
JMP (@aa:16)
abs
15
8
7
0
op
abs
15
8
JMP (@@aa:8)
7
0
op
disp
15
8
7
op
0
rm
15
BSR
8
0
0
0
7
0
JSR (@Rm)
0
op
JSR (@aa:16)
abs
15
8
7
op
0
abs
15
8
7
op
Legend:
op: Operation field
cc: Condition field
rm: Register field
disp: Displacement
abs: Absolute address
Figure 2.8 Branching Instruction Codes
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JSR (@@aa:8)
0
RTS
2. CPU
2.5.7
System Control Instructions
Table 2.10 describes the system control instructions. Figure 2.9 shows their object code formats.
Table 2.10 System Control Instructions
Instruction
Size*
Function
RTE
⎯
Returns from an exception-handling routine
SLEEP
⎯
Causes a transition from active mode to a power-down mode. See
section 5, Power-Down Modes, for details
LDC
B
Rs → CCR, #IMM → CCR
Moves immediate data or general register contents to the condition code
register
STC
B
CCR → Rd
Copies the condition code register to a specified general register
ANDC
B
CCR ∧ #IMM → CCR
Logically ANDs the condition code register with immediate data
ORC
B
CCR ∨ #IMM → CCR
Logically ORs the condition code register with immediate data
XORC
B
CCR ⊕ #IMM → CCR
NOP
⎯
PC + 2 → PC
Logically exclusive-ORs the condition code register with immediate data
Only increments the program counter
Note:
*
Size: Operand size
B:
Byte
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15
8
7
0
op
15
8
RTE, SLEEP, NOP
7
0
op
15
rn
8
7
op
LDC, STC (Rn)
0
IMM
ANDC, ORC,
XORC, LDC (#xx:8)
Legend:
op: Operation field
rn: Register field
IMM: Immediate data
Figure 2.9 System Control Instruction Codes
2.5.8
Block Data Transfer Instruction
Table 2.11 describes the block data transfer instruction. Figure 2.10 shows its object code format.
Table 2.11 Block Data Transfer Instruction
Instruction
Size
Function
EEPMOV
⎯
if R4L ≠ 0 then
repeat
@R5+ → @R6+
until
R4L = 0
R4L – 1 → R4L
else next;
Block transfer instruction. Transfers the number of bytes specified by
R4L, from locations starting at the address specified by R5, to locations
starting at the address specified by R6. On completion of the transfer,
the next instruction is executed.
Certain precautions are required in using the EEPMOV instruction. See section 2.9.3, Notes on
Use of the EEPMOV Instruction, for details.
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15
8
7
0
op
op
Legend:
op: Operation field
Figure 2.10 Block Data Transfer Instruction Code
2.6
Basic Operational Timing
CPU operation is synchronized by a system clock (φ) or a subclock (φSUB). For details on these
clock signals see section 4, Clock Pulse Generators. The period from a rising edge of φ or φSUB to
the next rising edge is called one state. A bus cycle consists of two states or three states. The cycle
differs depending on whether access is to on-chip memory or to on-chip peripheral modules.
2.6.1
Access to On-Chip Memory (RAM, ROM)
Access to on-chip memory takes place in two states. The data bus width is 16 bits, allowing access
in byte or word size. Figure 2.11 shows the on-chip memory access cycle.
Bus cycle
T1 state
T2 state
φ or φ SUB
Internal address bus
Address
Internal read signal
Internal data bus
(read access)
Read data
Internal write signal
Internal data bus
(write access)
Write data
Figure 2.11 On-Chip Memory Access Cycle
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2.6.2
Access to On-Chip Peripheral Modules
On-chip peripheral modules are accessed in two states or three states. The data bus width is 8 bits,
so access is by byte size only. This means that for accessing word data, two instructions must be
used. Figures 2.12 and 2.13 show the on-chip peripheral module access cycle.
Two-State Access to On-Chip Peripheral Modules
Bus cycle
T1 state
T2 state
φ or φ SUB
Internal address bus
Address
Internal read signal
Internal data bus
(read access)
Read data
Internal write signal
Internal data bus
(write access)
Write data
Figure 2.12 On-Chip Peripheral Module Access Cycle (2-State Access)
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Three-State Access to On-Chip Peripheral Modules
Bus cycle
T1 state
T2 state
T3 state
φ or φ SUB
Internal
address bus
Address
Internal
read signal
Internal
data bus
(read access)
Read data
Internal
write signal
Internal
data bus
(write access)
Write data
Figure 2.13 On-Chip Peripheral Module Access Cycle (3-State Access)
2.7
CPU States
2.7.1
Overview
There are four CPU states: the reset state, program execution state, program halt state, and
exception-handling state. The program execution state includes active (high-speed or mediumspeed) mode and subactive mode. In the program halt state there are a sleep mode, standby mode,
watch mode, and sub-sleep mode. These states are shown in figure 2.14.
Figure 2.15 shows the state transitions.
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CPU state
Reset state
The CPU is initialized.
Program
execution state
Active
(high speed) mode
The CPU executes successive program
instructions at high speed,
synchronized by the system clock
Active
(medium speed) mode
The CPU executes successive
program instructions at
reduced speed, synchronized
by the system clock
Subactive mode
The CPU executes
successive program
instructions at reduced
speed, synchronized
by the subclock
Program halt state
A state in which some
or all of the chip
functions are stopped
to conserve power
Low-power
modes
Sleep mode
Standby mode
Watch mode
Subsleep mode
Exceptionhandling state
A transient state entered when the CPU changes the processing
flow due to a reset or interrupt exception handling source.
Note: See section 5, Power-Down Modes, for details on the modes and their transitions.
Figure 2.14 CPU Operation States
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2. CPU
Reset cleared
Reset state
Exception-handling state
Reset occurs
Reset
occurs
Reset
occurs
Interrupt
source
Program halt state
Interrupt
source
Exceptionhandling
complete
Program execution state
SLEEP instruction executed
Figure 2.15 State Transitions
2.7.2
Program Execution State
In the program execution state the CPU executes program instructions in sequence.
There are three modes in this state, two active modes (high speed and medium speed) and one
subactive mode. Operation is synchronized with the system clock in active mode (high speed and
medium speed), and with the subclock in subactive mode. See section 5, Power-Down Modes for
details on these modes.
2.7.3
Program Halt State
In the program halt state there are four modes: sleep mode, standby mode, watch mode, and
subsleep mode. See section 5, Power-Down Modes for details on these modes.
2.7.4
Exception-Handling State
The exception-handling state is a transient state occurring when exception handling is started by a
reset or interrupt and the CPU changes its normal processing flow. In exception handling caused
by an interrupt, SP (R7) is referenced and the PC and CCR values are saved on the stack.
For details on interrupt handling, see section 3.3 Interrupts.
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2.8
Memory Map
2.8.1
Memory Map
The memory maps of the H8/3857 Group and H8/3854 Group are shown in figures 2.16 (a) and
(b).
H8/3855 H8/3856 H8/3857 H8/3857F
H'0000
Interrupt vector
(42 bytes)
H'0029
H'002A
On-chip ROM
40
kbytes
48
kbytes
60
kbytes
H'9FFF
H'BFFF
H'EDFF
Not used
H'F77F
H'F780
On-chip RAM
2,048 bytes
H'FF7F
H'FF80
Internal I/O registers
(128 bytes)
H'FFFF
Figure 2.16 (a) H8/3857 Group Memory Map
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60
kbytes
2. CPU
H8/3852
H'0000
H'0029
H'002A
H8/3853
H8/3854*1 H8/3854F*1
Interrupt vector
(42 bytes)
16
kbytes
24
kbytes
32
kbytes
60
kbytes
On-chip ROM
H'3FFF
H'5FFF
H'7FFF
H'EDFF
Not used
H'F77F
H'F780
H8/3854F
On-chip RAM
H8/3852
H8/3853
H8/3854
1,024 bytes*2
H'FB7F
H'FB80
2,048 bytes*2
H'FF7F
H'FF80
Internal I/O registers
(128 bytes)
H'FFFF
Notes: 1. Note that the H8/3854 (mask ROM version) and H8/3854F (F-ZTAT version) have different ROM
and RAM sizes.
2. The start address for 2-kbyte RAM is H'F780, and the start address for 1-kbyte RAM is H'FB80.
Figure 2.16 (b) H8/3854 Group Memory Map
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2.9
Application Notes
2.9.1
Notes on Data Access
Access to Empty Areas: The address space of the H8/300L CPU includes empty areas in addition
to the RAM, registers, and ROM areas available to the user. If these empty areas are mistakenly
accessed by an application program, the following results will occur.
• Data transfer from CPU to empty area
The transferred data will be lost. This action may also cause the CPU to misoperate.
• Data transfer from empty area to CPU
Unpredictable data is transferred.
Access to Internal I/O Registers: Internal data transfer to or from on-chip modules other than the
ROM and RAM areas makes use of an 8-bit data width. If word access is attempted to these areas,
the following results will occur.
• Word access from CPU to I/O register area
Upper byte: Will be written to I/O register.
Lower byte: Transferred data will be lost.
• Word access from I/O register to CPU
Upper byte: Will be written to upper part of CPU register.
Lower byte: Unpredictable data will be written to lower part of CPU register.
Byte size instructions should therefore be used when transferring data to or from I/O registers
other than the on-chip ROM and RAM areas. Figure 2.17 shows the data size and number of states
in which on-chip peripheral modules can be accessed.
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Access
States
Word
Byte
H'0000
H'0029
Interrupt vector area
(42 bytes)
H'002A
2
60 kbytes*1
On-chip ROM
*1
H'EDFF
—
Not used
—
—
H'F780
On-chip RAM
2048 bytes*2
2
H'FF7F
H'FF80
2
Internal I/O registers
(128 bytes)
H'FFA8
H'FFAD
H'FFFF
3
2
Notes: The above example is a description of the H8/3857, H8/3857F, and H8/3854F.
1. The H8/3855 has 40 kbytes of on-chip ROM, ending at address H'9FFF, the H8/3856 has 48 kbytes, ending at
address H'BFFF, the H8/3852 has 16 kbytes, ending at address H'3FFF, the H8/3853 has 24 kbytes, ending at
address H'5FFF, and the H8/3854 (mask ROM version) has 32 kbytes, ending at address H'7FFF.
2. The H8/3857 Group and the H8/3854F have 2,048 bytes of on-chip RAM, and the H8/3854 Group (mask ROM
version) has 1,024 bytes, starting at address H'FB80.
Figure 2.17 Data Size and Number of States for Access to and from
On-Chip Peripheral Modules
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2.9.2
Notes on Bit Manipulation
The BSET, BCLR, BNOT, BST, and BIST instructions read one byte of data, modify the data,
then write the data byte again. Special care is required when using these instructions in cases
where two registers are assigned to the same address, in the case of registers that include writeonly bits, and when the instruction accesses an I/O.
Order of Operation
Operation
1
Read
Read byte data at the designated address
2
Modify
Modify a designated bit in the read data
3
Write
Write the altered byte data to the designated address
Bit Manipulation in Two Registers Assigned to the Same Address
Example 1: Timer load register and timer count bit manipulation
Figure 2.18 shows an example in which two timer registers share the same address. When a bit
manipulation instruction accesses the timer load register and timer counter of a reloadable timer,
since these two registers share the same address, the following operations take place.
Order of Operation
Operation
1
Read
Timer counter data is read (one byte)
2
Modify
The CPU modifies (sets or resets) the bit designated in the instruction
3
Write
The altered byte data is written to the timer load register
The timer counter is counting, so the value read is not necessarily the same as the value in the
timer load register. As a result, bits other than the intended bit in the timer load register may be
modified to the timer counter value.
R
Count clock
Timer counter
Legend:
R: Read
W: Write
Reload
W
Timer load register
Internal bus
Figure 2.18 Timer Configuration Example
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Example 2: When a BSET instruction is executed on port 3
P37 and P36 are designated as input pins, with a low-level signal input at P37 and a high-level
signal at P36. The remaining pins, P35 to P30, are output pins and output low-level signals. In this
example, the BSET instruction is used to change pin P30 to high-level output.
[A: Prior to executing BSET]
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
Low
level
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
0
[B: BSET instruction executed]
BSET
#0
,
@PDR3
The BSET instruction is executed designating port 3.
[C: After executing BSET]
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
High
level
PCR3
0
0
1
1
1
1
1
1
PDR3
0
1
0
0
0
0
0
1
[D: Explanation of how BSET operates]
When the BSET instruction is executed, first the CPU reads port 3.
Since P37 and P36 are input pins, the CPU reads the pin states (low-level and high-level input). P35
to P30 are output pins, so the CPU reads the value in PDR3. In this example PDR3 has a value of
H'80, but the value read by the CPU is H'40.
Next, the CPU sets bit 0 of the read data to 1, changing the PDR3 data to H'41. Finally, the CPU
writes this value (H'41) to PDR3, completing execution of BSET.
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As a result of this operation, bit 0 in PDR3 becomes 1, and P30 outputs a high-level signal.
However, bits 7 and 6 of PDR3 end up with different values.
To avoid this problem, store a copy of the PDR3 data in a work area in memory. Perform the bit
manipulation on the data in the work area, then write this data to PDR3.
[A: Prior to executing BSET]
MOV. B
MOV. B
MOV. B
The PDR3 value (H'80) is written to a work area in memory
(RAM0) as well as to PDR3.
#80,
R0L,
R0L,
R0L
@RAM0
@PDR3
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
Low
level
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
0
RAM0
1
0
0
0
0
0
0
0
[B: BSET instruction executed]
BSET
#0
,
@RAM0
The BSET instruction is executed designating the PDR3
work area (RAM0).
[C: After executing BSET]
The work area (RAM0) value is written to PDR3.
MOV. B
@RAM0, R0L
MOV. B
R0L,
@PDR3
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
High
level
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
1
RAM0
1
0
0
0
0
0
0
1
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Bit Manipulation in a Register Containing a Write-Only Bit
Example 3: When a BCLR instruction is executed on PCR3 of port 3
As in the examples above, P37 and P36 are input pins, with a low-level signal input at P37 and a
high-level signal at P36. The remaining pins, P35 to P30, are output pins that output low-level
signals. In this example, the BCLR instruction is used to change pin P30 to an input port. It is
assumed that a high-level signal will be input to this input pin.
[A: Prior to executing BCLR]
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
Low
level
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
0
[B: BCLR instruction executed]
BCLR
#0
,
@PCR3
The BCLR instruction is executed designating PCR3.
[C: After executing BCLR]
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Output
Output
Output
Output
Output
Output
Output
Input
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
High
level
PCR3
1
1
1
1
1
1
1
0
PDR3
1
0
0
0
0
0
0
0
[D: Explanation of how BCLR operates]
When the BCLR instruction is executed, first the CPU reads PCR3. Since PCR3 is a write-only
register, the CPU reads a value of H'FF, even though the PCR3 value is actually H'3F.
Next, the CPU clears bit 0 in the read data to 0, changing the data to H'FE. Finally, this value
(H'FE) is written to PCR3 and BCLR instruction execution ends.
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As a result of this operation, bit 0 in PCR3 becomes 0, making P30 an input port. However, bits 7
and 6 in PCR3 change to 1, so that P37 and P36 change from input pins to output pins.
To avoid this problem, store a copy of the PCR3 data in a work area in memory. Perform the bit
manipulation on the data in the work area, then write this data to PCR3.
[A: Prior to executing BCLR]
MOV. B
MOV. B
MOV. B
The PCR3 value (H'3F) is written to a work area in memory
(RAM0) as well as to PCR3.
#3F,
R0L,
R0L,
R0L
@RAM0
@PCR3
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
Low
level
PCR3
0
0
1
1
1
1
1
1
PDR3
1
0
0
0
0
0
0
0
RAM0
0
0
1
1
1
1
1
1
[B: BCLR instruction executed]
BCLR
#0
,
@RAM0
The BCLR instruction is executed designating the PCR3
work area (RAM0).
[C: After executing BCLR]
MOV. B
MOV. B
@RAM0, R0L
R0L, @PCR3
The work area (RAM0) value is written to PCR3.
P37
P36
P35
P34
P33
P32
P31
P30
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
Pin state
Low
level
High
level
Low
level
Low
level
Low
level
Low
level
Low
level
High
level
PCR3
0
0
1
1
1
1
1
0
PDR3
1
0
0
0
0
0
0
0
RAM0
0
0
1
1
1
1
1
0
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Table 2.12 lists registers that share the same address, and table 2.13 lists registers that contain
write-only bits.
Table 2.12 Registers with shared addresses
Register Name
Timer counter B and timer load register B
2
Timer counter C and timer load register C*
1
3
Port data register 1* *
Port data register 2*
1
1
2
Port data register 3* *
Abbreviation
Address
TCB/TLB
H'FFB3
TCC/TLC
H'FFB5
PDR1
H'FFD4
PDR2
H'FFD5
PDR3
H'FFD6
Port data register 4*
1
PDR4
H'FFD7
Port data register 5*
1
PDR5
H'FFD8
Port data register 9*1
PDR9
H'FFDC
1
PDRA
H'FFDD
Port data register A*
Notes: 1. These port registers are used also for pin input.
2. A function of the H8/3857 Group only; not provided in the H8/3854 Group.
3. Some bits are not present in the H8/3854 Group.
Table 2.13 Registers with write-only bits
Register Name
Port control register 1*
1
Port control register 2
Port control register 3*
2
Abbreviation
Address
PCR1
H'FFE4
PCR2
H'FFE5
PCR3
H'FFE6
Port control register 4
PCR4
H'FFE7
Port control register 5
PCR5
H'FFE8
Port control register 9
PCR9
H'FFEC
Port control register A
PCRA
H'FFED
Timer control register F
TCRF
H'FFB6
2
PWCR
H'FFD0
2
PWDRU
H'FFD1
PWDRL
H'FFD2
PWM control register*
PWM data register U*
PWM data register L*
2
Notes: 1. Some bits are not present in the H8/3854 Group.
2. A function of the H8/3857 Group only; not provided in the H8/3854 Group.
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2.9.3
Notes on Use of the EEPMOV Instruction
• The EEPMOV instruction is a block data transfer instruction. It moves the number of bytes
specified by R4L from the address specified by R5 to the address specified by R6.
R5
R6
R5 + R4L
R6 + R4L
• When setting R4L and R6, make sure that the final destination address (R6 + R4L) does not
exceed H'FFFF. The value in R6 must not change from H'FFFF to H'0000 during execution of
the instruction.
R5
R6
R5 + R4L
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H'FFFF
Not allowed
R6 + R4L
3. Exception Handling
Section 3 Exception Handling
3.1
Overview
Exception handling is performed in the H8/3857 Group when a reset or interrupt occurs. Table 3.1
shows the priorities of these two types of exception handling.
Table 3.1
Exception Handling Types and Priorities
Priority
Exception Source
Time of Start of Exception Handling
High
Reset
Exception handling starts as soon as the reset state is cleared
Interrupt
When an interrupt is requested, exception handling starts after
execution of the present instruction or the exception handling
in progress is completed
Low
3.2
Reset
3.2.1
Overview
A reset is the highest-priority exception. The internal state of the CPU and the registers of the onchip peripheral modules are initialized.
3.2.2
Reset Sequence
As soon as the RES pin goes low, all processing is stopped and the H8/3857 enters the reset state.
To make sure the chip is reset properly, observe the following precautions.
• At power on: Hold the RES pin low until the clock pulse generator output stabilizes.
• Resetting during operation: Hold the RES pin low for at least 10 system clock cycles.
When the RES pin goes high again after being held low for a given period, reset exception
handling begins. Reset exception handling takes place as follows:
• The CPU internal state and the registers of on-chip peripheral modules are initialized, with the
I bit of the condition code register (CCR) set to 1.
• The PC is loaded from the reset exception handling vector address (H'0000 to H'0001), after
which the program starts executing from the address indicated in PC.
When system power is turned on or off, the RES pin should be held low.
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Figure 3.1 shows the reset sequence.
Reset cleared
Program initial
instruction prefetch
Vector fetch Internal
processing
RES
φ
Internal
address bus
(1)
(2)
Internal read
signal
Internal write
signal
Internal data
bus (16-bit)
(2)
(3)
(1) Reset exception handling vector address (H'0000)
(2) Program start address
(3) First instruction of program
Figure 3.1 Reset Sequence
3.2.3
Interrupt Immediately after Reset
After a reset, if an interrupt were to be accepted before the stack pointer (SP: R7) was initialized,
PC and CCR would not be pushed onto the stack correctly, resulting in program runaway. To
prevent this, immediately after reset exception handling all interrupts are masked. For this reason,
the initial program instruction is always executed immediately after a reset. This instruction
should initialize the stack pointer (e.g. MOV.W #xx: 16, SP).
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3. Exception Handling
3.3
Interrupts
3.3.1
Overview
In the H8/3857 Group, sources that initiate interrupt exception handling include 13 external
interrupts (WKP7 to WKP0, and IRQ4 to IRQ0), and 16 internal interrupts from on-chip peripheral
modules. In the H8/3854 Group, sources that initiate interrupt exception handling include 12
external interrupts (WKP7 to WKP0, IRQ4, IRQ3, IRQ1, and IRQ0), and 14 internal interrupts from
on-chip peripheral modules. Table 3.2 shows the interrupt sources, their priorities, and their vector
addresses. When more than one interrupt is requested, the interrupt with the highest priority is
processed.
The interrupts have the following features:
• Both internal and external interrupts can be masked by the I bit of CCR. When this bit is set to
1, interrupt request flags are set but interrupts are not accepted.
• The external interrupt pins IRQ0 to IRQ4 can each be set independently to either rising edge
sensing or falling edge sensing.
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3. Exception Handling
Table 3.2
Interrupt Sources and Priorities
Priority
Interrupt Source
Interrupt
Vector
Number
Vector Address*1
High
RES
Reset
0
H'0000 to H'0001
IRQ0
IRQ0
4
H'0008 to H'0009
IRQ1
IRQ1
5
H'000A to H'000B
IRQ2*2
IRQ2
6
H'000C to H'000D
IRQ3
IRQ3
7
H'000E to H'000F
IRQ4
IRQ4
8
H'0010 to H'0011
9
H'0012 to H'0013
SCI1 transfer complete
10
H'0014 to H'0015
Timer A
Timer A overflow
11
H'0016 to H'0017
Timer B
Timer B overflow
12
H'0018 to H'0019
Timer C*
Timer C overflow or underflow
13
H'001A to H'001B
Timer FL
Timer FL compare match
14
H'001C to H'001D
15
H'001E to H'001F
18
H'0024 to H'0025
WKP0
WKP0
WKP1
WKP1
WKP2
WKP2
WKP3
WKP3
WKP4
WKP4
WKP5
WKP5
WKP6
WKP6
WKP7
SCI1*
WKP7
2
2
Timer FL overflow
Timer FH
Timer FH compare match
Timer FH overflow
SCI3
SCI3 transmit end
SCI3 transmit data empty
SCI3 receive data full
SCI3 overrun error
SCI3 framing error
SCI3 parity error
Low
A/D converter
A/D conversion end
19
H'0026 to H'0027
(SLEEP instruction
executed)
Direct transfer
20
H'0028 to H'0029
Notes: 1. Vector addresses H'0002 to H'0007 and H'0020 to H'0023 are reserved and cannot be
used.
2. Applies to the H8/3857 Group. In the H8/3854 Group, these vector addresses are
reserved.
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3. Exception Handling
3.3.2
Interrupt Control Registers
Table 3.3 lists the registers that control interrupts.
Table 3.3
Interrupt Control Registers
Register Name
IRQ edge select register*
2
Interrupt enable register 1*
2
Interrupt enable register 2*
2
Interrupt request register 1*
2
Interrupt request register 2*
2
Abbreviation
R/W
Initial Value
Address
IEGR
R/W
H'E0
H'FFF2
IENR1
R/W
H'00
H'FFF3
IENR2
R/W
IRR1
IRR2
Wakeup interrupt request register
IWPR
H'00
H'FFF4
R/W*
1
H'20
H'FFF6
R/W*
1
H'00
H'FFF7
R/W*
1
H'00
H'FFF9
Notes: 1. Write is enabled only for writing of 0 to clear a flag.
2. There are some differences in functions between the H8/3857 Group and the H8/3854
Group. For details, see the individual register descriptions.
IRQ Edge Select Register (IEGR)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
IEG4
IEG3
IEG2*
IEG1
IEG0
Initial value
1
1
1
0
0
0
0
0
Read/Write
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
Note:
*
Applies to the H8/3857 Group. In the H8/3854 Group, this bit must always be cleared to
0.
IEGR is an 8-bit read/write register, used to designate whether pins IRQ0 to IRQ4 are set to rising
edge sensing or falling edge sensing.
Bits 7 to 5—Reserved Bits: Bits 7 to 5 are reserved; they are always read as 1, and cannot be
modified.
Bit 4—IRQ4 Edge Select (IEG4): Bit 4 selects the input sensing of pin IRQ4/ADTRG.
Bit 4: IEG4
Description
0
Falling edge of IRQ4/ADTRG pin input is detected
1
Rising edge of IRQ4/ADTRG pin input is detected
(initial value)
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Bit 3—IRQ3 Edge Select (IEG3): Bit 3 selects the input sensing of pin IRQ3/TMIF.
Bit 3: IEG3
Description
0
Falling edge of IRQ3/TMIF pin input is detected
1
Rising edge of IRQ3/TMIF pin input is detected
(initial value)
Bit 2—IRQ2 Edge Select (IEG2): Bit 2 is used in the H8/3857 Group to select the input sensing
of pin IRQ2/TMIC. In the H8/3854 Group, this bit must always be cleared to 0.
Bit 2: IEG2
Description
0
Falling edge of IRQ2/TMIC pin input is detected
1
Rising edge of IRQ2/TMIC pin input is detected
(initial value)
Bit 1—IRQ1 Edge Select (IEG1): Bit 1 selects the input sensing of pin IRQ1/TMIB.
Bit 1: IEG1
Description
0
Falling edge of IRQ1/TMIB pin input is detected
1
Rising edge of IRQ1/TMIB pin input is detected
(initial value)
Bit 0—IRQ0 Edge Select (IEG0): Bit 0 selects the input sensing of pin IRQ0.
Bit 0: IEG0
Description
0
Falling edge of IRQ0 pin input is detected
1
Rising edge of IRQ0 pin input is detected
(initial value)
Interrupt Enable Register 1 (IENR1)
Bit
7
6
5
4
3
2
1
0
IENTA
IENS1*
IENWP
IEN4
IEN3
IEN2*
IEN1
IEN0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Note:
*
Applies to the H8/3857 Group. In the H8/3854 Group, this bit must always be cleared to
0.
IENR1 is an 8-bit read/write register that enables or disables interrupt requests.
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Bit 7—Timer A Interrupt Enable (IENTA): Bit 7 enables or disables timer A overflow interrupt
requests.
Bit 7: IENTA
Description
0
Disables timer A interrupts
1
Enables timer A interrupts
(initial value)
Bit 6—SCI1 Interrupt Enable (IENS1): Bit 6 is used in the H8/3857 Group to enable or disable
SCI1 transfer complete interrupt requests. In the H8/3854 Group, this bit must always be cleared
to 0.
Bit 6: IENS1
Description
0
Disables SCI1 interrupts
1
Enables SCI1 interrupts
(initial value)
Bit 5—Wakeup Interrupt Enable (IENWP): Bit 5 enables or disables WKP7 to WKP0 interrupt
requests.
Bit 5: IENWP
Description
0
Disables interrupt requests from WKP7 to WKP0
1
Enables interrupt requests from WKP7 to WKP0
(initial value)
Bits 4, 3, 1, and 0—IRQ4, IRQ3, IRQ1, and IRQ0 Interrupt Enable (IEN4, IEN3, IEN1,
IEN0): Bits 4 to 0 enable or disable IRQ4, IRQ3, IRQ1, and IRQ0 interrupt requests.
Bit n: IENn
Description
0
Disables interrupt request IRQn
1
Enables interrupt request IRQn
(initial value)
Note: n = 4, 3, 1, or 0
Bit 2—IRQ2 Interrupt Enable (IEN2): Bit 2 is used in the H8/3857 Group to enable or disable
IRQ2 interrupt requests. In the H8/3854 Group, this bit must always be cleared to 0.
Bit 2: IEN2
Description
0
Disables interrupt request IRQ2
1
Enables interrupt request IRQ2
(initial value)
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3. Exception Handling
Interrupt Enable Register 2 (IENR2)
Bit
7
6
5
4
3
2
1
0
IENDT
IENAD
⎯
⎯
IENTFH
IENTFL
IENTC*
IENTB
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Note:
*
Applies to the H8/3857 Group. In the H8/3854 Group, this bit must always be cleared to
0.
IENR2 is an 8-bit read/write register that enables or disables interrupt requests.
Bit 7—Direct Transfer Interrupt Enable (IENDT): Bit 7 enables or disables direct transfer
interrupt requests.
Bit 7: IENDT
Description
0
Disables direct transfer interrupt requests
1
Enables direct transfer interrupt requests
(initial value)
Bit 6—A/D Converter Interrupt Enable (IENAD): Bit 6 enables or disables A/D converter
interrupt requests.
Bit 6: IENAD
Description
0
Disables A/D converter interrupt requests
1
Enables A/D converter interrupt requests
(initial value)
Bits 5 and 4—Reserved Bits: Bits 5 and 4 are reserved; they should always be cleared to 0.
Bit 3—Timer FH Interrupt Enable (IENTFH): Bit 3 enables or disables timer FH compare
match and overflow interrupt requests.
Bit 3: IENTFH
Description
0
Disables timer FH interrupts
1
Enables timer FH interrupts
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(initial value)
3. Exception Handling
Bit 2—Timer FL Interrupt Enable (IENTFL): Bit 2 enables or disables timer FL compare
match and overflow interrupt requests.
Bit 2: IENTFL
Description
0
Disables timer FL interrupts
1
Enables timer FL interrupts
(initial value)
Bit 1—Timer C Interrupt Enable (IENTC): Bit 1 is used in the H8/3857 Group to enable or
disable timer C overflow or underflow interrupt requests. In the H8/3854 Group, this bit must
always be cleared to 0.
Bit 1: IENTC
Description
0
Disables timer C interrupts
1
Enables timer C interrupts
(initial value)
Bit 0—Timer B Interrupt Enable (IENTB): Bit 0 enables or disables timer B overflow or
underflow interrupt requests.
Bit 0: IENTB
Description
0
Disables timer B interrupts
1
Enables timer B interrupts
(initial value)
SCI3 interrupt control is covered in 10.4.2, in the description of serial control register 3 (SCR3).
Interrupt request register 1 (IRR1)
Bit
Initial value
Read/Write
7
6
5
4
3
2
IRRTA
IRRS1*
⎯
IRRI4
IRRI3
IRRI2*
0
0
1
0
0
0
1
R/W*
2
1
R/W*
⎯
1
R/W*
R/W*
1
R/W*
1
2
1
0
IRRI1
IRRI0
0
0
R/W*
1
R/W*1
Notes: 1. Only a write of 0 for flag clearing is possible.
2. Applies to the H8/3857 Group. In the H8/3854 Group, this bit must always be cleared to
0.
IRR1 is an 8-bit read/write register, in which the corresponding bit is set to 1 when a timer A,
SCI1, or IRQ4 to IRQ0 interrupt is requested. The flags are not cleared automatically when an
interrupt is accepted. It is necessary to write 0 to clear each flag.
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3. Exception Handling
Bit 7—Timer A Interrupt Request Flag (IRRTA)
Bit 7: IRRTA
Description
0
Clearing condition:
When IRRTA = 1, it is cleared by writing 0
1
Setting condition:
When the timer A counter value overflows (goes from H'FF to H'00)
(initial value)
Bit 6—SCI1 Interrupt Request Flag (IRRS1): Bit 6 is used in the H8/3857 Group. In the
H8/3854 Group, this bit must always be cleared to 0.
Bit 6: IRRS1
Description
0
Clearing condition:
When IRRS1 = 1, it is cleared by writing 0
1
(initial value)
Setting condition:
When an SCI1 transfer is completed
Bit 5—Reserved Bit: Bit 5 is reserved; it is always read as 1, and cannot be modified.
Bits 4, 3, 1, and 0—IRQ4, IRQ3, IRQ1, and IRQ0 Interrupt Request Flags (IRRI4, IRRI3,
IRRI1, IRRI0)
Bit n: IRRIn
Description
0
Clearing condition:
When IRRIn = 1, it is cleared by writing 0 to IRRIn
1
Setting condition:
IRRIn is set when pin IRQn is set to interrupt input, and the designated signal
edge is detected
(initial value)
Note: n = 4, 3, 1, or 0
Bit 2—IRQ2 Interrupt Request Flag (IRRI2): Bit 2 is used in the H8/3857 Group. In the
H8/3854 Group, this bit must always be cleared to 0.
Bit 2: IRRI2
Description
0
Clearing condition:
When IRRI2 = 1, it is cleared by write 0 to IRRI2
1
(initial value)
Setting condition:
IRRI2 is set when pin IRQ2 is set to interrupt input, and the designated signal
edge is detected
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3. Exception Handling
Interrupt Request Register 2 (IRR2)
Bit
7
IRRDT
6
5
4
IRRAD
⎯
⎯
3
2
1
0
2
IRRTFH IRRTFL IRRTC*
IRRTB
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W*1
R/W*1
⎯
⎯
R/W*1
R/W*1
R/W*1
R/W*1
Notes: 1. Only a write of 0 for flag clearing is possible.
2. Applies to the H8/3857 Group. In the H8/3854 Group, this bit must always be cleared to
0.
IRR2 is an 8-bit read/write register, in which the corresponding bit is set to 1 when a direct
transfer, A/D converter, timer FH, timer FL, timer C, or timer B interrupt is requested. The flags
are not cleared automatically when an interrupt is accepted. It is necessary to write 0 to clear each
flag.
Bit 7—Direct Transfer Interrupt Request Flag (IRRDT)
Bit 7: IRRDT
Description
0
Clearing condition:
When IRRDT = 1, it is cleared by writing 0
1
(initial value)
Setting condition:
When DTON = 1 and a direct transfer is made immediately after a SLEEP
instruction is executed
Bit 6—A/D Converter Interrupt Request Flag (IRRAD)
Bit 6: IRRAD
Description
0
Clearing condition:
When IRRAD = 1, it is cleared by writing 0
1
(initial value)
Setting condition:
When A/D conversion is completed and ADSF is reset
Bits 5 and 4—Reserved Bits: Bits 5 and 4 are reserved; they should always be cleared to 0.
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Bit 3—Timer FH Interrupt Request Flag (IRRTFH)
Bit 3: IRRTFH
Description
0
Clearing condition:
When IRRTFH = 1, it is cleared by writing 0
1
Setting condition:
When counter FH matches output compare register FH in 8-bit timer mode, or
when 16-bit counter F (TCFL, TCFH) matches output compare register F
(OCRFL, OCRFH) in 16-bit timer mode
(initial value)
Bit 2—Timer FL Interrupt Request Flag (IRRTFL)
Bit 2: IRRTFL
Description
0
Clearing condition
When IRRTFL = 1, it is cleared by writing 0
1
(initial value)
Setting condition:
When counter FL matches output compare register FL in 8-bit timer mode
Bit 1—Timer C Interrupt Request Flag (IRRTC): Bit 1 is used in the H8/3857 Group. In the
H8/3854 Group, this bit must always be cleared to 0.
Bit 1: IRRTC
Description
0
Clearing condition:
When IRRTC = 1, it is cleared by writing 0
1
(initial value)
Setting condition:
When the timer C counter value overflows (goes from H'FF to H'00) or
underflows (goes from H'00 to H'FF)
Bit 0—Timer B Interrupt Request Flag (IRRTB)
Bit 0: IRRTB
Description
0
Clearing condition:
When IRRTB = 1, it is cleared by writing 0
1
(initial value)
Setting condition:
When the timer B counter value overflows (goes from H'FF to H'00)
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3. Exception Handling
Wakeup Interrupt Request Register (IWPR)
Bit
7
6
5
4
3
2
1
0
IWPF7
IWPF6
IWPF5
IWPF4
IWPF3
IWPF2
IWPF1
IWPF0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W*
R/W*
R/W*
R/W*
R/W*
R/W*
R/W*
R/W*
Note:
*
Only a write of 0 for flag clearing is possible.
IWPR is an 8-bit read/write register, in which the corresponding bit is set to 1 when pins WKP to
WKP0 are set to wakeup input and a pin receives a falling edge input. The flags are not cleared
automatically when an interrupt is accepted. It is necessary to write 0 to clear each flag.
7
Bits 7 to 0—Wakeup Interrupt Request Flags (WKPF7 to WKPF0)
Bit n: IWPFn
Description
0
Clearing condition:
When IWPFn = 1, it is cleared by writing 0 to IWPFn
1
Setting condition:
IWPFn is set when pin WKPn is set to wakeup interrupt input, and a falling edge
input is detected at the pin
Note: n = 7 to 0
3.3.3
External Interrupts
The H8/3857 Group has 13 external interrupt sources, WKP7 to WKP0, and IRQ4 to IRQ0. The
H8/3854 Group has 12 external interrupt sources, WKP7 to WKP0, IRQ4, IRQ3, IRQ1, and IRQ0.
Interrupts WKP0 to WKP7: Interrupts WKP0 to WKP7 are requested by falling edge inputs at
pins WKP0 to WKP7. When these pins are designated as WKP0 to WKP7 pins in port mode register
5 (PMR5) and falling edge input is detected, the corresponding bit in the wakeup interrupt request
register (IWPR) is set to 1, requesting an interrupt. Wakeup interrupt requests can be disabled by
clearing the IENWP bit in IENR1 to 0. It is also possible to mask all interrupts by setting the CCR
I bit to 1.
When an interrupt exception handling request is received for interrupts WKP0 to WKP7, the CCR I
bit is set to 1. The vector number for interrupts WKP0 to WKP7 is 9. Since all eight interrupts are
assigned the same vector number, the interrupt source must be determined by the exception
handling routine.
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3. Exception Handling
Interrupts IRQ0 to IRQ4: Interrupts IRQ0 to IRQ4 are requested by into pins inputs to IRQ0 to
IRQ4. These interrupts are detected by either rising edge sensing or falling edge sensing,
depending on the settings of bits IEG0 to IEG4 in the edge select register (IEGR). The IRQ2
interrupt is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
When these pins are designated as pins IRQ0 to IRQ4 in port mode registers 1 and 2 (PMR1 and
PMR2) and the designated edge is input, the corresponding bit in IRR1 is set to 1, requesting an
interrupt. Interrupts IRQ0 to IRQ4 can be disabled by clearing bits IEN0 to IEN4 in IENR1 to 0.
All interrupts can be masked by setting the I bit in CCR to 1.
When IRQ0 to IRQ4 interrupt exception handling is initiated, the I bit is set to 1. Vector numbers 4
to 8 are assigned to interrupts IRQ0 to IRQ4. The order of priority is from IRQ0 (high) to IRQ4
(low). Table 3.2 gives details. In the H8/3854 Group, exception handling vector number 6 is
reserved.
3.3.4
Internal Interrupts
There are 16 internal interrupts that can be requested by the on-chip peripheral modules in the
H8/3857 Group, and 14 in the H8/3854 Group. When a peripheral module requests an interrupt,
the corresponding bit in IRR1 or IRR2 is set to 1. Individual interrupt requests can be disabled by
clearing the corresponding bit in IENR1 or IENR2 to 0. All interrupts can be masked by setting
the I bit in CCR to 1. When an internal interrupt request is accepted, the I bit is set to 1. Vector
numbers 10 to 20 are assigned to these interrupts. Table 3.2 shows the order of priority of
interrupts from on-chip peripheral modules. In the H8/3854 Group, exception handling vector
numbers 10 and 13 are reserved.
3.3.5
Interrupt Operations
Interrupts are controlled by an interrupt controller. Figure 3.2 shows a block diagram of the
interrupt controller. Figure 3.3 shows the flow up to interrupt acceptance.
Interrupt operation is described as follows.
• When an interrupt condition is met while the interrupt enable register bit is set to 1, an
interrupt request signal is sent to the interrupt controller.
• When the interrupt controller receives an interrupt request, it sets the interrupt request flag.
• From among the interrupts with interrupt request flags set to 1, the interrupt controller selects
the interrupt request with the highest priority and holds the others pending. (Refer to
table 3.2 for a list of interrupt priorities.)
• The interrupt controller checks the I bit of CCR. If the I bit is 0, the selected interrupt request
is accepted; if the I bit is 1, the interrupt request is held pending.
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3. Exception Handling
• If the interrupt is accepted, after processing of the current instruction is completed, both PC
and CCR are pushed onto the stack. The state of the stack at this time is shown in figure 3.4.
The PC value pushed onto the stack is the address of the first instruction to be executed upon
return from interrupt handling.
• The I bit of CCR is set to 1, masking all further interrupts.
• The vector address corresponding to the accepted interrupt is generated, and the interrupt
handling routine located at the address indicated by the contents of the vector address is
executed.
Notes: 1. When disabling interrupts by clearing bits in an interrupt enable register, or when
clearing bits in an interrupt request register, always do so while interrupts are masked
(I = 1).
2. If the above clear operations are performed while I = 0, and as a result a conflict arises
between the clear instruction and an interrupt request, exception processing for the
interrupt will be executed after the clear instruction has been executed.
External or
internal
interrupts
Priority decision logic
Interrupt controller
Interrupt
request
External
interrupts or
internal
interrupt
enable
signals
I
CCR (CPU)
Figure 3.2 Block Diagram of Interrupt Controller
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3. Exception Handling
Program execution state
IRRI0 = 1
No
Yes
IEN0 = 1
No
Yes
IRRI1 = 1
No
Yes
IEN1 = 1
Yes
No
IRRI2 = 1*
No
Yes
IEN2 = 1*
No
Yes
IRRDT = 1
No
Yes
IENDT = 1
No
Yes
I=0
No
Yes
PC contents saved
CCR contents saved
I←1
Branch to interrupt
handling routine
Legend:
PC:
CCR:
I:
Program counter
Condition code register
I bit of CCR
Note: * The IRQ2, SCI1, and timer C interrupts are functions of the H8/3857 Group only, and are not provided in the
H8/3854 Group.
Figure 3.3 Flow up to Interrupt Acceptance
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3. Exception Handling
SP – 4
SP (R7)
CCR
SP – 3
SP + 1
CCR*
SP – 2
SP + 2
PCH
SP – 1
SP + 3
PCL
SP + 4
SP (R7)
Even address
Stack area
Prior to start of interrupt
exception handling
PC and CCR
saved to stack
After completion of interrupt
exception handling
Legend:
PCH: Upper 8 bits of program counter (PC)
PCL: Lower 8 bits of program counter (PC)
CCR: Condition code register
SP: Stack pointer
Notes:
PC shows the address of the first instruction to be executed upon
return from the interrupt handling routine.
Register contents must always be saved and restored by word access,
starting from an even-numbered address.
* Ignored on return from interrupt.
Figure 3.4 Stack State after Completion of Interrupt Exception Handling
Figure 3.5 shows a typical interrupt sequence where the program area is in the on-chip ROM and
the stack area is in the on-chip RAM.
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Internal data bus
(16 bits)
Internal write
signal
Internal read
signal
Internal
address bus
φ
Interrupt
request signal
Figure 3.5 Interrupt Sequence
(4)
Instruction
prefetch
(3)
Internal
processing
(5)
(1)
Stack access
(6)
(7)
(9)
Vector fetch
(8)
(10)
(9)
Prefetch instruction of
Internal
interrupt-handling routine
processing
(1) Instruction prefetch address (Instruction is not executed. Address is saved as PC contents, becoming return address.)
(2)(4) Instruction code (not executed)
(3) Instruction prefetch address (Instruction is not executed.)
(5) SP – 2
(6) SP – 4
(7) CCR
(8) Vector address
(9) Starting address of interrupt-handling routine (contents of vector address)
(10) First instruction of interrupt-handling routine
(2)
(1)
Interrupt level
decision and wait for
end of instruction
Interrupt is
accepted
3. Exception Handling
3. Exception Handling
3.3.6
Interrupt Response Time
Table 3.4 shows the number of wait states after an interrupt request flag is set until the first
instruction of the interrupt handler is executed.
Table 3.4
Interrupt Wait States
Item
States
Waiting time for completion of executing instruction*
1 to 13
Saving of PC and CCR to stack
4
Vector fetch
2
Instruction fetch
4
Internal processing
4
Total
15 to 27
Note:
*
Not including EEPMOV instruction.
3.4
Application Notes
3.4.1
Notes on Stack Area Use
When word data is accessed in the H8/3857 Group, the least significant bit of the address is
regarded as 0. Access to the stack always takes place in word size, so the stack pointer (SP: R7)
should never indicate an odd address. Use PUSH Rn (MOV.W Rn, @–SP) or POP Rn (MOV.W
@SP+, Rn) to save or restore register values.
Setting an odd address in SP may cause a program to crash. An example is shown in figure 3.6.
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3. Exception Handling
SP →
SP →
PCH
PC L
R1L
PC L
SP →
H'FEFC
H'FEFD
H'FEFF
BSR instruction
SP set to H'FEFF
MOV. B R1L, @–R7
Stack accessed beyond SP
Contents of PCH are lost
Legend:
PCH: Upper byte of program counter
PCL: Lower byte of program counter
R1L: General register R1L
SP: Stack pointer
Figure 3.6 Operation when Odd Address Is Set in SP
When CCR contents are saved to the stack during interrupt exception handling or restored when
RTE is executed, this also takes place in word size. Both the upper and lower bytes of word data
are saved to the stack; on return, the even address contents are restored to CCR while the odd
address contents are ignored.
3.4.2
Notes on Rewriting Port Mode Registers
When a port mode register is rewritten to switch the functions of external interrupt pins, the
following points should be observed.
When an external interrupt pin function is switched by rewriting the port mode register that
controls these pins (IRQ4, IRQ3, IRQ2*, IRQ1, IRQ0, and WKP7 to WKP0), the interrupt request flag
may be set to 1 at the time the pin function is switched, even if no valid interrupt is input at the
pin. Be sure to clear the interrupt request flag to 0 after switching pin functions. Table 3.5 shows
the conditions under which interrupt request flags are set to 1 in this way.
Note: * Applies to the H8/3857 Group; not provided in the H8/3854 Group.
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3. Exception Handling
Table 3.5
Conditions under which Interrupt Request Flag Is Set to 1
Interrupt Request
Flags Set to 1
Conditions
IRR1
•
When PMR2 bit IRQ4 is changed from 0 to 1 while pin IRQ4 is low and
IEGR bit IEG4 = 0.
•
When PMR2 bit IRQ4 is changed from 1 to 0 while pin IRQ4 is low and
IEGR bit IEG4 = 1.
•
When PMR1 bit IRQ3 is changed from 0 to 1 while pin IRQ3 is low and
IEGR bit IEG3 = 0.
•
When PMR1 bit IRQ3 is changed from 1 to 0 while pin IRQ3 is low and
IEGR bit IEG3 = 1.
•
When PMR1 bit IRQ2 is changed from 0 to 1 while pin IRQ2 is low and
IEGR bit IEG2 = 0.
•
When PMR1 bit IRQ2 is changed from 1 to 0 while pin IRQ2 is low and
IEGR bit IEG2 = 1.
•
When PMR1 bit IRQ1 is changed from 0 to 1 while pin IRQ1 is low and
IEGR bit IEG1 = 0.
•
When PMR1 bit IRQ1 is changed from 1 to 0 while pin IRQ1 is low and
IEGR bit IEG1 = 1.
•
When PMR2 bit IRQ0 is changed from 0 to 1 while pin IRQ0 is low and
IEGR bit IEG0 = 0.
•
When PMR2 bit IRQ0 is changed from 1 to 0 while pin IRQ0 is low and
IEGR bit IEG0 = 1.
IRRI4
IRRI3
IRRI2*
IRRI1
IRRI0
IWPR
Note:
*
IWPF7
When PMR5 bit WKP7 is changed from 0 to 1 while pin WKP7 is low
IWPF6
When PMR5 bit WKP6 is changed from 0 to 1 while pin WKP6 is low
IWPF5
When PMR5 bit WKP5 is changed from 0 to 1 while pin WKP5 is low
IWPF4
When PMR5 bit WKP4 is changed from 0 to 1 while pin WKP4 is low
IWPF3
When PMR5 bit WKP3 is changed from 0 to 1 while pin WKP3 is low
IWPF2
When PMR5 bit WKP2 is changed from 0 to 1 while pin WKP2 is low
IWPF1
When PMR5 bit WKP1 is changed from 0 to 1 while pin WKP1 is low
IWPF0
When PMR5 bit WKP0 is changed from 0 to 1 while pin WKP0 is low
Applies to the H8/3857 Group. In the H8/3854 Group, this flag must always be cleared
to 0.
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3. Exception Handling
Figure 3.7 shows the procedure for setting a bit in a port mode register and clearing the interrupt
request flag.
When switching a pin function, mask the interrupt before setting the bit in the port mode register.
After accessing the port mode register, execute at least one instruction (e.g., NOP), then clear the
interrupt request flag from 1 to 0. If the instruction to clear the flag is executed immediately after
the port mode register access without executing an intervening instruction, the flag will not be
cleared.
An alternative method is to avoid the setting of interrupt request flags when pin functions are
switched by keeping the pins at the high level so that the conditions in table 3.5 do not occur.
CCR I bit ← 1
Interrupts masked. (Another possibility
is to disable the relevant interrupt in
interrupt enable register 1.)
Set port mode register bit
Execute NOP instruction
After setting the port mode register bit,
first execute at least one instruction
(e.g., NOP), then clear the interrupt
request flag to 0
Clear interrupt request flag to 0
CCR I bit ← 0
Interrupt mask cleared
Figure 3.7 Port Mode Register Setting and Interrupt Request Flag Clearing Procedure
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4. Clock Pulse Generators
Section 4 Clock Pulse Generators
4.1
Overview
Clock oscillator circuitry (CPG: clock pulse generator) is provided on-chip, including both a
system clock pulse generator and a subclock pulse generator. The system clock pulse generator
consists of a system clock oscillator and system clock dividers. The subclock pulse generator
consists of a subclock oscillator circuit and a subclock divider.
4.1.1
Block Diagram
Figure 4.1 shows a block diagram of the clock pulse generators.
OSC 1
OSC 2
System clock
oscillator
φOSC
φ OSC /2
System clock
divider (1/2)
(fOSC )
System clock φ OSC /16
divider (1/8)
Prescaler S
(13 bits)
System clock pulse generator
X1
X2
Subclock
oscillator
φW
(f W )
φ
φ W /4
φ W /8
φ/8192
φW
φ W /2
Subclock
divider
(1/2, 1/4, 1/8)
φ /2
to
φ SUB
φ W/2
φ W/4
φ W/8
Subclock pulse generator
Prescaler W
(5 bits)
to
φ W/128
Figure 4.1 Block Diagram of Clock Pulse Generators
4.1.2
System Clock and Subclock
The basic clock signals that drive the CPU and on-chip peripheral modules are φ and φSUB. Four of
the clock signals have names: φ is the system clock, φSUB is the subclock, φOSC is the oscillator
clock, and φW is the watch clock.
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4. Clock Pulse Generators
The clock signals available for use by peripheral modules are φ/2, φ/4, φ/8, φ/16, φ/32, φ/64,
φ/128, φ/256, φ/512, φ/1024, φ/2048, φ/4096, φ/8192, φW, φW/2, φW/4, φW/8, φW/16, φW/32, φW/64,
and φW/128. The clock requirements differ from one module to another.
4.2
System Clock Generator
Clock pulse can be supplied to the system clock divider either by connecting a crystal or ceramic
oscillator, or by providing external clock input.
Connecting a Crystal Oscillator: Figure 4.2 shows a typical method of connecting a crystal
oscillator.
C1
OSC 1
Rf
R f = 1 MΩ ±20%
C1 = C 2 = 12 pF ±20%
OSC 2
C2
Figure 4.2 Typical Connection to Crystal Oscillator
Figure 4.3 shows the equivalent circuit of a crystal oscillator. An oscillator having the
characteristics given in table 4.1 should be used.
CS
LS
RS
OSC 1
OSC 2
C0
Figure 4.3 Equivalent Circuit of Crystal Oscillator
Table 4.1
Crystal Oscillator Parameters
Frequency (MHz)
2
4
8
10
Rs (max)
500 Ω
100 Ω
50 Ω
30 Ω
C0 (max)
7 pF
7 pF
7 pF
7 pF
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4. Clock Pulse Generators
Connecting a Ceramic Oscillator: Figure 4.4 shows a typical method of connecting a ceramic
oscillator.
C1
OSC 1
Rf
OSC 2
C2
R f = 1 MΩ ±20%
C1 = 30 pF ±10%
C2 = 30 pF ±10%
Ceramic oscillator: Murata
Figure 4.4 Typical Connection to Ceramic Oscillator
Notes on Board Design: When generating clock pulses by connecting a crystal or ceramic
oscillator, pay careful attention to the following points.
Avoid running signal lines close to the oscillator circuit, since the oscillator may be adversely
affected by induction currents. (See figure 4.5.)
The board should be designed so that the oscillator and load capacitors are located as close as
possible to pins OSC1 and OSC2.
To be avoided
Signal A Signal B
C1
OSC 1
OSC 2
C2
Figure 4.5 Board Design of Oscillator Circuit
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4. Clock Pulse Generators
Inputting an External Clock: When inputting an external clock, connect it to the OSC1 pin via a
resistance R, and leave the OSC2 pin open.
An example of the connection in this case is shown in figure 4.6.
R
External clock input
OSC1
OSC2
Open
R = 500 Ω ±30%
Figure 4.6 Example of Connection when Inputting an External Clock
Frequency
OSC clock (φosc)
Duty
45% to 55%
4.3
Subclock Generator
Connecting a 32.768-kHz Crystal Oscillator: Clock pulses can be supplied to the subclock
divider by connecting a 32.768-kHz crystal oscillator, as shown in figure 4.7. Following the same
connection precautions as mentioned in Notes on Board Design in section 4.2, System Clock
Generator.
C1
X1
X2
C2
C1 = C 2 = 15 pF (typ.)
Figure 4.7 Typical Connection to 32.768-kHz Crystal Oscillator
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4. Clock Pulse Generators
Figure 4.8 shows the equivalent circuit of the 32.768-kHz crystal oscillator.
CS
LS
RS
X1
X2
C0
C0 = 1.5 pF typ
RS = 14 kΩ typ
f W = 32.768 kHz
Crystal oscillator: MX38T
(Nihon Denpa Kogyo)
Figure 4.8 Equivalent Circuit of 32.768-kHz Crystal Oscillator
Inputting an External Clock
• Circuit configuration
An external clock is input to the X1 pin. The X2 pin should be left open.
An example of the connection in this case is shown in figure 4.9.
External clock input
X1
X2
Open
Figure 4.9 Example of Connection when Inputting an External Clock
• External clock
Input a square waveform to the X1 pin. When using the CPU, timer A, timer C*, or an LCD,
with a subclock (φw) clock selected, do not stop the clock supply to the X1 pin.
Note: * This is a function of the H8/3857 Group only, and is not provided in the H8/3854
Group.
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4. Clock Pulse Generators
txH
VIH
VIL
txL
txr
txf
Figure 4.10 External Subclock Timing
The DC characteristics and timing of an external clock input to the X1 pin are shown in table 4.2.
Table 4.2
DC Characteristics and Timing
(VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F and H8/3857 Group, AVCC = 3.0 V to 5.5 V,
VSS = AVSS = 0.0 V, Ta = –20°C to + 75°C*, unless otherwise specified, including subactive mode)
Item
Applicable
Symbol Pin
Input high voltage
VIH
Input low voltage
External subclock
rise time
External subclock
fall time
Test
Conditions
Values
Min
Typ
Max
Unit Notes
VCC −0.3
⎯
VCC +0.3
V
Figure 4.10
VIL
−0.3
⎯
0.3
txr
⎯
⎯
100
ns
Figure 4.10
txf
⎯
⎯
100
⎯
32.768
⎯
kHz
μs
X1
External subclock
fx
oscillation frequency
fx =
32.768 kHz
External subclock
high width
txH
12.0
⎯
⎯
External subclock
low width
txL
12.0
⎯
⎯
⎯
38.4
⎯
kHz
μs
External subclock
fx
oscillation frequency
fx =
38.4 kHz
External subclock
high width
txH
10.0
⎯
⎯
External subclock
low width
txL
10.0
⎯
⎯
Note:
*
Figure 4.10
Figure 4.10
The guaranteed temperature as an electrical characteristic for die type products is
75°C.
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4. Clock Pulse Generators
4.4
Prescalers
The H8/3857 Group and H8/3854 Group are equipped with two on-chip prescalers having
different input clocks (prescaler S and prescaler W). Prescaler S is a 13-bit counter using the
system clock (φ) as its input clock. Its prescaled outputs provide internal clock signals for on-chip
peripheral modules. Prescaler W is a 5-bit counter using a 32.768-kHz signal divided by 4 (φW/4)
as its input clock. Its prescaled outputs are used by timer A as a time base for timekeeping.
Prescaler S (PSS): Prescaler S is a 13-bit counter using the system clock (φ) as its input clock. It
is incremented once per clock period.
Prescaler S is initialized to H'0000 by a reset, and starts counting on exit from the reset state.
In standby mode, watch mode, subactive mode, and subsleep mode, the system clock pulse
generator stops. Prescaler S also stops and is initialized to H'0000.
The CPU cannot read or write prescaler S.
The output from prescaler S is shared by timer A, timer B, timer C*, timer F, SCI1*, SCI3, the
A/D converter, LCD controller, and 14-bit PWM*. The divider ratio can be set separately for each
on-chip peripheral function.
In active (medium-speed) mode the clock input to prescaler S is φOSC/16.
Note: * This is a function of the H8/3857 Group only, and is not provided in the H8/3854
Group.
Prescaler W (PSW): Prescaler W is a 5-bit counter using a 32.768 kHz signal divided by 4 (φW/4)
as its input clock.
Prescaler W is initialized to H'00 by a reset, and starts counting on exit from the reset state.
Even in standby mode, watch mode, subactive mode, or subsleep mode, prescaler W continues
functioning so long as clock signals are supplied to pins X1 and X2.
Prescaler W can be reset by setting 1s in bits TMA3 and TMA2 of timer mode register A (TMA).
Output from prescaler W can be used to drive timer A, in which case timer A functions as a time
base for timekeeping.
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4. Clock Pulse Generators
4.5
Note on Oscillators
Oscillator characteristics of both the mask ROM and F-ZTAT versions are closely related to board
design and should be carefully evaluated by the user, referring to the examples shown in this
section. Oscillator circuit constants will differ depending on the oscillator element, stray
capacitance in its interconnecting circuit, and other factors. Suitable constants should be
determined in consultation with the oscillator element manufacturer. Design the circuit so that the
oscillator element never receives voltages exceeding its maximum rating.
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5. Power-Down Modes
Section 5 Power-Down Modes
5.1
Overview
The H8/3857 Group and H8/3854 Group have seven modes of operation after a reset. These
include six power-down modes, in which power dissipation is significantly reduced.
Table 5.1 gives a summary of the seven operation modes.
Table 5.1
Operation Modes
Operating Mode
Description
Active (high-speed) mode
The CPU runs on the system clock, executing program
instructions at high speed
Active (medium-speed) mode
The CPU runs on the system clock, executing program
instructions at reduced speed
Subactive mode
The CPU runs on the subclock, executing program instructions
at reduced speed
Sleep mode
The CPU halts. On-chip peripheral modules continue to operate
on the system clock.
Subsleep mode
The CPU halts. Timer A, timer C*, and the LCD controller
continue to operate on the subclock.
Watch mode
The CPU halts. The time-base function of timer A and the LCD
controller continue to operate on the subclock.
Standby mode
The CPU and all on-chip peripheral modules stop operating
Note:
*
This is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
All the above operating modes except active (high-speed) mode are referred to as power-down
modes.
In this section the two active modes (high-speed and medium-speed) are referred to collectively as
active mode.
Figure 5.1 shows the transitions among these operation modes. Table 5.2 indicates the internal
states in each mode.
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5. Power-Down Modes
Program execution state
Program halt state
Reset state
LSON = 0, MSON = 0
ct
io
st
ru
EE
*4
*1
ct
io
n
*3
ct
LSON = 0,
MSON = 1
io
n
Active
(medium-speed)
mode
*1
N
TO
D
1
on
cti
u
str
in
P
Watch mode
n
*3
*4
=
Sleep mode
in
st
ru
ru
1
P
st
=
EE
in
N
TO
D
SL
SL
P
EE
P
EE
ct
io
in
st
ru
SL
Standby mode
SSBY = 1,
TMA3 = 1
SSBY = 0,
LSON = 0
SL
SSBY = 1,
TMA3 = 0,
LSON = 0
P
in
P ion
EE uct
SL str
in
Active (high-speed)
mode
n
Program halt state
E
LE
N
TO
D
S
=
1
*1
SL
LSON = 1,
TMA3 = 1
EE
P
in
st
ru
ct
io
n
SSBY = 0,
LSON = 1,
TMA3 = 1
SLEEP
instruction
Subactive mode
Subsleep mode
*2
: Transition caused by exception handling
Power-down mode
1. A transition between different modes cannot be made to occur simply because an interrupt request is
generated. Make sure that the interrupt is accepted and interrupt handling is performed.
2. Details on the mode transition conditions are given in the explanations of each mode, in sections 5.2
through 5.8.
3. The module standby mode for the LCD controller is initiated by setting a register within the LCD
controller itself, and so is not shown in this diagram.
Notes: 1.
2.
3.
4.
*
Timer A interrupt, IRQ0 interrupt, WKP0 to WKP7 interrupts
Timer A interrupt, timer C interrupt*, timer IRQ0 to IRQ4 interrupts*, WKP0 to WKP7 interrupts
All interrupts*
IRQ0 interrupt, IRQ1 interrupt, WKP0 to WKP7 interrupts
The timer C, SCI1, and IRQ2 interrupts are functions of the H8/3857 Group only, and are not
provided in the H8/3854 Group.
Figure 5.1 Operation Mode Transition Diagram
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5. Power-Down Modes
Table 5.2
Internal State in Each Operation Mode
Active Mode
High
Speed
Medium
Speed
Sleep
Mode
Watch
Mode
Subactive Subsleep
Mode
Mode
Standby
Mode
System clock oscillator Functions
Functions
Functions
Halted
Halted
Halted
Halted
Subclock oscillator
Functions
Functions
Functions
Functions
Functions
Functions
Functions
Instructions Functions
Functions
Halted
Halted
Functions
Halted
Halted
Retained
Retained
Retained
Retained
Function
CPU
operation
RAM
Registers
1
I/O
External
interrupts
Retained*
IRQ0
Functions
Functions
Functions
Functions
Functions
Functions
Functions
4
Retained*
IRQ1
6
4
IRQ2*
Retained*
IRQ3
IRQ4
WKP0
Functions
Functions
Functions
Functions
Functions
Functions
Functions
Functions
Functions
Functions
Functions* Functions* Functions* Retained
WKP1
WKP2
WKP3
WKP4
WKP5
WKP6
WKP7
Peripheral Timer A
module
Timer B
functions
6
Timer C*
3
Retained
SCI1*
Retained
Functions
Functions
Functions
SCI3
6
Retained
Retained
Retained
Retained
Retained
Reset
Reset
Reset
Retained
Reset
Retained
Retained
Retained
Retained
PWM*
Functions
Functions
Retained
A/D
Functions
Functions
Functions
Retained
Retained
Retained
Retained
Functions
Functions
Functions
Functions
Functions
Functions
Retained
5
LCD*
Notes:
Retained
3
Functions/ Functions/
2
2
Retained* Retained*
Timer F
6
3
1.
2.
3.
4.
5.
Register contents held; high-impedance output.
Functions only if external clock or φW/4 internal clock is selected; otherwise halted and retained.
Functions when timekeeping time-base function is selected.
External interrupt requests are ignored. The interrupt request register contents are not affected.
In module standby mode, only the clock supplied to the LCD controller is stopped. Register values
are retained, and all outputs go to the VSS potential.
6. This is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
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5. Power-Down Modes
5.1.1
System Control Registers
The operation mode is selected using the system control registers described in table 5.3.
Table 5.3
System Control Register
Name
Abbreviation
R/W
Initial Value
Address
System control register 1
SYSCR1
R/W
H'07
H'FFF0
System control register 2
SYSCR2
R/W
H'E0
H'FFF1
System Control Register 1 (SYSCR1)
Bit
7
6
5
4
3
2
1
0
SSBY
STS2
STS1
STS0
LSON
⎯
⎯
⎯
Initial value
0
0
0
0
0
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
⎯
⎯
⎯
SYSCR1 is an 8-bit read/write register for control of the power-down modes.
Bit 7—Software Standby (SSBY): This bit designates transition to standby mode or watch mode.
Bit 7: SSBY
Description
0
•
When a SLEEP instruction is executed in active mode, a transition is made
to sleep mode
(initial value)
•
When a SLEEP instruction is executed in subactive mode, a transition is
made to subsleep mode.
•
When a SLEEP instruction is executed in active mode, a transition is made
to standby mode or watch mode.
•
When a SLEEP instruction is executed in subactive mode, a transition is
made to watch mode.
1
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5. Power-Down Modes
Bits 6 to 4—Standby Timer Select 2 to 0 (STS2 to STS0): These bits designate the time the
CPU and peripheral modules wait for stable clock operation after exiting from standby mode or
watch mode to active mode due to an interrupt. The designation should be made according to the
clock frequency so that the waiting time is at least 10 ms.
Bit 6: STS2
Bit 5: STS1
0
0
1
1
*
Bit 4: STS0
Description
0
Wait time = 8,192 states
1
Wait time = 16,384 states
(initial value)
0
Wait time = 32,768 states
1
Wait time = 65,536 states
*
Wait time = 131,072 states
Legend: * Don't care
Bit 3—Low Speed on Flag (LSON): This bit chooses the system clock (φ) or subclock (φSUB) as
the CPU operating clock when watch mode is cleared. The resulting operation mode depends on
the combination of other control bits and interrupt input.
Bit 3: LSON
Description
0
The CPU operates on the system clock (φ)
1
The CPU operates on the subclock (φSUB)
(initial value)
Bits 2 to 0—Reserved Bits: These bits are reserved; they are always read as 1, and cannot be
modified.
System Control Register 2 (SYSCR2)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
NESEL
DTON
MSON
SA1
SA0
Initial value
1
1
1
0
0
0
0
0
Read/Write
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
SYSCR2 is an 8-bit read/write register for power-down mode control.
Bits 7 to 5—Reserved Bits: These bits are reserved; they are always read as 1, and cannot be
modified.
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5. Power-Down Modes
Bit 4—Noise Elimination Sampling Frequency Select (NESEL): This bit selects the frequency
at which the watch clock signal (φW) generated by the subclock pulse generator is sampled, in
relation to the oscillator clock (φOSC) generated by the system clock pulse generator. When φOSC = 2
to 10 MHz, clear NESEL to 0.
Bit 4: NESEL
Description
0
Sampling rate is φOSC/16
1
Sampling rate is φOSC/4
(initial value)
Bit 3—Direct Transfer on Flag (DTON): This bit designates whether or not to make direct
transitions among active (high-speed), active (medium-speed) and subactive mode when a SLEEP
instruction is executed. The mode to which the transition is made after the SLEEP instruction is
executed depends on a combination of this and other control bits.
Bit 3: DTON
Description
0
When a SLEEP instruction is executed in active mode, a transition is made to
standby mode, watch mode, or sleep mode.
(initial value)
When a SLEEP instruction is executed in subactive mode, a transition is made
to watch mode or subsleep mode.
1
When a SLEEP instruction is executed in active (high-speed) mode, a direct
transition is made to active (medium-speed) mode if SSBY = 0, MSON = 1, and
LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and LSON = 1.
When a SLEEP instruction is executed in active (medium-speed) mode, a
direct transition is made to active (high-speed) mode if SSBY = 0, MSON = 0,
and LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and LSON = 1.
When a SLEEP instruction is executed in subactive mode, a direct transition is
made to active (high-speed) mode if SSBY = 1, TMA3 = 1, LSON = 0, and
MSON = 0, or to active (medium-speed) mode if SSBY = 1, TMA3 = 1, LSON =
0, and MSON = 1.
Bit 2—Medium Speed on Flag (MSON): After standby, watch, or sleep mode is cleared, this bit
selects active (high-speed) or active (medium-speed) mode.
Bit 2: MSON
Description
0
Operation is in active (high-speed) mode
1
Operation is in active (medium-speed) mode
Rev.3.00 Jul. 19, 2007 page 106 of 532
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(initial value)
5. Power-Down Modes
Bits 1 and 0—Subactive Mode Clock Select (SA1, SA0): These bits select the CPU clock rate
(φW/2, φW/4, or φW/8) in subactive mode. SA1 and SA0 cannot be modified in subactive mode.
Bit 1: SA1
Bit 0: SA0
Description
0
0
φW/8
1
φW/4
*
φW/2
1
(initial value)
Legend: * Don't care
5.2
Sleep Mode
5.2.1
Transition to Sleep Mode
The system goes from active mode to sleep mode when a SLEEP instruction is executed while the
SSBY and LSON bits in system control register 1 (SYSCR1) are cleared to 0. In sleep mode CPU
operation is halted but the on-chip peripheral functions other than PWM* are operational. The
CPU register contents are retained.
Note: * This is a function of the H8/3857 Group only, and is not provided in the H8/3854
Group.
5.2.2
Clearing Sleep Mode
Sleep mode is cleared by an interrupt (timer A, timer B, timer C*, timer F, IRQ0, IRQ1, IRQ2*,
IRQ3, IRQ4, WKP0 to WKP7, SCI1*, SCI3, A/D converter) or by input at the RES pin.
Note: * The timer C, SCI1, and IRQ2 interrupts are functions of the H8/3857 Group only, and
are not provided in the H8/3854 Group.
Clearing by Interrupt: When an interrupt is requested, sleep mode is cleared and interrupt
exception handling starts. Operation resumes in active (high-speed) mode if MSON = 0 in
SYSCR2, or active (medium-speed) mode if MSON = 1. Sleep mode is not cleared if the I bit of
the condition code register (CCR) is set to 1 or the particular interrupt is disabled in the interrupt
enable register.
Clearing by RES Input: When the RES pin goes low, the CPU goes into the reset state and sleep
mode is cleared.
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5. Power-Down Modes
5.3
Standby Mode
5.3.1
Transition to Standby Mode
The system goes from active mode to standby mode when a SLEEP instruction is executed while
the SSBY bit in SYSCR1 is set to 1, the LSON bit is cleared to 0, and bit TMA3 in timer
register A (TMA) is cleared to 0. In standby mode the clock pulse generator stops, so the CPU and
on-chip peripheral modules stop functioning. As long as a minimum required voltage is applied,
the contents of CPU registers and some on-chip peripheral registers, and data in the on-chip RAM,
are retained. Data in the on-chip RAM will be retained as long as the specified RAM data
retention voltage is supplied. The I/O ports go to the high-impedance state.
5.3.2
Clearing Standby Mode
Standby mode is cleared by an interrupt (IRQ0, IRQ1, WKP0 to WKP7) or by input at the RES pin.
Clearing by Interrupt: When an interrupt is requested, the system clock pulse generator starts.
After the time set in bits STS2–STS0 in SYSCR1 has elapsed, a stable system clock signal is
supplied to the entire chip, standby mode is cleared, and interrupt exception handling starts.
Operation resumes in active (high-speed) mode if MSON = 0 in SYSCR2, or active (mediumspeed) mode if MSON = 1. Standby mode is not cleared if the I bit of CCR is set to 1 or the
particular interrupt is disabled in the interrupt enable register.
Clearing by RES Input: When the RES pin goes low, the system clock pulse generator starts.
After the pulse generator output has stabilized, if the RES pin is driven high, the CPU starts reset
exception handling.
Since system clock signals are supplied to the entire chip as soon as the system clock pulse
generator starts functioning, the RES pin should be kept at the low level until the pulse generator
output stabilizes.
5.3.3
Oscillator Settling Time after Standby Mode Is Cleared
Bits STS2 to STS0 in SYSCR1 should be set as follows.
• When a Crystal Oscillator is Used
The table below gives settings for various operating frequencies. Set bits STS2 to STS0 for a
waiting time of at least 10 ms.
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5. Power-Down Modes
Table 5.4
Clock Frequency and Settling Time (Times are in ms)
STS2
STS1
STS0
Waiting Time
5 MHz
4 MHz
2 MHz
1 MHz
0.5 MHz
0
0
0
8,192 states
1.6
2.0
4.1
8.2
16.4
1
16,384 states
3.2
4.1
8.2
16.4
32.8
0
32,768 states
6.6
8.2
16.4
32.8
65.5
1
65,536 states
13.1
16.4
32.8
65.5
131.1
*
131,072 states
26.2
32.8
65.5
131.1
262.1
1
1
*
Legend: * Don't care
• When an External Clock is Used
Any values may be set. Normally the minimum time (STS2 = STS1 = STS0 = 0) should be set.
5.3.4
Transition to Standby Mode and Port Pin States
The system goes from active (high-speed or medium-speed) mode to standby mode when a
SLEEP instruction is executed while the SSBY bit in SYSCR1 is set to 1, the LSON bit is cleared
to 0, and bit TMA3 in TMA is cleared to 0. Port pins (except those with their MOS pull-up turned
on) enter high-impedance state when the transition to standby mode is made. This timing is shown
in figure 5.2.
φ
Internal
data bus
SLEEP instruction fetch
Next instruction fetch
SLEEP instruction
execution
Port pins
Output
Active (high-speed or medium-speed) mode
Internal
processing
High-impedance
Standby mode
Figure 5.2 Transition to Standby Mode and Port Pin States
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5. Power-Down Modes
5.3.5
Notes on External Input Signal Changes before/after Standby Mode
1. When external input signal changes before/after standby mode or watch mode
When an external input signal such as IRQ or WKP is input, both the high- and low-level
widths of the signal must be at least two cycles of system clock φ or subclock φSUB (referred to
together in this section as the internal clock). As the internal clock stops in standby mode and
watch mode, the width of external input signals requires careful attention when a transition is
made via these operating modes. Ensure that external input signals conform to the conditions
stated in 3, Recommended timing of external input signals, below
2. When external input signals cannot be captured because internal clock stops
The case of falling edge capture is illustrated in figure 5.3
As shown in the case marked "Capture not possible," when an external input signal falls
immediately after a transition to active (high-speed or medium-speed) mode or subactive
mode, after oscillation is started by an interrupt via a different signal, the external input signal
cannot be captured if the high-level width at that point is less than 2 tcyc or 2 tsubcyc.
3. Recommended timing of external input signals
To ensure dependable capture of an external input signal, high- and low-level signal widths of
at least 2 tcyc or 2 tsubcyc are necessary before a transition is made to standby mode or watch
mode, as shown in "Capture possible: case 1."
External input signal capture is also possible with the timing shown in "Capture possible: case
2" and "Capture possible: case 3," in which a 2 tcyc or 2 tsubcyc level width is secured.
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5. Power-Down Modes
Operating
mode
Active (high-speed,
medium-speed) mode
or subactive mode
tcyc
tsubcyc
tcyc
tsubcyc
Wait for Active (high-speed,
Standby mode oscillation medium-speed) mode
or watch mode to settle or subactive mode
tcyc
tsubcyc
tcyc
tsubcyc
φ or φSUB
External input signal
Capture possible:
case 1
Capture possible:
case 2
Capture possible:
case 3
Capture not
possible
Interrupt by different
signall
Figure 5.3 External Input Signal Capture when Signal Changes before/after
Standby Mode or Watch Mode
4. Input pins to which these notes apply:
IRQ4, IRQ3, IRQ2*, IRQ1, IRQ0, WKP7 to WKP0, ADTRG, TMIB, TMIC*, TMIF
Note: * H8/3857 Group pin, not provided in the H8/3854 Group.
5.4
Watch Mode
5.4.1
Transition to Watch Mode
The system goes from active or subactive mode to watch mode when a SLEEP instruction is
executed while the SSBY bit in SYSCR1 is set to 1 and bit TMA3 in TMA is set to 1.
In watch mode, operation of on-chip peripheral modules other than timer A and the LCD
controller is halted. The LCD controller can be selected to operate or to halt. As long as a
minimum required voltage is applied, the contents of CPU registers and some registers of the onchip peripheral modules, and the on-chip RAM contents, are retained. I/O ports keep the same
states as before the transition.
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5.4.2
Clearing Watch Mode
Watch mode is cleared by an interrupt (timer A, IRQ0, WKP0 to WKP7) or by a input at the RES
pin.
Clearing by Interrupt: Watch mode is cleared when an interrupt is requested. The mode to which
a transition is made depends on the settings of LSON in SYSCR1 and MSON in SYSCR2. If both
LSON and MSON are cleared to 0, transition is to active (high-speed) mode; if LSON = 0 and
MSON = 1, transition is to active (medium-speed) mode; if LSON = 1, transition is to subactive
mode. When the transition is to active mode, after the time set in SYSCR1 bits STS2–STS0 has
elapsed, a stable clock signal is supplied to the entire chip, and interrupt exception handling starts.
Watch mode is not cleared if the I bit of CCR is set to 1 or the particular interrupt is disabled in
the interrupt enable register.
Clearing by RES Input: Clearing by RES pin is the same as for standby mode; see section 5.3.2,
Clearing Standby Mode.
5.4.3
Oscillator Settling Time after Watch Mode Is Cleared
The waiting time is the same as for standby mode; see section 5.3.3, Oscillator Settling Time after
Standby Mode is Cleared.
5.4.4
Notes on External Input Signal Changes before/after Watch Mode
See section 5.3.5, Notes on External Input Signal Changes before/after Standby Mode.
5.5
Subsleep Mode
5.5.1
Transition to Subsleep Mode
The system goes from subactive mode to subsleep mode when a SLEEP instruction is executed
while the SSBY bit in SYSCR1 is cleared to 0, LSON bit in SYSCR1 is set to 1, and TMA3 bit in
TMA is set to 1.
In subsleep mode, operation of on-chip peripheral modules other than timer A, timer C*, and the
LCD controller is halted. As long as a minimum required voltage is applied, the contents of CPU
registers and some registers of the on-chip peripheral modules, and the on-chip RAM contents, are
retained. I/O ports keep the same states as before the transition.
Note: * This is a function of the H8/3857 Group only, and is not provided in the H8/3854
Group.
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5. Power-Down Modes
5.5.2
Clearing Subsleep Mode
Subsleep mode is cleared by an interrupt (timer A, timer C*, IRQ0, IRQ1, IRQ2*, IRQ3, IRQ4,
WKP0 to WKP7) or by a low input at the RES pin.
Note: * The timer C and IRQ2 interrupts are functions of the H8/3857 Group only, and are not
provided in the H8/3854 Group.
Clearing by Interrupt: When an interrupt is requested, subsleep mode is cleared and interrupt
exception handling starts. Subsleep mode is not cleared if the I bit of CCR is set to 1 or the
particular interrupt is disabled in the interrupt enable register.
Clearing by RES Input: Clearing by RES pin is the same as for standby mode; see section 5.3.2,
Clearing Standby Mode.
5.6
Subactive Mode
5.6.1
Transition to Subactive Mode
Subactive mode is entered from watch mode if a timer A, IRQ0, or WKP0 to WKP7 interrupt is
requested while the LSON bit in SYSCR1 is set to 1. From subsleep mode, subactive mode is
entered if a timer A, timer C*, IRQ0, IRQ1, IRQ2*, IRQ3, IRQ4, or WKP0 to WKP7 interrupt is
requested. A transition to subactive mode does not take place if the I bit of CCR is set to 1 or the
particular interrupt is disabled in the interrupt enable register.
Note: * The timer C and IRQ2 interrupts are functions of the H8/3857 Group only, and are not
provided in the H8/3854 Group.
5.6.2
Clearing Subactive Mode
Subactive mode is cleared by a SLEEP instruction or by a input at the RES pin.
Clearing by SLEEP Instruction: If a SLEEP instruction is executed while the SSBY bit in
SYSCR1 is set to 1 and TMA3 bit in TMA is set to 1, subactive mode is cleared and watch mode
is entered. If a SLEEP instruction is executed while SSBY = 0 and LSON = 1 in SYSCR1 and
TMA3 = 1 in TMA, subsleep mode is entered. Direct transfer to active mode is also possible; see
section 5.8, Direct Transfer, below.
Clearing by RES Pin: Clearing by RES pin is the same as for standby mode; see Clearing by RES
pin in section 5.3.2, Clearing Standby Mode.
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5. Power-Down Modes
5.6.3
Operating Frequency in Subactive Mode
The operating frequency in subactive mode is set in bits SA1 and SA0 in SYSCR2. The choices
are φW/2, φW/4, and φW/8.
5.7
Active (medium-speed) Mode
5.7.1
Transition to Active (medium-speed) Mode
If the MSON bit in SYSCR2 is set to 1 while the LSON bit in SYSCR1 is cleared to 0, a transition
to active (medium-speed) mode results from IRQ0, IRQ1, or WKP0 to WKP7 interrupts in standby
mode, timer A, IRQ0, or WKP0 to WKP7 interrupts in watch mode, or any interrupt in sleep mode.
A transition to active (medium-speed) mode does not take place if the I bit of CCR is set to 1 or
the particular interrupt is disabled in the interrupt enable register.
5.7.2
Clearing Active (medium-speed) Mode
Active (medium-speed) mode is cleared by a SLEEP instruction or by a input at the RES pin.
Clearing by SLEEP Instruction: A transition to standby mode takes place if a SLEEP
instruction is executed while the SSBY bit in SYSCR1 is set to 1, the LSON bit in SYSCR1 is
cleared to 0, and TMA3 bit in TMA is cleared to 0. The system goes to watch mode if the SSBY
bit in SYSCR1 is set to 1 and TMA3 bit in TMA is set to 1 when a SLEEP instruction is executed.
Sleep mode is entered if both SSBY and LSON are cleared to 0 when a SLEEP instruction is
executed. Direct transfer to active (high-speed) mode or to subactive mode is also possible. See
section 5.8, Direct Transfer, below for details.
Clearing by RES Pin: When the RES pin goes low, the CPU enters the reset state and active
(medium-speed) mode is cleared.
5.7.3
Operating Frequency in Active (medium-speed) Mode
In active (medium-speed) mode, the CPU is clocked at 1/8 the frequency in active (high-speed)
mode.
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5. Power-Down Modes
5.8
Direct Transfer
5.8.1
Direct Transfer Overview
The CPU can execute programs in three modes: active (high-speed) mode, active (medium-speed)
mode, and subactive mode. A direct transfer is a transition among these three modes without the
stopping of program execution. A direct transfer can be made by executing a SLEEP instruction
while the DTON bit in SYSCR2 is set to 1. After the mode transition, direct transfer interrupt
exception handling starts.
If the direct transfer interrupt is disabled in interrupt enable register 2 (IENR2), a transition is
made instead to sleep mode or watch mode. Note that if a direct transition is attempted while the I
bit in CCR is set to 1, sleep mode or watch mode will be entered, and it will be impossible to clear
the resulting mode by means of an interrupt.
Direct Transfer from Active (High-Speed) Mode to Active (Medium-Speed) Mode: When a
SLEEP instruction is executed in active (high-speed) mode while the SSBY and LSON bits in
SYSCR1 are cleared to 0, the MSON bit in SYSCR2 is set to 1, and the DTON bit in SYSCR2 is
set to 1, a transition is made to active (medium-speed) mode via sleep mode.
Direct Transfer from Active (Medium-Speed) Mode to Active (High-Speed) Mode: When a
SLEEP instruction is executed in active (medium-speed) mode while the SSBY and LSON bits in
SYSCR1 are cleared to 0, the MSON bit in SYSCR2 is cleared to 0, and the DTON bit in
SYSCR2 is set to 1, a transition is made to active (high-speed) mode via sleep mode.
Direct Transfer from Active (High-Speed) Mode to Subactive Mode: When a SLEEP
instruction is executed in active (high-speed) mode while the SSBY and LSON bits in SYSCR1
are set to 1, the DTON bit in SYSCR2 is set to 1, and TMA3 bit in TMA is set
to 1, a transition is made to subactive mode via watch mode.
Direct Transfer from Subactive Mode to Active (High-Speed) Mode: When a SLEEP
instruction is executed in subactive mode while the SSBY bit in SYSCR1 is set to 1, the LSON bit
in SYSCR1 is cleared to 0, the MSON bit in SYSCR2 is cleared to 0, the DTON bit in SYSCR2 is
set to 1, and TMA3 bit in TMA is set to 1, a transition is made directly to active (high-speed)
mode via watch mode after the waiting time set in SYSCR1 bits STS2 to STS0 has elapsed.
Direct Transfer from Active (Medium-Speed) Mode to Subactive Mode: When a SLEEP
instruction is executed in active (medium-speed) while the SSBY and LSON bits in SYSCR1 are
set to 1, the DTON bit in SYSCR2 is set to 1, and TMA3 bit in TMA is set to 1, a transition is
made to subactive mode via watch mode.
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5. Power-Down Modes
Direct Transfer from Subactive Mode to Active (Medium-Speed) Mode: When a SLEEP
instruction is executed in subactive mode while the SSBY bit in SYSCR1 is set
to 1, the LSON bit in SYSCR1 is cleared to 0, the MSON bit in SYSCR2 is set to 1, the DTON bit
in SYSCR2 is set to 1, and TMA3 bit in TMA is set to 1, a transition is made directly to active
(medium-speed) mode via watch mode after the waiting time set in SYSCR1 bits STS2 to STS0
has elapsed.
5.8.2
Calculation of Direct Transfer Time before Transition
Time Required before Direct Transfer from Active (High-speed) Mode to Active (MediumSpeed) Mode: A direct transfer is made from active (high-speed) mode to active (medium-speed)
mode when a SLEEP instruction is executed in active (high-speed) mode while the SSBY and
LSON bits in SYSCR1 are cleared to 0, the MSON bit in SYSCR2 is set to 1, and the DTON bit in
SYSCR2 is set to 1. A direct transfer time, that is, the time from SLEEP instruction execution to
interrupt exception handling completion is calculated by expression (1) below.
Direct transfer time = (number of states for SLEEP instruction execution + number of
states for internal processing) × tcyc before transition + number of
states for interrupt exception handling execution × tcyc after
transition
...... (1)
Example: Direct transfer time for the H8/3857 Group and H8/3854 Group
= (2 + 1) × 2tosc + 14 × 16tosc = 230 tosc
Legend:
tosc: OSC clock cycle time
tcyc: System clock (φ) cycle time
Time Required before Direct Transfer from Active (Medium-Speed) Mode to Active (HighSpeed) Mode: A direct transfer is made from active (medium-speed) mode to active (high-speed)
mode when a SLEEP instruction is executed in active (medium-speed) mode while the SSBY and
LSON bits in SYSCR1 are cleared to 0, the MSON bit in SYSCR2 is cleared to 0, and the DTON
bit in SYSCR2 is set to 1. A direct transfer time, that is, the time from SLEEP instruction
execution to interrupt exception handling completion is calculated by expression (2) below.
Direct transfer time = (number of states for SLEEP instruction execution + number of
states for internal processing) × tcyc before transition + number of
states for interrupt exception handling execution × tcyc after
transition
...... (2)
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5. Power-Down Modes
Example: Direct transfer time for the H8/3857 Group and H8/3854 Group
= (2 + 1) × 16tosc + 14 × 2tosc = 76 tosc
Legend:
tosc: OSC clock cycle time
tcyc: System clock (φ) cycle time
Time Required before Direct Transfer from Subactive Mode to Active (High-Speed) Mode:
A direct transfer is made from subactive mode to active (high-speed) mode when a SLEEP
instruction is executed in subactive mode while the SSBY bit in SYSCR1 is set to 1, the LSON bit
in SYSCR1 is cleared to 0, the MSON bit in SYSCR2 is cleared to 0, the DTON bit in SYSCR2 is
set to 1, and the TMA3 bit in TMA is set to 1. A direct transfer time, that is, the time from SLEEP
instruction execution to interrupt exception handling completion is calculated by expression (3)
below.
Direct transfer time = (number of states for SLEEP instruction execution + number of
states for internal processing) × tsubcyc before transition + (wait
time designated by STS2 to STS0 bits in SCR + number of states
for interrupt exception handling execution) × tcyc after transition
...... (3)
Example: Direct transfer time for the H8/3857 Group and H8/3854 Group
(when CPU clock frequency is φw/8 and wait time is 8192 states)
= (2 + 1) × 8tw + (8192 + 14) × 2tosc = 24tw + 16412tosc
Legend:
tosc:
tw:
tcyc:
tsubcyc:
OSC clock cycle time
Watch clock cycle time
System clock (φ) cycle time
Subclock (φSUB) cycle time
Time Required before Direct Transfer from Subactive Mode to Active (Medium-Speed)
Mode: A direct transfer is made from subactive mode to active (medium-speed) mode when a
SLEEP instruction is executed in subactive mode while the SSBY bit in SYSCR1 is set to 1, the
LSON bit in SYSCR1 is cleared to 0, the MSON and DTON bits in SYSCR2 are set to 1, and the
TMA3 bit in TMA is set to 1. A direct transfer time, that is, the time from SLEEP instruction
execution to interrupt exception handling completion is calculated by expression (4) below.
Direct transfer time = (number of states for SLEEP instruction execution + number of
states for internal processing) × tsubcyc before transition + (wait
time designated by STS2 to STS0 bits in SCR + number of states
for interrupt exception handling execution) × tcyc after transition
...... (4)
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5. Power-Down Modes
Example: Direct transfer time for the H8/3857 Group and H8/3854 Group
(when CPU clock frequency is φw/8 and wait time is 8192 states)
= (2 + 1) × 8tw + (8192 + 14) × 16tosc = 24tw + 131296tosc
Legend:
tosc:
tw:
tcyc:
tsubcyc:
5.8.3
OSC clock cycle time
Watch clock cycle time
System clock (φ) cycle time
Subclock (φSUB) cycle time
Notes on External Input Signal Changes before/after Direct Transition
1. Direct transition from active (high-speed) mode to subactive mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
2. Direct transition from active (medium-speed) mode to subactive mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
3. Direct transition from subactive mode to active (high-speed) mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
4. Direct transition from subactive mode to active (medium-speed) mode
Since the mode transition is performed via watch mode, see section 5.3.5, Notes on External
Input Signal Changes before/after Standby Mode.
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6. ROM
Section 6 ROM
6.1
Overview
The H8/3857 has 60 kbytes of on-chip flash memory or mask ROM, while the H8/3856 has 48
kbytes, and the H8/3855 40 kbytes, of on-chip mask ROM. The H8/3854 has 60 kbytes of on-chip
flash memory or 32 kbytes of on-chip mask ROM, while the H8/3853 has 24 kbytes, and the
H8/3852 16 kbytes, of on-chip mask ROM. Note that the H8/3854 flash memory and mask ROM
versions have different ROM sizes. The ROM is connected to the CPU by a 16-bit data bus,
allowing high-speed 2-state data access for both byte data and word data.
With the flash memory versions (H8/3857F, H8/3854F), programs can be written and erased and
programmed either with a general-purpose PROM programmer or on-board.
When carrying out program development using the H8/3854F with the intention of mask ROM
implementation, care must be taken with ROM and RAM sizes since the maximum sizes for the
mask ROM version are 32 kbytes of ROM and 1 kbyte of RAM.
6.1.1
Block Diagram
Figure 6.1 shows a block diagram of the on-chip ROM.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'0000
H'0000
H'0001
H'0002
H'0002
H'0003
On-chip ROM
H'EDFE
H'EDFE
H'EDFF
Even-numbered
address
Odd-numbered
address
Figure 6.1 ROM Block Diagram (60 kbytes)
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6. ROM
6.2
Overview of Flash Memory
6.2.1
Features
Features of the flash memory are summarized below.
• Four flash memory operating modes
⎯ Program mode
⎯ Erase mode
⎯ Program-verify mode
⎯ Erase-verify mode
• Programming/erase methods
The flash memory is programmed 32 bytes at a time. Erasing is performed in block units. To
erase multiple blocks, each block must be erased in turn. In block erasing, 1-kbyte, 28-kbyte,
16-kbyte, and 12-kbyte blocks can be set arbitrarily.
• Programming/erase times
The flash memory programming time is 10 ms (typ.)*1 for simultaneous 32-byte programming,
equivalent to 300 μs (typ.)*1 per byte, and the erase time is 100 ms (typ.)*2 per block.
• Reprogramming capability
The flash memory can be reprogrammed up to 100 times.
• On-board programming modes
There are two modes in which flash memory can be programmed/erased/verified on-board:
⎯ Boot mode
⎯ User program mode
• Automatic bit rate adjustment
For data transfer in boot mode, the chip's bit rate can be automatically adjusted to match the
transfer bit rate of the host (9600, 4800, or 2400 bps).
• Protect modes
There are three protect modes⎯hardware, software, and error⎯which allow protected status
to be designated for flash memory program/erase/verify operations.
• Writer mode
Flash memory can be programmed/erased in Writer mode, using a PROM programmer, as well
as in on-board programming mode.
Notes: 1. Shows the total time during which the P bit in flash memory control register 1
(FLMCR1) is set. The program-verify time is not included.
2. Shows the total time during which the E bit in flash memory control register 1
(FLMCR1) is set. The erase-verify time is not included.
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6. ROM
6.2.2
Block Diagram
Internal data bus (lower 8 bits)
Internal data bus (upper 8 bits)
SYSCR3
FLMCR1
FLMCR2
Bus interface/controller
Operating
mode
FWE pin
EBR
TEST2 pin
TEST pin
MDCR
H'0000
H'0001
H'0002
H'0003
H'0004
H'0005
On-chip flash memory (60 kbytes)
Legend:
SYSCR3
FLMCR1
FLMCR2
EBR
H'EDFC
H'EDFD
H'EDFE
H'EDFF
Upper byte
(even address)
Lower byte
(odd address)
: System control register 3*
: Flash memory control register 1*
: Flash memory control register 2*
: Erase block register*
Note: * The registers that control the flash memory (FLMCR1, FLMCR2, EBR, and MDCR)
are for use exclusively by the flash memory version, and are not provided in the
mask ROM version.
In the mask ROM version, a read access to the address of a register other than
MDCR will always return 0, a read access to the address (H'FF89) corresponding to
MDCR will return an undefined value, and writes are invalid.
Figure 6.2 Block Diagram of Flash Memory
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6.2.3
Flash Memory Operating Modes
Mode Transition Diagram: When the TEST2, TEST, and FWE pins are set in the reset state and
a reset start is effected, the chip enters one of the operating modes shown in figure 6.3. In user
mode, the flash memory can be read but cannot be programmed or erased.
Modes in which the flash memory can be programmed and erased are boot mode, user program
mode, and Writer mode.
User
program
mode
Reset state
RES = 0
*
RES = 0
FWE = 1,
TEST2 = TEST = 0
0
=
FWE = 0
or
SWE = 0
S
TEST2 = 1,
FWE = 1,
SWE = 1
1,
RE
User mode
2=
EST
T
,
0
=0
T=
TES FWE
=0
RES
Writer mode
Boot mode
On-board programming mode
Notes: Transitions between user mode and user program mode should only be
made when the CPU is not accessing the flash memory.
* TEST2 = 0, TEST = 1
PB6 = PB5 = 1
PB4 = 0
Figure 6.3 Flash Memory Related State Transitions
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On-Board Programming Modes
• Boot Mode
1. Initial state
The flash memory is in the erased state when shipped.
The procedure for rewriting an old version of an
application program or data is described here. The
user should prepare a programming control program
and the new application program beforehand in the
host.
2. Programming control program transfer
When boot mode is entered, the boot program in the
chip (already incorporated in the chip) is started, an
SCI communication check is carried out, and the boot
program required for flash memory erasing is
automatically transferred to the RAM boot program
area.
Host
Host
Programming
control program
Programming
control program
New application
program
New application
program
H8/3857F or H8/3854F
H8/3857F or H8/3854F
SCI
Boot program
Flash memory
SCI
Boot program
Flash memory
(RAM)
(RAM)
Boot program area
Application
program
(old version)
Application
program
(old version)
3. Flash memory initialization
The erase program in the boot program area (in RAM)
is executed, and the flash memory is initialized (to
H'FF). In boot mode, total flash memory erasure is
performed, without regard to blocks.
4. Writing new application program
The programming control program in the host is
transferred to RAM by SCI communication and
executed, and the new application program in the host
is written into the flash memory.
Host
Host
Programming
control program
New application
program
H8/3857F or H8/3854F
H8/3857F or H8/3854F
SCI
Boot program
Flash memory
(RAM)
Flash memory
(RAM)
Programming
control program
Boot program area
Flash memory erase
SCI
Boot program
New application
program
Program execution state
Figure 6.4 Boot Mode
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• User Program Mode
1. Initial state
The FWE assessment program that confirms that a high
level has been applied to the FWE pin, and the program
that will transfer the programming/erase control program
from flash memory to on-chip RAM, should be written into
the flash memory by the user beforehand. The
programming/erase control program should be prepared
in the host or in the flash memory.
2. Programming/erase control program transfer
When a high level is applied to the FWE pin, user
software confirms this fact, executes the transfer program
in the flash memory, and transfers the programming/erase
control program to RAM.
Host
Host
Programming/erase
control program
New application
program
New application
program
H8/3857F or H8/3854F
H8/3857F or H8/3854F
SCI
Boot program
Flash memory
(RAM)
SCI
Boot program
Flash memory
FWE assessment
program
Transfer program
(RAM)
FWE assessment
program
Transfer program
Programming/erase
control program
Application program
(old version)
Application program
(old version)
3. Flash memory initialization
The programming/erase program in RAM is executed, and
the flash memory is initialized (to H'FF). Erasing can be
performed in block units, but not in byte units.
4. Writing new application program
Next, the new application program in the host is written
into the erased flash memory blocks. Do not write to
unerased blocks.
Host
Host
New application
program
H8/3857F or H8/3854F
H8/3857F or H8/3854F
SCI
Boot program
Flash memory
(RAM)
FWE assessment
program
Transfer program
SCI
Boot program
Flash memory
(RAM)
FWE assessment
program
Transfer program
Programming/erase
control program
Flash memory
erase
Programming/erase
control program
New application
program
Program execution state
Figure 6.5 User Program Mode (Example)
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Differences between Boot Mode and User Program Mode
Table 6.1
Differences between Boot Mode and User Program Mode
Boot Mode
User Program Mode
Total erase
Possible
Possible
Block erase
Not possible
Possible
Programming control program*
Program/program-verify
Erase/erase-verify
Program/program-verify
Note:
To be provided by the user, in accordance with the recommended algorithm.
*
Block Configuration: The flash memory is divided into one 12-kbyte block, one 16-kbyte block,
one 28-kbyte block, and four 1-kbyte blocks.
Address H'0000
60 kbytes
1 kbyte
1 kbyte
1 kbyte
1 kbyte
28 kbytes
16 kbytes
12 kbytes
Address H'EDFF
Figure 6.6 Flash Memory Blocks
6.2.4
Pin Configuration
The flash memory is controlled by means of the pins shown in table 6.2.
Table 6.2
Flash Memory Pins
Pin Name
Abbr.
I/O
Function
Reset
RES
Input
Reset
Flash write enable
FWE
Input
Flash program/erase protection by hardware
Test 2
TEST2
Input
Sets H8/3857F operating mode
Test
TEST
Input
Sets H8/3857F operating mode
Transmit data*
TXD
Output
SCI3 transmit data output
Receive data*
RXD
Input
SCI3 receive data input
Note:
*
The transmit data pin and receive data pin are used in boot mode.
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6.2.5
Register Configuration
The registers used to control the on-chip flash memory when enabled are shown in table 6.3. In
order to access these registers, the FLSHE bit in SYSCR3 must be set to 1.
Table 6.3
Flash Memory Registers
Register Name
Abbr.
R/W
5
Initial Value
Address
R/W*
H'00*
3
H'FF80*1
2
Flash memory control register 1
FLMCR1*
Flash memory control register 2
FLMCR2*5
R/W*2
H'00*4
H'FF81*1
Erase block register
EBR*5
R/W*2
H'00*4
H'FF83*1
Mode control register
MDCR
R
Undefined
H'FF89
System control register 3
SYSCR3
R/W
H'00
H'FF8F
Notes: 1. Flash memory register selection is performed by means of the FLSHE bit in system
control register 3 (SYSCR3).
2. When the FWE bit in FLMCR1 is cleared to 0, writes are invalid.
3. When a high level is input to the FWE pin, the initial value is H'80.
4. When a low level is input to the FWE pin, or if a high level is input and the SWE bit in
FLMCR1 is not set, these registers are initialized to H'00.
5. FLMCR1, FLMCR2, and EBR are 8-bit registers. Only byte accesses are valid for these
registers, the access requiring 2 states.
The registers shown in table 6.3 are for use exclusively by the flash memory version. In the mask
ROM version, a read access to the address of a register other than MDCR will always return 0, a
read access to the MDCR address will return an undefined value, and writes are invalid.
6.3
Flash Memory Register Descriptions
6.3.1
Flash Memory Control Register 1 (FLMCR1)
Bit
7
6
5
4
3
2
1
0
FWE
SWE
⎯
⎯
EV
PV
E
P
Initial value
⎯*
0
0
0
0
0
0
0
Read/Write
R
R/W
⎯
⎯
R/W
R/W
R/W
R/W
Note:
*
Determined by the state of the FWE pin.
FLMCR1 is an 8-bit register used for flash memory operating mode control. Program-verify mode
or erase-verify mode is entered by setting SWE to 1 when FWE = 1, then setting the
corresponding bit. Program mode is entered by setting SWE to 1 when FWE = 1, then setting the
PSU bit in FLMCR2, and finally setting the P bit. Erase mode is entered by setting SWE to 1
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6. ROM
when FWE = 1, then setting the ESU bit in FLMCR2, and finally setting the E bit. FLMCR1 is
initialized by a reset and in standby mode. Its initial value is H'80 when a high level is input to the
FWE pin, and H'00 when a low level is input.
Writes to the SWE bit in FLMCR1 are enabled only when FWE = 1; writes to the EV and PV bits
only when FWE = 1 and SWE = 1; writes to the E bit only when FWE = 1, SWE = 1, and ESU =
1; and writes to the P bit only when FWE = 1, SWE = 1, and PSU = 1.
Bit 7—Flash Write Enable (FWE): Bit 7 sets hardware protection against flash memory
programming/erasing. See section 6.9, Flash Memory Programming and Erasing Precautions, for
more information on the use of this bit.
Bit 7: FWE
Description
0
When a low level is input to the FWE pin (hardware-protected state)
1
When a high level is input to the FWE pin
Bit 6—Software Write Enable (SWE)*1*2: Bit 6 enables or disables flash memory programming
and erasing. (This bit should be set before setting bits ESU, PSU, EV, PV, E, P, and EB6 to EB0,
and should not be cleared at the same time as these bits.)
Bit 6: SWE
Description
0
Programming/erasing disabled
1
(initial value)
Programming/erasing enabled
[Setting condition]
When FWE = 1
Bits 5 and 4—Reserved Bits: Bits 5 and 4 are reserved; they are always read as 0 and cannot be
modified.
Bit 3—Erase-Verify (EV)*1: Bit 3 selects erase-verify mode transition or clearing. (Do not set the
SWE, ESU, PSU, PV, E, or P bit at the same time.)
Bit 3: EV
Description
0
Erase-verify mode cleared
1
Transition to erase-verify mode
(initial value)
[Setting condition]
When FWE = 1 and SWE = 1
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Bit 2—Program-Verify (PV)*1: Bit 2 selects program-verify mode transition or clearing. (Do not
set the SWE, ESU, PSU, EV, E, or P bit at the same time.)
Bit 2: PV
Description
0
Program-verify mode cleared
1
(initial value)
Transition to program-verify mode
[Setting condition]
When FWE = 1 and SWE = 1
Bit 1—Erase (E)*1*3: Bit 1 selects erase mode transition or clearing. (Do not set the SWE, ESU,
PSU, EV, PV, or P bit at the same time.)
Bit 1: E
Description
0
Erase mode cleared
1
(initial value)
Transition to erase mode
[Setting condition]
When FWE = 1, SWE = 1, and ESU = 1
Bit 0—Program (P)*1*3: Bit 0 selects program mode transition or clearing. (Do not set the SWE,
ESU, PSU, EV, PV, or E bit at the same time.)
Bit 0: P
Description
0
Program mode cleared
1
Transition to program mode
(initial value)
[Setting condition]
When FWE = 1, SWE = 1, and PSU = 1
Notes: 1. Do not set multiple bits simultaneously. Do not cut VCC while a bit is set.
2. The SWE bit must not be set or cleared at the same time as other bits (bits EV, PV, E,
and P in FLMCR1, and bits ESU and PSU in FLMCR2).
3. P bit and E bit setting should be carried out in accordance with the program/erase
algorithms shown in section 6.5, Flash Memory Programming/Erasing. Before setting
either of these bits, a watchdog timer setting should be made to prevent program
runaway. See section 6.9, Flash Memory Programming and Erasing Precautions, for
more information on the use of these bits.
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6.3.2
Flash Memory Control Register 2 (FLMCR2)
Bit
7
6
5
4
3
2
1
0
FLER
⎯
⎯
⎯
⎯
⎯
ESU
PSU
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
⎯
⎯
⎯
⎯
⎯
R/W
R/W
FLMCR2 is an 8-bit register used for monitoring of flash memory program/erase protection (error
protection) and for flash memory program/erase mode setup. FLMCR2 is initialized to H'00 by a
reset. The ESU and PSU bits are cleared to 0 in standby mode, hardware protect mode, and
software protect mode.
Bit 7—Flash Memory Error (FLER): Bit 7 indicates that an error has occurred during an
operation on flash memory (programming or erasing). When FLER is set to 1, flash memory goes
to the error-protection state.
Bit 7: FLER Description
0
Flash memory is operating normally
Flash memory program/erase protection (error protection) is disabled
[Clearing condition]
Reset
1
(initial value)
An error occurred during flash memory programming/erasing
Flash memory program/erase protection (error protection) is enabled
[Setting condition]
See section 6.6.3, Error Protection
Bits 6 to 2—Reserved Bits: Bits 6 to 2 are reserved; they are always read as 0 and cannot be
modified.
Bit 1—Erase Setup (ESU)*: Bit 1 prepares for a transition to erase mode. Set this bit to 1 before
setting the E bit in FLMCR1. (Do not set the SWE, PSU, EV, PV, E, or P bit at the same time.)
Bit 1: ESU
Description
0
Erase setup cleared
1
(initial value)
Erase setup
[Setting condition]
When FWE = 1 and SWE = 1
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Bit 0—Program Setup (PSU)*: Bit 0 prepares for a transition to program mode. Set this bit to 1
before setting the P bit in FLMCR1. (Do not set the SWE, ESU, EV, PV, E, or P bit at the same
time.)
Bit 0: PSU
Description
0
Program setup cleared
1
Program setup
(initial value)
[Setting condition]
When FWE = 1 and SWE = 1
Note: * Do not set multiple bits simultaneously.
Do not cut VCC while a bit is set.
6.3.3
Erase Block Register (EBR)
Bit
7
6
5
4
3
2
1
0
⎯
EB6
EB5
EB4
EB3
EB2
EB1
EB0
Initial value
0
0
0
0
0
0
0
0
Read/Write
⎯
R/W
R/W
R/W
R/W
R/W
R/W
R/W
EBR is a register that specifies the flash memory erase area, block by block. Bits 6 to 0 of EBR are
read/write bits. EBR is initialized to H'00 by a reset, in standby mode, when a low level is input to
the FWE pin, and when a high level is input to the FWE pin while the SWE bit in FLMCR1 is
cleared to 0. When a bit in EBR is set to 1, the corresponding block can be erased. Other blocks
are erase-protected. As erasing is carried out on a block-by-block basis, only one bit in EBR
should be set at a time (more than one bit must not be set).
The flash memory block configuration is shown in table 6.4. To erase the entire flash memory,
individual blocks must be erased in succession.
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Table 6.4
Flash Memory Erase Blocks
Block (Size)
Addresses
EB0 (1 kbyte)
H'0000 to H'03FF
EB1 (1 kbyte)
H'0400 to H'07FF
EB2 (1 kbyte)
H'0800 to H'0BFF
EB3 (1 kbyte)
H'0C00 to H'0FFF
EB4 (28 kbytes)
H'1000 to H'7FFF
EB5 (16 kbytes)
H'8000 to H'BFFF
EB6 (12 kbytes)
H'C000 to H'EDFF
6.3.4
Mode Control Register (MDCR)
Bit
Initial value
Read/Write
Note:
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
⎯
TSDS2
TSDS1
0
0
0
0
0
0
⎯*
⎯*
⎯
⎯
⎯
⎯
⎯
⎯
R
R
Determined by the TEST2 and TEST pins.
*
MDCR is an 8-bit read-only register used to monitor the current operating mode of the H8/3857F.
Bits 7 to 2—Reserved Bits: Bits 7 to 2 are reserved; they are always read as 0 and cannot be
modified.
Bits 1 and 0—Test Pin Monitor 2 and 1 (TSDS2, TSDS1): Bits 1 and 0 show values that reflect
the input levels at the test pins (TEST2 and TEST) (i.e. they indicate the current operating mode).
Bits TSDS2 and TSDS1 correspond to pins TEST2 and TEST, respectively. These bits are readonly, and cannot be modified.
6.3.5
System Control Register 3 (SYSCR3)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
FLSHE
⎯
⎯
⎯
Initial value
0
0
0
0
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
R/W
⎯
⎯
⎯
SYSCR3 is an 8-bit read/write register that controls the on-chip flash memory.
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SYSCR3 is initialized to H'00 by a reset.
Bits 7 to 4—Reserved Bits: Bits 7 to 4 are reserved; they are always read as 0 and cannot be
modified.
Bit 3—Flash Memory Control Register Enable (FLSHE): Bit 3 controls CPU access to the
flash memory control registers (FLMCR1, FLMCR2, and EBR). When the FLSHE bit is set to 1,
the flash memory control registers can be read and written to. When FLSHE is cleared to 0, the
flash memory control registers are unselected. In this case, the contents of the flash memory
control registers are retained.
Bit 3: FLSHE Description
0
Flash memory control registers are unselected for addresses H'FF80 to H'FF83
(initial value)
1
Flash memory control registers are selected for addresses H'FF80 to H'FF83
Bits 2 to 0—Reserved Bits: Bits 2 to 0 are reserved; they are always read as 0 and cannot be
modified.
6.4
On-Board Programming Modes
When an on-board programming mode is selected, the on-chip flash memory can be programmed,
erased, and verified. There are two on-board programming modes: boot mode and user program
mode. Table 6.5 shows the pin settings for transition to each mode. A state transition diagram for
flash memory related modes is shown in figure 6.3.
Table 6.5
On-Board Programming Mode Selection
Mode
Pins
MCU Mode
FWE
TEST2
TEST
1*
0
0
1
1
0
2
Boot mode
1
User program mode*
Notes: 1. The FWE pin should normally be set to 0. Before performing programming, erasing, or
verifying, set the FWE pin to 1 and make a transition to user program mode.
2. For the high level application timing, see items (f) and (g) under (3) Notes on Use of
Boot Mode in section 6.4.1, Boot Mode.
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6.4.1
Boot Mode
To use boot mode, a user program for programming and erasing the flash memory must be
provided in advance in the host. SCI3 is used in asynchronous mode.
When a reset start is executed after the chip's pins have been set to boot mode, the built-in boot
program is activated, and the programming control program provided in the host is transferred
sequentially to the chip using SCI3. The chip writes the programming control program received
via SCI3 to the programming control program area in the on-chip RAM. After the transfer is
completed, execution branches to the start address (H'FB80) of the programming control program
area, and the programming control program execution state is entered (flash memory
programming is performed).
Therefore, a routine conforming to the programming algorithm described later must be provided in
the programming control program transferred from the host.
Figure 6.7 shows the system configuration in boot mode, and figure 6.8 shows the boot mode
execution procedure.
H8/3857F
H8/3854F
Flash memory
Host
Reception of
programming data
RXD
SCI3
Transmission of verify data
On-chip RAM
TXD
Figure 6.7 System Configuration when Using Boot Mode
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Start
Set pins to boot mode and
execute reset start
Host transmits data (H'00)
continuously at prescribed bit rate
Chip measures low period of H'00 data
transmitted by host
Chip calculates bit rate and sets value
in bit rate register
After bit rate adjustment, chip transmits one
H'00 data byte to host to indicate end of
adjustment
Host confirms normal reception of bit rate
adjustment end indication (H'00), and
transmits one H'55 data byte
After receiving H'55, chip transmits
one H'AA data byte to host
Host transmits number of programming
control program bytes (N), upper byte
followed by lower byte
Chip transmits received number of bytes
to host as verify data (echo-back)
n=1
Host transmits programming control
program sequentially in byte units
Chip transmits received programming
control program to host as verify data
(echo-back)
n + 1→ n
Transfer received programming control
program to on-chip RAM
n=N?
No
Yes
End of transmission
Check flash memory data, and if data has
already been written, erase all blocks
After confirming that all flash memory data
has been erased, chip transmits one H'AA
byte to host
Execute programming control program
transferred to on-chip RAM
Note: If a memory cell does not operate normally and cannot be erased, one
H'FF byte is transmitted as an erase error, and the erase operation and
subsequent operations are halted.
Figure 6.8 Boot Mode Execution Procedure
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Automatic SCI Bit Rate Adjustment
Start
bit
D0
D1
D2
D3
D4
D5
Low period (9 bits) measured (H'00 data)
D6
D7
Stop
bit
High period
(1 or more bits)
Figure 6.9 RXD Input Signal in Automatic SCI Bit Rate Adjustment
When boot mode is initiated, the chip measures the low period of the asynchronous SCI
communication data (H'00) transmitted continuously from the host . The SCI transmit/receive
format should be set as 8-bit data, 1 stop bit, no parity. The chip calculates the bit rate of the
transmission from the host from the measured low period, and transmits one H'00 byte to the host
to indicate the end of bit rate adjustment. The host should confirm that this adjustment end
indication (H'00) has been received normally, and transmit one H'55 byte to the chip. If reception
cannot be performed normally, initiate boot mode again (reset), and repeat the above operations.
Depending on the host's transmission bit rate and the chip's system clock frequency, there will be a
discrepancy between the bit rates of the host and the chip. To ensure correct SCI operation, the
host's transfer bit rate should be set to 2400, 4800, or 9600 bps*1.
Table 6.6 shows typical host transfer bit rates and system clock frequencies for which automatic
adjustment of the chip's bit rate is possible. The boot program should be executed within this
system clock oscillation frequency range*2.
Notes: 1. Use a host bit rate setting of 2400, 4800, or 9600 bps only. No other setting should be
used.
2. Although the chip may also perform automatic bit rate adjustment with bit rate and
system clock combinations other than those shown in table 6.6, a degree of error will
arise between the bit rates of the host and the chip, and subsequent transfer will not be
performed normally. Therefore, only a combination of bit rate and system clock
oscillation frequency within one of the ranges shown in table 6.6 can be used for boot
mode execution.
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Table 6.6
System Clock Oscillation Frequencies for which Automatic Adjustment of
Chip's Bit Rate is Possible
System Clock Oscillation Frequencies (fosc) for which Automatic Adjustment
Host Bit Rate of Chip's Bit Rate is Possible
9600bps
1.2288 MHz, 2.4576 MHz, 4.9152 MHz, 6 MHz to 10 MHz
4800bps
1.2288 MHz, 2.4576 MHz, 4 MHz to 10 MHz
2400bps
1.2288 MHz, 2 MHz to 10 MHz
On-Chip RAM Area Divisions in Boot Mode: In boot mode, the 1-kbyte area from H'F780 to
H'FB7F is reserved as an area for use by the boot program, as shown in figure 6.10. The area to
which the programming control program is transferred comprises addresses H'FB80 to H'FF7F.
The boot program area becomes available when the programming control program transferred to
RAM switches to the execution state. A stack area should be set up as necessary.
H'F780
Boot program
area*
H'FB7F
H'FB80
Programming
control program area
H'FF7F
Note: * The boot program area cannot be used until the programming control
program transferred to RAM switches to the execution state. Note also
that the boot program remains in this area in RAM even after control
branches to the programming control program.
Figure 6.10 RAM Areas in Boot Mode
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Notes on Use of Boot Mode
1. When the chip comes out of reset in boot mode, it measures the low period of the input at the
SCI3's RXD pin. The reset should end with RXD high. After the reset ends, it takes about 100
states for the chip to get ready to measure the low period of the RXD input.
2. In boot mode, if any data has been programmed into the flash memory (if all data is not 1), all
flash memory blocks are erased. Boot mode is for use when user program mode is unavailable,
such as the first time on-board programming is performed, or if the program activated in user
program mode is accidentally erased.
3. Interrupts cannot be used while the flash memory is being programmed or erased.
4. The RXD and TXD lines should be pulled up on the board.
5. Before branching to the programming control program (RAM area address H'FB80), the chip
terminates transmit and receive operations by the on-chip SCI3 (by clearing the RE and TE
bits to 0 in SCR3), but the adjusted bit rate value remains set in BRR. The transmit data output
pin, TXD, goes to the high-level output state (PCR42 = 1 in port control register 4, P42 = 1 in
port data register 4).
The contents of the CPU's internal general registers are undefined at this time, so these
registers must be initialized immediately after branching to the programming control program.
In particular, since the stack pointer (SP) is used implicitly in subroutine calls, etc., a stack area
must be specified for use by the programming control program.
The initial values of other on-chip registers are not changed.
6. Boot mode can be entered by making the pin settings shown in table 6.5, and then executing a
reset start.
Boot mode can be exited by waiting at least 10 system clock cycles after driving the reset pin
low*2, then setting the FWE, TEST2, and TEST pins to execute reset release*1. Boot mode can
also be exited when a WDT overflow reset occurs.
Do not change the input levels at the FWE, TEST2, and TEST pins while in boot mode. The
FWE pin must not be driven low while the boot program is running or flash memory is being
programmed or erased*3.
7. If the input level of the TEST2, TEST, or FWE pin is changed (for example, from low to high)
during a reset, the MCU's operating mode will change, and as a result, the port states will also
change. Therefore, care must be taken to make pin settings to prevent these pins from
becoming output signal pins during a reset, or to prevent collision with signals outside the
MCU.
Notes: 1. TEST2, TEST, and FWE pin input must satisfy the mode programming setup time (tMDS
= 4 states) with respect to the reset release timing.
2. See section 3.2.2, Reset Sequence, and section 6.9, Flash Memory Programming and
Erasing Precautions.
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6. ROM
3. For further information on FWE application and disconnection, see section 6.9, Flash
Memory Programming and Erasing Precautions.
6.4.2
User Program Mode
When set to user program mode, the chip can program and erase its flash memory by executing a
user programming/erase control program. Therefore, on-board reprogramming of the on-chip flash
memory can be carried out by providing on-board means of FWE control and supply of
programming data, and incorporating a programming/erase control program in part of the program
area as necessary.
To select user program mode, start up in user program mode (TEST2 = 1, TEST = 0), and apply a
high level to the FWE pin. In this mode, on-chip supporting modules other than flash memory
operate as they normally would in user mode.
The flash memory itself cannot be read while the SWE bit is set to 1 to carry out flash memory
programming or erasing, so the control program that performs programming and erasing must be
executed in on-chip RAM.
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Figure 6.11 shows the execution procedure when the programming/erase control program is
transferred to on-chip RAM.
Write FWE assessment program and transfer
program (and programming/erase control
program if necessary) beforehand
TEST2 = 1, TEST = 0
Reset start
Transfer programming/erase
control program to RAM
Branch to programming/erase
control program in RAM area
FWE = high*
Execute programming/erase control
program in RAM (flash memory rewriting)
Release FWE*
Branch to application program
in flash memory
Notes:
Do not apply a constant high level to the FWE pin. A high level should be applied to the
FWE pin only when programming or erasing flash memory. Also, while a high level is
applied to the FWE pin, the watchdog timer should be activated to prevent overprogramming
or overerasing due to program runaway, etc.
* For further information on FWE application and disconnection, see section 6.9, Flash
Memory Programming and Erasing Precautions.
Figure 6.11 User Program Mode Execution Procedure
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6. ROM
6.5
Flash Memory Programming/Erasing
A software method, using the CPU, is employed to program and erase flash memory in the onboard programming modes. There are four flash memory operating modes: program mode, erase
mode, program-verify mode, and erase-verify mode. Transitions to these modes are made by
setting the PSU and ESU bits in FLMCR2, and the P, E, PV, and EV bits in FLMCR1.
The flash memory cannot be read while being programmed or erased. Therefore, the program that
controls flash memory programming/erasing (the programming control program) should be placed
in on-chip RAM, and executed there.
See section 6.9, Flash Memory Programming and Erasing Precautions, for points to note
concerning programming and erasing, and section 15.2.6, Flash Memory Characteristics, for the
wait times after setting or clearing FLMCR1 and FLMCR2 bits.
Notes: 1. Operation is not guaranteed if setting/resetting of the SWE, EV, PV, E, and P bits in
FLMCR1 and the ESU and PSU bits in FLMCR2 is executed by a program in flash
memory.
2. When programming or erasing, set FWE to 1 (programming/erasing will not be
executed if FWE = 0).
3. Programming should be performed in the erased state. Do not perform additional
programming on addresses that have already been programmed.
6.5.1
Program Mode
When writing data or programs to flash memory, the program/program-verify flowchart shown in
figure 6.12 should be followed. Performing programming operations according to this flowchart
will enable data or programs to be written to flash memory without subjecting the device to
voltage stress or sacrificing programming data reliability. Programming should be carried out 32
bytes at a time.
The wait times (x, y, z, α, β, γ, ε, η) after bits are set or cleared in flash memory control register 1
(FLMCR1) and flash memory control register 2 (FLMCR2), and the maximum number of
programming operations (N), are shown in table 15.10 in section 15.2.6, Flash Memory
Characteristics.
Following the elapse of (x) μs or more after the SWE bit is set to 1 in FLMCR1, 32-byte
programming data is stored in the programming data area and the reprogramming data area, and
the 32 bytes of data in the reprogramming data area in RAM are written consecutively to the write
addresses. The lower 8 bits of the first address written to must be H'00, H'20, H'40, H'60, H'80,
H'A0, H'C0, or H'E0. Thirty-two consecutive byte data transfers are performed. The programming
address and programming data are latched in the flash memory. A 32-byte data transfer must be
Rev.3.00 Jul. 19, 2007 page 140 of 532
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6. ROM
performed even if writing fewer than 32 bytes; in this case, H'FF data must be written to the extra
addresses.
Next, the watchdog timer is set to prevent overprogramming in the event of program runaway, etc.
Set a value greater than (y + z + α + β) μs as the WDT overflow period. After this, preparation for
program mode (program setup) is carried out by setting the PSU bit in FLMCR2, and after the
elapse of (y) μs or more, the operating mode is switched to program mode by setting the P bit in
FLMCR1. The time during which the P bit is set is the flash memory programming time. Make a
program setting so that the time for one programming operation is within the range of (z) μs.
6.5.2
Program-Verify Mode
In program-verify mode, the data written in program mode is read to check whether it has been
correctly written in the flash memory.
After the elapse of the given programming time, the programming mode is exited (the P bit in
FLMCR1 is cleared, then the PSU bit in FLMCR2 is cleared at least (α) μs later). The watchdog
timer is cleared following the elapse of more than (y + z + α + β) μs after being set, and the
operating mode is switched to program-verify mode by setting the PV bit in FLMCR1. Before
reading in program-verify mode, a dummy write of H'FF data should be made to the addresses to
be read. The dummy write should be executed after the elapse of (γ) μs or more. When the flash
memory is read in this state (verify data is read in 16-bit units), the data at the latched address is
read. Wait at least (ε) μs after the dummy write before performing this read operation. Next, the
originally written data is compared with the verify data, and reprogramming data is computed (see
figure 6.12) and transferred to the reprogramming data area. After 32 bytes of data have been
verified, exit program-verify mode, wait for at least (η) μs, then clear the SWE bit in FLMCR1. If
reprogramming is necessary, set program mode again, and repeat the program/program-verify
sequence as before. However, ensure that the program/program-verify sequence is not repeated
more than (N) times on the same bits.
Note: A 32-byte area for storing programming data and a 32-byte area for storing
reprogramming data must be provided in RAM.
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6. ROM
START
*1
Set SWE bit in FLMCR1
Wait (x) μs
*6
Store 32-byte programming data in programming
data area and reprogramming data area
*5
n=1
m=0
Consecutively write 32-byte data in repro2
gramming data area in RAM to flash memory *
Enable WDT
Set PSU bit in FLMCR2
Wait (y) μs
*6
Set P bit in FLMCR1
Start of programming
Wait (z) μs
*6
Clear P bit in FLMCR1
End of programming
Wait (α) μs
*6
Clear PSU bit in FLMCR2
n←n+1
Wait (β) μs
*6
Disable WDT
Set PV bit in FLMCR1
Wait (γ) μs
*6
H'FF dummy write to verify address
Wait (ε) μs
*6
Read verify data
*3
Programming data =
verify data?
No
Increment address
m=1
Yes
Reprogramming data computation
*4
Transfer reprogramming data to reprogramming data area *5
No
RAM
32-byte
data verification
completed?
Yes
Clear PV bit in FLMCR1
Programming data
storage area
(32 bytes)
Wait (η) μs
Reprogramming
data storage area
(32 bytes)
*6
*6
No
m = 0?
n ≥ N?
Yes
Clear SWE bit in FLMCR1
Yes
Clear SWE bit in FLMCR1
End of programming
Programming failure
No
Notes: 1. Programming should be performed in the erased state. Do not perform additional programming on addresses that have
already been programmed. (Perform 32-byte programming on memory after all 32 bytes have been erased.)
2. Data transfer is performed by byte transfer (word transfer is not possible). The lower 8 bits of the first address written
to must be H'00, H'20, H'40, H'60, H'80, H'A0, H'C0, or H'E0. A 32-byte data transfer must be performed even if writing
fewer than 32 bytes; in this case, H'FF data must be written to the extra addresses.
3. Verify data is read in 16-bit (word) units.
4. Reprogramming data is determined by the operation shown in the table below (comparison between the data stored
in the programming data area and the verify data). Bits for which the reprogramming data is 0 are programmed in the
next programming loop. Therefore, even bits for which programming has been completed will be subjected to programming
once again if the result of the subsequent verify operation is No.
5. A 32-byte area for storing programming data and a 32-byte area for storing reprogramming data must be provided
in RAM. The contents of the latter are rewritten in accordance with reprogramming data computation.
6. The values of x, y, z, α, β, γ, ε, η, and N are shown in section 15.2.6, Flash Memory Characteristics.
Programming Data
0
0
1
1
Verify Data
0
1
0
1
Reprogramming Data
1
0
1
1
Comments
Programmed bits are not reprogrammed
Programming incomplete; reprogram
⎯
Still in erased state; no action
Note: The memory erased state is "1". Programming is performed on "0" reprogramming data.
Figure 6.12 Program/Program-Verify Flowchart
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6.5.3
Erase Mode
To erase an individual flash memory block, follow the erase/erase-verify flowchart (single-block
erase) shown in figure 6.13.
The wait times (x, y, z, α, β, γ, ε, η) after bits are set or cleared in flash memory control register 1
(FLMCR1) and flash memory control register 2 (FLMCR2), and the maximum number of erase
operations (N), are shown in table 15.10 in section 15.2.6, Flash Memory Characteristics.
To perform data or program erasure, make a 1-bit setting for the flash memory area to be erased in
the erase block register (EBR) at least (x) μs after setting the SWE bit to 1 in flash memory control
register 1 (FLMCR1). Next, set up the watchdog timer to prevent overerasing in the event of
program runaway, etc. Set a value greater than (y + z + α + β) μs as the WDT overflow period.
After this, preparation for erase mode (erase setup) is carried out by setting the ESU bit in
FLMCR2, and after the elapse of (y) μs or more, the operating mode is switched to erase mode by
setting the E bit in FLMCR1. The time during which the E bit is set is the flash memory erase
time. Ensure that the erase time does not exceed (z) ms.
Note: With flash memory erasing, prewriting (setting memory data in the memory to be erased
to all 0) is not necessary before starting the erase procedure.
6.5.4
Erase-Verify Mode
In erase-verify mode, data is read after memory has been erased to check whether it has been
correctly erased.
After the elapse of the erase time, erase mode is exited (the E bit in FLMCR1 is cleared, then the
ESU bit in FLMCR2 is cleared at least (α) μs later). The watchdog timer is cleared following the
elapse of more than (y + z + α + β) μs after being set, and the operating mode is switched to eraseverify mode by setting the EV bit in FLMCR1. Before reading in erase-verify mode, a dummy
write of H'FF data should be made to the addresses to be read. The dummy write should be
executed after the elapse of (y) μs or more. When the flash memory is read in this state (verify
data is read in 16-bit units), the data at the latched address is read. Wait at least (ε) μs after the
dummy write before performing this read operation. If the read data has been erased (all 1),
execute a dummy write to the next address, and perform an erase-verify. If the read data has not
been erased, select erase mode again and repeat the erase/erase-verify sequence as before.
However, ensure that the erase/erase-verify sequence is not repeated more than (N) times.
When verification is completed, exit erase-verify mode, and wait for at least (η) μs. If erasure has
been completed on all the erase blocks, clear the SWE bit in FLMCR1. If there are any unerased
blocks, make a 1-bit setting in EBR for the flash memory block to be erased, and repeat the
erase/erase-verify sequence as before.
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6. ROM
START
*1
Set SWE bit in FLMCR1
Wait (x) μs
*2
n=1
Set EBR
*4
Enable WDT
Set ESU bit in FLMCR2
Wait (y) μs
*2
Start of erase
Set E bit in FLMCR1
*2
Wait (z) ms
Erase halted
Clear E bit in FLMCR1
Wait (α) μs
*2
Clear ESU bit in FLMCR2
Wait (β) μs
*2
Disable WDT
Set EV bit in FLMCR1
Wait (γ) μs
*2
n←n+1
Set block start address
as verify address
H'FF dummy write to verify address
Wait (ε) μs
*2
Read verify data
*3
Increment
address
Verify data =
all 1?
No
Yes
No
Last address
of block?
Yes
Clear EV bit in FLMCR1
Clear EV bit in FLMCR1
Wait (η) μs
Wait (η) μs
*2
No
*5
End of erasing of
all erase blocks?
Yes
Notes: 1.
2.
3.
4.
5.
*2
*2
n ≥ N?
No
Yes
Clear SWE bit in FLMCR1
Clear SWE bit in FLMCR1
End of erasing
Erase failure
Prewriting (setting erase block data to all 1) is not necessary.
The values of x, y, z, α, β, γ, ε, η, and N are shown in section 15.2.6, Flash Memory Characteristics.
Verify data is read in 16-bit (word) units.
Set only one bit in EBR; two or more bits must not be set.
Erasing is performed in block units. To erase multiple blocks, each block must be erased in turn.
Figure 6.13 Erase/Erase-Verify Flowchart (Single-Block Erase)
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6.6
Flash Memory Protection
There are three kinds of flash memory program/erase protection: hardware, software, and error
protection.
6.6.1
Hardware Protection
Hardware protection refers to a state in which programming/erasing of flash memory is forcibly
disabled or aborted. In this state, the settings in flash memory control registers 1 and 2 (FLMCR1,
FLMCR2) and the erase block register (EBR) are reset. (See table 6.7.)
Table 6.7
Hardware Protection
Functions
Verify*1
Item
Description
Program Erase
FWE pin
protection
•
When a low level is input to the FWE pin,
FLMCR1, FLMCR2 (except the FLER bit),
and EBR are initialized, and the
3
program/erase-protected state is entered.*
Not
possible
Not
Not
possible*2 possible
Reset/standby •
protection
In a reset (including a WDT overflow reset)
and in standby mode, FLMCR1, FLMCR2,
and EBR are initialized, and the program/
erase-protected state is entered.
Not
possible
Not
Not
2
possible* possible
•
Notes: 1.
2.
3.
4.
In a reset via the RES pin, the reset state is
not entered unless the RES pin is held low
for a minimum of 40 ms (oscillation
4
stabilization time)* after powering on. In the
case of a reset during operation, hold the
RES pin low for a minimum of 10 system
clock cycles (10φ).
Two modes: program-verify and erase-verify.
All blocks are unerasable and block-by-block specification is not possible.
For details see section 6.9, Flash Memory Programming and Erasing Precautions.
For details see the AC characteristics in sections 15.2.3 and 16.2.3, Electrical
Characteristics.
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6. ROM
6.6.2
Software Protection
Software protection can be implemented by setting the SWE bit in flash memory control register 1
(FLMCR1), and the erase block register (EBR). With software protection, setting the P or E bit in
FLMCR1 does not cause a transition to program mode or erase mode. (See table 6.8.)
Table 6.8
Software Protection
Functions
Item
Description
Program Erase
Verify*1
SWE bit
protection
•
Clearing the SWE bit to 0 in FLMCR1 sets
the program/erase-protected state for all
blocks. (Execute in on-chip RAM.)
Not
possible
Not
possible
Not
possible
Block
protection
•
Individual blocks can be protected from
erasing and programming by settings in the
erase block register (EBR)*2.
⎯
Not
possible
Possible
•
If H'00 is set in EBR, all blocks are protected
from erasing and programming.
Notes: 1. Two modes: program-verify and erase-verify.
2. When not erasing, clear all EBR bits to 0.
6.6.3
Error Protection
In error protection, an error is detected when MCU runaway occurs during flash memory
programming/erasing*1, or operation is not performed in accordance with the program/erase
algorithm, and the program/erase operation is aborted. Aborting the program/erase operation
prevents damage to the flash memory due to overprogramming or overerasing.
If the MCU malfunctions during flash memory programming/erasing, the FLER bit is set to 1 in
FLMCR2 and the error protection state is entered. FLMCR1, FLMCR2, and EBR settings*2 are
retained, but program mode or erase mode is aborted at the point at which the error occurred.
Program mode or erase mode cannot be re-entered by re-setting the P or E bit. However, PV and
EV bit setting is enabled, and a transition can be made to verify mode.
FLER bit setting conditions are as follows:
1. When flash memory is read*3 during programming/erasing (including a vector read or
instruction fetch)
2. Immediately after the start of exception handling (excluding a reset) during
programming/erasing*4
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6. ROM
3. When a SLEEP instruction (including software standby) is executed during
programming/erasing
Error protection is released only by a reset.
Figure 6.14 shows the flash memory state transition diagram.
Notes: 1. This is the state in which the P bit or E bit is set to 1 in FLMCR1.
2. FLMCR1, FLMCR2, and EBR can be written to. However, registers will be initialized
if a transition is made to software standby mode in the error protection state.
3. The read value is undefined.
4. Before exception handling stack and vector read operations are performed.
Program mode
Erase mode
RES = 0
RD VF PR ER FLER = 0
Error
occurrence
Reset
(hardware protection)
Er
(so ror o
ftw cc
ar urr
e s en
tan ce
db
y)
Error protect mode
RD VF PR ER FLER = 1
RD VF PR ER
FLER = 0
S
RE
=0
FLMCR1, FLMCR2,
and EBR initialized
RES = 0
Standby mode
Error protect mode
(standby mode)
Standby mode release
RD VF PR ER INIT
FLER = 1
FLMCR1, FLMCR2 (except FLER bit),
and EBR initialized
Legend:
RD : Memory read possible
VF : Verify-read possible
PR : Programming possible
ER : Erasing possible
RD
VF
PR
ER
INIT
: Memory read not possible
: Verify-read not possible
: Programming not possible
: Erasing not possible
: Register (FLMCR1, FLMCR2, EBR) initialization state
Figure 6.14 Flash Memory State Transitions
The error protection function is invalid for abnormal operations other than the FLER bit setting
conditions. Also, if a certain time has elapsed before this protection state is entered, damage may
already have been caused to the flash memory. Consequently, this function cannot provide
complete protection against damage to flash memory.
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6. ROM
To prevent such abnormal operations, therefore, it is necessary to ensure correct operation in
accordance with the program/erase algorithm, with the flash write enable (FWE) voltage applied,
and to conduct constant monitoring for MCU errors, internally and externally, using the watchdog
timer or other means. There may also be cases where the flash memory is in an erroneous
programming or erroneous erasing state at the point of transition to the protect mode, or where
programming or erasing is not properly carried out because of an abort. In cases such as these, a
forced recovery (program rewrite) must be executed using boot mode. However, it may also
happen that boot mode cannot be normally initiated because of overprogramming or overerasing.
6.7
Interrupt Handling during Flash Memory Programming and Erasing
All interrupts should be disabled when flash memory is being programmed or erased (while the P
or E bit is set in FLMCR1) and while the boot program is executing in boot mode*1, to give
priority to the program or erase operation. There are three reasons for this:
1. Interrupt occurrence during programming or erasing might cause a violation of the
programming or erasing algorithm, with the result that normal operation could not be assured.
2. In the interrupt exception handling sequence during programming or erasing, the vector would
not be read correctly*2, possibly resulting in MCU runaway.
3. If an interrupt occurred during boot program execution, it would not be possible to execute the
normal boot mode sequence.
For these reasons, there are conditions for disabling interrupts in the on-board programming
modes alone, as an exception to the general rule. However, this provision does not guarantee
normal erasing and programming or MCU operation.
All interrupt requests must therefore be disabled inside and outside the MCU when flash memory
is programmed or erased.
Notes: 1. Interrupt requests must be disabled inside and outside the MCU until programming by
the programming control program has been completed.
2. The vector may not be read correctly in this case for the following two reasons:
• If flash memory is read while being programmed or erased (while the P or E bit is
set in FLMCR1), correct read data will not be obtained (undefined values will be
returned).
• If a value has not yet been written in the interrupt vector table, interrupt exception
handling will not be executed correctly.
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6. ROM
6.8
Flash Memory Writer Mode
6.8.1
Writer Mode Setting
Programs and data can be written and erased in Writer mode as well as in the on-board
programming modes. In Writer mode, the on-chip ROM can be freely programmed using a PROM
programmer that supports the Renesas Technology microcomputer device type with 64-kbyte onchip flash memory. Flash memory read mode, auto-program mode, auto-erase mode, and status
read mode are supported with this device type. In auto-program mode, auto-erase mode, and status
read mode, a status polling procedure is used, and in status read mode, detailed internal signals are
output after execution of an auto-program or auto-erase operation.
6.8.2
Socket Adapter and Memory Map
In Writer mode, a socket adapter for the relevant kind of package is attached to the PROM
programmer. The socket adapter performs 144-pin to 32-pin conversion for the HD64F3857, and
100-pin to 32-pin conversion for the HD64F3854. The socket adaptor ptoduct code is given in
table 6.9.
Figure 6.15 shows the memory map in Writer mode, and figures 6.16 (a) and (b) show the socket
adapter pin interconnections for the HD64F3857 and the HD64F3854.
Table 6.9
Socket Adapter Part No.
Part No.
Package
Socket Adapter Part No.
HD64F3857
144-pin TQFP (TFP-144)
Details available from Renesas Sales
144-pin QFP (FP-144H)
HD64F3854
100-pin TQFP (TFP-100G)
100-pin QFP (FP-100B)
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6. ROM
MCU mode
HD64F3857
HD64F3854
H'0000
Writer mode
H'0000
On-chip
ROM area
H'EDFF
H'EDFF
Undefined
values output
H'1FFFF
Figure 6.15 Memory Map in Writer Mode
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6. ROM
Socket Adapter
(32-Pin Conversion)
HD64F3857
HN28F101P (32 Pins)
Pin No.
Pin Name
FP-144H, TFP-144
Pin Name
36
FWE
FWE
1
16
P20
FO0
13
15
P21
FO1
14
14
P22
FO2
15
13
P23
FO3
17
12
P24
FO4
18
11
P25
FO5
19
10
P26
FO6
20
9
P27
FO7
21
53
SEG1
FA0
12
54
SEG2
FA1
11
55
SEG3
FA2
10
56
SEG4
FA3
9
57
SEG5
FA4
8
58
SEG6
FA5
7
59
SEG7
FA6
6
60
SEG8
FA7
5
61
SEG9
FA8
27
62
SEG10
FA9
26
63
SEG11
FA10
23
64
SEG12
FA11
25
65
SEG13
FA12
4
66
SEG14
FA13
28
67
SEG15
FA14
29
68
SEG16
FA15
3
75
SEG23
CE
22
74
SEG22
OE
24
73
SEG21
WE
31
34
VCC
VCC
32
17
AVCC
32
TEST
VSS
16
NC (OPEN)
2, 30
28
X1
4
P54
23
PB5
24
PB6
117
Vci
123
VLCD
29, 124
VSS
26
AVSS
33
TEST2
22
PB4
35
RES
31
OSC1
30
OSC2
Other pins
NC (OPEN)
Power-on reset circuit
Oscillation circuit
Legend:
FWE
FO7 to FO0
FA15 to FA0
OE
CE
WE
: Flash write enable
: Data input/output
: Address input
: Output enable
: Chip enable
: Write enable
Figure 6.16 (a) HD64F3857 Socket Adapter Pin Interconnections
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6. ROM
Socket Adapter
(32-Pin Conversion)
HD64F3854
HN28F101P (32 Pins)
Pin No.
FP-100B, TFP-100G
Pin Name
Pin Name
25
FWE
FWE
1
15
P20
FO0
13
14
P21
FO1
14
13
P22
FO2
15
12
P23
FO3
17
11
P24
FO4
18
10
P25
FO5
19
9
P26
FO6
20
8
P27
FO7
21
46
SEG1
FA0
12
47
SEG2
FA1
11
48
SEG3
FA2
10
49
SEG4
FA3
9
50
SEG5
FA4
8
51
SEG6
FA5
7
52
SEG7
FA6
6
53
SEG8
FA7
5
54
SEG9
FA8
27
55
SEG10
FA9
26
56
SEG11
FA10
23
57
SEG12
FA11
25
58
SEG13
FA12
4
59
SEG14
FA13
28
60
SEG15
FA14
29
61
SEG16
FA15
3
68
SEG23
CE
22
67
SEG22
OE
24
66
WE
31
23
SEG21
VCC
VCC
32
22
TEST
VSS
16
NC (OPEN)
2, 30
18
X1
3
P54
27
PB5
28
PB6
19
VSS
16
TEST2
26
PB4
24
RES
21
OSC1
20
OSC2
Power-on reset circuit
Oscillation circuit
Legend:
FWE
FO7 to FO0
FA15 to FA0
OE
CE
WE
: Flash write enable
: Data input/output
: Address input
: Output enable
: Chip enable
: Write enable
Figure 6.16 (b) HD64F3854 Socket Adapter Pin Interconnections
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6. ROM
6.8.3
Writer Mode Operation
Table 6.10 shows how the different operating modes are set when using Writer mode, and table
6.11 lists the commands used in Writer mode. Details of each mode are given below.
Memory Read Mode: Memory read mode supports byte reads.
Auto-Program Mode: Auto-program mode supports programming of 128 bytes at a time. Status
polling is used to confirm the end of auto-programming.
Auto-Erase Mode: Auto-erase mode supports automatic erasing of the entire flash memory.
Status polling is used to confirm the end of auto-erasing.
Status Read Mode: Status polling is used for auto-programming and auto-erasing, and normal
termination can be confirmed by reading the FO7 signal. In status read mode, error information is
output if an error occurs.
Table 6.10 Settings for Operating Modes In Writer Mode
Pin Names*4
Mode
FWE
CE
OE
WE
FO0 to FO7
FA0 to FA15
Read
H/L
L
L
H
Data output
Ain
Output disable
H/L
L
H
H
Hi-Z
X
L
H
L
Data input
Ain*2
H
X
X
Hi-Z
X
Command write
H/L*
Chip disable*1
H/L
3
Legend:
L:
Low level
H:
High level
X:
Undefined
Hi-Z: High impedance
Notes: 1. Chip disable is not a standby state; internally, it is an operation state.
2. Ain indicates that there is also address input in auto-program mode.
3. For command writes in auto-program and auto-erase modes, input a high level to the
FWE pin.
4. Pin names are those assigned in Writer mode. See figure 6.16 (a) for the H8/3857F,
and figure 6.16 (b) for the H8/3854F.
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6. ROM
Table 6.11 Writer Mode Commands
1st Cycle
2nd Cycle
Command Name
Number of
Cycles
Mode
Address
Data
Mode
Address
Data
Memory read mode
1+n
write
X
H'00
read
RA
Dout
Auto-program mode
129
write
X
H'40
write
WA
Din
Auto-erase mode
2
write
X
H'20
write
X
H'20
Status read mode
3
write
X
H'71
write
X
H'71
Legend:
RA: Read address
WA: Programming address
Dout: Read data
Din: Programming data
Notes: 1. In auto-program mode, 129 cycles are required for command writing by means of a
simultaneous 128-byte write.
2. In memory read mode, the number of cycles depends on the number of address write
cycles (n).
6.8.4
Memory Read Mode
1. After the end of an auto-program, auto-erase, or status read operation, the command wait state
is entered. To read memory contents, a transition must be made to memory read mode by
means of a command write before the read is executed.
2. Command writes can be performed in memory read mode, just as in the command wait state.
3. Once memory read mode has been entered, consecutive reads can be performed.
4. After power-on, memory read mode is entered.
5. Do not make a setting outside the valid address range.
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6. ROM
Table 6.12 AC Characteristics in Memory Read Mode (1)
(Conditions: VCC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Command write cycle
tnxtc
20
⎯
μs
CE hold time
tceh
0
⎯
ns
CE setup time
tces
0
⎯
ns
Data hold time
tdh
50
⎯
ns
Data setup time
tds
50
⎯
ns
Write pulse width
twep
70
⎯
ns
WE rise time
tr
⎯
30
ns
WE fall time
tf
⎯
30
ns
Memory read mode
Command write
ADDRESS
ADDRESS STABLE
CE
OE
WE
DATA
Notes
twep
tceh
tnxtc
tces
tf
tr
H'00
DATA
tdh
tds
Note: Data is latched on the rising edge of WE.
Figure 6.17 Timing Waveforms for Memory Read after Command Write
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6. ROM
Table 6.13 AC Characteristics in Transition from Memory Read Mode to Another Mode
(Conditions: VCC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Command write cycle
tnxtc
20
⎯
μs
CE hold time
tceh
0
⎯
ns
CE setup time
tces
0
⎯
ns
Data hold time
tdh
50
⎯
ns
Data setup time
tds
50
⎯
ns
Write pulse width
twep
70
⎯
ns
WE rise time
tr
⎯
30
ns
WE fall time
tf
⎯
30
ns
Notes
XX mode command write
ADDRESS
ADDRESS STABLE
CE
twep
tnxtc
OE
tces
WE
DATA
tceh
tf
DATA
tr
H'XX
tdh
tds
Note: Do not enable WE and OE simultaneously.
Figure 6.18 Timing Waveforms in Transition from Memory Read Mode to Another Mode
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6. ROM
Table 6.14 AC Characteristics in Memory Read Mode (2)
(Conditions: VCC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Access time
tacc
⎯
20
μs
CE output delay time
tce
⎯
150
ns
OE output delay time
toe
⎯
150
ns
Output disable delay time
tdf
⎯
100
ns
Data output hold time
toh
5
⎯
ns
ADDRESS
ADDRESS STABLE
Notes
ADDRESS STABLE
CE
VIL
OE
VIL
tacc
WE
VIH
tacc
toh
toh
DATA
DATA
DATA
Figure 6.19 Timing Waveforms for CE, OE Enable State Read
ADDRESS
ADDRESS STABLE
ADDRESS STABLE
tacc
CE
OE
WE
DATA
tce
tce
toe
toe
VIH
tdf
tdf
tacc
DATA
DATA
toh
toh
Figure 6.20 Timing Waveforms for CE, OE Clocked Read
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6. ROM
6.8.5
Auto-Program Mode
AC Characteristics
Table 6.15 AC Characteristics in Auto-Program Mode
(Conditions: VCC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Command write cycle
tnxtc
20
⎯
μs
CE hold time
tceh
0
⎯
ns
CE setup time
tces
0
⎯
ns
Data hold time
tdh
50
⎯
ns
Data setup time
tds
50
⎯
ns
Write pulse width
twep
70
⎯
ns
Status polling start time
twsts
1
⎯
ms
Status polling access time
tspa
⎯
150
ns
Address setup time
tas
0
⎯
ns
Address hold time
tah
60
⎯
ns
Memory write time
twrite
1
3000
ms
WE rise time
tr
⎯
30
ns
WE fall time
tf
⎯
30
ns
Write setup time
tpns
100
⎯
ns
Write end setup time
tpnh
100
⎯
ns
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Notes
6. ROM
FWE
tpns
tpnh
ADDRESS
ADDRESS STABLE
CE
tceh
tas
tah
tnxtc
OE
WE
FO7
tnxtc
twep
Data transfer
1 byte ... 128 bytes
tces
tf
twsts
tspa
twrite (1 to 3000ms)
Programming operation
end identification signal
tr
tds
tdh
Programming normal
end identification signal
FO6
Programming wait
DATA
H'40
DATA
DATA
FO0 to 5= 0
Figure 6.21 Auto-Program Mode Timing Waveforms
Notes on Use of Auto-Program Mode
1. In auto-program mode, 128 bytes are programmed simultaneously. This should be carried out
by executing 128 consecutive byte transfers.
2. A 128-byte data transfer is necessary even when programming fewer than 128 bytes. In this
case, H'FF data must be written to the extra addresses.
3. The lower 8 bits of the transfer address must be H'00 or H'80. If a value other than a valid
address is input, processing will switch to a memory write operation but a write error will be
flagged.
4. Memory address transfer is performed in the second cycle (figure 6.20). Do not perform
transfer after the second cycle.
5. Do not perform a command write during a programming operation.
6. Perform one auto-programming operation for a 128-byte block for each address.
Characteristics cannot be guaranteed for two or more programming operations.
7. Confirm normal end of auto-programming by checking FO6. Alternatively, status read mode
can also be used for this purpose (the FO7 status polling pin is used to identify the end of an
auto-program operation).
8. Status polling FO6 and FO7 pin information is retained until the next command write. As long
as the next command write has not been performed, reading is possible by enabling CE and
OE.
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6. ROM
6.8.6
Auto-Erase Mode
AC Characteristics
Table 6.16 AC Characteristics in Auto-Erase Mode
(Conditions: VCC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Command write cycle
tnxtc
20
⎯
μs
CE hold time
tceh
0
⎯
ns
CE setup time
tces
0
⎯
ns
Data hold time
tdh
50
⎯
ns
Data setup time
tds
50
⎯
ns
Write pulse width
twep
70
⎯
ns
Status polling start time
tests
1
⎯
ms
Status polling access time
tspa
⎯
150
ns
Memory erase time
terase
100
40000
ms
WE rise time
tr
⎯
30
ns
WE fall time
tf
⎯
30
ns
Erase setup time
tens
100
⎯
ns
Erase end setup time
tenh
100
⎯
ns
Notes
FWE
tens
tenh
ADDRESS
CE
tces
tceh
tspa
OE
WE
tests
tnxtc
twep
tf
tr
FO7
Erase end identification signal
tdh
Erase normal end
confirmation signal
FO6
DATA
tnxtc
terase (100 to 40000ms)
tds
CLin
DLin
H'20
H'20
FO0 to 5= 0
Figure 6.22 Auto-Erase Mode Timing Waveforms
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6. ROM
Notes on Use of Auto-Erase Mode
1. Auto-erase mode supports only total memory erasing.
2. Do not perform a command write during auto-erasing.
3. Confirm normal end of auto-erasing by checking FO6. Alternatively, status read mode can also
be used for this purpose (the FO7 status polling pin is used to identify the end of an auto-erase
operation).
4. Status polling FO6 and FO7 pin information is retained until the next command write. As long
as the next command write has not been performed, reading is possible by enabling CE and
OE.
6.8.7
Status Read Mode
1. Status read mode is used to identify what type of abnormal end has occurred. Use this mode
when an abnormal end occurs in auto-program mode or auto-erase mode.
2. The return code is retained until a command write for other than status read mode is
performed.
Table 6.17 AC Characteristics in Status Read Mode
(Conditions: VCC = 5.0 V ±10%, VSS = 0 V, Ta = 25°C ±5°C)
Item
Symbol
Min
Max
Unit
Command write cycle
tnxtc
20
⎯
μs
CE hold time
tceh
0
⎯
ns
CE setup time
tces
0
⎯
ns
Data hold time
tdh
50
⎯
ns
Data setup time
tds
50
⎯
ns
Write pulse width
twep
70
⎯
ns
OE output delay time
toe
⎯
150
ns
Disable delay time
tdf
⎯
100
ns
CE output delay time
tce
⎯
150
ns
WE rise time
tr
⎯
30
ns
WE fall time
tf
⎯
30
ns
Notes
Rev.3.00 Jul. 19, 2007 page 161 of 532
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6. ROM
ADDRESS
CE
tnxtc
tce
OE
tnxtc
twep
WE
tces
tceh
tf
tds
DATA
tnxtc
twep
tf
tdf
toe
tceh
tces
tr
tr
tds
tdh
tdh
H'71
H'71
DATA
Note: FO2 and FO3 are undefined.
Figure 6.23 Status Read Mode Timing Waveforms
Table 6.18 Status Read Mode Return Codes
Pin Name
FO7
FO6
FO5
FO4
FO3
FO2
FO1
Attribute
Normal end
identification
Command
error
Programming
error
Erase error
⎯
⎯
Programming Valid address
or erase count error
exceeded
0
0
0
0
0
0
0
Programming
error: 1
Otherwise: 0
Erase error: 1
Otherwise: 0
⎯
⎯
Count
exceeded: 1
Otherwise: 0
Valid address
error: 1
Otherwise: 0
Initial value 0
Indications
Normal end: 0 Command
Abnormal
error: 1
end: 1
Otherwise: 0
FO0
Note: FO2 and FO3 are undefined.
6.8.8
Status Polling
1. The FO7 status polling flag indicates the operating status in auto-program or auto-erase mode.
2. The FO6 status polling flag indicates a normal or abnormal end in auto-program or auto-erase
mode.
Table 6.19 Status Polling Output Truth Table
Pin Names
Internal Operation
in Progress
Abnormal End
Normal Status
Indication
Normal End
FO7
0
1
0
1
FO6
0
0
1
1
FO0 to FO5
0
0
0
0
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6. ROM
6.8.9
Writer Mode Transition Time
Commands cannot be accepted during the oscillation stabilization period or the Writer mode setup
period. A transition is made to memory read mode after the Writer mode setup time.
Table 6.20 Stipulated Transition Times to Command Wait State
Item
Symbol
Min
Max
Unit
Standby release (oscillation stabilization time)
tosc1
40
⎯
ms
Writer mode setup time
tbmv
10
⎯
ms
VCC hold time
tdwn
0
⎯
ms
VCC
tosc1
tbmv
tdwn
Memory read
mode
command
wait state
RES
Notes
Auto-program mode
Auto-erase mode
FWE
Command
Don't care
wait state
Normal/abnormal end
determination
Don't care
Command acceptance
Note: When not in auto-program mode or auto-erase mode, the FWE input pin should be driven low.
Figure 6.24 Oscillation Stabilization Time, Writer Mode Setup, and Power-Down Sequence
6.8.10
Notes on Memory Programming
1. When programming addresses which have previously been programmed, carry out autoerasing before auto-programming.
2. When performing programming using a PROM programmer on a chip that has been
programmed/erased in an on-board programming mode, auto-erasing is recommended before
carrying out auto-programming.
Notes: 1. The memory is initially in the erased state when the device is shipped by Renesas. For
other chips for which the erasure history is unknown, it is recommended that autoerasing be executed to check and supplement the initialization (erase) level.
2. Auto-programming should be performed once only on a particular address block.
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6. ROM
6.9
Flash Memory Programming and Erasing Precautions
Precautions concerning the use of on-board programming mode and Writer mode are summarized
below.
1. Use the specified voltages and timing for programming and erasing.
Applying a voltage in excess of the rating can permanently damage the device. Use a PROM
programmer that supports the Renesas Technology microcomputer device type with 64-kbyte
on-chip flash memory.
Do not select the HN28F101 setting for the PROM programmer, and only use the specified
socket adapter. Incorrect use may damage the device.
2. Powering on and off
Do not apply a high level to the FWE pin until VCC has stabilized. Also, drive the FWE pin low
before turning off VCC.
When applying or disconnecting VCC, fix the FWE pin low and place the flash memory in the
hardware protection state.
The power-on and power-off timing requirements should also be satisfied in the event of a
power failure and subsequent recovery. Failure to do so may result in overprogramming or
overerasing due to MCU runaway, and loss of normal memory cell operation.
3. FWE application/disconnection
FWE application should be carried out when MCU operation is in a stable condition. If MCU
operation is not stable, fix the FWE pin low and set the protection state.
The following points must be observed concerning FWE application and disconnection to
prevent unintentional programming or erasing of flash memory:
a. Apply FWE when the VCC voltage has stabilized within its rated voltage range.
b. Apply FWE when oscillation has stabilized (after the elapse of the oscillation stabilization
time).
c. In boot mode, apply and disconnect FWE during a reset.
d. In user program mode, FWE can be switched between high and low level regardless of the
reset state. FWE input can also be switched during program execution in flash memory.
e. Do not apply FWE if program runaway has occurred.
f. Disconnect FWE only when the SWE, ESU, PSU, EV, PV, P, and E bits in FLMCR1 and
FLMCR2 are cleared.
Make sure that the SWE, ESU, PSU, EV, PV, P, and E bits are not set by mistake when
applying or disconnecting FWE.
Rev.3.00 Jul. 19, 2007 page 164 of 532
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6. ROM
4. Do not apply a constant high level to the FWE pin
To prevent erroneous programming or erasing due to program runaway, etc., apply a high level
to the FWE pin only when programming or erasing flash memory. A system configuration in
which a high level is constantly applied to the FWE pin should be avoided. Also, while a high
level is applied to the FWE pin, the watchdog timer should be activated to prevent
overprogramming or overerasing due to program runaway, etc.
5. Use the recommended algorithm when programming and erasing flash memory
The recommended algorithm enables programming and erasing to be carried out without
subjecting the device to voltage stress or sacrificing program data reliability. When setting the
P or E bit in FLMCR1, the watchdog timer should be set beforehand as a precaution against
program runaway, etc.
6. Do not set or clear the SWE bit during program execution in flash memory
Clear the SWE bit before executing a program or reading data in flash memory. When the
SWE bit is set, data in flash memory can be rewritten, but flash memory should only be
accessed for verify operations (verification during programming/erasing).
7. Do not use interrupts while flash memory is being programmed or erased
All interrupt requests should be disabled during FWE application to give priority to
program/erase operations.
8. Do not perform additional programming. Erase the memory before reprogramming.
In on-board programming, perform only one programming operation on a 32-byte
programming unit block. In Writer mode, perform only one programming operation on a 128byte programming unit block. Programming should be carried out with the entire programming
unit block erased.
9. Before programming, check that the chip is correctly mounted in the PROM programmer.
Overcurrent damage to the device can result if the index marks on the PROM programmer
socket, socket adapter, and chip are not correctly aligned.
10. Do not touch the socket adapter or chip during programming.
Touching either of these can cause contact faults and write errors.
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6. ROM
6.10
Notes when Converting the F-ZTAT Application Software to the
Mask-ROM Versions
Please note the following when converting the F-ZTAT application software to the mask-ROM
versions.
The values read from the internal registers for the flash ROM or the mask-ROM version and
F-ZTAT version differ as follows.
Status
Register
Bit
F-ZTAT Version
Mask-ROM Version
FLMCR1
FWE
0: Application software running
1: Programming
0: Application software running
1: (Not read)
Note: This difference applies to all the F-ZTAT versions and all the mask-ROM versions that have
different ROM size.
Rev.3.00 Jul. 19, 2007 page 166 of 532
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7. RAM
Section 7 RAM
7.1
Overview
The H8/3857 Group and the H8/3854 flash memory version have 2 kbytes of high-speed on-chip
static RAM, and the H8/3854 Group mask ROM version has 1 kbyte. The RAM is connected to
the CPU by a 16-bit data bus, allowing high-speed 2-state access for both byte data and word data.
Note that the H8/3854 flash memory and mask ROM versions have different ROM and RAM
sizes.
7.1.1
Block Diagram
Figure 7.1 shows a block diagram of the on-chip RAM.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'F780*
H'F780
H'F781
H'F782
H'F782
H'F783
On-chip RAM
H'FF7E
H'FF7E
H'FF7F
Even-numbered
address
Odd-numbered
address
Note: * This is the start address for 2-kbyte RAM. With 1-kbyte RAM, the start address is H'FB80
and the RAM area is from H'FB80 to H'FF7E.
Figure 7.1 RAM Block Diagram
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7. RAM
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8. I/O Ports
Section 8 I/O Ports
8.1
Overview
The H8/3857 Group is provided with four 8-bit I/O ports, one 3-bit I/O port, one 8-bit input-only
port, and one 1-bit input-only port. The H8/3854 Group is provided with two 8-bit I/O ports, one
3-bit I/O port, one 5-bit I/O port, one 4-bit input-only port, and one 1-bit input-only port. In
addition, both group have an I/O port capable of interfacing with the on-chip LCD controller.
H8/3857 Group port functions are listed in table 8.1 (a), and H8/3854 Group port functions in
table 8.1 (b).
Each port has a port control register (PCR) that controls input and output, and a port data register
(PDR) for storing output data. Input or output can be assigned to individual bits. See section 2.9.2,
Notes on Bit Manipulation, for information on executing bit-manipulation instructions to write
data in PCR or PDR.
Block diagrams of each port are given in appendix C, I/O Port Block Diagrams.
Rev.3.00 Jul. 19, 2007 page 169 of 532
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8. I/O Ports
Table 8.1 (a)
H8/3857 Group Port Functions
Port
Description
Pins
Other Functions
Function
Switching
Register
Port 1
• 8-bit I/O port
P17 to P15/
IRQ3 to IRQ1/
TMIF, TMIC,
TMIB
External interrupts 3 to 1
PMR1
Timer event input TMIF, TMIC,
TMIB
TCRF,
TMC,
TMB
P14/PWM
14-bit PWM output
PMR1
P13
None
• Input pull-up MOS
option
P12, P11/
Timer F output compare
TMOFH, TMOFL
PMR1
P10/TMOW
Timer A clock output
PMR1
• 8-bit I/O port
P27 to P22
None
• Open drain output
option
P21/UD
Timer C count-up/down selection
PMR2
• High-current port
P20/IRQ4/
ADTRG
External interrupt 4 and A/D
converter external trigger
PMR2
P37 to P33
None
P32/SO1
SCI1 data output (SO1), data input
(SI1), clock input/output (SCK1)
PMR3
• 1-bit input-only port P43/IRQ0
External interrupt 0
PMR2
• 3-bit I/O port
SCI3 data output (TXD), data input
(RXD), clock input/output (SCK3)
SCR3
P57 to P50/
WKP7 to WKP0
Wakeup input (WKP7 to WKP0)
PMR5
Port 9* • 8-bit I/O port
P97 to P90
None
Port A* • 4-bit I/O port
PA3 to PA0
None
PB7 to PB0/
AN7 to AN0
A/D converter analog input
Port 2
Port 3
Port 4
•
8-bit I/O port
• Input pull-up MOS
option
P31/SI1
• High-current port
P30/SCK1
P42/TXD
P41/RXD
AMR
SMR
P40/SCK3
Port 5
• 8-bit I/O port
• Input pull-up MOS
option
Port B
Note:
• 8-bit input port
*
This I/O port is used to interface to the LCD controller.
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AMR
8. I/O Ports
Table 8.1 (b)
H8/3854 Group Port Functions
Port
Description
Pins
Other Functions
Function
Switching
Register
Port 1
• 5-bit I/O port
P17, P15/
IRQ3, IRQ1/
TMIF, TMIB
External interrupts 3, 1
PMR1
Timer event input TMIF, TMIB
TCRF,
TMB
• Input pull-up MOS
option
P12, P11/
Timer F output compare
TMOFH, TMOFL
PMR1
PMR1
P10/TMOW
Timer A clock output
• 8-bit I/O port
P27 to P21
None
• Open drain output
option
P20/IRQ4/
ADTRG
External interrupt 4 and A/D
converter external trigger
PMR2
• 1-bit input-only port P43/IRQ0
External interrupt 0
PMR2
• 3-bit I/O port
SCI3 data output (TXD), data input
(RXD), clock input/output (SCK3)
SCR3
P57 to P50/
WKP7 to WKP0
Wakeup input (WKP7 to WKP0)
PMR5
Port 9* • 8-bit I/O port
P97 to P90
None
Port A* • 4-bit I/O port
PA3 to PA0
None
PB7 to PB4/
AN7 to AN4
A/D converter analog input
Port 2
AMR
• High-current port
Port 4
P42/TXD
P41/RXD
SMR
P40/SCK3
Port 5
• 8-bit I/O port
• Input pull-up MOS
option
Port B
Note:
• 4-bit input port
*
AMR
This I/O port is used to interface to the LCD controller.
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8. I/O Ports
8.2
Port 1
Some port 1 functions differ between the H8/3857 Group and the H8/3854 Group.
The P16/IRQ2/TMIC, P14/PWM, and P13 pins are provided only in the H8/3857 Group, and not in
the H8/3854 Group.
8.2.1
Overview
Port 1 is an 8-bit I/O port. The H8/3857 Group port 1 pin configuration is shown in figure 8.1 (a),
and the H8/3854 Group port 1 pin configuration in figure 8.1 (b).
P1 7 /IRQ 3 /TMIF
P1 6 /IRQ 2 /TMIC
P1 5 /IRQ 1 /TMIB
Port 1
P1 4 /PWM
P1 3
P1 2 /TMOFH
P1 1 /TMOFL
P1 0 /TMOW
Figure 8.1 (a) H8/3857 Group Port 1 Pin Configuration
P17/IRQ3/TMIF
P15/IRQ1/TMIB
Port 1
P12/TMOFH
P11/TMOFL
P10/TMOW
Figure 8.1 (b) H8/3854 Group Port 1 Pin Configuration
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8. I/O Ports
8.2.2
Register Configuration and Description
Table 8.2 shows the port 1 register configuration.
Table 8.2
Port 1 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 1
PDR1
R/W
H'00
H'FFD4
Port control register 1
PCR1
W
H'00
H'FFE4
Port pull-up control register 1
PUCR1
R/W
H'00
H'FFE0
Port mode register 1
PMR1
R/W
H'00
H'FFC8
Port Data Register 1 (PDR1)
PDR1 is an 8-bit register that stores data for pins P17 through P10. If port 1 is read while PCR1 bits
are set to 1, the values stored in PDR1 are read, regardless of the actual pin states. If port 1 is read
while PCR1 bits are cleared to 0, the pin states are read.
Upon reset, PDR1 is initialized to H'00 (H8/3857 Group) or H'58 (H8/3854 Group).
H8/3857 Group
Bit
7
6
5
4
3
2
1
0
P17
P16
P15
P14
P13
P12
P11
P10
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
P17
⎯
P15
⎯
⎯
P12
P11
P10
Initial value
0
1
0
1
1
0
0
0
Read/Write
R/W
⎯
R/W
⎯
⎯
R/W
R/W
R/W
H8/3854 Group
Bit
In the H8/3854 Group, bits 6, 4, and 3 are reserved, and must always be set to 1.
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8. I/O Ports
Port Control Register 1 (PCR1)
PCR1 is an 8-bit register for controlling whether each of the port 1 pins P17 to P10 functions as an
input pin or output pin. Setting a PCR1 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR1 and in PDR1 are valid only
when the corresponding pin is designated in PMR1 as a general I/O pin.
Upon reset, PCR1 is initialized to H'00.
PCR1 is a write-only register. All bits are read as 1.
H8/3857 Group
Bit
7
6
5
4
3
2
1
0
PCR17
PCR16
PCR15
PCR14
PCR13
PCR12
PCR11
PCR10
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
7
6
5
4
3
2
1
0
PCR17
⎯
PCR15
⎯
⎯
PCR12
PCR11
PCR10
H8/3854 Group
Bit
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
⎯
W
⎯
⎯
W
W
W
In the H8/3854 Group, bits 6, 4, and 3 are reserved, and must always be set to 0.
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8. I/O Ports
Port Pull-Up Control Register 1 (PUCR1)
PUCR1 controls whether the MOS pull-up of each port 1 pin is on or off. When a PCR1 bit is
cleared to 0, setting the corresponding PUCR1 bit to 1 turns on the MOS pull-up for the
corresponding pin, while clearing the bit to 0 turns off the MOS pull-up.
Upon reset, PUCR1 is initialized to H'00.
H8/3857 Group
Bit
7
6
5
4
3
2
1
0
PUCR17 PUCR16 PUCR15 PUCR14 PUCR13 PUCR12 PUCR11 PUCR10
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
PUCR17
⎯
PUCR15
⎯
⎯
H8/3854 Group
Bit
PUCR12 PUCR11 PUCR10
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
⎯
R/W
⎯
⎯
R/W
R/W
R/W
In the H8/3854 Group, bits 6, 4, and 3 are reserved, and must always be set to 0.
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8. I/O Ports
Port Mode Register 1 (PMR1)
PMR1 is an 8-bit read/write register, controlling the selection of pin functions for port 1 pins.
Upon reset, PMR1 is initialized to H'00.
H8/3857 Group
Bit
7
6
5
4
3
2
1
0
IRQ3
IRQ2
IRQ1
PWM
⎯
TMOFH
TMOFL
TMOW
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
⎯
R/W
R/W
R/W
7
6
5
4
3
2
1
0
IRQ3
⎯
IRQ1
⎯
⎯
TMOFH
TMOFL
TMOW
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
⎯
R/W
⎯
⎯
R/W
R/W
R/W
H8/3854 Group
Bit
In the H8/3854 Group, bits 6, 4, and 3 are reserved, and must always be set to 0.
Bit 7—P17/IRQ3/TMIF Pin Function Switch (IRQ3): This bit selects whether pin
P17/IRQ3/TMIF is used as P17 or as IRQ3/TMIF.
Bit 7: IRQ3
Description
0
Functions as P17 I/O pin
1
Functions as IRQ3/TMIF input pin
(initial value)
Note: Rising or falling edge sensing can be designated for IRQ3/TMIF.
For details on TMIF pin settings, see Timer Control Register F (TCRF) in section 9.5.2,
Register Descriptions.
Bit 6—P16/IRQ2/TMIC Pin Function Switch (IRQ2): This bit selects whether pin
P16/IRQ2/TMIC is used as P16 or as IRQ2/TMIC.
Bit 6: IRQ2
Description
0
Functions as P16 I/O pin
1
Functions as IRQ2/TMIC input pin
(initial value)
Note: Rising or falling edge sensing can be designated for IRQ2/TMIC.
For details on TMIC pin settings, see Timer Mode Register C (TMC) in section 9.4.2,
Register Descriptions.
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8. I/O Ports
In the H8/3854 Group, bit 6 is reserved, and must always be cleared to 0.
Bit 5—P15/IRQ1/TMIB Pin Function Switch (IRQ1): This bit selects whether pin
P15/IRQ1/TMIB is used as P15 or as IRQ1/TMIB.
Bit 5: IRQ1
Description
0
Functions as P15 I/O pin
1
Functions as IRQ1/TMIB input pin
(initial value)
Note: Rising or falling edge sensing can be designated for IRQ1/TMIB.
For details on TMIB pin settings, see Timer Mode Register B (TMB) in section 9.3.2,
Register Descriptions.
Bit 4—P14/PWM Pin Function Switch (PWM): This bit selects whether pin P14/PWM is used as
P14 or as PWM.
Bit 4: PWM
Description
0
Functions as P14 I/O pin
1
Functions as PWM output pin
(initial value)
In the H8/3854 Group, bit 4 is reserved, and must always be cleared to 0.
Bit 3—Reserved Bit: Bit 3 is reserved; it should always be cleared to 0.
Bit 2—P12/TMOFH Pin Function Switch (TMOFH): This bit selects whether pin P12/TMOFH
is used as P12 or as TMOFH.
Bit 2: TMOFH
Description
0
Functions as P12 I/O pin
1
Functions as TMOFH output pin
(initial value)
Bit 1—P11/TMOFL Pin Function Switch (TMOFL): This bit selects whether pin P11/TMOFL is
used as P11 or as TMOFL.
Bit 1: TMOFL
Description
0
Functions as P11 I/O pin
1
Functions as TMOFL output pin
(initial value)
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8. I/O Ports
Bit 0—P10/TMOW Pin Function Switch (TMOW): This bit selects whether pin P10/TMOW is
used as P10 or as TMOW.
Bit 0: TMOW
Description
0
Functions as P10 I/O pin
1
Functions as TMOW output pin
8.2.3
(initial value)
Pin Functions
H8/3857 Group port 1 pin functions are shown in figure 8.3 (a), and H8/3854 Group port 1 pin
functions in figure 8.3 (b).
Table 8.3 (a)
H8/3857 Group Port 1 Pin Functions
Pin
Pin Functions and Selection Method
P17/IRQ3/TMIF
The pin function depends on bit IRQ3 in PMR1, bits CKSL2 to CKSL0 in TCRF,
and bit PCR17 in PCR1.
IRQ3
0
PCR17
CKSL2 to CKSL0
Pin function
1
0
1
*
Not 0**
***
0**
P17 output pin IRQ3 input pin
P17 input pin
IRQ3/TMIF
input pin
Note: When using as TMIF input pin, clear bit IEN3 in IENR1 to 0, disabling
IRQ3 interrupts.
P16/IRQ2/TMIC
The pin function depends on bit IRQ2 in PMR1, bits TMC2 to TMC0 in TMC, and
bit PCR16 in PCR1.
IRQ2
0
PCR16
0
TMC2 to TMC0
Pin function
1
1
***
P16 input pin
*
Not 111
P16 output pin IRQ2 input pin
111
IRQ2/TMIC
input pin
Note: When using as TMIC input pin, clear bit IEN2 in IENR1 to 0, disabling
IRQ2 interrupts.
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8. I/O Ports
Pin
Pin Functions and Selection Method
P15/IRQ1/TMIB
The pin function depends on bit IRQ1 in PMR1, bits TMB2 to TMB0 in TMB, and
bit PCR15 in PCR1.
IRQ1
PCR15
0
0
TMB2 to TMB0
Pin function
1
1
*
Not 111
***
111
P15 output pin IRQ1 input pin
P15 input pin
IRQ1/TMIB
input pin
Note: When using as TMIB input pin, clear bit IEN1 in IENR1 to 0, disabling
IRQ1 interrupts.
P14/PWM
The pin function depends on bit PWM in PMR1 and bit PCR14 in PCR1.
PWM
PCR14
Pin function
P13
0
0
1
*
P14 input pin
P14 output pin
PWM output pin
The pin function depends on bit PCR13 in PCR1.
PCR13
Pin function
P12/TMOFH
0
1
P13 input pin
P13 output pin
The pin function depends on bit TMOFH in PMR1 and bit PCR12 in PCR1.
TMOFH
PCR12
Pin function
P11/TMOFL
0
1
0
1
*
P12 input pin
P12 output pin
TMOFH output pin
The pin function depends on bit TMOFL in PMR1 and bit PCR11 in PCR1.
TMOFL
PCR11
Pin function
P10/TMOW
1
0
1
0
1
*
P11 input pin
P11 output pin
TMOFL output pin
The pin function depends on bit TMOW in PMR1 and bit PCR10 in PCR1.
TMOW
PCR10
Pin function
0
1
0
1
*
P10 input pin
P10 output pin
TMOW output pin
Legend: * Don't care
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8. I/O Ports
Table 8.3 (b)
H8/3854 Group Port 1 Pin Functions
Pin
Pin Functions and Selection Method
P17/IRQ3/TMIF
The pin function depends on bit IRQ3 in PMR1, bits CKSL2 to CKSL0 in TCRF,
and bit PCR17 in PCR1.
IRQ3
0
PCR17
0
CKSL2 to CKSL0
Pin function
1
1
*
Not 0**
***
0**
P17 output pin IRQ3 input pin
P17 input pin
IRQ3/TMIF
input pin
Note: When using as TMIF input pin, clear bit IEN3 in IENR1 to 0, disabling
IRQ3 interrupts.
P15/IRQ1/TMIB
The pin function depends on bit IRQ1 in PMR1, bits TMB2 to TMB0 in TMB, and
bit PCR15 in PCR1.
IRQ1
0
PCR15
0
TMB2 to TMB0
Pin function
1
1
*
Not 111
***
111
P15 output pin IRQ1 input pin
P15 input pin
IRQ1/TMIB
input pin
Note: When using as TMIB input pin, clear bit IEN1 in IENR1 to 0, disabling
IRQ1 interrupts.
P12/TMOFH
The pin function depends on bit TMOFH in PMR1 and bit PCR12 in PCR1.
TMOFH
0
PCR12
Pin function
P11/TMOFL
0
1
*
P12 input pin
P12 output pin
TMOFH output pin
The pin function depends on bit TMOFL in PMR1 and bit PCR11 in PCR1.
TMOFL
0
PCR11
Pin function
P10/TMOW
1
1
0
1
*
P11 input pin
P11 output pin
TMOFL output pin
The pin function depends on bit TMOW in PMR1 and bit PCR10 in PCR1.
TMOW
0
PCR10
Pin function
1
0
1
*
P10 input pin
P10 output pin
TMOW output pin
Legend: * Don't care
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8. I/O Ports
8.2.4
Pin States
H8/3857 Group port 1 pin states in each operating mode are shown in table 8.4 (a), and H8/3854
Group port 1 pin states in each operating mode in table 8.4 (b).
Table 8.4 (a)
H8/3857 Group Port 1 Pin States
Pins
Reset
P17/IRQ3/TMIF
HighRetains
impedance previous
state
P16/IRQ2/TMIC
P15/IRQ1/TMIB
Sleep
Subsleep Standby
Retains
previous
state
Watch
Subactive Active
HighRetains Functional Functional
impedance* previous
state
P14/PWM
P13
P12/TMOFH
P11/TMOFL
P10/TMOW
Note:
*
A high-level signal is output when the MOS pull-up is in the on state.
Table 8.4 (b)
H8/3854 Group Port 1 Pin States
Pins
Reset
P17/IRQ3/TMIF
HighRetains
impedance previous
state
P15/IRQ1/TMIB
P12/TMOFH
Sleep
Subsleep Standby
Retains
previous
state
Watch
Subactive Active
HighRetains Functional Functional
impedance* previous
state
P11/TMOFL
P10/TMOW
Note:
*
A high-level signal is output when the MOS pull-up is in the on state.
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8. I/O Ports
8.2.5
MOS Input Pull-Up
Port 1 has a built-in MOS input pull-up function that can be controlled by software. When a PCR1
bit is cleared to 0, setting the corresponding PUCR1 bit to 1 turns on the MOS input pull-up for
that pin. The MOS input pull-up function is in the off state after a reset.
0
PCR1n
PUCR1n
MOS input pull-up
1
0
1
*
Off
On
Off
Legend: * Don't care
Notes:
H8/3857 Group: n = 7 to 0
H8/3854 Group: n = 7, 5, 2 to 0
8.3
Port 2
Some port 2 functions differ between the H8/3857 Group and the H8/3854 Group.
The UD function multiplexed with the P21 pin is provided only in the H8/3857 Group, and not in
the H8/3854 Group.
POF1 in PMR2 is also a function of the H8/3857 Group only.
8.3.1
Overview
Port 2 is an 8-bit I/O port. The H8/3857 Group port 2 pin configuration is shown in figure 8.2 (a),
and the H8/3854 Group port 2 pin configuration in figure 8.2 (b).
P2 7
P2 6
P2 5
Port 2
P2 4
P2 3
P2 2
P2 1 /UD
P2 0 /IRQ 4/ADTRG
Figure 8.2 (a) H8/3857 Group Port 2 Pin Configuration
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8. I/O Ports
P2 7
P2 6
P2 5
P2 4
Port 2
P2 3
P2 2
P2 1
P2 0 /IRQ 4/ADTRG
Figure 8.2 (b) H8/3854 Group Port 2 Pin Configuration
8.3.2
Register Configuration and Description
Table 8.5 shows the port 2 register configuration.
Table 8.5
Port 2 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 2
PDR2
R/W
H'00
H'FFD5
Port control register 2
PCR2
W
H'00
H'FFE5
Port mode register 2
PMR2
R/W
H'C0
H'FFC9
Port mode register 4
PMR4
R/W
H'00
H'FFCB
Port Data Register 2 (PDR2)
Bit
7
6
5
4
3
2
1
0
P27
P26
P25
P24
P23
P22
P21
P20
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR2 is an 8-bit register that stores data for pins P27 through P20. If port 2 is read while PCR2 bits
are set to 1, the values stored in PDR2 are read, regardless of the actual pin states. If port 2 is read
while PCR2 bits are cleared to 0, the pin states are read.
Upon reset, PDR2 is initialized to H'00.
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8. I/O Ports
Port Control Register 2 (PCR2)
Bit
7
6
5
4
3
2
1
0
PCR27
PCR26
PCR25
PCR24
PCR23
PCR22
PCR21
PCR20
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
PCR2 is an 8-bit register for controlling whether each of the port 2 pins P27 to P20 functions as an
input pin or output pin. Setting a PCR2 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR2 and in PDR2 are valid only
when the corresponding pin is designated in PMR2 as a general I/O pin.
Upon reset, PCR2 is initialized to H'00.
PCR2 is a write-only register. All bits are read as 1.
Port Mode Register 2 (PMR2)
PMR2 is an 8-bit read/write register, controlling the selection of pin functions for pins P20, P21*,
and P43, controlling the PMOS on/off option for pins P32/SO1*.
Upon reset, PMR2 is initialized to H'C0.
Note: * P21 pin function switching and the P32/SO1 pin are H8/3857 Group functions only, and
are not provided in the H8/3854 Group.
H8/3857 Group
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
IRQ0
POF1
UD
IRQ4
Initial value
1
1
0
0
0
0
0
0
Read/Write
⎯
⎯
R/W
R/W
R/W
R/W
R/W
R/W
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
IRQ0
⎯
⎯
IRQ4
Initial value
1
1
0
0
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
R/W
⎯
⎯
R/W
H8/3854 Group
Bit
In the H8/3854 Group, bits 2 and 1 are reserved, and must always be cleared to 0.
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8. I/O Ports
Bits 7 and 6—Reserved Bits: Bits 7 and 6 are reserved; they are always read as 1, and cannot be
modified.
Bits 5 and 4—Reserved Bits: Bits 5 and 4 are reserved; they should always be cleared to 0.
Bit 3—P43/IRQ0 Pin Function Switch (IRQ0): This bit selects whether pin P43/IRQ0 is used as
P43 or as IRQ0.
Bit 3: IRQ0
Description
0
Functions as P43 input pin
1
Functions as IRQ0 input pin
(initial value)
Note: Rising or falling edge sensing can be selected for the IRQ0 pin.
Bit 2—P32/SO1 Pin PMOS Control (POF1): This bit controls the on/off state of the PMOS
transistor in the P32/SO1 pin output buffer.
Bit 2: POF1
Description
0
CMOS output
1
NMOS open-drain output
(initial value)
In the H8/3854 Group, bit 2 is reserved, and must always be cleared to 0.
Bit 1—P21/UD Pin Function Switch (UD): This bit selects whether pin P21/UD is used as P21 or
as UD.
Bit 1: UD
Description
0
Functions as P21 I/O pin
1
Functions as UD input pin
(initial value)
In the H8/3854 Group, bit 1 is reserved, and must always be cleared to 0.
Bit 0: P20/IRQ4/ADTRG Pin Function Switch (IRQ4): This bit selects whether pin
P20/IRQ4/ADTRG is used as P20 or as IRQ4/ADTRG.
Bit 0: IRQ4
Description
0
Functions as P20 I/O pin
1
Functions as IRQ4/ADTRG input pin
(initial value)
Note: Rising or falling edge sensing can be selected for the IRQ4 pin.
See section 12.3.2, Start of A/D Conversion by External Trigger Input, for the ADTRG pin
setting.
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8. I/O Ports
Port Mode Register 4 (PMR4)
Bit
7
6
5
4
3
2
1
0
NMOD7 NMOD6 NMOD5 NMOD4 NMOD3 NMOD2 NMOD1 NMOD0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PMR4 is an 8-bit read/write register, used to select CMOS output or NMOS open drain output for
each port 2 pin.
Upon reset, PMR4 is initialized to H'00.
Bit n—NMOS Open-Drain Output Select (NMODn): This bit selects NMOS open-drain output
when pin P2n is used as an output pin.
Bit n: NMODn
Description
0
CMOS output
1
NMOS open-drain output
Note: n = 7 to 0
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(initial value)
8. I/O Ports
8.3.3
Pin Functions
H8/3857 Group port 2 pin functions are shown in figure 8.6 (a), and H8/3854 Group port 2 pin
functions in figure 8.6 (b).
Table 8.6 (a)
Pin
P27 to P22
H8/3857 Group Port 2 Pin Functions
Pin Functions and Selection Method
Input or output is selected as follows by the bit settings in PCR2.
PCR2n
Pin function
Note:
P21/UD
0
1
P2n input pin
P2n output pin
n = 7 to 2
The pin function depends on bit UD in PMR2 and bit PCR21 in PCR2.
UD
PCR21
Pin function
0
1
0
1
*
P21 input pin
P21 output pin
UD input pin
P20/IRQ4/ADTRG The pin function depends on bit IRQ4 in PMR2, bit TRGE in AMR, and bit
PCR20 in PCR2.
IRQ4
PCR20
0
0
TRGE
Pin function
1
*
P20 input pin
1
*
0
P20 output pin IRQ4 input pin
1
IRQ4/ADTRG
input pin
Note: When using as ADTRG input pin, clear bit IEN4 in IENR1 to 0, disabling
IRQ4 interrupts.
Legend: * Don't care
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8. I/O Ports
Table 8.6 (b)
H8/3854 Group Port 2 Pin Functions
Pin
Pin Functions and Selection Method
P27 to P21
Input or output is selected as follows by the bit settings in PCR2.
PCR2n
Pin function
Note:
0
1
P2n input pin
P2n output pin
n = 7 to 1
P20/IRQ4/ADTRG The pin function depends on bit IRQ4 in PMR2, bit TRGE in AMR, and bit
PCR20 in PCR2.
IRQ4
0
PCR20
1
0
TRGE
1
*
0
*
Pin function
P20 input pin
P20 output pin IRQ4 input pin
1
IRQ4/ADTRG
input pin
Note: When using as ADTRG input pin, clear bit IEN4 in IENR1 to 0, disabling
IRQ4 interrupts.
Legend: * Don't care
8.3.4
Pin States
H8/3857 Group port 2 pin states in each operating mode are shown in table 8.7 (a), and H8/3854
Group port 2 pin states in each operating mode in table 8.7 (b).
Table 8.7 (a)
H8/3857 Group Port 2 Pin States
Pins
Reset
Sleep
Subsleep
Standby
Watch
P27 to P22
Highimpedance
Retains
previous
state
Retains
previous
state
Highimpedance
Retains Functional Functional
previous
state
P21/UD
Subactive Active
P20/IRQ4/
ADTRG
Table 8.7 (b)
H8/3854 Group Port 2 Pin States
Pins
Reset
Sleep
Subsleep
Standby
Watch
P27 to P21
Highimpedance
Retains
previous
state
Retains
previous
state
Highimpedance
Retains Functional Functional
previous
state
P20/IRQ4/
ADTRG
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Subactive Active
8. I/O Ports
8.4
Port 3 (H8/3857 Group Only)
Port 3 is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
8.4.1
Overview
Port 3 is an 8-bit I/O port, configured as shown in figure 8.3.
P3 7
P3 6
P3 5
P3 4
Port 3
P3 3
P3 2 /SO 1
P3 1 /SI1
P3 0 /SCK1
Figure 8.3 Port 3 Pin Configuration
8.4.2
Register Configuration and Description
Table 8.8 shows the port 3 register configuration.
Table 8.8
Port 3 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 3
PDR3
R/W
H'00
H'FFD6
Port control register 3
PCR3
W
H'00
H'FFE6
Port pull-up control register 3
PUCR3
R/W
H'00
H'FFE1
Port mode register 3
PMR3
R/W
H'00
H'FFCA
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8. I/O Ports
Port Data Register 3 (PDR3)
Bit
7
6
5
4
3
2
1
0
P37
P36
P35
P34
P33
P32
P31
P30
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR3 is an 8-bit register that stores data for port 3 pins P37 to P30. If port 3 is read while PCR3
bits are set to 1, the values stored in PDR3 are read, regardless of the actual pin states. If port 3 is
read while PCR3 bits are cleared to 0, the pin states are read.
Upon reset, PDR3 is initialized to H'00.
Port Control Register 3 (PCR3)
Bit
7
6
5
4
3
2
1
0
PCR37
PCR36
PCR35
PCR34
PCR33
PCR32
PCR31
PCR30
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
PCR3 is an 8-bit register for controlling whether each of the port 3 pins P37 to P30 functions as an
input pin or output pin. Setting a PCR3 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR3 and in PDR3 are valid only
when the corresponding pin is designated in PMR3 as a general I/O pin.
Upon reset, PCR3 is initialized to H'00.
PCR3 is a write-only register. All bits are read as 1.
Port Pull-Up Control Register 3 (PUCR3)
Bit
7
6
5
4
3
2
1
0
PUCR37 PUCR36 PUCR35 PUCR34 PUCR33 PUCR32 PUCR31 PUCR30
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PUCR3 bits control the on/off state of pin P37–P30 MOS pull-ups. When a PCR3 bit is cleared to
0, setting the corresponding PUCR3 bit to 1 turns on the MOS pull-up for the corresponding pin,
while clearing the bit to 0 turns off the MOS pull-up.
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8. I/O Ports
Upon reset, PUCR3 is initialized to H'00.
Port Mode Register 3 (PMR3)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
SO1
SI1
SCK1
Initial value
0
0
0
0
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
PMR3 is an 8-bit read/write register, controlling the selection of pin functions for port 3 pins.
Upon reset, PMR3 is initialized to H'00.
Bits 7 to 3—Reserved Bits: Bits 7 to 3 are reserved; they should always be cleared to 0.
Bit 2—P32/SO1 Pin Function Switch (SO1): This bit selects whether pin P32/SO1 is used as P32 or
as SO1.
Bit 2: SO1
Description
0
Functions as P32 I/O pin
1
Functions as SO1 output pin
(initial value)
Bit 1—P31/SI1 Pin Function Switch (SI1): This bit selects whether pin P31/SI1 is used as P31 or as
SI1.
Bit 1: SI1
Description
0
Functions as P31 I/O pin
1
Functions as SI1 input pin
(initial value)
Bit 0—P30/SCK1 Pin Function Switch (SCK1): This bit selects whether pin P30/SCK1 is used as
P30 or as SCK1.
Bit 0: SCK1
Description
0
Functions as P30 I/O pin
1
Functions as SCK1 I/O pin
(initial value)
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8. I/O Ports
8.4.3
Pin Functions
Table 8.9 shows the port 3 pin functions.
Table 8.9
Port 3 Pin Functions
Pin
Pin Functions and Selection Method
P37 to P33
The pin function depends on the corresponding bit in PCR3.
PCR3n
Pin function
Note:
P32/SO1
0
1
P3n input pin
P3n output pin
n = 7 to 3
The pin function depends on bit SO1 in PMR3 and bit PCR32 in PCR3.
SO1
0
PCR32
Pin function
P31/SI1
0
1
*
P32 input pin
P32 output pin
SO1 output pin
The pin function depends on bit SI1 in PMR3 and bit PCR31 in PCR3.
SI1
0
PCR31
Pin function
P30/SCK1
1
1
0
1
*
P31 input pin
P31 output pin
SI1 input pin
The pin function depends on bit SCK1 in PMR3, bit CKS3 in SCR1, and bit
PCR30 in PCR3.
SCK1
0
CKS3
0
1
0
1
*
*
P30 input
pin
P30 output
pin
SCK1 output
pin
SCK1 input
pin
*
PCR30
Pin function
1
Legend: * Don't care
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8. I/O Ports
8.4.4
Pin States
Table 8.10 shows the port 3 pin states in each operating mode.
Table 8.10 Port 3 Pin States
Pins
Reset
Sleep
Subsleep
Standby
P37 to P33
Highimpedance
Retains
previous
state
Retains
previous
state
HighRetains Functional Functional
impedance* previous
state
P32/SO1
P31/SI1
Watch
Subactive Active
P30/SCK1
Note:
*
8.4.5
A high-level signal is output when the MOS pull-up is in the on state.
MOS Input Pull-Up
Port 3 has a built-in MOS input pull-up function that can be controlled by software. When a PCR3
bit is cleared to 0, setting the corresponding PUCR3 bit to 1 turns on the MOS pull-up for that pin.
The MOS pull-up function is in the off state after a reset.
PCR3n
PUCR3n
MOS input pull-up
0
1
0
1
*
Off
On
Off
Legend: * Don't care
Note:
n = 7 to 0
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8. I/O Ports
8.5
Port 4
Port 4 functions are common to the H8/3857 Group and H8/3854 Group.
8.5.1
Overview
Port 4 consists of a 3-bit I/O port and a 1-bit input port, and is configured as shown in figure 8.4.
P4 3 /IRQ 0
P4 2 /TXD
Port 4
P4 1 /RXD
P4 0 /SCK 3
Figure 8.4 Port 4 Pin Configuration
8.5.2
Register Configuration and Description
Table 8.11 shows the port 4 register configuration.
Table 8.11 Port 4 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 4
PDR4
R/W
H'F8
H'FFD7
Port control register 4
PCR4
W
H'F8
H'FFE7
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8. I/O Ports
Port Data Register 4 (PDR4)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
P43
P42
P41
P40
Initial value
1
1
1
1
Undefined
0
0
0
Read/Write
⎯
⎯
⎯
⎯
R
R/W
R/W
R/W
PDR4 is an 8-bit register that stores data for port 4 pins P42 to P40. If port 4 is read while PCR4
bits are set to 1, the values stored in PDR4 are read, regardless of the actual pin states. If port 4 is
read while PCR4 bits are cleared to 0, the pin states are read.
The pin state is always read from bit 3 (P43).
Upon reset, PDR4 is initialized to H'F8.
Port Control Register 4 (PCR4)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
PCR42
PCR41
PCR40
Initial value
1
1
1
1
1
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
W
W
W
PCR4 controls whether each of the port 4 pins P42 to P40 functions as an input pin or output pin.
Setting a PCR4 bit to 1 makes the corresponding pin an output pin, while clearing the bit to 0
makes the pin an input pin. The settings in PCR4 and in PDR4 are valid only when the
corresponding pin is designated in SCR3 as a general I/O pin.
Upon reset, PCR4 is initialized to H'F8.
PCR4 is a write-only register. All bits are read as 1.
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8. I/O Ports
8.5.3
Pin Functions
Table 8.12 shows the port 4 pin functions.
Table 8.12 Port 4 Pin Functions
Pin
Pin Functions and Selection Method
P43/IRQ0
The pin function depends on the IRQ0 bit setting in PMR2.
IRQ0
Pin function
P42/TXD
0
1
P43 input pin
IRQ0 input pin
The pin function depends on bit TE in SCR3 and bit PCR42 in PCR4.
TE
0
PCR42
Pin function
P41/RXD
0
1
*
P42 input pin
P42 output pin
TXD output pin
The pin function depends on bit RE in SCR3 and bit PCR41 in PCR4.
RE
0
PCR41
Pin function
P40/SCK3
1
1
0
1
*
P41 input pin
P41 output pin
RXD input pin
The pin function depends on bits CKE1 and CKE0 in SCR3, bit COM in SMR,
and bit PCR40 in PCR4.
CKE1
0
CKE0
0
COM
0
PCR40
Pin function
1
1
1
*
*
*
0
1
*
*
P40 input
pin
P40 output
pin
SCK3 output
pin
SCK3 input
pin
Legend: * Don't care
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8. I/O Ports
8.5.4
Pin States
Table 8.13 shows the port 4 pin states in each operating mode.
Table 8.13 Port 4 Pin States
Pins
Reset
Sleep
Subsleep
Standby
Watch
P43/IRQ0
Highimpedance
Retains
previous
state
Retains
previous
state
Highimpedance
Retains Functional Functional
previous
state
P42/TXD
P41/RXD
Subactive Active
P40/SCK3
8.6
Port 5
Port 5 functions are common to the H8/3857 Group and H8/3854 Group.
8.6.1
Overview
Port 5 is an 8-bit I/O port, configured as shown in figure 8.5.
P5 7 /WKP7
P5 6 /WKP6
P5 5 /WKP5
Port 5
P5 4 /WKP4
P5 3 /WKP3
P5 2 /WKP2
P5 1 /WKP1
P5 0 /WKP0
Figure 8.5 Port 5 Pin Configuration
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8. I/O Ports
8.6.2
Register Configuration and Description
Table 8.14 shows the port 5 register configuration.
Table 8.14 Port 5 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 5
PDR5
R/W
H'00
H'FFD8
Port control register 5
PCR5
W
H'00
H'FFE8
Port pull-up control register 5
PUCR5
R/W
H'00
H'FFE2
Port mode register 5
PMR5
R/W
H'00
H'FFCC
Port Data Register 5 (PDR5)
Bit
7
6
5
4
3
2
1
0
P57
P56
P55
P54
P53
P52
P51
P50
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR5 is an 8-bit register that stores data for port 5 pins P57 to P50. If port 5 is read while PCR5
bits are set to 1, the values stored in PDR5 are read, regardless of the actual pin states. If port 5 is
read while PCR5 bits are cleared to 0, the pin states are read.
Upon reset, PDR5 is initialized to H'00.
Port Control Register 5 (PCR5)
Bit
7
6
5
4
3
2
1
0
PCR57
PCR56
PCR55
PCR54
PCR53
PCR52
PCR51
PCR50
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
PCR5 is an 8-bit register for controlling whether each of the port 5 pins P57 to P50 functions as an
input pin or output pin. Setting a PCR5 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR5 is initialized to H'00.
PCR5 is a write-only register. All bits are read as 1.
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8. I/O Ports
Port Pull-up Control Register 5 (PUCR5)
Bit
7
6
5
4
3
2
1
0
PUCR57 PUCR56 PUCR55 PUCR54 PUCR53 PUCR52 PUCR51 PUCR50
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PUCR5 bits control the on/off state of pin P57–P50 MOS pull-ups. When a PCR5 bit is cleared to
0, setting the corresponding PUCR5 bit to 1 turns on the MOS pull-up for the corresponding pin,
while clearing the bit to 0 turns off the MOS pull-up.
Upon reset, PUCR5 is initialized to H'00.
Port Mode Register 5 (PMR5)
Bit
7
6
5
4
3
2
1
0
WKP7
WKP6
WKP5
WKP4
WKP3
WKP2
WKP1
WKP0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PMR5 is an 8-bit read/write register, controlling the selection of pin functions for port 5 pins.
Upon reset, PMR5 is initialized to H'00.
Bit n—P5n/WKPn Pin Function Switch (WKPn): This bit selects whether pin P5n/WKPn is used
as P5n or as WKPn.
Bit n: WKPn
Description
0
Functions as P5n I/O pin
1
Functions as WKPn input pin
(initial value)
Note: n = 7 to 0
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8. I/O Ports
8.6.3
Pin Functions
Table 8.15 shows the port 5 pin functions.
Table 8.15 Port 5 Pin Functions
Pin
Pin Functions and Selection Method
P57/WKP7 to
P50/WKP0
The pin function depends on bit WKPn in PMR5 and bit PCR5n in PCR5.
WKPn
0
PCR5n
Pin function
1
0
1
*
P5n input
pin
P5n output
pin
WKPn input pin
Legend: * Don't care
Note:
n = 7 to 0
8.6.4
Pin States
Table 8.16 shows the port 5 pin states in each operating mode.
Table 8.16 Port 5 Pin States
Pins
Reset
P57/WKP7 to
P50/WKP0
HighRetains
impedance previous
state
Note:
*
8.6.5
Sleep
Subsleep
Standby
Watch
Subactive Active
Retains
previous
state
HighRetains Functional Functional
impedance* previous
state
A high-level signal is output when the MOS pull-up is in the on state.
MOS Input Pull-Up
Port 5 has a built-in MOS input pull-up function that can be controlled by software. When a PCR5
bit is cleared to 0, setting the corresponding PUCR5 bit to 1 turns on the MOS pull-up for that pin.
The MOS pull-up function is in the off state after a reset.
PCR5n
PUCR5n
MOS input pull-up
0
1
0
1
*
Off
On
Off
Legend: * Don't care
Note:
n = 7 to 0
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8. I/O Ports
8.7
Port 9 [Chip-Internal I/O port]
Port 9 functions are common to the H8/3857 Group and H8/3854 Group.
8.7.1
Overview
Port 9 is an 8-bit I/O port that interfaces to the on-chip LCD controller. The port 9 pin
configuration is shown in figure 8.6.
Port 9
P97
DB7
P96
DB6
P95
DB5
P94
DB4
P93
DB3
P92
DB2
P91
DB1
P90
DB0
LCD
controller
Note: Dotted lines indicate connections inside the chip.
Figure 8.6 Port 9 Pin Configuration
8.7.2
Register Configuration and Description
Table 8.17 shows the port 9 register configuration.
Table 8.17 Port 9 Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register 9
PDR9
R/W
H'00
H'FFDC
Port control register 9
PCR9
W
H'00
H'FFEC
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8. I/O Ports
Port Data Register 9 (PDR9)
Bit
7
6
5
4
3
2
1
0
P97
P96
P95
P94
P93
P92
P91
P90
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR9 is an 8-bit register that stores data for port 9 pins P97 to P90. If port 9 is read while PCR9
bits are set to 1, the values stored in PDR9 are read. If port 9 is read while PCR9 bits are cleared to
0, the pin states are read.
Upon reset, PDR9 is initialized to H'00.
Port Control Register 9 (PCR9)
Bit
7
6
5
4
3
2
1
0
PCR97
PCR96
PCR95
PCR94
PCR93
PCR92
PCR91
PCR90
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
PCR9 is an 8-bit register for controlling whether each of the port 9 pins P97 to P90 functions as an
input or output pin. Setting a PCR9 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR9 is initialized to H'00.
PCR9 is a write-only register. All bits are read as 1.
8.7.3
Pin Functions
Table 8.18 shows the port 9 pin functions.
Table 8.18 Port 9 Pin Functions
Pin
Pin Functions and Selection Method
P97 to P90
The pin function depends on the corresponding bit in PCR9.
PCR9n
Pin function
Note: n = 7 to 0
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0
1
P9n input pin
P9n output pin
8. I/O Ports
8.7.4
Pin States
Table 8.19 shows the port 9 pin states in each operating mode.
Table 8.19 Port 9 Pin States
Pins
Reset
P97 to P90
HighRetains
impedance previous
state
8.8
Sleep
Subsleep Standby
Watch
Retains
previous
state
Retains Functional Functional
previous
state
Highimpedance
Subactive Active
Port A [Chip-Internal I/O port]
Port A functions are common to the H8/3857 Group and H8/3854 Group.
8.8.1
Overview
Port A is a 4-bit I/O port that interfaces to the on-chip LCD controller. The port A pin
configuration is shown in figure 8.7.
PA3
Port A
PA2
RS
PA1
R/W
PA0
STRB
LCD
controller
Note: Dotted lines indicate connections inside the chip.
Figure 8.7 Port A Pin Configuration
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8. I/O Ports
8.8.2
Register Configuration and Description
Table 8.20 shows the port A register configuration.
Table 8.20 Port A Registers
Name
Abbr.
R/W
Initial Value
Address
Port data register A
PDRA
R/W
H'F0
H'FFDD
Port control register A
PCRA
W
H'F0
H'FFED
Port Data Register A (PDRA)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
PA3
PA2
PA1
PA0
Initial value
1
1
1
1
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
PDRA is an 8-bit register that stores data for port A pins PA3 to PA0. If port A is read while PCRA
bits are set to 1, the values stored in PDRA are read. If port A is read while PCRA bits are cleared
to 0, the pin states are read.
Upon reset, PDRA is initialized to H'F0.
Port Control Register A (PCRA)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
PCRA3
PCRA2
PCRA1
PCRA0
Initial value
1
1
1
1
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
W
W
W
W
PCRA is an 8-bit register for controlling whether each of the port A pins PA3 to PA0 functions as
an input or output pin. Setting a PCRA bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCRA is initialized to H'F0.
PCRA is a write-only register. All bits are read as 1.
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8. I/O Ports
8.8.3
Pin Functions
Table 8.21 gives the port A pin functions.
Table 8.21 Port A Pin Functions
Pin
Pin Functions and Selection Method
PA3 to PA0
The pin function depends on the corresponding bit in PCRA.
PCRAn
Pin function
0
1
PAn input pin
PAn output pin
Note: n = 3 to 0
8.8.4
Pin States
Table 8.22 shows the port A pin states in each operating mode.
Table 8.22 Port A Pin States
Pins
Reset
Sleep
Subsleep
Standby
Watch
Subactive Active
PA3 to PA0
Highimpedance
Retains
previous
state
Retains
previous
state
Highimpedance
Retains Functional Functional
previous
state
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8. I/O Ports
8.9
Port B
Some port B functions differ between the H8/3857 Group and the H8/3854 Group.
Pins PB3 to PB0/AN3 to AN0 are provided only in the H8/3857 Group, and not in the H8/3854
Group.
8.9.1
Overview
Port B is an 8-bit input-only port. The H8/3857 Group port B pin configuration is shown in figure
8.8 (a), and the H8/3854 Group port B pin configuration in figure 8.8 (b).
PB7 /AN 7
PB6 /AN 6
PB5 /AN 5
Port B
PB4 /AN 4
PB3 /AN 3
PB2 /AN 2
PB1 /AN 1
PB0 /AN 0
Figure 8.8 (a) H8/3857 Group Port B Pin Configuration
PB7/AN7
Port B
PB6/AN6
PB5/AN5
PB4/AN4
Figure 8.8 (b) H8/3854 Group Port B Pin Configuration
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8. I/O Ports
8.9.2
Register Configuration and Description
Table 8.23 shows the port B register configuration.
Table 8.23 Port B Register
Name
Abbr.
R/W
Address
Port data register B
PDRB
R
H'FFDE
Port Data Register B (PDRB)
Reading PDRB always gives the pin states. However, if a port B pin is selected as an analog input
channel for the A/D converter by AMR bits CH3 to CH0, that pin reads 0 regardless of the input
voltage.
H8/3857 Group
Bit
Read/Write
7
6
5
4
3
2
1
0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
R
R
R
R
R
R
R
R
7
6
5
4
3
2
1
0
PB7
PB6
PB5
PB4
⎯
⎯
⎯
⎯
R
R
R
R
⎯
⎯
⎯
⎯
H8/3854 Group
Bit
Read/Write
In the H8/3854 Group, bits 3 to 0 are reserved.
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8. I/O Ports
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9. Timers
Section 9 Timers
9.1
Overview
The H8/3857 Group is provided with four timers (timers A, B, C, and F), and the H8/3854 Group
with three (timers A, B, and F). The H8/3857F and H8/3854F also have an on-chip watchdog
timer for flash memory programming control.
Table 9.1 outlines the functions of timers A, B, C, F, and the watchdog timer.
Table 9.1
Timer Functions
Event
Input Pin
Waveform
Output Pin Remarks
⎯
⎯
⎯
φW/128
(choice of 4
overflow periods)
⎯
Name
Functions
Internal Clock
Timer A
•
•
•
•
8-bit timer
Interval timer
8-bit timer
Time base
φ/8 to φ/8192
(8 choices)
• 8-bit timer
• Clock output
φ/4 to φ/32,
φW/4 to φW/32
(8 choices)
⎯
TMOW
φ/4 to φ/8192
(7 choices)
TMIB
⎯
φ/4 to φ/8192,
φW/4 (7 choices)
TMIC
⎯
φ/2 to φ/32
(4 choices)
TMIF
TMOFL
φ/64 to φ/8192
(8 choices)
⎯
•
•
•
1
Timer C* •
•
•
•
Timer B
Timer F
•
•
•
•
Watchdog •
timer*2
8-bit timer
Interval timer
Event counter
8-bit timer
Interval timer
Event counter
Choice of up- or downcounting
16-bit timer
Event counter
Can be used as two
independent 8-bit
timers
Output compare
Generates reset signal
on overflow of 8-bit
counter
Counting
direction can be
controlled by
software or
hardware
TMOFH
⎯
Provided only in
H8/3857F and
H8/3854F
Notes: 1. Timer C is a function of the H8/3857 Group only, and is not provided in the H8/3854
Group.
2. The watchdog timer is used by the flash memory programming control program.
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9. Timers
9.2
Timer A
9.2.1
Overview
Timer A is an 8-bit timer with interval timing and real-time clock time-base functions. The clock
time-base function is available when a 32.768-kHz crystal oscillator is connected. A clock signal
divided from 32.768 kHz or from the system clock can be output at the TMOW pin.
Features
Features of timer A are given below.
• Choice of eight internal clock sources (φ/8192, φ/4096, φ/2048, φ/512, φ/256, φ/128, φ/32,
φ/8).
• Choice of four overflow periods (1 s, 0.5 s, 0.25 s, 31.25 ms) when timer A is used as a clock
time base (using a 32.768 kHz crystal oscillator).
• An interrupt is requested when the counter overflows.
• Any of eight clock signals can be output from pin TMOW: 32.768 kHz divided by 32, 16, 8, or
4 (1 kHz, 2 kHz, 4 kHz, 8 kHz), or the system clock divided by 32, 16, 8, or 4.
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9. Timers
Block Diagram
Figure 9.1 shows a block diagram of timer A.
TMA
PSW
φW/4
φW/32
φW/16
φW/8
φW/4
φ W/128
TMOW
φ
÷256*
÷64*
φ/8192, φ/4096, φ/2048,
φ/512, φ/256, φ/128,
φ/32, φ/8
÷8*
TCA
φW/32
φW/16
φW/8
φW/4
Internal data bus
1/4
÷128*
φW
PSS
IRRTA
Legend:
TMA: Timer mode register A
TCA: Timer counter A
IRRTA: Timer A overflow interrupt request flag
PSW: Prescaler W
PSS: Prescaler S
Note: * Can be selected only when the prescaler W output (φW/128) is used as the TCA input clock.
Figure 9.1 Block Diagram of Timer A
Pin Configuration
Table 9.2 shows the timer A pin configuration.
Table 9.2
Pin Configuration
Name
Abbr.
I/O
Function
Clock output
TMOW
Output
Output of waveform generated by timer A output
circuit
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9. Timers
Register Configuration
Table 9.3 shows the register configuration of timer A.
Table 9.3
Timer A Registers
Name
Abbr.
R/W
Initial Value
Address
Timer mode register A
TMA
R/W
H'10
H'FFB0
Timer counter A
TCA
R
H'00
H'FFB1
9.2.2
Register Descriptions
Timer Mode Register A (TMA)
Bit
7
6
5
4
3
2
1
0
TMA7
TMA6
TMA5
⎯
TMA3
TMA2
TMA1
TMA0
Initial value
0
0
0
1
0
0
0
0
Read/Write
R/W
R/W
R/W
⎯
R/W
R/W
R/W
R/W
TMA is an 8-bit read/write register for selecting the prescaler, input clock, and output clock.
Upon reset, TMA is initialized to H'10.
Bits 7 to 5—Clock Output Select (TMA7 to TMA5): Bits 7 to 5 choose which of eight clock
signals is output at the TMOW pin. The system clock divided by 32, 16, 8, or 4 can be output in
active mode and sleep mode. A 32.768 kHz signal divided by 32, 16, 8, or 4 can be output in
active mode, sleep mode, and subactive mode.
Bit 7: TMA7
Bit 6: TMA6
Bit 5: TMA5
Clock Output
0
0
0
φ/32
1
φ/16
0
φ/8
1
φ/4
0
φW/32
1
φW/16
0
φW/8
1
φW/4
1
1
0
1
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(initial value)
9. Timers
Bit 4—Reserved Bit: Bit 4 is reserved; it is always read as 1, and cannot be modified.
Bits 3 to 0—Internal Clock Select (TMA3 to TMA0): Bits 3 to 0 select the clock input to TCA.
Description
Bit 3:
TMA3
Bit 2:
TMA2
Bit 1:
TMA1
Bit 0:
TMA0
Prescaler and Divider Ratio
or Overflow Period
Function
0
0
0
0
PSS, φ/8192
Interval timer
1
PSS, φ/4096
0
PSS, φ/2048
1
PSS, φ/512
0
PSS, φ/256
1
PSS, φ/128
1
1
0
1
1
0
0
1
1
0
(initial value)
0
PSS, φ/32
1
PSS, φ/8
0
PSW, 1 s
1
PSW, 0.5 s
0
PSW, 0.25 s
1
PSW, 0.03125 s
0
PSW and TCA are reset
Clock time base
1
1
0
1
Timer Counter A (TCA)
Bit
7
6
5
4
3
2
1
0
TCA7
TCA6
TCA5
TCA4
TCA3
TCA2
TCA1
TCA0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
TCA is an 8-bit read-only up-counter, which is incremented by internal clock input. The clock
source for input to this counter is selected by bits TMA3 to TMA0 in timer mode register A
(TMA). TCA values can be read by the CPU in active mode, but cannot be read in subactive
mode. When TCA overflows, the IRRTA bit in interrupt request register 1 (IRR1) is set to 1.
TCA is cleared by setting bits TMA3 and TMA2 of TMA to 11.
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9. Timers
Upon reset, TCA is initialized to H'00.
9.2.3
Timer Operation
Interval Timer Operation: When bit TMA3 in timer mode register A (TMA) is cleared to 0,
timer A functions as an 8-bit interval timer.
Upon reset, TCA is cleared to H'00 and bit TMA3 is cleared to 0, so up-counting and interval
timing resume immediately. The clock input to timer A is selected by bits TMA2 to TMA0 in
TMA; any of eight internal clock signals output by prescaler S can be selected.
After the count value in TCA reaches H'FF, the next clock signal input causes timer A to
overflow, setting bit IRRTA to 1 in interrupt request register 1 (IRR1). If IENTA = 1 in interrupt
enable register 1 (IENR1), a CPU interrupt is requested.*
At overflow, TCA returns to H'00 and starts counting up again. In this mode timer A functions as
an interval timer that generates an overflow output at intervals of 256 input clock pulses.
Note: * For details on interrupts, see section 3.3, Interrupts.
Real-Time Clock Time Base Operation: When bit TMA3 in TMA is set to 1, timer A functions
as a real-time clock time base by counting clock signals output by prescaler W.
The overflow period of timer A is set by bits TMA1 and TMA0 in TMA. A choice of four periods
is available. In time base operation (TMA3 = 1), setting bit TMA2 to 1 clears both TCA and
prescaler W to their initial values of H'00.
Clock Output: Setting bit TMOW in port mode register 1 (PMR1) to 1 causes a clock signal to be
output at pin TMOW. Eight different clock output signals can be selected by means of bits TMA7
to TMA5 in TMA. The system clock divided by 32, 16, 8, or 4 can be output in active mode and
sleep mode. A 32.768 kHz signal divided by 32, 16, 8, or 4 can be output in active mode, sleep
mode, and subactive mode.
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9. Timers
9.2.4
Timer A Operation States
Table 9.4 summarizes the timer A operation states.
Table 9.4
Timer A Operation States
Watch
Subactive
Subsleep
Standby
Reset
Functions Functions Halted
Halted
Halted
Halted
Reset
Functions Functions Functions Functions Functions Halted
Reset
Functions Retained
Operation Mode
Reset Active
TCA Interval
Clock time base
TMA
Sleep
Retained
Functions Retained
Retained
Note: When real-time clock time base function is selected as the internal clock of TCA in active
mode or sleep mode, the internal clock is not synchronous with the system clock, so it is
synchronized by a synchronizing circuit. This may result in a maximum error of 1/φ (s) in the
count cycle.
9.3
Timer B
9.3.1
Overview
Timer B is an 8-bit timer that increments each time a clock pulse is input. This timer has two
operation modes, interval and auto reload.
Features
Features of timer B are given below.
• Choice of seven internal clock sources (φ/8192, φ/2048, φ/512, φ/256, φ/64, φ/16, φ/4) or an
external clock (can be used to count external events).
• An interrupt is requested when the counter overflows.
Block Diagram
Figure 9.2 shows a block diagram of timer B.
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9. Timers
φ
PSS
TCB
Internal data bus
TMB
TLB
TMIB
IRRTB
Legend:
TMB: Timer mode register B
Timer counter B
TCB:
Timer load register B
TLB:
IRRTB: Timer B overflow interrupt request flag
Prescaler S
PSS:
Figure 9.2 Block Diagram of Timer B
Pin Configuration
Table 9.5 shows the timer B pin configuration.
Table 9.5
Pin Configuration
Name
Abbr.
I/O
Function
Timer B event input
TMIB
Input
Event input to TCB
Register Configuration
Table 9.6 shows the register configuration of timer B.
Table 9.6
Timer B Registers
Name
Abbr.
R/W
Initial Value
Address
Timer mode register B
TMB
R/W
H'78
H'FFB2
Timer counter B
TCB
R
H'00
H'FFB3
Timer load register B
TLB
W
H'00
H'FFB3
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9. Timers
9.3.2
Register Descriptions
Timer Mode Register B (TMB)
Bit
7
6
5
4
3
2
1
0
TMB7
⎯
⎯
⎯
⎯
TMB2
TMB1
TMB0
Initial value
0
1
1
1
1
0
0
0
Read/Write
R/W
⎯
⎯
⎯
⎯
R/W
R/W
R/W
TMB is an 8-bit read/write register for selecting the auto-reload function and input clock.
Upon reset, TMB is initialized to H'78.
Bit 7—Auto-Reload Function Select (TMB7): Bit 7 selects whether timer B is used as an
interval timer or auto-reload timer.
Bit 7: TMB7
Description
0
Interval timer function selected
1
Auto-reload function selected
(initial value)
Bits 6 to 3—Reserved Bits: Bits 6 to 3 are reserved; they always read 1, and cannot be modified.
Bits 2 to 0—Clock Select (TMB2 to TMB0): Bits 2 to 0 select the clock input to TCB. For
external event counting, either the rising or falling edge can be selected.
Bit 2: TMB2
Bit 1: TMB1
Bit 0: TMB0
Description
0
0
0
Internal clock: φ/8192
1
Internal clock: φ/2048
0
Internal clock: φ/512
1
Internal clock: φ/256
0
Internal clock: φ/64
1
Internal clock: φ/16
0
Internal clock: φ/4
1
External event (TMIB): rising or falling edge*
1
1
0
1
Note:
*
(initial value)
The edge of the external event signal is selected by bit IEG1 in the IRQ edge select
register (IEGR). See section 3.3.2, Interrupt Control Registers, for details on the IRQ
edge select register. Be sure to set bit IRQ1 in port mode register 1 (PMR1) to 1 before
setting bits TMB2 to TMB0 to 111.
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9. Timers
Timer Counter B (TCB)
Bit
7
6
5
4
3
2
1
0
TCB7
TCB6
TCB5
TCB4
TCB3
TCB2
TCB1
TCB0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
TCB is an 8-bit read-only up-counter, which is incremented by internal clock or external event
input. The clock source for input to this counter is selected by bits TMB2 to TMB0 in timer mode
register B (TMB). TCB values can be read by the CPU at any time.
When TCB overflows from H'FF to H'00 or to the value set in TLB, the IRRTB bit in interrupt
request register 2 (IRR2) is set to 1.
TCB is allocated to the same address as timer load register B (TLB).
Upon reset, TCB is initialized to H'00.
Timer Load Register B (TLB)
Bit
7
6
5
4
3
2
1
0
TLB7
TLB6
TLB5
TLB4
TLB3
TLB2
TLB1
TLB0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
TLB is an 8-bit write-only register for setting the reload value of timer counter B.
When a reload value is set in TLB, the same value is loaded into timer counter B (TCB) as well,
and TCB starts counting up from that value. When TCB overflows during operation in auto-reload
mode, the TLB value is loaded into TCB. Accordingly, overflow periods can be set within the
range of 1 to 256 input clocks.
The same address is allocated to TLB as to TCB.
Upon reset, TLB is initialized to H'00.
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9. Timers
9.3.3
Timer Operation
Interval timer Operation: When bit TMB7 in timer mode register B (TMB) is cleared to 0, timer
B functions as an 8-bit interval timer.
Upon reset, TCB is cleared to H'00 and bit TMB7 is cleared to 0, so up-counting and interval
timing resume immediately. The clock input to timer B is selected from seven internal clock
signals output by prescaler S, or an external clock input at pin TMIB. The selection is made by
bits TMB2 to TMB0 of TMB.
After the count value in TCB reaches H'FF, the next clock signal input causes timer B to overflow,
setting bit IRRTB to 1 in interrupt request register 2 (IRR2). If IENTB = 1 in interrupt enable
register 2 (IENR2), a CPU interrupt is requested.*
At overflow, TCB returns to H'00 and starts counting up again.
During interval timer operation (TMB7 = 0), when a value is set in timer load register B (TLB),
the same value is set in TCB.
Note: * For details on interrupts, see section 3.3, Interrupts.
Auto-Reload Timer Operation: Setting bit TMB7 in TMB to 1 causes timer B to function as an
8-bit auto-reload timer. When a reload value is set in TLB, the same value is loaded into TCB,
becoming the value from which TCB starts its count.
After the count value in TCB reaches H'FF, the next clock signal input causes timer B to overflow.
The TLB value is then loaded into TCB, and the count continues from that value. The overflow
period can be set within a range from 1 to 256 input clocks, depending on the TLB value.
The clock sources and interrupts in auto-reload mode are the same as in interval mode.
In auto-reload mode (TMB7 = 1), when a new value is set in TLB, the TLB value is also set in
TCB.
Event Counter Operation: Timer B can operate as an event counter, counting rising or falling
edges of an external event signal input at pin TMIB. External event counting is selected by setting
bits TMB2 to TMB0 in timer mode register B to all 1s (111).
When timer B is used to count external event input, bit IRQ1 in port mode register 1 (PMR1)
should be set to 1, and bit IEN1 in interrupt enable register 1 (IENR1) should be cleared to 0 to
disable IRQ1 interrupt requests.
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9. Timers
9.3.4
Timer B Operation States
Table 9.7 summarizes the timer B operation states.
Table 9.7
Timer B Operation States
Operation Mode
Reset
Active
Sleep
Watch
Subactive
Subsleep
Standby
TCB Interval
Reset
Functions
Functions
Halted
Halted
Halted
Halted
Reset
Functions
Functions
Halted
Halted
Halted
Halted
Reset
Functions
Retained
Retained
Retained
Retained
Retained
Auto reload
TMB
9.4
Timer C (H8/3857 Group Only)
9.4.1
Overview
Timer C is an 8-bit timer that increments or decrements each time a clock pulse is input. This
timer has two operation modes, interval and auto reload.
Timer C is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
Features
The main features of timer C are given below.
• Choice of seven internal clock sources (φ/8192, φ/2048, φ/512, φ/64, φ/16, φ/4, φW/4) or an
external clock (can be used to count external events).
• An interrupt is requested when the counter overflows.
• Can be switched between up- and down-counting by software or hardware.
• When φW/4 is selected as the internal clock source, or when an external clock is selected, timer
C can function in subactive mode and subsleep mode.
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9. Timers
Block Diagram
Figure 9.3 shows a block diagram of timer C.
UD
φ
TCC
PSS
Internal data bus
TMC
TMIC
φW/4
TLC
IRRTC
Legend:
TMC: Timer mode register C
TCC: Timer counter C
Timer load register C
TLC:
IRRTC: Timer C overflow interrupt request flag
PSS: Prescaler S
Figure 9.3 Block Diagram of Timer C
Pin Configuration
Table 9.8 shows the timer C pin configuration.
Table 9.8
Pin Configuration
Name
Abbr.
I/O
Function
Timer C event input
TMIC
Input
Event input to TCC
Timer C up/down control
UD
Input
Selection of counting direction
Register Configuration
Table 9.9 shows the register configuration of timer C.
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9. Timers
Table 9.9
Timer C Registers
Name
Abbr.
R/W
Initial Value
Address
Timer mode register C
TMC
R/W
H'18
H'FFB4
Timer counter C
TCC
R
H'00
H'FFB5
Timer load register C
TLC
W
H'00
H'FFB5
9.4.2
Register Descriptions
Timer Mode Register C (TMC)
Bit
7
6
5
4
3
2
1
0
TMC7
TMC6
TMC5
⎯
⎯
TMC2
TMC1
TMC0
Initial value
0
0
0
1
1
0
0
0
Read/Write
R/W
R/W
R/W
⎯
⎯
R/W
R/W
R/W
TMC is an 8-bit read/write register for selecting the auto-reload function, counting direction, and
input clock.
Upon reset, TMC is initialized to H'18.
Bit 7—Auto-Reload Function Select (TMC7): Bit 7 selects whether timer C is used as an
interval timer or auto-reload timer.
Bit 7: TMC7
Description
0
Interval timer function selected
1
Auto-reload function selected
(initial value)
Bits 6 and 5—Counter Up/Down Control (TMC6, TMC5): These bits select the counting
direction of timer counter C (TCC), or allow hardware to control the counting direction using pin
UD.
Bit 6: TMC6
Bit 5: TMC5
Description
0
0
TCC is an up-counter
1
TCC is a down-counter
*
TCC up/down control is determined by input at pin UD.
TCC is a down-counter if the UD input is high, and an upcounter if the UD input is low.
1
Legend: * Don't care
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(initial value)
9. Timers
Bits 4 and 3—Reserved Bits: Bits 4 and 3 are reserved; they are always read as 1, and cannot be
modified.
Bits 2 to 0—Clock Select (TMC2 to TMC0): Bits 2 to 0 select the clock input to TCC. For
external clock counting, either the rising or falling edge can be selected.
Bit 2: TMC2
Bit 1: TMC1
Bit 0: TMC0
Description
0
0
0
Internal clock: φ/8192
1
Internal clock: φ/2048
0
Internal clock: φ/512
1
Internal clock: φ/64
1
1
0
1
Note:
*
(initial value)
0
Internal clock: φ/16
1
Internal clock: φ/4
0
Internal clock: φW/4
1
External event (TMIC): rising or falling edge*
The edge of the external event signal is selected by bit IEG2 in the IRQ edge select
register (IEGR). See section 3.3.2, Interrupt Control Registers for details on the IRQ
edge select register. Be sure to set bit IRQ2 in port mode register 1 (PMR1) to 1 before
setting bits TMC2 to TMC0 to 111.
Timer Counter C (TCC)
Bit
7
6
5
4
3
2
1
0
TCC7
TCC6
TCC5
TCC4
TCC3
TCC2
TCC1
TCC0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
TCC is an 8-bit read-only up-/down-counter, which is incremented or decremented by internal or
external clock input. The clock source for input to this counter is selected by bits TMC2 to TMC0
in timer mode register C (TMC). TCC values can be read by the CPU at any time.
When TCC overflows (from H'FF to H'00 or to the value set in TLC) or underflows (from H'00 to
H'FF or to the value set in TLC), the IRRTC bit in interrupt request register 2 (IRR2) is set to 1.
TCC is allocated to the same address as timer load register C (TLC).
Upon reset, TCC is initialized to H'00.
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9. Timers
Timer Load Register C (TLC)
Bit
7
6
5
4
3
2
1
0
TLC7
TLC6
TLC5
TLC4
TLC3
TLC2
TLC1
TLC0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
TLC is an 8-bit write-only register for setting the reload value of TCC.
When a reload value is set in TLC, the same value is loaded into timer counter C (TCC) as well,
and TCC starts counting up or down from that value. When TCC overflows or underflows during
operation in auto-reload mode, the TLC value is loaded into TCC. Accordingly, overflow and
underflow periods can be set within the range of 1 to 256 input clocks.
The same address is allocated to TLC as to TCC.
Upon reset, TLC is initialized to H'00.
9.4.3
Timer Operation
Interval Timer Operation: When bit TMC7 in timer mode register C (TMC) is cleared to 0,
timer C functions as an 8-bit interval timer.
Upon reset, timer counter C (TCC) is initialized to H'00 and TMC to H'18. After a reset, the
counter continues uninterrupted incrementing as an interval up-counter. The clock input to timer C
is selected from seven internal clock signals output by prescalers S and W, or an external clock
input at pin TMIC. The selection is made by bits TMC2 to TMC0 in TMC.
Either software or hardware can control whether TCC counts up or down. The selection is made
by TMC bits TMC6 and TMC5.
After the count value in TCC reaches H'FF (H'00), the next clock signal input causes timer C to
overflow (underflow), setting bit IRRTC to 1 in interrupt request register 2 (IRR2). If IENTC = 1
in interrupt enable register 2 (IENR2), a CPU interrupt is requested.*
At overflow or underflow, TCC returns to H'00 or H'FF and starts counting up or down again.
During interval timer operation (TMC7 = 0), when a value is set in timer load register C (TLC),
the same value is set in TCC.
Note: * For details on interrupts, see section 3.3, Interrupts.
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9. Timers
Auto-Reload Timer Operation: Setting bit TMC7 in TMC to 1 causes timer C to function as an
8-bit auto-reload timer. When a reload value is set in TLC, the same value is loaded into TCC,
becoming the value from which TCC starts its count.
After the count value in TCC reaches H'FF (H'00), the next clock signal input causes timer C to
overflow (underflow). The TLC value is then loaded TCC, and the count continues from that
value. The overflow (underflow) period can be set within a range from 1 to 256 input clocks,
depending on the TLC value.
The clock sources, up/down control, and interrupts in auto-reload mode are the same as in interval
mode.
In auto-reload mode (TMC7 = 1), when a new value is set in TLC, the TLC value is also set in
TCC.
Event Counter Operation: Timer C can operate as an event counter, counting an event signal
input at pin TMIC. External event counting is selected by setting TMC bits TMC2 to TMC0 to all
1s (111). TCC counts up or down at the rising or falling edge of the input at pin TMIC.
When timer C is used to count external event inputs, bit IRQ2 in port mode register 1 (PMR1)
should be set to 1, and bit IEN2 in interrupt enable register 1 (IENR1) should be cleared to 0 to
disable IRQ2 interrupt requests.
TCC Up/Down Control by Hardware: The counting direction of timer C can be controlled by
input at pin UD. When bit TMC6 in TMC is set to 1, high-level input at the UD pin selects downcounting, while low-level input selects up-counting.
When using input at pin UD for this control function, set the UD bit in port mode register 2
(PMR2) to 1.
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9. Timers
9.4.4
Timer C Operation States
Table 9.10 summarizes the timer C operation states.
Table 9.10 Timer C Operation States
Subactive
Subsleep
Halted
Functions/
Halted*
Functions/ Halted
Halted*
Functions
Halted
Functions/
Halted*
Functions/ Halted
Halted*
Retained
Retained
Functions
Retained
Operation Mode
Reset Active
Sleep
Watch
TCC
Interval
Reset Functions
Functions
TCC
Auto
reload
Reset Functions
Reset Functions
TMC
Note:
*
Standby
Retained
When φW/4 is selected as the internal clock of TCC in active mode or sleep mode, the
internal clock is not synchronous with the system clock, so it is synchronized by a
synchronizing circuit. This may result in a maximum error of 1/φ (s) in the count cycle.
When timer C is operated in subactive mode or subsleep mode, either an external clock
or the φW/4 internal clock must be selected. The counter will not operate in these modes
if another clock is selected. If the internal φW/4 clock is selected when φW/8 is being used
as the subclock φSUB, the lower 2 bits of the counter will operate on the same cycle, with
the least significant bit not being counted.
9.5
Timer F
9.5.1
Overview
Timer F is a 16-bit timer with an output compare function. Compare match signals can be used to
reset the counter, request an interrupt, or toggle the output. Timer F can also be used for external
event counting, and can operate as two independent 8-bit timers, timer FH and timer FL.
Features
Features of timer F are given below.
• Choice of four internal clock sources (φ/32, φ/16, φ/4, φ/2) or an external clock (can be used as
an external event counter).
• Output from pin TMOFH is toggled by one compare match signal (the initial value of the
toggle output can be set).
• Counter can be reset by the compare match signal.
• Two interrupt sources: counter overflow and compare match.
• Can operate as two independent 8-bit timers (timer FH and timer FL) in 8-bit mode.
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9. Timers
Timer FH
• 8-bit timer (clocked by timer FL overflow signals when timer F operates as a 16-bit timer).
• Choice of four internal clocks (φ/32, φ/16, φ/4, φ/2).
• Output from pin TMOFH is toggled by one compare match signal (the initial value of the
toggle output can be set).
• Counter can be reset by the compare match signal.
• Two interrupt sources: counter overflow and compare match.
Timer FL
• 8-bit timer/event counter
• Choice of four internal clocks (φ/32, φ/16, φ/4, φ/2) or event input at pin TMIF.
• Output from pin TMOFL is toggled by one compare match signal (the initial value of the
toggle output can be set).
• Counter can be reset by the compare match signal.
• Two interrupt sources: counter overflow and compare match.
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9. Timers
Block Diagram
Figure 9.4 shows a block diagram of timer F.
φ
PSS
IRRTFL
TCRF
TCFL
TMIF
Toggle
circuit
Compare circuit
Internal data bus
TMOFL
OCRFL
TCFH
TMOFH
Toggle
circuit
Compare circuit
Match
OCRFH
TCSRF
Legend:
TCRF:
TCSRF:
TCFH:
TCFL:
OCRFH:
OCRFL:
IRRTFH:
IRRTFL:
PSS:
Timer control register F
Timer control status register F
8-bit timer counter FH
8-bit timer counter FL
Output compare register FH
Output compare register FL
Timer FH interrupt request flag
Timer FL interrupt request flag
Prescaler S
Figure 9.4 Block Diagram of Timer F
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IRRTFH
9. Timers
Pin Configuration
Table 9.11 shows the timer F pin configuration.
Table 9.11 Pin Configuration
Name
Abbr.
I/O
Function
Timer F event input
TMIF
Input
Event input to TCFL
Timer FH output
TMOFH
Output
Timer FH toggle output
Timer FL output
TMOFL
Output
Timer FL toggle output
Register Configuration:
Table 9.12 shows the register configuration of timer F.
Table 9.12 Timer F Registers
Name
Abbr.
R/W
Initial Value
Address
Timer control register F
TCRF
W
H'00
H'FFB6
Timer control/status register F
TCSRF
R/W
H'00
H'FFB7
8-bit timer counter FH
TCFH
R/W
H'00
H'FFB8
8-bit timer counter FL
TCFL
R/W
H'00
H'FFB9
Output compare register FH
OCRFH
R/W
H'FF
H'FFBA
Output compare register FL
OCRFL
R/W
H'FF
H'FFBB
9.5.2
Register Descriptions
16-Bit Timer Counter (TCF)
8-Bit Timer Counter (TCFH)
8-Bit Timer Counter (TCFL)
TCF
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Initial value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
←
TCFH
→←
TCFL
→
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9. Timers
TCF is a 16-bit read/write up-counter consisting of two cascaded 8-bit timer counters, TCFH and
TCFL. TCF can be used as a 16-bit counter, with TCFH as the upper 8 bits and TCFL as the lower
8 bits of the counter, or TCFH and TCFL can be used as independent 8-bit counters.
TCFH and TCFL can be read and written by the CPU, but in 16-bit mode, data transfer with the
CPU takes place via a temporary register (TEMP). For details see section 9.5.3, Interface with the
CPU.
Upon reset, TCFH and TCFL are each initialized to H'00.
• 16-bit mode (TCF)
16-bit mode is selected by clearing bit CKSH2 to 0 in timer control register F (TCRF). The
TCF input clock is selected by TCRF bits CKSL2 to CKSL0.
TCFH can be cleared by a compare match signal. This designation is made in bit CCLRH in
TCSRF.
When TCF overflows from H'FFFF to H'0000, the overflow flag (OVFH) in TCSRF is set to 1.
If bit OVIEH in TCSRF is set to 1 when an overflow occurs, bit IRRTFH in interrupt request
register 2 (IRR2) will be set to 1; and if bit IENTFH in interrupt enable register 2 (IENR2) is
set to 1, a CPU interrupt will be requested.
• 8-bit mode (TCFH, TCFL)
When bit CKSH2 in timer control register F (TCRF) is set to 1, timer F functions as two
separate 8-bit counters, TCFH and TCFL. The TCFH (TCFL) input clock is selected by TCRF
bits CKSH2 to CKSH0 (CKSL2 to CKSL0).
TCFH (TCFL) can be cleared by a compare match signal. This designation is made in bit
CCLRH (CCLRL) in TCSRF.
When TCFH (TCFL) overflows from H'FF to H'00, the overflow flag OVFH (OVFL) in
TCSRF is set to 1. If bit OVIEH (OVIEL) in TCSRF is set to 1 when an overflow occurs, bit
IRRTFH (IRRTHL) in interrupt request register 2 (IRR2) will be set to 1; and if bit IENTFH
(IENTFL) in interrupt enable register 2 (IENR2) is set to 1, a CPU interrupt will be requested.
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9. Timers
16-Bit Output Compare Register (OCRF)
8-Bit Output Compare Register (OCRFH)
8-Bit Output Compare Register (OCRFL)
OCRF
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Initial value
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
←
OCRFH
→←
OCRFL
→
OCRF is a 16-bit read/write output compare register consisting of two 8-bit read/write registers
OCRFH and OCRFL. It can be used as a 16-bit output compare register, with OCRFH as the
upper 8 bits and OCRFL as the lower 8 bits of the register, or OCRFH and OCRFL can be used as
independent 8-bit registers.
OCRFH and OCRFL can be read and written by the CPU, but in 16-bit mode, data transfer with
the CPU takes place via a temporary register (TEMP). For details see section 9.5.3, Interface with
the CPU.
Upon reset, OCRFH and OCRFL are each initialized to H'FF.
• 16-bit mode (OCRF)
16-bit mode is selected by clearing bit CKSH2 to 0 in timer control register F (TCRF). The
OCRF contents are always compared with the 16-bit timer counter (TCF). When the contents
match, the compare match flag (CMFH) in TCSRF is set to 1. Also, IRRTFH in interrupt
request register 2 (IRR2) is set to 1. If bit IENTFH in interrupt enable register 2 (IENR2) is set
to 1, a CPU interrupt is requested.
Output for pin TMOFH can be toggled by compare match. The output level can also be set to
high or low by bit TOLH of timer control register F (TCRF).
• 8-bit mode (OCRFH, OCRFL)
Setting bit CKSH2 in TCRF to 1 results in two 8-bit registers, OCRFH and OCRFL.
The OCRFH contents are always compared with TCFH, and the OCRFL contents are always
compared with TCFL. When the contents match, the compare match flag (CMFH or CMFL) in
TCSRF is set to 1. Also, bit IRRTFH (IRRTFL) in interrupt request register 2 (IRR2) set to 1.
If bit IENTFH (IENTFL) in interrupt enable register 2 (IENR2) is set to 1 at this time, a CPU
interrupt is requested.
The output at pin TMOFH (TMOFL) can be toggled by compare match. The output level can
also be set to high or low by bit TOLH (TOLL) of the timer control register (TCRF).
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9. Timers
Timer Control Register F (TCRF)
Bit
7
6
5
4
3
2
1
0
TOLH
CKSH2
CKSH1
CKSH0
TOLL
CKSL2
CKSL1
CKSL0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
TCRF is an 8-bit write-only register. It is used to switch between 16-bit mode and 8-bit mode, to
select among four internal clocks and an external clock, and to select the output level at pins
TMOFH and TMOFL.
Upon reset, TCRF is initialized to H'00.
Bit 7—Toggle Output Level H (TOLH): Bit 7 sets the output level at pin TMOFH. The setting
goes into effect immediately after this bit is written.
Bit 7: TOLH
Description
0
Low level
1
High level
(initial value)
Bits 6 to 4—Clock Select H (CKSH2 to CKSH0): Bits 6 to 4 select the input to TCFH from four
internal clock signals or the overflow of TCFL.
Bit 6: CKSH2
Bit 5: CKSH1
Bit 4: CKSH0
Description
0
*
*
16-bit mode selected. TCFL overflow signals
are counted
(initial value)
1
0
0
Internal clock: φ/32
1
Internal clock: φ/16
0
Internal clock: φ/4
1
Internal clock: φ/2
1
Legend: * Don't care
Bit 3—Toggle Output Level L (TOLL): Bit 3 sets the output level at pin TMOFL. The setting
goes into effect immediately after this bit is written.
Bit 3: TOLL
Description
0
Low level
1
High level
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(initial value)
9. Timers
Bits 2 to 0—Clock Select L (CKSL2 to CKSL0): Bits 2 to 0 select the input to TCFL from four
internal clock signals or external event input.
Bit 2: CKSL2
Bit 1: CKSL1
Bit 0: CKSL0
Description
0
*
*
External event (TMIF). Rising or falling edge is
counted*1
(initial value)
1
0
1
0
Internal clock: φ/32
1
Internal clock: φ/16
0
Internal clock: φ/4
1
Internal clock: φ/2
Legend: * Don't care
Note: 1. The edge of the external event signal is selected by bit IEG3 in the IRQ edge select
register (IEGR). See section 3.3.2, Interrupt Control Registers for details on the IRQ
edge select register. Note that switching the TMIF pin function by changing bit IRQ3 in
port mode register 1 (PMR1) from 0 to 1 or from 1 to 0 while the TMIF pin is at the low
level may cause the timer F counter to be incremented.
Timer Control/Status Register F (TCSRF)
Bit
7
6
5
4
3
2
1
0
OVFH
CMFH
OVIEH
CCLRH
OVFL
CMFL
OVIEL
CCLRL
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W*
R/W*
R/W
R/W
R/W*
R/W*
R/W
R/W
Note:
*
Only 0 can be written to clear flag.
TCSRF is an 8-bit read/write register. It is used for counter clear selection, overflow and compare
match indication, and enabling of interrupts caused by timer overflow.
Upon reset, TCSRF is initialized to H'00.
Bit 7—Timer overflow flag H (OVFH): Bit 7 is a status flag indicating TCFH overflow (H'FF to
H'00). This flag is set by hardware and cleared by software. It cannot be set by software.
Bit 7: OVFH
Description
0
Clearing condition:
After reading OVFH = 1, cleared by writing 0 to OVFH
1
(initial value)
Setting condition:
Set when the value of TCFH goes from H'FF to H'00
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9. Timers
Bit 6—Compare Match Flag H (CMFH): Bit 6 is a status flag indicating a compare match
between TCFH and OCRFH. This flag is set by hardware and cleared by software. It cannot be set
by software.
Bit 6: CMFH
Description
0
Clearing condition:
After reading CMFH = 1, cleared by writing 0 to CMFH
1
(initial value)
Setting condition:
Set when the TCFH value matches OCRFH value
Bit 5—Timer Overflow Interrupt Enable H (OVIEH): Bit 5 enables or disables TCFH
overflow interrupts.
Bit 5: OVIEH
Description
0
TCFH overflow interrupt disabled
1
TCFH overflow interrupt enabled
(initial value)
Bit 4—Counter Clear H (CCLRH): In 16-bit mode, bit 4 selects whether or not TCF is cleared
when a compare match occurs between TCF and OCRF.
In 8-bit mode, bit 4 selects whether or not TCFH is cleared when a compare match occurs between
TCFH and OCRFH.
Bit 4: CCLRH
Description
0
16-bit mode: TCF clearing by compare match disabled
(initial value)
8-bit mode: TCFH clearing by compare match disabled
1
16-bit mode: TCF clearing by compare match enabled
8-bit mode: TCFH clearing by compare match enabled
Bit 3—Timer Overflow Flag L (OVFL): Bit 3 is a status flag indicating TCFL overflow (H'FF
to H'00). This flag is set by hardware and cleared by software. It cannot be set by software.
Bit 3: OVFL
Description
0
Clearing condition:
After reading OVFL = 1, cleared by writing 0 to OVFL
1
Setting condition:
Set when the value of TCFL goes from H'FF to H'00
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(initial value)
9. Timers
Bit 2—Compare Match Flag L (CMFL): Bit 2 is a status flag indicating a compare match
between TCFL and OCRFL. This flag is set by hardware and cleared by software. It cannot be set
by software.
Bit 2: CMFL
Description
0
Clearing condition:
After reading CMFL = 1, cleared by writing 0 to CMFL
1
(initial value)
Setting condition:
Set when the TCFL value matches the OCRFL value
Bit 1—Timer Overflow Interrupt Enable L (OVIEL): Bit 1 enables or disables TCFL overflow
interrupts.
Bit 1: OVIEL
Description
0
TCFL overflow interrupt disabled
1
TCFL overflow interrupt enabled
(initial value)
Bit 0—Counter Clear L (CCLRL): Bit 0 selects whether or not TCFL is cleared when a
compare match occurs between TCFL and OCRFL.
Bit 0: CCLRL
Description
0
TCFL clearing by compare match disabled
1
TCFL clearing by compare match enabled
9.5.3
(initial value)
Interface with the CPU
TCF and OCRF are 16-bit read/write registers, whereas the data bus between the CPU and on-chip
peripheral modules has an 8-bit width. For this reason, when the CPU accesses TCF or OCRF, it
makes use of an 8-bit temporary register (TEMP).
In 16-bit mode, when reading or writing TCF or writing OCRF, always use two consecutive byte
size MOV instructions, and always access the upper byte first. Data will not be transferred
properly if only the upper byte or only the lower byte is accessed. In 8-bit mode there is no such
restriction on the order of access.
Write Access: When the upper byte is written, the upper-byte data is loaded into the TEMP
register. Next when the lower byte is written, the data in TEMP goes to the upper byte of the
register, and the lower-byte data goes directly to the lower byte of the register. Figure 9.5 shows a
TCF write operation when H'AA55 is written to TCF.
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9. Timers
CPU
(H'AA)
Bus interface
Upper byte write
Internal data bus
TEMP
(H'AA)
TCFH
(
)
TCFL
(
)
CPU
(H'55)
Bus interface
Lower byte write
Internal data bus
TEMP
(H'AA)
TCFH
(H'AA)
TCFL
(H'55)
Figure 9.5 TCF Write Operation (CPU → TCF)
Read Access: When the upper byte of TCF is read, the upper-byte data is sent directly to the CPU,
and the lower byte is loaded into TEMP. Next when the lower byte is read, the lower byte in
TEMP is sent to the CPU.
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9. Timers
When the upper byte of OCRF is read, the upper-byte data is sent directly to the CPU. Next when
the lower byte is read, the lower-byte data is sent directly to the CPU.
Figure 9.6 shows a TCF read operation when H'AAFF is read from TCF.
CPU
(H'AA)
Bus interface
Upper byte read
Internal data bus
TEMP
(H'FF)
TCFH
(H'AA)
TCFL
(H'FF)
CPU
(H'FF)
Bus interface
Lower byte read
Internal data bus
TEMP
(H'FF)
TCFH
(AB)*
TCFL
(00)*
Note: * Becomes H'AB00 if counter is incremented once.
Figure 9.6 TCF Read Operation (TCF → CPU)
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9. Timers
9.5.4
Timer Operation
Timer F is a 16-bit timer/counter that increments with each input clock. The value set in output
compare register F is constantly compared with the value of timer counter F, and when they match
the counter can be cleared, an interrupt can be requested, and the port output can be toggled. Timer
F can also be used as two independent 8-bit timers.
Timer F Operation: Timer F can operate in either 16-bit timer mode or 8-bit timer mode. These
modes are described below.
• 16-bit timer mode
Timer F operates in 16-bit timer mode when the CKSH2 bit in timer control register F (TCRF)
is cleared to 0.
A reset initializes timer counter F (TCF) to H'0000, output compare register F (OCRF) to
H'FFFF, and timer control register F (TCRF) and timer control status register F (TCSRF) to
H'00. Timer F begins counting external event input signals (TMIF). The edge of the external
event signal is selected by the IEG3 bit in the IRQ edge select register (IEGR).
Any of four internal clocks output by prescaler S, or an external clock, can be selected as the
timer F operating clock by bits CKSL2 to CKSL0 in TCRF.
TCF is continuously compared with the contents of OCRF. When these two values match, the
CMFH bit in TCSRF is set to 1. At this time if IENTFH of IENR2 is 1, a CPU interrupt is
requested and the output at pin TMOFH is toggled. If the CCLRH bit in TCSRF is 1, timer F is
cleared. The output at pin TMOFH can also be set by the TOLH bit in TCRF.
If timer F overflows (from H'FFFF to H'0000), the OVFH bit in TCSRF is set. At this time, if
the OVIEH bit in TCSRF and the IENTFH bit in IENR2 are both 1, a CPU interrupt is
requested.
• 8-bit timer mode
When the CKSH2 bit in TCRF is set to 1, timer F operates as two independent 8-bit timers,
TCFH and TCFL. The input clock of TCFH/TCFL is selected by bits CKSH2 to
CKSH0/CKSL2 to CKSL0 in TCRF.
When TCFH/TCFL and the contents of OCRFH/OCRFL match, the CMFH/CMFL bit in
TCSRF is set to 1. If the IENTFH/IENTFL bit in IENR2 is 1, a CPU interrupt is requested and
the output at pin TMOFH/TMOFL is toggled. If the CCLRH/CCLRL bit in TCRF is 1,
TCFH/TCFL is cleared. The output at pin TMOFH/TMOFL can also be set by the
TOLH/TOLL bit in TCRF.
When TCFH/TCFL overflows from H'FF to H'00, the OVFH/OVFL bit in TCSRF is set to 1.
At this time, if the OVIEH/OVIEL bit in TCSRF and the IENTFH/IENTFL bit in IENR2 are
both 1, a CPU interrupt is requested.
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9. Timers
TCF Count Timing: TCF is incremented by each pulse of the input clock (internal or external
clock).
• Internal clock
The settings of bits CKSH2 to CKSH0 or bits CKSL2 to CKSL0 in TCRF select one of four
internal clock signals divided from the system clock (φ), namely, φ/32, φ/16, φ/4, or φ/2.
• External clock
External clock input is selected by clearing bit CKSL2 to 0 in TCRF. Either rising or falling
edges of the clock input can be counted. The edge of an external event is selected by bit IEG3
in the interrupt controller's IEGR register. An external event pulse width of at least two system
clock (φ) cycles is necessary for correct operation of the counter.
TMOFH and TMOFL Output Timing: The outputs at pins TMOFH and TMOFL are the values
set in bits TOLH and TOLL in TCRF. When a compare match occurs, the output value is inverted.
Figure 9.7 shows the output timing.
φ
TMIF
(when IEG3 = 1)
Count input
clock
TCF
OCRF
N
N+1
N
N
N+1
N
Compare match
signal
TMOFH, TMOFL
Figure 9.7 TMOFH, TMOFL Output Timing
TCF Clear Timing: TCF can be cleared at compare match with OCRF.
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9. Timers
Timer Overflow Flag (OVF) Set Timing: OVF is set to 1 when TCF overflows (goes from
H'FFFF to H'0000).
Compare Match Flag Set Timing: The compare match flags (CMFH or CMFL) are set to 1
when a compare match occurs between TCF and OCRF. A compare match signal is generated in
the final state in which the values match (when TCF changes from the matching count value to the
next value). When TCF and OCRF match, a compare match signal is not generated until the next
counter clock pulse.
Timer F Operation States: Table 9.13 summarizes the timer F operation states.
Table 9.13 Timer F Operation States
Operation Mode
Reset
Active
Sleep
Watch
Subactive
Subsleep
Standby
TCF
Reset
Functions
Functions
Halted
Halted
Halted
Halted
OCRF
Reset
Functions
Retained
Retained
Retained
Retained
Retained
TCRF
Reset
Functions
Retained
Retained
Retained
Retained
Retained
TCSRF
Reset
Functions
Retained
Retained
Retained
Retained
Retained
9.5.5
Application Notes
The following conflicts can arise in timer F operation.
• 16-bit timer mode
The output at pin TMOFH toggles when all 16 bits match and a compare match signal is
generated. If the compare match signal occurs at the same time as new data is written in TCRF
by a MOV instruction, however, the new value written in bit TOLH will be output at pin
TMOFH. The TMOFL output in 16-bit mode is indeterminate, so this output should not be
used. Use the pin as a general input or output port.
If an OCRFL write occurs at the same time as a compare match signal, the compare match
signal is inhibited. If a compare match occurs between the written data and the counter value,
however, a compare match signal will be generated at that point. The compare match signal is
output in synchronization with the TCFL clock, so if this clock is stopped no compare match
signal will be generated, even if a compare match occurs.
Compare match flag CMFH is set when all 16 bits match and a compare match signal is
generated; bit CMFL is set when the setting conditions are met for the lower 8 bits.
The overflow flag (OVFH) is set when TCF overflows; bit OVFL is set if the setting
conditions are met when the lower 8 bits overflow. If a write to TCFL occurs at the same time
as an overflow signal, the overflow signal is not output.
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9. Timers
• 8-bit timer mode
⎯ TCFH and OCRFH
The output at pin TMOFH toggles when there is a compare match. If the compare match
signal occurs at the same time as new data is written in TCRF by a MOV instruction,
however, the new value written in bit TOLH will be output at pin TMOFH.
If an OCRFH write occurs at the same time as a compare match signal, the compare match
signal is inhibited. If a compare match occurs between the written data and the counter
value, however, a compare match signal will be generated at that point. The compare match
signal is output in synchronization with the TCFH clock.
If a TCFH write occurs at the same time as an overflow signal, the overflow signal is not
output.
⎯ TCFL and OCRFL
The output at pin TMOFL toggles when there is a compare match. If the compare match
signal occurs at the same time as new data is written in TCRF by a MOV instruction,
however, the new value written in bit TOLL will be output at pin TMOFL.
If an OCRFL write occurs at the same time as a compare match signal, the compare match
signal is inhibited. If a compare match occurs between the written data and the counter
value, however, a compare match signal will be generated at that point. The compare match
signal is output in synchronization with the TCFL clock, so if this clock is stopped no
compare match signal will be generated, even if a compare match occurs.
If a TCFL write occurs at the same time as an overflow signal, the overflow signal is not
output.
9.6
Watchdog Timer [H8/3857F and H8/3854F Only]
9.6.1
Overview
The watchdog timer (WDT) is equipped with an 8-bit counter that is incremented by an input
clock. An internal chip reset can be executed if the counter overflows because it is not updated
normally due to a system crash, etc.
This watchdog timer is used by the flash memory programming control program.
Features
Features of the watchdog timer are given below.
• Choice of eight internal clock sources (φ/64, φ/128, φ/256, φ/512, φ/1024, φ/2048, φ/4096,
φ/8192)
• Reset signal generated on counter overflow
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9. Timers
An overflow period of 1 to 256 times the selected clock can be set.
Block Diagram
Figure 9.8 shows a block diagram of the watchdog timer.
φ
PSS
Internal data bus
TCSRW
TCW
TMW
Internal reset signal
Legend:
TCSRW
TCW
PSS
TMW
: Timer control/status register W
: Timer counter W
: Prescaler S
: Timer mode register W
Figure 9.8 Block Diagram of Watchdog Timer
Register Configuration
Table 9.14 shows the watchdog timer register configuration. These registers are valid only in the
F-ZTAT version. In the mask ROM version, read accesses to the corresponding addresses will
always return 1, and writes are invalid.
Table 9.14 Watchdog Timer Registers
Name
Abbr.
R/W
Initial Value
Address
Timer control/status register W
TCSRW
R/W
H'AA
H'FF90
Timer counter W
TCW
R/W
H'00
H'FF91
Timer mode register W
TMW
R/W
H'FF
H'FF92
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9. Timers
9.6.2
Register Descriptions
Timer Control/Status Register W (TCSRW)
Bit
7
6
5
4
3
2
1
0
B6WI
TCWE
B4WI
TCSRWE
B2WI
WDON
BOWI
WRST
Initial value
1
0
1
0
1
0
1
0
Read/Write
R
R/(W)*
R
R/(W)*
R
R/(W)*
R
R/(W)*
Note: * Can be written to only when the write condition is satisfied. For the write conditions, see the
individual bit descriptions.
TCSRW is an 8-bit read/write register that performs TCSRW and TCW write control and
watchdog timer operation control, and indicates the operation status.
Bit 7—Bit 6 Write Inhibit (B6WI): Bit 7 controls writing of data to bit 6 of TCSRW.
Bit 7: B6WI
Description
0
Writing to bit 6 is enabled
1
Writing to bit 6 is disabled
(initial value)
This bit is always read as 1. Data is not stored if written to this bit.
Bit 6—Timer Counter W Write Enable (TCWE): Bit 6 controls writing of 8-bit data to TCW.
Bit 6: TCWE Description
0
Writing of 8-bit data to TCW is disabled
1
Writing of 8-bit data to TCW is enabled
(initial value)
Bit 5—Bit 4 Write Inhibit (B4WI): Bit 5 controls writing of data to bit 4 of TCSRW.
Bit 5: B4WI
Description
0
Writing to bit 4 is enabled
1
Writing to bit 4 is disabled
(initial value)
This bit is always read as 1. Data is not stored if written to this bit.
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9. Timers
Bit 4—Timer Control/Status Register W Write Enable (TCSRWE): Bit 4 controls writing of
data to bits 2 and 0 of TCSRW.
Bit 4: TCSRWE Description
0
Writing to bits 2 and 0 is disabled
1
Writing to bits 2 and 0 is enabled
(initial valu
Bit 3—Bit 2 Write Inhibit (B2WI): Bit 3 controls writing of data to bit 2 of TCSRW.
Bit 3: B2WI
Description
0
Writing to bit 2 is enabled
1
Writing to bit 2 is disabled
(initial value)
This bit is always read as 1. Data is not stored if written to this bit.
Bit 2—Watchdog Timer On (WDON): Bit 2 controls watchdog timer operation.
Bit 2: WDON Description
0
Watchdog timer operation is disabled
(initial value)
[Clearing condition]
In a reset, or when 0 is written to WDON while writing 0 to B2WI when TCSRWE = 1
1
Watchdog timer operation is enabled
[Setting condition]
When 1 is written to WDON while writing 0 to B2WI when TCSRWE = 1
The count-up starts when this bit is set to 1, and stops when it is cleared to 0.
Bit 1—Bit 0 Write Inhibit (B0WI): Bit 1 controls writing of data to bit 0 of timer control/status
register W.
Bit 1: B0WI
Description
0
Writing to bit 0 is enabled
1
Writing to bit 0 is disabled
This bit is always read as 1. Data is not stored if written to this bit.
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(initial value)
9. Timers
Bit 0—Watchdog Timer Reset (WRST): Bit 0 indicates that TCW has overflowed and an
internal reset signal has been generated. The internal reset signal generated by the overflow resets
the entire chip.
WRST is cleared by a reset via the RES pin or by a 0 write by software.
Bit 0: WRST Description
0
1
[Clearing conditions]
(initial value)
•
Reset by RES pin
•
When 0 is written to WRST while writing 0 to B0WI when TCSRWE = 1
[Setting condition]
When TCW overflows and an internal reset signal is generated
Timer Counter W (TCW)
Bit
7
6
5
4
3
2
1
0
TCW7
TCW6
TCW5
TCW4
TCW3
TCW2
TCW1
TCW0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
TCW is an 8-bit read/write up-counter that is incremented by an input internal clock. The TCW
value can be read or written by the CPU at any time.
When TCW overflows (from H'FF to H'00), an internal reset signal is generated and WRST in
TCSRW is set to 1. Upon reset, TCW is initialized to H'00.
Timer Mode Register W (TMW)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
CKS2
CKS1
CKS0
Initial value
1
1
1
1
1
1
1
1
Read/Write
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
TMW is an 8-bit read/write register that selects the input clock.
Upon reset, TMW is initialized to H'FF.
Bits 7 to 3—Reserved Bits: Bits 7 to 3 are reserved; they are always read as 1 and cannot be
modified.
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9. Timers
Bits 2 to 0—Clock Select 2 to 0 (CKS2 to CKS0): Bits 2 to 0 select the clock to be input to
TCW.
Bit 2:
CKS2
Bit 1:
CKS1
Bit 0:
CKS0
Description
0
0
0
Internal clock: φ/64
1
Internal clock: φ/128
1
1
0
1
9.6.3
0
Internal clock: φ/256
1
Internal clock: φ/512
0
Internal clock: φ/1024
1
Internal clock: φ/2048
0
Internal clock: φ/4096
1
Internal clock: φ/8192
(initial value)
Operation
The watchdog timer is provided with an 8-bit counter that increments with each input clock pulse.
If 1 is written to WDON while writing 0 to B2WI when TCSRWE in TCSRW is set to 1, TCW
begins counting up. When a clock pulse is input after the TCW count value has reached H'FF, the
watchdog timer overflows and an internal reset signal is generated one base clock (φ) cycle later.
The internal reset signal is output for a period of 512 φosc clock cycles. TCW is a writable counter,
and when a value is set in TCW, the count-up starts from that value. An overflow period in the
range of 1 to 256 input clock cycles can therefore be set, according to the TCW value.
Figure 9.9 shows an example of watchdog timer operation.
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9. Timers
Example: With 30 ms overflow period when φ = 4 MHz (φ/8192 selected)
4 × 106
8192
× 30 × 10–3 = 14.6
Therefore, 256 – 15 = 241 (H'F1) is set in TCW.
TCW overflow
H'FF
H'F1
TCW
count value
H'00
Start
H'F1 written
to TCW
H'F1 written to TCW
Reset generated
Internal reset signal
512 φosc clock cycles
Figure 9.9 Example of Watchdog Timer Operation
9.6.4
Watchdog Timer Operating Modes
Watchdog timer operating modes are shown in table 9.15.
Table 9.15 Watchdog Timer Operating Modes
Operating
mode
Reset
Active
Sleep
Watch
Subactive Subsleep
Standby
TCW
Reset
Functions
Functions
Halted
Halted
Halted
Halted
TCSRW
Reset
Functions
Functions
Retained
Retained
Retained
Retained
TMW
Reset
Functions
Retained
Retained
Retained
Retained
Retained
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9. Timers
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10. Serial Communication Interface
Section 10 Serial Communication Interface
10.1
Overview
The H8/3857 Group is provided with a two-channel serial communication interface (SCI), and the
H8/3854 Group with a single-channel SCI. Table 10.1 summarizes the functions and features of
the SCI channels.
Table 10.1 Serial Communication Interface Functions
Channel
Functions
Features
SCI1*
Synchronous serial transfer
•
Choice of 8-bit or 16-bit data
length
Choice of 8 internal clocks (φ/1024 to φ/2)
or external clock
•
Open drain output possible
Continuous clock output
•
Interrupt requested at completion of
transfer
Synchronous serial transfer
•
Built-in baud rate generator
•
•
Receive error detection
•
Break detection
•
Interrupt requested at completion of
transfer or error
•
•
SCI3
8-bit data transfer
•
Send, receive, or simultaneous
send/receive
Asynchronous serial transfer
Note:
*
•
Multiprocessor communication
function
•
Choice of 7-bit or 8-bit data length
•
Choice of 1-bit or 2-bit stop bit
length
•
Parity addition
SCI1 is a function of the H8/3857 Group only, and is not provided in the H8/3854
Group.
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10. Serial Communication Interface
10.2
SCI1 (H8/3857 Group Only)
10.2.1
Overview
Serial communication interface 1 (SCI1) performs synchronous serial transfer of 8-bit or 16-bit
data.
SCI1 is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
Features
Features of SCI1 are as follows.
• Choice of 8-bit or 16-bit transfer data length
• Choice of eight internal clock sources (φ/1024, φ/256, φ/64, φ/32, φ/16, φ/8, φ/4, φ/2) or an
external clock
• Interrupt requested at completion of transfer
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10. Serial Communication Interface
Block Diagram
Figure 10.1 shows a block diagram of SCI1.
φ
PSS
SCR1
Transmit/receive
control circuit
SCSR1
Internal data bus
SCK1
Transfer bit counter
SDRU
SI1
SDRL
SO1
IRRS1
Legend:
SCR1:
SCSR1:
SDRU:
SDRL:
IRRS1:
PSS:
Serial control register 1
Serial control/status register 1
Serial data register U
Serial data register L
SCI1 interrupt request flag
Prescaler S
Figure 10.1 SCI1 Block Diagram
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10. Serial Communication Interface
Pin Configuration
Table 10.2 shows the SCI1 pin configuration.
Table 10.2 Pin Configuration
Name
Abbr.
I/O
Function
SCI1 clock pin
SCK1
I/O
SCI1 clock input or output
SCI1 data input pin
SI1
Input
SCI1 receive data input
SCI1 data output pin
SO1
Output
SCI1 transmit data output
Register Configuration
Table 10.3 shows the SCI1 register configuration.
Table 10.3 SCI1 Registers
Name
Abbr.
R/W
Initial Value
Address
Serial control register 1
SCR1
R/W
H'00
H'FFA0
Serial control status register 1
SCSR1
R/W
H'80
H'FFA1
Serial data register U
SDRU
R/W
Undefined
H'FFA2
Serial data register L
SDRL
R/W
Undefined
H'FFA3
10.2.2
Register Descriptions
Serial Control Register 1 (SCR1)
Bit
7
6
5
4
3
2
1
0
SNC1
SNC0
⎯
⎯
CKS3
CKS2
CKS1
CKS0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SCR1 is an 8-bit read/write register for selecting the operation mode, the transfer clock source,
and the prescaler division ratio.
Upon reset, SCR1 is initialized to H'00. Writing to this register during a transfer stops the transfer.
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10. Serial Communication Interface
Bits 7 and 6—Operation Mode Select 1, 0 (SNC1, SNC0): Bits 7 and 6 select the operation
mode.
Bit 7: SNC1
Bit 6: SNC0
Description
0
0
8-bit synchronous transfer mode
1
16-bit synchronous transfer mode
0
Continuous clock output mode*1
1
Reserved*2
1
(initial value)
Notes: 1. Pins SI1 and SO1 should be used as general input or output ports.
2. Don't set bits SNC1 and SNC0 to 11.
Bits 5 and 4—Reserved Bits: Bits 5 and 4 are reserved; they should always be cleared to 0.
Bit 3—Clock Source Select 3 (CKS3): Bit 3 selects the clock source and sets pin SCK1 as an
input or output pin.
Bit 3: CKS3
Description
0
Clock source is prescaler S, and pin SCK1 is output pin
1
Clock source is external clock, and pin SCK1 is input pin
(initial value)
Bits 2 to 0—Clock Select 2 to 0 (CKS2 to CKS 0): When CKS3 = 0, bits 2 to 0 select the
prescaler division ratio and the serial clock cycle.
Serial Clock Cycle
Bit 2: CKS2
Bit 1: CKS1
Bit 0: CKS0
Prescaler Division
φ = 5 MHz
φ = 2.5 MHz
0
0
0
φ/1024 (initial value)
204.8 μs
409.6 μs
1
φ/256
51.2 μs
102.4 μs
0
φ/64
12.8 μs
25.6 μs
1
φ/32
6.4 μs
12.8 μs
0
φ/16
3.2 μs
6.4 μs
1
φ/8
1.6 μs
3.2 μs
0
φ/4
0.8 μs
1.6 μs
1
φ/2
⎯
0.8 μs
1
1
0
1
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10. Serial Communication Interface
Serial Control/Status Register 1 (SCSR1)
Bit
7
6
5
4
3
2
1
0
⎯
SOL
ORER
⎯
⎯
⎯
⎯
STF
Initial value
1
0
0
0
0
0
0
0
Read/Write
⎯
R/W
R/(W)*
⎯
⎯
⎯
R/W
R/W
Note:
*
Only a write of 0 for flag clearing is possible.
SCSR1 is an 8-bit read/write register indicating operation status and error status.
Upon reset, SCSR1 is initialized to H'80.
Do not read or write to SCSR1 during a transfer operation, as this will cause erroneous operation.
Bit 7—Reserved Bit: Bit 7 is reserved; it is always read as 1, and cannot be modified.
Bit 6—Extended Data Bit (SOL): Bit 6 sets the SO1 output level. When read, SOL returns the
output level at the SO1 pin. After completion of a transmission, SO1 continues to output the value
of the last bit of transmitted data. The SO1 output can be changed by writing to SOL before or after
a transmission. The SOL bit setting remains valid only until the start of the next transmission. To
control the level of the SO1 pin after transmission ends, it is necessary to write to the SOL bit at
the end of each transmission. Do not write to this register while transmission is in progress,
because that may cause a malfunction.
Bit 6: SOL
Description
0
Read: SO1 pin output level is low
Write: SO1 pin output level changes to low
1
Read: SO1 pin output level is high
Write: SO1 pin output level changes to high
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(initial value)
10. Serial Communication Interface
Bit 5—Overrun Error Flag (ORER): When an external clock is used, bit 5 indicates the
occurrence of an overrun error. If a clock pulse is input after transfer completion, this bit is set to 1
indicating an overrun. If noise occurs during a transfer, causing an extraneous pulse to be
superimposed on the normal serial clock, incorrect data may be transferred.
Bit 5: ORER
Description
0
Clearing condition:
After reading ORER = 1, cleared by writing 0 to ORER
1
(initial value)
Setting condition:
Set if a clock pulse is input after transfer is complete, when an external clock is
used
Bits 4 to 2—Reserved Bits: Bits 4 to 2 are reserved; they are always read as 0, and cannot be
modified.
Bit 1—Reserved Bit: Bit 1 is reserved; it should always be cleared to 0.
Bit 0—Start Flag (STF): Bit 0 controls the start of a transfer. Setting this bit to 1 causes SCI1 to
start transferring data.
This bit remains set to 1 during transfer or while waiting for a start bit, and is cleared to 0 upon
completion of the transfer.
Bit 0: STF
Description
0
Read: Indicates that transfer is stopped
(initial value)
Write: Invalid
1
Read: Indicates transfer in progress
Write: Starts a transfer operation
Serial Data Register U (SDRU)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
SDRU7
SDRU6
SDRU5
SDRU4
SDRU3
SDRU2
SDRU1
SDRU0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SDRU is an 8-bit read/write register. It is used as the data register for the upper 8 bits in 16-bit
transfer (SDRL is used for the lower 8 bits).
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10. Serial Communication Interface
Data written to SDRU is output to SDRL starting from the least significant bit (LSB). This data is
then replaced by LSB-first data input at pin SI1, which is shifted in the direction from the most
significant bit (MSB) toward the LSB.
SDRU must be written or read only after data transmission or reception is complete. If this register
is written or read while a data transfer is in progress, the data contents are not guaranteed.
The SDRU value upon reset is not fixed.
Serial Data Register L (SDRL)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
SDRL7
SDRL6
SDRL5
SDRL4
SDRL3
SDRL2
SDRL1
SDRL0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
SDRL is an 8-bit read/write register. It is used as the data register in 8-bit transfer, and as the data
register for the lower 8 bits in 16-bit transfer (SDRU is used for the upper 8 bits).
In 8-bit transfer, data written to SDRL is output from pin SO1 starting from the least significant bit
(LSB). This data is than replaced by LSB-first data input at pin SI1, which is shifted in the
direction from the most significant bit (MSB) toward the LSB.
In 16-bit transfer, operation is the same as for 8-bit transfer, except that input data is fed in via
SDRU.
SDRL must be written or read only after data transmission or reception is complete. If this register
is read or written while a data transfer is in progress, the data contents are not guaranteed.
The SDRL value upon reset is not fixed.
10.2.3
Operation
Data can be sent and received in an 8-bit or 16-bit format, synchronized to an internal or external
serial clock. Overrun errors can be detected when an external clock is used.
Clock
The serial clock can be selected from a choice of eight internal clocks and an external clock. When
an internal clock source is selected, pin SCK1 becomes the clock output pin. When continuous
clock output mode is selected (SCR1 bits SNC1 and SNC0 are set to 10), the clock signal (φ/1024
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10. Serial Communication Interface
to φ/2) selected in bits CKS2 to CKS0 is output continuously from pin SCK1. When an external
clock is used, pin SCK1 is the clock input pin.
Data Transfer Format
Figure 10.2 shows the data transfer format. Data is sent and received starting from the least
significant bit, in LSB-first format. Transmit data is output from one falling edge of the serial
clock until the next falling edge. Receive data is latched at the rising edge of the serial clock.
SCK 1
SO1 /SI 1
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Figure 10.2 Transfer Format
Data Transfer Operations
Transmitting: A transmit operation is carried out as follows.
• Set bits SO1 and SCK1 in PMR3 TO 1 so that the respective pins function as SO1 and SCK1. If
necessary, set bit POF1 in port mode register 2 (PMR2) for NMOS open drain output at pin
SO1.
• Clear bit SNC1 in SCR1 to 0, and set bit SNC0 to 1 or 0, designating 8- or 16-bit synchronous
transfer mode. Select the serial clock in bits CKS3 to CKS0. Writing data to SCR1 initializes
the internal state of SCI1.
• Write transmit data in SDRL and SDRU, as follows.
⎯ 8-bit transfer mode: SDRL
⎯ 16-bit transfer mode: Upper byte in SDRU, lower byte in SDRL
• Set the SCSR1 start flag (STF) to 1. SCI1 starts operating and outputs transmit data at pin SO1.
• After data transmission is complete, bit IRRS1 in interrupt request register 1 (IRR1) is set to 1.
When an internal clock is used, a serial clock is output from pin SCK1 in synchronization with the
transmit data. After data transmission is complete, the serial clock is not output until the next time
the start flag is set to 1. During this time, pin SO1 continues to output the value of the last bit
transmitted.
When an external clock is used, data is transmitted in synchronization with the serial clock input at
pin SCK1. After data transmission is complete, an overrun occurs if the serial clock continues to be
input; no data is transmitted and the SCSR1 overrun error flag (bit ORER) is set to 1.
While transmission is stopped, the output value of pin SO1 can be changed by rewriting bit SOL in
SCSR1.
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10. Serial Communication Interface
Receiving: A receive operation is carried out as follows.
• Set bits SI1 and SCK1 in PMR3 to 1 so that the respective pins function as SI1 and SCK1.
• Clear bit SNC1 in SCR1 to 0, and set bit SNC0 to 1 or 0, designating 8- or 16-bit synchronous
transfer mode. Select the serial clock in bits CKS3 to CKS0. Writing data to SCR1 initializes
the internal state of SCI1.
• Set the SCSR1 start flag (STF) to 1. SCI1 starts operating and receives data at pin SI1.
• After data reception is complete, bit IRRS1 in interrupt request register 1 (IRR1) is set to 1.
• Read the received data from SDRL and SDRU, as follows.
⎯ 8-bit transfer mode: SDRL
⎯ 16-bit transfer mode: Upper byte in SDRU, lower byte in SDRL
• After data reception is complete, an overrun occurs if the serial clock continues to be input; no
data is received and the SCSR1 overrun error flag (bit ORER) is set to 1.
Simultaneous transmit/receive: A simultaneous transmit/receive operation is carried out as
follows.
• Set bits SO1, SI1, and SCK1 in PMR3 to 1 so that the respective pins function as SO1, SI1, and
SCK1. If necessary, set bit POF1 in port mode register 2 (PMR2) for NMOS open drain output
at pin SO1.
• Clear bit SNC1 in SCR1 to 0, and set bit SNC0 to 1 or 0, designating 8- or 16-bit synchronous
transfer mode. Select the serial clock in bits CKS3 to CKS0. Writing data to SCR1 initializes
the internal state of SCI1.
• Write transmit data in SDRL and SDRU, as follows.
⎯ 8-bit transfer mode: SDRL
⎯ 16-bit transfer mode: Upper byte in SDRU, lower byte in SDRL
• Set the SCSR1 start flag (STF) to 1. SCI1 starts operating. Transmit data is output at pin SO1.
Receive data is input at pin SI1.
• After data transmission and reception are complete, bit IRRS1 in IRR1 is set to 1.
• Read the received data from SDRL and SDRU, as follows.
⎯ 8-bit transfer mode: SDRL
⎯ 16-bit transfer mode: Upper byte in SDRU, lower byte in SDRL
When an internal clock is used, a serial clock is output from pin SCK1 in synchronization with the
transmit data. After data transmission is complete, the serial clock is not output until the next time
the start flag is set to 1. During this time, pin SO1 continues to output the value of the last bit
transmitted.
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10. Serial Communication Interface
When an external clock is used, data is transmitted and received in synchronization with the serial
clock input at pin SCK1. After data transmission and reception are complete, an overrun occurs if
the serial clock continues to be input; no data is transmitted or received and the SCSR1 overrun
error flag (bit ORER) is set to 1.
While transmission is stopped, the output value of pin SO1 can be changed by rewriting bit SOL in
SCSR1.
10.2.4
Interrupts
SCI1 can generate an interrupt at the end of a data transfer.
When an SCI1 transfer is complete, bit IRRS1 in interrupt request register 1 (IRR1) is set to 1.
SCI1 interrupt requests can be enabled or disabled by bit IENS1 of interrupt enable register 1
(IENR1).
For further details, see section 3.3, Interrupts.
10.2.5
Application Notes
Note the following points when using SCI1.
When an External Clock is Input to the SCK1 Pin: When SCK1 is designated as an input
pin and an external clock is selected as the clock source, do not input the external clock before
writing 1 to the STF bit in SCSR1 to start the transfer operation.
Confirming the End of Serial Transfer: Do not read or write to SCSR1 during serial
transfer. The following two methods can be used to confirm the end of serial transfer:
• Using SCI1 interrupt exception handling
Set the IENS1 bit to 1 in IENR1 and execute interrupt exception handling.
• Using IRR1 polling
With SCI1 interrupts disabled (IENS1 = 0 in IENR1), confirm that the IRRS1 bit in IRR1 has
been set to 1.
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10. Serial Communication Interface
10.3
SCI3
10.3.1
Overview
Serial communication interface 3 (SCI3) has both synchronous and asynchronous serial data
communication capabilities. It also has a multiprocessor communication function for serial data
communication among two or more processors.
Features
SCI3 features are listed below.
• Selection of asynchronous or synchronous mode
⎯ Asynchronous mode
Serial data communication is performed using an asynchronous method in which
synchronization is established character by character.
SCI3 can communicate with a UART (universal asynchronous receiver/transmitter), ACIA
(asynchronous communication interface adapter), or other chip that employs standard
asynchronous serial communication. It can also communicate with two or more other
processors using the multiprocessor communication function. There are twelve selectable
serial data communication formats.
• Data length: seven or eight bits
• Stop bit length: one or two bits
• Parity: even, odd, or none
• Multiprocessor bit: one or none
• Receive error detection: parity, overrun, and framing errors
• Break detection: by reading the RXD level directly when a framing error occurs
⎯ Synchronous mode
Serial data communication is synchronized with a clock signal. SCI3 can communicate
with other chips having a clocked synchronous communication function.
• Data length: eight bits
• Receive error detection: overrun errors
• Full duplex communication
The transmitting and receiving sections are independent, so SCI3 can transmit and receive
simultaneously. Both sections use double buffering, so continuous data transfer is possible in
both the transmit and receive directions.
• Built-in baud rate generator with selectable bit rates.
• Internal or external clock may be selected as the transfer clock source.
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10. Serial Communication Interface
• There are six interrupt sources: transmit end, transmit data empty, receive data full, overrun
error, framing error, and parity error.
Block Diagram
Figure 10.3 shows a block diagram of SCI3.
SCK 3
External
clock
Baud rate
generator
BRC
Internal clock
(φ/64, φ/16, φ/4, φ)
BRR
Clock
Transmit/receive
control
SCR3
SSR
TXD
TSR
TDR
RXD
RSR
RDR
Internal data bus
SMR
Interrupt
requests
(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
SCR3: Serial control register 3
SSR: Serial status register
BRR: Bit rate register
BRC: Bit rate counter
Figure 10.3 SCI3 Block Diagram
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10. Serial Communication Interface
Pin Configuration
Table 10.4 shows the SCI3 pin configuration.
Table 10.4 Pin Configuration
Name
Abbr.
I/O
Function
SCI3 clock
SCK3
I/O
SCI3 clock input/output
SCI3 receive data input
RXD
Input
SCI3 receive data input
SCI3 transmit data output
TXD
Output
SCI3 transmit data output
Register Configuration
Table 10.5 shows the SCI3 internal register configuration.
Table 10.5 SCI3 Registers
Name
Abbr.
R/W
Initial Value
Address
Serial mode register
SMR
R/W
H'00
H'FFA8
Bit rate register
BRR
R/W
H'FF
H'FFA9
Serial control register 3
SCR3
R/W
H'00
H'FFAA
Transmit data register
TDR
R/W
H'FF
H'FFAB
Serial status register
SSR
R/W
H'84
H'FFAC
Receive data register
RDR
R
H'00
H'FFAD
Transmit shift register
TSR
*
⎯
⎯
Receive shift register
RSR
*
⎯
⎯
Bit rate counter
BRC
*
⎯
⎯
Legend:
⎯: Cannot be read or written.
10.3.2
Register Descriptions
Receive Shift Register (RSR)
Bit
7
6
5
4
3
2
1
0
Read/Write
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
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10. Serial Communication Interface
The receive shift register (RSR) is for receiving serial data.
Serial data is input in LSB (bit 0) order into RSR from pin RXD, converting it to parallel data.
After each byte of data has been received, the byte is automatically transferred to the receive data
register (RDR).
RSR cannot be read or written directly by the CPU.
Receive Data Register (RDR)
Bit
7
6
5
4
3
2
1
0
RDR7
RDR6
RDR5
RDR4
RDR3
RDR2
RDR1
RDR0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
The receive data register (RDR) is an 8-bit register for storing received serial data.
Each time a byte of data is received, the received data is transferred from the receive shift register
(RSR) to RDR, completing a receive operation. Thereafter RSR again becomes ready to receive
new data. RSR and RDR form a double buffer mechanism that allows data to be received
continuously.
RDR is exclusively for receiving data and cannot be written by the CPU.
RDR is initialized to H'00 upon reset or in standby mode, watch mode, subactive mode, or
subsleep mode.
Transmit Shift Register (TSR)
Bit
7
6
5
4
3
2
1
0
Read/Write
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
The transmit shift register (TSR) is for transmitting serial data.
Transmit data is first transferred from the transmit data register (TDR) to TSR, then is transmitted
from pin TXD, starting from the LSB (bit 0).
After one byte of data has been sent, the next byte is automatically transferred from TDR to TSR,
and the next transmission begins. If no data has been written to TDR (1 is set in TDRE), there is
no data transfer from TDR to TSR.
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10. Serial Communication Interface
TSR cannot be read or written directly by the CPU.
Transmit Data Register (TDR)
Bit
7
6
5
4
3
2
1
0
TDR7
TDR6
TDR5
TDR4
TDR3
TDR2
TDR1
TDR0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The transmit data register (TDR) is an 8-bit register for holding transmit data.
When SCI3 detects that the transmit shift register (TSR) is empty, it shifts transmit data written in
TDR to TSR and starts serial data transmission. While TSR is transmitting serial data, the next
byte to be transmitted can be written to TDR, realizing continuous transmission.
TDR can be read or written by the CPU at all times.
TDR is initialized to H'FF upon reset or in standby mode, watch mode, subactive mode, or
subsleep mode.
Serial Mode Register (SMR)
Bit
7
6
5
4
3
2
1
0
COM
CHR
PE
PM
STOP
MP
CKS1
CKS0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The serial mode register (SMR) is an 8-bit register for setting the serial data communication
format and for selecting the clock source of the baud rate generator. SMR can be read and written
by the CPU at any time.
SMR is initialized to H'00 upon reset or in standby mode, watch mode, subactive mode, or
subsleep mode.
Bit 7—Communication Mode (COM): Bit 7 selects asynchronous mode or synchronous mode
as the serial data communication mode.
Bit 7: COM
Description
0
Asynchronous mode
1
Synchronous mode
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(initial value)
10. Serial Communication Interface
Bit 6—Character Length (CHR): Bit 6 selects either 7 bits or 8 bits as the data length in
asynchronous mode. In synchronous mode the data length is always 8 bits regardless of the setting
here.
Bit 6: CHR
Description
0
8-bit data
1
7-bit data*
Note:
*
(initial value)
When 7-bit data is selected as the character length in asynchronous mode, the MSB
(bit 7) in the transmit data register is not transmitted.
Bit 5—Parity Enable (PE): In asynchronous mode, bit 5 selects whether or not a parity bit is to
be added to transmitted data and checked in received data. In synchronous mode there is no adding
or checking of parity regardless of the setting here.
Bit 5: PE
Description
0
Parity bit adding and checking disabled
1
Parity bit adding and checking enabled*
Note:
*
(initial value)
When PE is set to 1, then either odd or even parity is added to transmit data, depending
on the setting of the parity mode bit (PM). When data is received, it is checked for odd
or even parity as designated in bit PM.
Bit 4—Parity Mode (PM): In asynchronous mode, bit 4 selects whether odd or even parity is to
be added to transmitted data and checked in received data. The PM setting is valid only if bit PE is
set to 1, enabling parity adding/checking. In synchronous mode, or if parity adding/checking is
disabled in asynchronous mode, the PM setting is invalid.
Bit 4: PM
Description
0
Even parity*1
1
Odd parity*2
(initial value)
Notes: 1. When even parity is designated, a parity bit is added to the transmitted data so that the
sum of 1s in the resulting data is an even number. When data is received, the sum of 1s
in the data plus parity bit is checked to see if the result is an even number.
2. When odd parity is designated, a parity bit is added to the transmitted data so that the
sum of 1s in the resulting data is an odd number. When data is received, the sum of 1s
in the data plus parity bit is checked to see if the result is an odd number.
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10. Serial Communication Interface
Bit 3—Stop Bit Length (STOP): Bit 3 selects 1 bit or 2 bits as the stop bit length in
asynchronous mode. This setting is valid only in asynchronous mode. In synchronous mode a stop
bit is not added, so this bit is ignored.
Bit 3: STOP
Description
0
1 stop bit*1
1
(initial value)
2
2 stop bits*
Notes: 1. When data is transmitted, one 1 bit is added at the end of each transmitted character as
the stop bit.
2. When data is transmitted, two 1 bits are added at the end of each transmitted character
as the stop bits.
When data is received, only the first stop bit is checked regardless of the stop bit length. If the
second stop bit value is 1 it is treated as a stop bit; if it is 0, it is treated as the start bit of the next
character.
Bit 2—Multiprocessor Mode (MP): Bit 2 enables or disables the multiprocessor communication
function. When the multiprocessor communication function is enabled, the parity enable (PE) and
parity mode (PM) settings are ignored. The MP bit is valid only in asynchronous mode; it should
be cleared to 0 in synchronous mode.
See section 10.3.6, Multiprocessor Communication Function for details on the multiprocessor
communication function.
Bit 2: MP
Description
0
Multiprocessor communication function disabled
1
Multiprocessor communication function enabled
(initial value)
Bits 1 and 0—Clock Select 1, 0 (CKS1, CKS0): Bits 1 and 0 select the clock source for the builtin baud rate generator. A choice of φ/64, φ/16, φ/4, or φ is made in these bits.
See Bit Rate Register (BRR) in section 10.3.2, Register Descriptions, below for information on the
clock source and bit rate register settings, and their relation to the baud rate.
Bit 1: CKS1
Bit 0: CKS0
Description
0
0
φ clock
1
φ/4 clock
0
φ/16 clock
1
φ/64 clock
1
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(initial value)
10. Serial Communication Interface
Serial Control Register 3 (SCR3)
Bit
7
6
5
4
3
2
1
0
TIE
RIE
TE
RE
MPIE
TEIE
CKE1
CKE0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Serial control register 3 (SCR3) is an 8-bit register that controls SCI3 transmit and receive
operations, enables or disables serial clock output in asynchronous mode, enables or disables
interrupts, and selects the serial clock source. SCR3 can be read and written by the CPU at any
time.
SCR3 is initialized to H'00 upon reset or in standby mode, watch mode, subactive mode, or
subsleep mode.
Bit 7—Transmit Interrupt Enable (TIE): Bit 7 enables or disables the transmit data empty
interrupt (TXI) request when data is transferred from TDR to TSR and the transmit data register
empty bit (TDRE) in the serial status register (SSR) is set to 1. The TXI interrupt can be cleared
by clearing bit TDRE to 0, or by clearing bit TIE to 0.
Bit 7: TIE
Description
0
Transmit data empty interrupt request (TXI) disabled
1
Transmit data empty interrupt request (TXI) enabled
(initial value)
Bit 6—Receive Interrupt Enable (RIE): Bit 6 enables or disables the receive error interrupt
(ERI), and the receive data full interrupt (RXI) requested when data is transferred from RSR to
RDR and the receive data register full bit (RDRF) in the serial status register (SSR) is set to 1.
There are three kinds of receive error: overrun, framing, and parity. RXI and ERI interrupts can be
cleared by clearing SSR flag RDRF, or flags FER, PER, and OER to 0, or by clearing bit RIE to 0.
Bit 6: RIE
Description
0
Receive data full interrupt request (RXI) and receive error interrupt request
(ERI) disabled
(initial value)
1
Receive data full interrupt request (RXI) and receive error interrupt request
(ERI) enabled
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10. Serial Communication Interface
Bit 5—Transmit Enable (TE): Bit 5 enables or disables the start of a transmit operation.
Bit 5: TE
Description
0
Transmit operation disabled*1 (TXD is a general I/O port)
(initial value)
2
1
Transmit operation enabled* (TXD is the transmit data pin)
Notes: 1. The transmit data register empty bit (TDRE) in the serial status register (SSR) is fixed
at 1.
2. In this state, writing transmit data in TDR clears bit TDRE in SSR to 0 and starts serial
data transmission.
Before setting TE to 1 it is necessary to set the transmit format in SMR. When
performing simultaneous transmission and reception in synchronous mode, TE and RE
should be set to 1 simultaneously by a single instruction when they are both cleared to
0.
Bit 4—Receive Enable (RE): Bit 4 enables or disables the start of a receive operation.
Bit 4: RE
Description
0
Receive operation disabled*1 (RXD is a general I/O port)
1
2
(initial value)
Receive operation enabled* (RXD is the receive data pin)
Notes: 1. When RE is cleared to 0, this has no effect on the SSR flags RDRF, FER, PER, and
OER, which retain their states.
2. Serial data receiving begins when, in this state, a start bit is detected in asynchronous
mode, or serial clock input is detected in synchronous mode.
Before setting RE to 1 it is necessary to set the receive format in SMR. When
performing simultaneous transmission and reception in synchronous mode, TE and RE
should be set to 1 simultaneously by a single instruction when they are both cleared to
0.
Bit 3—Multiprocessor Interrupt Enable (MPIE): Bit 3 enables or disables multiprocessor
interrupt requests. This setting is valid only in asynchronous mode, and only when the
multiprocessor mode bit (MP) in the serial mode register (SMR) is set to 1. This bit is ignored
when COM is set to 1 or when bit MP is cleared to 0.
Bit 3: MPIE
Description
0
Multiprocessor interrupt request disabled (ordinary receive operation)
(initial value)
Clearing condition:
Multiprocessor bit receives a data value of 1
1
Note:
Multiprocessor interrupt request enabled*
*
SCI3 does not transfer receive data from RSR to RDR, does not detect receive errors,
and does not set status flags RDRF, FER, and OER in SSR. Until a multiprocessor bit
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10. Serial Communication Interface
value of 1 is received, the receive data full interrupt (RXI) and receive error interrupt
(ERI) are disabled and serial status register (SSR) flags RDRF, FER, and OER are not
set. When the multiprocessor bit receives a 1, the MPBR bit of SSR is set to 1, MPIE is
automatically cleared to 0, RXI and ERI interrupts are enabled (provided bits TIE and
RIE in SCR3 are set to 1), and setting of the RDRF, FER, and OER flags is enabled.
Bit 2—Transmit End Interrupt Enable (TEIE): Bit 2 enables or disables the transmit end
interrupt (TEI) requested if there is no valid transmit data in TDR when the MSB is transmitted.
Bit 2: TEIE
Description
0
Transmit end interrupt (TEI) disabled
1
Note:
(initial value)
Transmit end interrupt (TEI) enabled*
*
A TEI interrupt can be cleared by clearing the SSR bit TDRE to 0 and clearing the
transmit end bit (TEND) to 0, or by clearing bit TEIE to 0.
Bits 1 and 0—Clock Enable 1, 0 (CKE1, CKE0): Bits 1 and 0 select the clock source and enable
or disable clock output at pin SCK3. The combination of bits CKE1 and CKE0 determines whether
pin SCK3 is a general I/O port, a clock output pin, or a clock input pin.
Note that the CKE0 setting is valid only when operation is in asynchronous mode using an internal
clock (CKE1 = 0). This bit is invalid in synchronous mode or when using an external clock
(CKE1 = 1). In synchronous mode and in external clock mode, clear CKE0 to 0. After setting bits
CKE1 and CKE0, the operation mode must first be set in the serial mode register (SMR).
See table 10.12 in section 10.3.3, Operation, for details on clock source selection.
Bit 1: CKE1
Bit 0: CKE0
Communication Mode
Clock Source
SCK3 Pin Function
0
0
Asynchronous
Internal clock
I/O port*1
Synchronous
Internal clock
Serial clock output*1
Asynchronous
Internal clock
Clock output*2
Synchronous
Reserved
Reserved
Asynchronous
External clock
Clock input*3
Synchronous
External clock
Serial clock input
Asynchronous
Reserved
Reserved
Synchronous
Reserved
Reserved
0
1
1
1
0
1
Notes: 1. Initial value
2. A clock is output with the same frequency as the bit rate.
3. Input a clock with a frequency 16 times the bit rate.
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10. Serial Communication Interface
Serial Status Register (SSR)
Bit
7
6
5
4
3
2
1
0
TDRE
RDRF
OER
FER
PER
TEND
MPBR
MPBT
Initial value
1
0
0
0
0
1
0
0
Read/Write
R/(W)*
R/(W)*
R/(W)*
R/(W)*
R/(W)*
R
R
R/W
Note:
*
Only 0 can be written for flag clearing.
The serial status register (SSR) is an 8-bit register containing status flags for indicating SCI3
states, and containing the multiprocessor bits.
SSR can be read and written by the CPU at any time, but the CPU cannot write a 1 to the status
flags TDRE, RDRF, OER, PER, and FER. To clear these flags to 0 it is first necessary to read a 1.
Bit 2 (TEND) and bit 1 (MPBR) are read-only bits and cannot be modified.
SSR is initialized to H'84 upon reset or in standby mode, watch mode, subactive mode, or
subsleep mode.
Bit 7—Transmit Data Register Empty (TDRE): Bit 7 is a status flag indicating that data has
been transferred from TDR to TSR.
Bit 7: TDRE
Description
0
Indicates that transmit data written to TDR has not been transferred to TSR
Clearing conditions:
After reading TDRE = 1, cleared by writing 0 to TDRE.
When data is written to TDR by an instruction.
1
Indicates that no transmit data has been written to TDR, or the transmit data
written to TDR has been transferred to TSR
(initial value)
Setting conditions:
When bit TE in SCR3 is cleared to 0.
When data is transferred from TDR to TSR.
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10. Serial Communication Interface
Bit 6—Receive Data Register Full (RDRF): Bit 6 is a status flag indicating whether there is
receive data in RDR.
Bit 6: RDRF
Description
0
Indicates there is no receive data in RDR
(initial value)
Clearing conditions:
After reading RDRF = 1, cleared by writing 0 to RDRF.
When data is read from RDR by an instruction.
1
Indicates that there is receive data in RDR
Setting condition:
When receiving ends normally, with receive data transferred from RSR to RDR
Note: If a receive error is detected at the end of receiving, or if bit RE in serial control register 3
(SCR3) is cleared to 0, RDR and RDRF are unaffected and keep their previous states. An
overrun error (OER) occurs if receiving of data is completed while bit RDRF remains set
to 1. If this happens, receive data will be lost.
Bit 5—Overrun Error (OER): Bit 5 is a status flag indicating that an overrun error has occurred
during data receiving.
Bit 5: OER
Description
0
Indicates that data receiving is in progress or has been completed*1 (initial value)
Clearing condition:
After reading OER = 1, cleared by writing 0 to OER
1
Indicates that an overrun error occurred in data receiving*2
Setting condition:
When data receiving is completed while RDRF is set to 1
Notes: 1. When bit RE in serial control register 3 (SCR3) is cleared to 0, OER is unaffected and
keeps its previous state.
2. RDR keeps the data received prior to the overrun; data received after that is lost. While
OER is set to 1, data receiving cannot be continued. In synchronous mode, data
transmitting cannot be continued either.
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10. Serial Communication Interface
Bit 4—Framing Error (FER): Bit 4 is a status flag indicating that a framing error has occurred
during asynchronous receiving.
Bit 4: FER
Description
0
Indicates that data receiving is in progress or has been completed*1 (initial value)
Clearing condition:
After reading FER = 1, cleared by writing 0 to FER
1
Indicates that a framing error occurred in data receiving
Setting condition:
The stop bit at the end of receive data is checked for a value of 1 and found to be
0*2
Notes: 1. When bit RE in serial control register 3 (SCR3) is cleared to 0, FER is unaffected and
keeps its previous state.
2. When two stop bits are used only the first stop bit is checked, not the second. When a
framing error occurs, receive data is transferred to RDR but RDRF is not set. While
FER is set to 1, data receiving cannot be continued. In synchronous mode, data
transmitting cannot be continued either.
Bit 3—Parity Error (PER): Bit 3 is a status flag indicating that a parity error has occurred during
asynchronous receiving.
Bit 3: PER
Description
0
Indicates that data receiving is in progress or has been completed*1 (initial value)
Clearing condition:
After reading PER = 1, cleared by writing 0 to PER
1
Indicates that a parity error occurred in data receiving*2
Setting condition:
When the sum of 1s in received data plus the parity bit does not match the parity
mode bit (PM) setting in the serial mode register (SMR)
Notes: 1. When bit RE in serial control register 3 (SCR3) is cleared to 0, PER is unaffected and
keeps its previous state.
2. When a parity error occurs, receive data is transferred to RDR but RDRF is not set.
While PER is set to 1, data receiving cannot be continued. In synchronous mode, data
transmitting cannot be continued either.
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10. Serial Communication Interface
Bit 2—Transmit End (TEND): Bit 2 is a status flag indicating that TDRE was set to 1 when the
last bit of a transmitted character was sent. TEND is a read-only bit and cannot be modified
directly.
Bit 2: TEND
Description
0
Indicates that transmission is in progress
Clearing conditions:
After reading TDRE = 1, cleared by writing 0 to TDRE.
When data is written to TDR by an instruction.
1
Indicates that a transmission has ended
(initial value)
Setting conditions:
When bit TE in SCR3 is cleared to 0.
If TDRE is set to 1 when the last bit of a transmitted character is sent.
Bit 1—Multiprocessor Bit Receive (MPBR): Bit 1 holds the multiprocessor bit in data received
in asynchronous mode using a multiprocessor format. MPBR is a read-only bit and cannot be
modified.
Bit 1: MPBR
Description
0
Indicates reception of data in which the multiprocessor bit is 0*
1
Indicates reception of data in which the multiprocessor bit is 1
Note:
*
(initial value)
If bit RE is cleared to 0 while a multiprocessor format is in use, MPBR retains its
previous state.
Bit 0—Multiprocessor Bit Transmit (MPBT): Bit 0 holds the multiprocessor bit to be added to
transmitted data when a multiprocessor format is used in asynchronous mode. Bit MPBT is
ignored when synchronous mode is chosen, when the multiprocessor communication function is
disabled, or when data transmission is disabled.
Bit 0: MPBT
Description
0
The multiprocessor bit in transmit data is 0
1
The multiprocessor bit in transmit data is 1
(initial value)
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10. Serial Communication Interface
Bit Rate Register (BRR)
Bit
7
6
5
4
3
2
1
0
BRR7
BRR6
BRR5
BRR4
BRR3
BRR2
BRR1
BRR0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The bit rate register (BRR) is an 8-bit register which, together with the baud rate generator clock
selected by bits CKS1 and CKS0 in the serial mode register (SMR), sets the transmit/receive bit
rate.
BRR can be read or written by the CPU at any time.
BRR is initialized to H'FF upon reset or in standby mode, watch mode, subactive mode, or
subsleep mode.
Table 10.6 gives examples of how BRR is set in asynchronous mode. The values in
table 10.6 are for active (high-speed) mode.
Table 10.6 BRR Settings and Bit Rates in Asynchronous Mode
OSC (MHz)
2
2.4576
4
4.194304
Bit Rate
(bits/s)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
1
70
+0.03
1
86
+0.31
1
141
+0.03
1
148
−0.04
150
0
207
+0.16
0
255
0
1
103
+0.16
1
108
+0.21
300
0
103
+0.16
0
127
0
0
207
+0.16
0
217
+0.21
600
0
51
+0.16
0
63
0
0
103
+0.16
0
108
+0.21
1200
0
25
+0.16
0
31
0
0
51
+0.16
0
54
−0.70
2400
0
12
+0.16
0
15
0
0
25
+0.16
0
26
+1.14
4800
⎯
⎯
⎯
0
7
0
0
12
+0.16
0
13
−2.48
9600
⎯
⎯
⎯
0
3
0
⎯
⎯
⎯
0
6
−2.48
19200
⎯
⎯
⎯
0
1
0
⎯
⎯
⎯
⎯
⎯
⎯
31250
0
0
0
⎯
⎯
⎯
0
1
0
⎯
⎯
⎯
38400
⎯
⎯
⎯
0
0
0
⎯
⎯
⎯
⎯
⎯
⎯
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10. Serial Communication Interface
OSC (MHz)
4.9152
6
7.3728
8
Bit Rate
(bits/s)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
n
N
Error
(%)
110
1
174
−0.26
1
212
+0.03
2
64
+0.70
2
70
+0.03
150
1
127
0
1
155
+0.16
1
191
0
1
207
+0.16
300
0
255
0
1
77
+0.16
1
95
0
1
103
+0.16
600
0
127
0
0
155
+0.16
0
191
0
0
207
+0.16
1200
0
63
0
0
77
+0.16
0
95
0
0
103
+0.16
2400
0
31
0
0
38
+0.16
0
47
0
0
51
+0.16
4800
0
15
0
0
19
−2.34
0
23
0
0
25
+0.16
9600
0
7
0
0
9
−2.34
0
11
0
0
12
+0.16
19200
0
3
0
0
4
−2.34
0
5
0
⎯
⎯
⎯
31250
⎯
⎯
⎯
0
2
0
⎯
⎯
⎯
0
3
0
38400
0
1
0
⎯
⎯
⎯
0
2
0
⎯
⎯
⎯
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10. Serial Communication Interface
OSC (MHz)
9.8304
10
Bit Rate
(bits/s)
n
N
Error
(%)
n
N
Error
(%)
110
2
86
+0.31
2
88
−0.25
150
1
255
0
2
64
+0.16
300
1
127
0
1
129
+0.16
600
0
255
0
1
64
+0.16
1200
0
127
0
0
129
+0.16
2400
0
63
0
0
64
+0.16
4800
0
31
0
0
32
−1.36
9600
0
15
0
0
15
+1.73
19200
0
7
0
0
7
+1.73
31250
0
4
−1.70
0
4
0
38400
0
3
0
0
3
+1.73
Notes: 1. Settings should be made so that error is within 1%.
2. BRR setting values are derived by the following equation.
N=
OSC
× 106 – 1
64 × 22n × B
B:
N:
OSC:
n:
Bit rate (bits/s)
BRR baud rate generator setting (0 ≤ N ≤ 255)
Value of φOSC (MHz)
Baud rate generator input clock number (n = 0 to 3)
(The relation between n and the clock is shown in table 10.7.)
3. The error values in table 10.6 were derived by performing the following calculation and
rounding off to two decimal places.
Error (%) =
B–R
× 100
R
B: Bit rate found from n, N, and OSC
R: Bit rate listed in left column of table 10.6
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10. Serial Communication Interface
The meaning of n is shown in table 10.7.
Table 10.7 Relation between n and Clock
SMR Setting
n
Clock
CKS1
CKS0
0
φ
0
0
1
φ/4
0
1
2
φ/16
1
0
3
φ/64
1
1
Table 10.8 shows the maximum bit rate for selected frequencies in asynchronous mode. Values in
table 10.8 are for active (high-speed) mode.
Table 10.8 Maximum Bit Rate at Selected Frequencies (Asynchronous Mode)
Setting
OSC (MHz)
Maximum Bit Rate (bits/s)
n
N
2
31250
0
0
2.4576
38400
0
0
4
62500
0
0
4.194304
65536
0
0
4.9152
76800
0
0
6
93750
0
0
7.3728
115200
0
0
8
125000
0
0
9.8304
153600
0
0
10
156250
0
0
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10. Serial Communication Interface
Table 10.9 shows typical BRR settings in synchronous mode. Values in table 10.9 are for active
(high-speed) mode.
Table 10.9 Typical BRR Settings and Bit Rates (Synchronous Mode)
OSC (MHz)
2
4
8
10
Bit Rate
(bits/s)
n
N
n
N
n
N
n
N
110
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
250
1
249
2
124
2
249
⎯
⎯
500
1
124
1
249
2
124
⎯
⎯
1K
0
249
1
124
1
249
⎯
⎯
2.5 K
0
99
0
199
1
99
1
124
5K
0
49
0
99
0
199
0
249
10 K
0
24
0
49
0
99
0
124
25 K
0
9
0
19
0
39
0
49
50 K
0
4
0
9
0
19
0
24
100 K
⎯
⎯
0
4
0
9
⎯
⎯
250 K
0
0*
0
1
0
3
0
4
0
0*
0
1
⎯
⎯
0
0*
⎯
⎯
500 K
1M
2.5 M
Legend:
Blank: Cannot be set
⎯:
Can be set, but error will result
*:
Continuous transfer not possible at this setting
BRR setting values are derived by the following equation.
N=
OSC
× 106 – 1
8 × 22n × B
Legend:
B:
Bit rate (bits/s)
N:
BRR baud rate generator setting (0 ≤ N ≤ 255)
OSC: Value of φOSC (MHz)
n:
Baud rate generator input clock number (n = 0, 1, 2, 3)
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10. Serial Communication Interface
The meaning of n is shown in table 10.10.
Table 10.10 Relation between n and Clock
SMR Setting
n
Clock
CKS1
CKS0
0
φ
0
0
1
φ/4
0
1
2
φ/16
1
0
3
φ/64
1
1
10.3.3
Operation
SCI3 supports serial data communication in both asynchronous mode, where each character
transferred is synchronized separately, and synchronous mode, where transfer is synchronized by
clock pulses.
The choice of asynchronous mode or synchronous mode, and the communication format, is made
in the serial mode register (SMR), as shown in table 10.11. The SCI3 clock source is determined
by bit COM in SMR and bits CKE1 and CKE0 in serial control register 3 (SCR3), as shown in
table 10.12.
Asynchronous Mode:
• Data length: choice of 7 bits or 8 bits
• Options include addition of parity bit, multiprocessor bit, and one or two stop bits
(transmit/receive format and character length are determined by this combination of options).
• Framing error (FER), parity error (PER), overrun error (OER), and line breaks can be detected
when data is received.
• Clock source: Choice of internal clocks or an external clock
When an internal clock is selected: Operates on baud rate generator clock. A clock can be
output with the same frequency as the bit rate.
When an external clock is selected: A clock input with a frequency 16 times the bit rate is
required (internal baud rate generator is not used).
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10. Serial Communication Interface
Synchronous Mode:
• Transfer format: 8 bits
• Overrun error can be detected when data is received.
• Clock source: Choice of internal clocks or an external clock
When an internal clock is selected: Operates on baud rate generator clock, and outputs a serial
clock.
When an external clock is selected: The internal baud rate generator is not used. Operation is
synchronous with the input clock.
Table 10.11 SMR Settings and SCI3 Communication Format
SMR Setting
Communication Format
Bit 7: Bit 6: Bit 2: Bit 5: Bit 3:
COM CHR MP
PE
STOP Mode
MultiproData Length cessor Bit
Parity
Bit
Stop Bit
Length
0
8-bit data
No
1 bit
0
0
0
0
1
1
Asynchronous
mode
No
2 bits
0
Yes
1
1
0
2 bits
0
7-bit data
No
1
1
1
0
1
1
*
0
*
0
*
1
*
0
*
1
*
*
1 bit
2 bits
Yes
1
0
1 bit
1 bit
2 bits
Asynchronous
mode
8-bit data
Yes
Legend: * Don't care
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1 bit
2 bits
(multiprocessor 7-bit data
format)
Synchronous
mode
No
8-bit data
1 bit
2 bits
No
None
10. Serial Communication Interface
Table 10.12 SMR and SCR3 Settings and Clock Source Selection
SMR
SCR3
Bit 7:
COM
Bit 1:
CKE1
Bit 0:
CKE0
0
0
0
1
1
0
0
0
1
0
Transmit/Receive Clock
Mode
Asynchronous
mode
Clock
Source
Pin SCK3 Function
Internal
I/O port (SCK3 function not used)
Outputs clock with same frequency as
bit rate
External
Clock should be input with frequency
16 times the desired bit rate
Internal
Outputs a serial clock
0
Synchronous
mode
External
Inputs a serial clock
1
1
Reserved
(illegal settings)
1
0
1
1
1
1
1
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10. Serial Communication Interface
Continuous Transmit/Receive Operation Using Interrupts: Continuous transmit and receive
operations are possible with SCI3, using the RXI or TXI interrupts. Table 10.13 explains this use
of these interrupts.
Table 10.13 Transmit/Receive Interrupts
Interrupt
RXI
Flag
Interrupt Conditions
Remarks
RDRF
When serial data is received normally
and receive data is transferred from
RSR to RDR, RDRF is set to 1. If RIE
is 1 at this time, RXI is enabled and an
interrupt occurs. (See figure
10.4.)
The RXI interrupt handler routine
should read the receive data from
RDR and clear RDRF to 0.
Continuous receiving is possible if
these operations are completed
before the next data has been
completely received in RSR.
When TSR empty (previous transmission complete) is detected and the
transmit data set in TDR is transferred
to TSR, TDRE is set to 1. If TIE is 1 at
this time, TXI is enabled and an
interrupt occurs. (See figure 10.5.)
The TXI interrupt handler routine
should write the next transmit data
to TDR and clear TDRE to
0.Continuous transmission is
possible if these operations are
completed before the data
transferred to TSR has been
completely transmitted.
When the last bit of the TSR transmit
character has been sent, if TDRE is 1,
then 1 is set in TEND. If TEIE is 1 at
this time, TEI is enabled and an
interrupt occurs. (See figure 10.6.)
TEI indicates that, when the last bit
of the TSR transmit character was
sent, the next transmit data had
not been written to TDR.
RIE
TXI
TDRE
TIE
TEI
TEND
TEIE
RDR
RDR
RSR (receiving)
RXD
pin
RXD
pin
RDRF = 0
RSR ↑ (received and transferred)
RDRF ← 1
(RXI requested if RIE = 1)
Figure 10.4 RDRF Setting and RXI Interrupt
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10. Serial Communication Interface
TDR (next transmit data)
TDR
TSR (transmitting)
TSR ↓ (transmission complete,
next data transferred)
TXD
pin
TXD
pin
TDRE ← 1
(TXI requested if TIE = 1)
TDRE = 0
Figure 10.5 TDRE Setting and TXI Interrupt
TDR
TDR
TSR (transmitting)
TXD
pin
TSR (transmission end)
TXD
pin
TEND = 0
TEND ← 1
(TEI requested if TEIE = 1)
Figure 10.6 TEND Setting and TEI Interrupt
10.3.4
Operation in Asynchronous Mode
In asynchronous communication mode, a start bit indicating the start of communication and a stop
bit indicating the end of communication are added to each character that is sent. In this way
synchronization is achieved for each character as a self-contained unit.
SCI3 consists of independent transmit and receive modules, giving it the capability of full duplex
communication. Both the transmit and receive modules have a double-buffer configuration,
allowing data to be read or written during communication operations so that data can be
transmitted and received continuously.
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10. Serial Communication Interface
Transmit/Receive Formats
Figure 10.7 shows the general format for asynchronous serial communication.
(MSB)
(LSB)
Serial
data
Start
bit
Transmit or receive data
1 bit
7 or 8 bits
1
Parity
bit
1 bit
or
none
Stop bit
Mark
state
1 or 2
bits
One unit of data (character or frame)
Figure 10.7 Data Format in Asynchronous Serial Communication Mode
The communication line in asynchronous communication mode normally stays at the high level, in
the “mark” state. SCI3 monitors the communication line, and begins serial data communication
when it detects a “space” (low-level signal), which is regarded as a start bit.
One character consists of a start bit (low level), transmit/receive data (in LSB-first order: starting
with the least significant bit), a parity bit (high or low level), and finally a stop bit (high level), in
this order.
In asynchronous data receiving, synchronization is with the falling edge of the start bit. SCI3
samples data on the 8th pulse of a clock that has 16 times the frequency of the bit rate, so each bit
of data is latched at its center.
Table 10.14 shows the 12 transmit/receive formats formats that can be selected in asynchronous
mode. The format is selected in the serial mode register (SMR).
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10. Serial Communication Interface
Table 10.14 Serial Communication Formats in Asynchronous Mode
SMR Settings
Serial Transfer Format and Frame Length
CHR
PE
MP
STOP
1
2
3
4
5
6
7
8
9
10
11
12
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: * Don't care
S:
Start bit
STOP: Stop bit
P:
Parity bit
MPB: Multiprocessor bit
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10. Serial Communication Interface
Clock
The clock source is determined by bit COM in SMR and bits CKE1 and CKE0 in serial control
register 3 (SCR3). See table 10.12 for the settings. Either an internal clock source can be used to
run the built-in baud rate generator, or an external clock source can be input at pin SCK3.
When an external clock is input at pin SCK3, it should have a frequency 16 times the desired bit
rate.
When an internal clock source is used, SCK3 is used as the clock output pin. The clock output has
the same frequency as the serial bit rate, and is synchronized as in figure 10.8 so that the rising
edge of the clock occurs in the center of each bit of transmit/receive data.
Clock
Serial
data
0
D0
D1
D2
D3
D4
D5
D6
D7
0/1
1
1
1 character (1 frame)
Figure 10.8 Phase Relation of Output Clock and Communication Data in Asynchronous
Mode (8-Bit Data, Parity Bit Added, and 2 Stop Bits)
Data Transmit/Receive Operations
SCI3 Initialization: Before data is sent or received, bits TE and RE in serial control register 3
(SCR3) must be cleared to 0, after which initialization can be performed using the procedure
shown in figure 10.9.
Note: When modifying the operation mode, transfer format or other settings, always be sure to
clear bits TE and RE first. When TE is cleared to 0, bit TDRE will be set to 1. Clearing
RE does not clear the status flags RDRF, PER, FER, or OER, or alter the contents of the
receive data register (RDR).
When an external clock is used in asynchronous mode, do not stop the clock during
operation, including during initialization. When an external clock is used in synchronous
mode, do not supply the clock during initialization.
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10. Serial Communication Interface
Figure 10.9 shows a typical flow chart for SCI3 initialization.
Start
Clear TE and RE to 0 in SCR3
1
Set bits CKE1 and CKE0
2
Select communication format in SMR
3
Set BRR value
1. Select the clock in serial control register 3
(SCR3). Other bits must be cleared to 0.
If clock output is selected in asynchronous
mode, a clock signal will be output as soon
as CKE1 and CKE0 have been set.
If clock output is selected for reception in
synchronous mode, a clock signal will be
output as soon as bits CKE1 and CKE0,
and bit RE, are set to 1.
2. Set the transmit/receive format in the serial
mode register (SMR).
Wait
Has a 1-bit
interval elapsed?
No
3. Set the bit rate register (BRR) to the value
giving the desired bit rate.
This step is not required when an external
clock source is used.
Yes
4
Set bits RIE, TIE, TEIE, and MPIE
in SCR3, and set TE or RE to 1
End
4. Wait for at least a 1-bit interval, then set
bits RIE, TIE, TEIE, and MPIE, and set bit
TE or RE in SCR3 to 1. Setting TE or RE
enables SCI3 to use the TXD or RXD pin.
The initial states in asynchronous mode
are the mark transmit state and the idle
receive state (waiting for a start bit).
Figure 10.9 Typical Flow Chart when SCI3 Is Initialized
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10. Serial Communication Interface
Transmitting: Figure 10.10 shows a typical flow chart for data transmission. After SCI3
initialization, follow the procedure below.
Start
1
Read bit TDRE in SSR
TDRE = 1?
No
1. Read the serial status register (SRR),
and after confirming that bit TDRE = 1,
write transmit data in the transmit data
register (TDR). When data is written to
TDR, TDRE is automatically cleared to 0.
Yes
Write transmit data in TDR
2
Continue
data transmission?
No
Yes
2. To continue transmitting data, read bit TDRE
to make sure it is set to 1, then write the
next data to TDR. When data is written to
TDR, TDRE is automatically cleared to 0.
Read bit TEND in SSR
No
TEND = 1?
Yes
3
Break output?
Yes
No
3. To output a break signal when transmission
ends, first set the port values PCR = 1 and
PDR = 0, then clear bit TE in SCR3 to 0.
Set PDR = 0 and PCR = 1
Clear bit TE in SCR3 to 0
End
Figure 10.10 Typical Data Transmission Flow Chart (Asynchronous Mode)
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10. Serial Communication Interface
SCI3 operates as follows during data transmission.
SCI3 monitors bit TDRE in SSR. When this bit is cleared to 0, SCI3 recognizes that there is data
written in the transmit data register (TDR), which it transfers to the transmit shift register (TSR).
Then TDRE is set to 1 and transmission starts. If bit TIE in SCR3 is set to 1, a TXI interrupt is
requested.
Serial data is transmitted from pin TXD using the communication format outlined in
table 10.14. Next, TDRE is checked as the stop bit is being transmitted.
If TDRE is 0, data is transferred from TDR to TSR, and after the stop bit is sent, transmission of
the next frame starts. If TDRE is 1, the TEND bit in SSR is set to 1, and after the stop bit is sent
the output remains at 1 (mark state). A TEI interrupt is requested in this state if bit TEIE in SCR3
is set to 1.
Figure 10.11 shows a typical operation in asynchronous transmission mode.
Start
bit
Serial
data
1
0
Transmit
data
D0
D1
D7
Parity Stop Start
bit
bit
bit
0/1
1
1 frame
0
Transmit
data
D0
D1
D7
Parity Stop Mark
bit
bit
state
0/1
1
1
1 frame
TDRE
TEND
LSI
TXI request TDRE cleared to 0
operation
User
processing
TXI request
TEI request
Write data in TDR
Figure 10.11 Typical Transmit Operation in Asynchronous Mode
(8-Bit Data, Parity Bit Added, and 1 Stop Bit)
Receiving: Figure 10.12 shows a typical flow chart for receiving serial data. After SCI3
initialization, follow the procedure below.
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10. Serial Communication Interface
Start
1
Yes
OER + PER +
FER = 1
No
2
1. Read bits OER, PER, and
FER in the serial status
register (SSR) to
determine if a receive
error has occurred.
If a receive error has
occurred, receive error
processing is executed.
Read bits OER, PER, and
FER in SSR
2. Read the serial status register
(SSR), and after confirming
that bit RDRF = 1, read
received data from the receive
data register (RDR).
When RDR data is read, RDRF
is automatically cleared to 0.
Read bit RDRF in SSR
No
RDRF = 1?
Yes
Read received data in RDR
3. To continue receiving data,
read bit RDRF and finish
reading RDR before the stop
bit of the present frame is
received.
When data is read from RDR,
RDRF is automatically cleared
to 0.
4 Receive error processing
Yes
3
Continue receiving?
No
A
Clear bit RE in SCR3 to 0
End
4
Start receive
error processing
Overrun error
processing
Yes
OER = 1?
No
Yes
Yes
FER = 1?
4. When a receive error occurs,
read bits OER, PER, and FER
in SSR to determine which
error (s) occurred.
After the necessary error
processing, be sure to clear
the above bits all to 0.
Data receiving cannot be resumed
while any of bits OER, PER, or
FER is set to 1.
When a framing error occurs,
a break can be detected by
reading the RXD pin value.
Break?
No
No
Framing error
processing
Yes
PER = 1?
No
Clear bits OER, PER, and
FER in SSR to 0
Parity error
processing
End receive error
processing
A
Figure 10.12 Typical Serial Data Receiving Flow Chart in Asynchronous Mode
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10. Serial Communication Interface
SCI3 operates as follows when receiving serial data in asynchronous mode.
SCI3 monitors the communication line, and when a start bit (0) is detected it performs internal
synchronization and starts receiving. The communication format for data receiving is as outlined
in table 10.14. Received data is set in RSR from LSB to MSB, then the parity bit and stop bit(s)
are received. After receiving the data, SCI3 performs the following checks:
• Parity check: The number of 1s received is checked to see if it matches the odd or even parity
selected in bit PM of SMR.
• Stop bit check: The stop bit is checked for a value of 1. If there are two stop bits, only the first
bit is checked.
• Status check: The RDRF bit is checked for a value of 0 to make sure received data can be
transferred from RSR to RDR.
If no receive error is detected by the above checks, bit RDRF is set to 1 and the received data is
stored in RDR. At that time, if bit RIE in SCR3 is set to 1, an RXI interrupt is requested. If the
error check detects a receive error, the appropriate error flag (OER, PER, or FER) is set to 1.
RDRF retains the same value as before the data was received. If at this time bit RIE in SCR3 is set
to 1, an ERI interrupt is requested.
Table 10.15 gives the receive error detection conditions and the processing of received data in
each case.
Note: Data receiving cannot be continued while a receive error flag is set. Before continuing the
receive operation it is necessary to clear the OER, FER, PER, and RDRF flags to 0.
Table 10.15 Receive Error Conditions and Received Data Processing
Receive Error
Abbr.
Detection Conditions
Received Data Processing
Overrun error
OER
Receiving of the next data ends while Received data is not
bit RDRF in SSR is still set to 1
transferred from RSR to RDR
Framing error
FER
Stop bit is 0
Received data is transferred
from RSR to RDR
Parity error
PER
Received data does not match the
parity (odd/even) set in SMR
Received data is transferred
from RSR to RDR
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10. Serial Communication Interface
Figure 10.13 shows a typical SCI3 data receive operation in asynchronous mode.
Start
bit
Serial 1
data
Receive
data
0
D0
D1
Parity Stop Start
bit
bit
bit
D7
0/1
1
0
Receive
data
D0
D1
Parity Stop
bit
bit
D7
0/1
0
Mark
(idle state)
1
1 frame
1 frame
RDRF
FER
RXI request
LSI operation
User processing
RDRF cleared
to 0
Detects stop bit = 0
ERI request due
to framing error
Read RDR data
Framing error
handling
Figure 10.13 Typical Receive Operation in Asynchronous Mode
(8-Bit Data, Parity Bit Added, and 1 Stop Bit)
10.3.5
Operation in Synchronous Mode
In synchronous mode, data is sent or received in synchronization with clock pulses. This mode is
suited to high-speed serial communication.
SCI3 consists of independent transmit and receive modules, so full duplex communication is
possible, sharing the same clock between both modules. Both the transmit and receive modules
have a double-buffer configuration. This allows data to be written during a transmit operation so
that data can be transmitted continuously, and enables data to be read during a receive operation so
that data can be received continuously.
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10. Serial Communication Interface
Transmit/Receive Format
Figure 10.14 shows the general communication data format for synchronous communication.
*
*
Serial clock
LSB
Serial data
Don't
care
Bit 0
MSB
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Don't
care
8 bits
One unit of communication data (character or frame)
Note: * At high level except during continuous transmit/receive.
Figure 10.14 Data Format in Synchronous Communication Mode
In synchronous communication, data on the communication line is output from one falling edge of
the serial clock until the next falling edge. Data is guaranteed valid at the rising edge of the serial
clock.
One character of data starts from the LSB and ends with the MSB. The communication line retains
the MSB state after the MSB is output.
In synchronous receive mode, SCI3 latches receive data in synchronization with the rising edge of
the serial clock.
The transmit/receive format is fixed at 8-bit data. No parity bit or multiprocessor bit is added in
this mode.
Clock
Either an internal clock from the built-in baud rate generator is used, or an external clock is input
at pin SCK3. The choice of clock sources is designated by bit COM in SMR and bits CKE1 and
CKE0 in serial control register 3 (SCR3). See table 10.12 for details on selecting the clock source.
When operation is based on an internal clock, a serial clock is output at pin SCK3. Eight clock
pulses are output per character of transmit/receive data. When no transmit or receive operation is
being performed, the pin is held at the high level.
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10. Serial Communication Interface
Data Transmit/Receive Operations
SCI3 Initialization: Before transmitting or receiving data, follow the SCI3 initialization
procedure explained under 10.3.4, SCI3 Initialization, and illustrated in figure 10.9.
Transmitting: Figure 10.15 shows a typical flow chart for data transmission. After SCI3
initialization, follow the procedure below.
Start
1
Read bit TDRE in SSR
No
TDRE = 1?
Yes
Write transmit data in TDR
1. Read the serial status register (SSR),
and after confirming that bit TDRE = 1,
write transmit data in the transmit
data register (TDR).
When data is written to TDR, TDRE is
automatically cleared to 0 and data
transmission begins.
If clock output has been selected, after
data is written to TDR, the clock is
output and data transmission begins.
Yes
2
Continue data transmission?
2. To continue transmitting data, read
bit TDRE to make sure it is set to 1,
then write the next data to TDR.
When data is written to TDR, TDRE
is automatically cleared to 0.
No
Read bit TEND in SSR
TEND = 1?
No
Yes
Write 0 to bit TE in SCR3
End
Figure 10.15 Typical Data Transmission Flow Chart in Synchronous Mode
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10. Serial Communication Interface
SCI3 operates as follows during data transmission in synchronous mode.
SCI3 monitors bit TDRE in SSR. When this bit is cleared to 0, SCI3 recognizes that there is data
written in the transmit data register (TDR), which it transfers to the transmit shift register (TSR).
Then TDRE is set to 1 and transmission starts. If bit TIE in SCR3 is set to 1, a TXI interrupt is
requested.
If clock output is selected, SCI3 outputs eight serial clock pulses. If an external clock is used, data
is output in synchronization with the clock input.
Serial data is transmitted from pin TXD in order from LSB (bit 0) to MSB (bit 7).
Then TDRE is checked as the MSB (bit 7) is being transmitted. If TDRE is 0, data is transferred
from TDR to TSR, and after the MSB (bit 7) is sent, transmission of the next frame starts. If
TDRE is 1, the TEND bit in SSR is set to 1, and after the MSB (bit 7) has been sent, the MSB
state is maintained. A TEI interrupt is requested in this state if bit TEIE in SCR3 is set to 1.
After data transmission ends, pin SCK3 is held at the high level.
Note: Data transmission cannot take place while any of the receive error flags (OER, FER, PER)
is set to 1. Be sure to confirm that these error flags are cleared to 0 before starting
transmission.
Figure 10.16 shows a typical SCI3 transmit operation in synchronous mode.
Serial
clock
Serial data
Bit 0
Bit 1
Bit 7
Bit 0
Bit 1
Bit 6
Bit 7
1 frame
1 frame
TDRE
TEND
LSI
operation
User
processing
TXI
request
TDRE cleared to 0
TXI
request
TEI request
Write data in TDR
Figure 10.16 Typical SCI3 Transmit Operation in Synchronous Mode
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10. Serial Communication Interface
Receiving: Figure 10.17 shows a typical flow chart for receiving data. After SCI3 initialization,
follow the procedure below.
Start
Read bit OER in SSR
1
Yes
OER = 1?
1. Read bit OER in the serial status register (SSR)
to determine if an error has occurred. If an
overrun error has occurred, overrun error
processing is executed.
No
2
Read bit RDRF in SSR
No
RDRF = 1?
2. Read the serial status register (SSR), and after
confirming that bit RDRF = 1, read received
data from the receive data register (RDR).
When data is read from RDR, RDRF is
automatically cleared to 0.
Yes
Read received data in RDR
4 Overrun error processing
Continue
receiving?
3
Yes
No
Clear bit RE in SCR3 to 0
End
4
3. To continue receiving data, read bit RDRF and
read the received data in RDR before the MSB
(bit 7) of the present frame is received.
When data is read from RDR, RDRF is
automatically cleared to 0.
4. When an overrun error occurs, read bit OER in
SSR. After the necessary error processing,
be sure to clear OER to 0.
Data receiving cannot be resumed while bit
OER is set to 1.
Start overrun
processing
Overrun error
processing
Clear bit OER in
SSR to 0
End overrun
error processing
Figure 10.17 Typical Data Receiving Flow Chart in Synchronous Mode
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10. Serial Communication Interface
SCI3 operates as follows when receiving serial data in synchronous mode.
SCI3 synchronizes internally with the input or output of the serial clock and starts receiving.
Received data is set in RSR from LSB to MSB.
After data has been received, SCI3 checks to confirm that the value of bit RDRF is 0 indicating
that received data can be transferred from RSR to RDR. If this check passes, RDRF is set to 1 and
the received data is stored in RDR. At this time, if bit RIE in SCR3 is set to 1, an RXI interrupt is
requested. If an overrun error is detected, OER is set to 1 and RDRF remains set to 1. Then if bit
RIE in SCR3 is set to 1, an ERI interrupt is requested.
For the overrun error detection conditions and receive data processing, see table 10.15.
Note: Data receiving cannot be continued while a receive error flag is set. Before continuing the
receive operation it is necessary to clear the OER, FER, PER, and RDRF flags to 0.
Figure 10.18 shows a typical receive operation in synchronous mode.
Serial
clock
Serial
data
Bit 7
Bit 0
Bit 7
Bit 0
1 frame
Bit 1
Bit 6
Bit 7
1 frame
RDRF
OER
LSI
operation
User
processing
RXI request RDRF cleared
to 0
Read data
from RDR
RXI request
ERI request due
to overrun error
RDR data
not read
(RDRF = 1)
Overrun error
handling
Figure 10.18 Typical Receive Operation in Synchronous Mode
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10. Serial Communication Interface
Simultaneous Transmit/Receive: Figure 10.19 shows a typical flow chart for transmitting and
receiving simultaneously. After SCI3 synchronization, follow the procedure below.
1. Read the serial status register (SSR),
and after confirming that bit TDRE = 1,
write transmit data in the transmit data
register (TDR). When data is written to
TDR, TDRE is automatically cleared to 0.
Start
1
Read bit TDRE in SSR
No
TDRE = 1?
Yes
2
Write transmit data in TDR
Read bit OER in SSR
Yes
OER = 1?
No
Read RDRF in SSR
No
RDRF = 1?
Yes
Read received data in RDR
4
3
Continue
transmitting and
receiving?
2. Read the serial status register (SSR),
and after confirming that bit RDRF = 1,
read the received data from the receive
data register (RDR). When data is read
from RDR, RDRF is automatically cleared
to 0.
3. To continue transmitting and receiving
serial data, read bit RDRF and finish
reading RDR before the MSB (bit 7) of the
present frame is received. Also read bit
TDRE and check that it is set to 1, indicating
that data can be written, then write the next
data in TDR, before the MSB (bit 7) of the
current frame is transmitted. When data is
written to TDR, TDRE is automatically cleared
to 0; and when data is read from RDR, RDRF
is automatically cleared to 0.
4. When an overrun error occurs, read bit
OER in SSR. After the necessary error
processing, be sure to clear OER to 0.
Data transmission and reception cannot
take place while bit OER is set to 1. See
figure 10.17 for overrun error processing.
Overrun error processing
Yes
No
Clear bits TE and
RE in SCR3 to 0
End
Figure 10.19 Simultaneous Transmit/Receive Flow Chart in Synchronous Mode
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10. Serial Communication Interface
Notes: 1. To switch from transmitting to simultaneous transmitting and receiving, use the
following procedure.
• First confirm that TDRE and TEND are both set to 1 and that SCI3 has finished
transmitting. Next clear TE to 0. Then set both TE and RE to 1.
2. To switch from receiving to simultaneous transmitting and rceiving, use the following
procedure.
• After confirming that SCI3 has finished receiving, clear RE to 0. Next, after
confirming that RDRF and the error flags (OER FER, PER) are all 0, set both TE
and RE to 1.
10.3.6
Multiprocessor Communication Function
The multiprocessor communication function enables several processors to share a single serial
communication line. The processors communicate in asynchronous mode using a format with an
additional multiprocessor bit (multiprocessor format).
In multiprocessor communication, each receiving processor is addressed by an ID code. A serial
communication cycle consists of two cycles: an ID-sending cycle that identifies the receiving
processor, and a data-sending cycle. The ID-sending cycle and data-sending cycle are
differentiated by the multiprocessor bit. The multiprocessor bit is 1 in an ID-sending cycle, and 0
in a data-sending cycle.
The transmitting processor starts by sending the ID of the receiving processor with which it wants
to communicate as data with the multiprocessor bit set to 1. Next the transmitting processor sends
transmit data with the multiprocessor bit cleared to 0. When a receiving processor receives data
with the multiprocessor bit set to 1, it compares the data with its own ID. If the data matches its
ID, the receiving processor continues to receive incoming data. If the data does not match its ID,
the receiving processor skips further incoming data until it again receives data with the
multiprocessor bit set to 1. Multiple processors can send and receive data in this way.
Figure 10.20 shows an example of communication among different processors using a
multiprocessor format.
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10. Serial Communication Interface
Transmitting
processor
Communication line
Receiving
processor A
Receiving
processor B
Receiving
processor C
Receiving
processor D
(ID = 01)
(ID = 02)
(ID = 03)
(ID = 04)
Serial data
H'01
H'AA
(MPB = 1)
ID-sending cycle
(receiving processor
address)
(MPB = 0)
Data-sending cycle
(data sent to receiving
processor designated
by ID)
MPB: Multiprocessor bit
Figure 10.20 Example of Interprocessor Communication Using Multiprocessor Format
(Data H'AA Sent to Receiving Processor A)
Four communication formats are available. Parity-bit settings are ignored when a multiprocessor
format is selected. For details see table 10.14.
For a description of the clock used in multiprocessor communication, see section 10.3.4,
Operation in Asynchronous Mode.
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10. Serial Communication Interface
Transmitting Multiprocessor Data: Figure 10.21 shows a typical flow chart for multiprocessor
serial data transmission. After SCI3 initialization, follow the procedure below.
Start
1
Read bit TDRE in SSR
No
TDRE = 1?
Yes
1. Read the serial status register (SSR), and
after confirming that bit TDRE = 1, set bit
MPBT (multiprocessor bit transmit) in SSR
to 0 or 1, then write transmit data in the
transmit data register (TDR).
When data is written to TDR, TDRE is
automatically cleared to 0.
Set bit MPBT in SSR
Write transmit data to TDR
2
Continue
transmitting?
Yes
No
Read bit TEND in SSR
No
TEND = 1?
Yes
3
Break output?
No
2. To continue transmitting data, read bit
TDRE to make sure it is set to 1, then
write the next data to TDR.
When data is written to TDR, TDRE
is automatically cleared to 0.
3. To output a break signal at the end of data
transmission, first set the port values
PCR = 1 and PDR = 0, then clear bit TE
in SCR3 to 0.
Yes
Set PDR = 0 and PCR = 1
Clear bit TE in SCR3 to 0
End
Figure 10.21 Typical Multiprocessor Data Transmission Flow Chart
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10. Serial Communication Interface
SCI3 operates as follows during data transmission using a multiprocessor format.
SCI3 monitors bit TDRE in SSR. When this bit is cleared to 0, SCI3 recognizes that there is data
written in the transmit data register (TDR), which it transfers to the transmit shift register (TSR).
Then TDRE is set to 1 and transmission starts. If bit TIE in SCR3 is set to 1, a TXI interrupt is
requested.
Serial data is transmitted from pin TXD using the communication format outlined in
table 10.14.
Next, TDRE is checked as the stop bit is being transmitted. If TDRE is 0, data is transferred from
TDR to TSR, and after the stop bit is sent, transmission of the next frame starts. If TDRE is 1, the
TEND bit in SSR is set to 1, and after the stop bit is sent the output remains at 1 (mark state). A
TEI interrupt is requested in this state if bit TEIE in SCR3 is set to 1.
Figure 10.22 shows a typical SCI3 operation in multiprocessor communication mode.
Transmit
data
Start
bit
Serial
data
1
0
D0
D1
D7
MPB
0/1
Transmit
data
Stop Start
bit
bit
1
1 frame
0
D0
D1
D7
MPB
0/1
Stop Mark
bit
state
1
1 frame
TDRE
TEND
LSI
TXI request
operation
TDRE cleared
to 0
User
processing
Write data in
TDR
TXI
request
TEI
request
Figure 10.22 Typical Multiprocessor Format Transmit Operation
(8-Bit Data, Multiprocessor Bit Added, and 1 Stop Bit)
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1
10. Serial Communication Interface
Receiving Multiprocessor Data: Figure 10.23 shows a typical flow chart for receiving data using
a multiprocessor format. After SCI3 initialization, follow the procedure below.
Start
1
Set bit MPIE in SCR3 to 1
2
Read bits OER and FER in SSR
1. Set bit MPIE in serial control register 3 (SCR3) to 1.
Yes
2. Read bits OER and FER in the serial status register (SSR)
to determine if an error has occurred. If a receive error has
occurred, receive error processing is executed.
No
3. Read the serial status register (SSR) and confirm that
RDRF = 1. If RDRF = 1, read the data in the received data
register (RDR) and compare it with the processor’s own ID.
If the received data does not match the ID, set bit MPIE to
1 again. Bit RDRF is automatically cleared to 0 when data
in the received data register (RDR) is read.
OER + FER = 1?
3
No
Read bit RDRF in SSR
RDRF = 1?
Yes
4. Read SSR, check that bit RDRF = 1, then read received
data from the receive data register (RDR).
Read received data in RDR
No
Own ID?
5. If a receive error occurs, read bits OER and FER in SSR
to determine which error occurred. After the necessary
error processing, be sure to clear the error flags to 0.
Serial data transfer cannot take place while
bit OER or FER is set to 1.
When a framing error occurs, a break can be detected by
reading the RXD pin value.
Yes
Read bits OER and FER in SSR
Yes
OER + FER = 1?
No
4
Read bit RDRF in SSR
No
RDRF = 1?
Yes
Read received data in RDR
5 Error processing
Yes
Continue receiving?
No
A
Start receive error processing
Clear bit RE in SCR3 to 0
Overrun error
processing
Yes
OER = 1?
End
No
Yes
Yes
Break?
FER = 1?
No
No
Clear bits OER and
FER in SSR to 0.
End receive error processing
Framing error
processing
A
Figure 10.23 Typical Flow Chart for Receiving Serial Data Using Multiprocessor Format
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10. Serial Communication Interface
Figure 10.24 gives an example of data reception using a multiprocessor format.
Start
bit
Serial
data
1
0
Receive
data (ID1)
D0
D1
Stop Start
bit
MPB bit
D7
1
1
0
Receive
data (data 1)
D0
D1
1 frame
D7
Stop
MPB bit
0
Mark
(idle state)
1
1
1 frame
MPIE
RDRF
RDR
value
ID1
LSI operation
RXI request
MPIE cleared to 0
RDRF cleared to 0
Read data from RDR
User processing
No RXI request
RDR state retained
If not own ID,
set MPIE to 1 again
(a) Data does not match own ID
Start
bit
Serial
data
1
0
Receive
data (ID2)
D0
D1
Stop Start
MPB bit
bit
D7
1
1
0
Receive
data (data 2)
D0
D1
1 frame
D7
Stop
MPB bit
0
Mark
(idle state)
1
1
1 frame
MPIE
RDRF
RDR
value
ID1
LSI operation
Data 2
ID2
RXI request
MPIE cleared to 0
RDRF cleared to 0
Read data from RDR
User processing
RXI
request
RDRF
cleared
to 0
If own ID, continue
receiving
(b) Data matches own ID
Figure 10.24 Example of Multiprocessor Format Receive Operation
(8-Bit Data, Multiprocessor Bit Added, and 1 Stop Bit)
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Read data
from RDR
and set
MPIE to 1
again
10. Serial Communication Interface
10.3.7
Interrupts
SCI3 has six interrupt sources: transmit end, transmit data empty, receive data full, and the three
receive error interrupts (overrun error, framing error, and parity error). All share a common
interrupt vector. Table 10.16 describes each interrupt.
Table 10.16 SCI3 Interrupts
Interrupt
Description
Vector Address
RXI
Interrupt request due to receive data register full (RDRF)
H'0024
TXI
Interrupt request due to transmit data register empty (TDRE)
TEI
Interrupt request due to transmit end (TEND)
ERI
Interrupt request due to receive error (OER, FER, or PER)
The interrupt requests are enabled and disabled by bits TIE and RIE of SCR3.
When bit TDRE in SSR is set to 1, TXI is requested. When bit TEND in SSR is set to 1, TEI is
requested. These two interrupt requests occur during data transmission.
The initial value of bit TDRE is 1. Accordingly, if the transmit data empty interrupt request (TXI)
is enabled by setting bit TIE to 1 in SCR3 before placing transmit data in TDR, TXI will be
requested even though no transmit data has been readied.
Likewise, the initial value of bit TEND in SSR is 1. Accordingly, if the transmit end interrupt
request (TEI) is enabled by setting bit TEIE to 1 in SCR3 before placing transmit data in TDR,
TEI will be requested even though no data has been transmitted.
These interrupt features can be used to advantage by programming the interrupt handler to move
the transmit data into TDR. When this technique is not used, the interrupt enable bits (TIE and
TEIE) should not be set to 1 until after TDR has been loaded with transmit data, to avoid
unwanted TXI and TEI interrupts.
When bit RDRF in SSR is set to 1, RXI is requested. When any of SSR bits OER, FER, or PER is
set to 1, ERI is requested. These two interrupt requests occur during the receiving of data.
Details on interrupts are given in section 3.3, Interrupts.
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10. Serial Communication Interface
10.3.8
Application Notes
When using SCI3, attention should be paid to the following matters.
Relation between Bit TDRE and Writing Data to TDR: Bit TDRE in the serial status register
(SSR) is a status flag indicating that TDR does not contain new transmit data. TDRE is
automatically cleared to 0 when data is written to TDR. When SCI3 transfers data from TDR to
TSR, bit TDRE is set to 1.
Data can be written to TDR regardless of the status of bit TDRE. However, if new data is written
to TDR while TDRE is cleared to 0, assuming the data held in TDR has not yet been shifted to
TSR, it will be lost. For this reason it is advisable to confirm that bit TDRE is set to 1 before each
write to TDR and not write to TDR more than once without checking TDRE in between.
Operation when Multiple Receive Errors Occur at the Same Time: When two or more receive
errors occur at the same time, the status flags in SSR are set as shown in table 10.17. If an overrun
error occurs, data is not transferred from RSR to RDR, and receive data is lost.
Table 10.17 SSR Status Flag States and Transfer of Receive Data
SSR Status Flags
RDRF* OER
FER
PER
Receive Data Transfer
(RSR → RDR)
Receive Error Status
1
1
0
0
Not transferred
Overrun error
0
0
1
0
Transferred
Framing error
0
0
0
1
Transferred
Parity error
1
1
1
0
Not transferred
Overrun error + framing error
1
1
0
1
Not transferred
Overrun error + parity error
0
0
1
1
Transferred
Framing error + parity error
1
1
1
1
Not transferred
Overrun error + framing error + parity error
Note:
*
RDRF keeps the same state as before the data was received. However, if due to a late
read of received data in one frame an overrun error occurs in the next frame, RDRF is
cleared to 0 when RDR is read.
Break Detection and Processing: Break signals can be detected by reading the RXD pin directly
when a framing error (FER) is detected. In the break state the input from the RXD pin consists of
all 0s, so FER is set and the parity error flag (PER) may also be set. In the break state SCI3
continues to receive, so if the FER bit is cleared to 0 it will be set to 1 again.
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10. Serial Communication Interface
Sending a Mark or Break Signal: When TE is cleared to 0 the TXD pin becomes an I/O port, the
level and direction (input or output) of which are determined by the PDR and PCR bits. This
feature can be used to place the TXD pin in the mark state or send a break signal.
To place the serial communication line in the mark (1) state before TE is set to 1, set the PDR and
PCR bits both to 1. Since TE is cleared to 0, TXD becomes a general output port outputting the
value 1.
To send a break signal during data transmission, set the PCR bit to 1 and clear the PDR bit to 0,
then clear TE to 0. When TE is cleared to 0 the transmitter is initialized, regardless of its current
state, so the TXD pin becomes an output port outputting the value 0.
Receive Error Flags and Transmit Operation (Sysnchronous Mode Only): When a receive
error flag (OER, PER, or FER) is set to 1, SCI3 will not start transmitting even if TDRE is cleared
to 0. Be sure to clear the receive error flags to 0 when starting to transmit. Note that clearing RE to
0 does not clear the receive error flags.
Receive Data Sampling Timing and Receive Margin in Asynchronous Mode: In asynchronous
mode SCI3 operates on a base clock with 16 times the bit rate frequency. In receiving, SCI3
synchronizes internally with the falling edge of the start bit, which it samples on the base clock.
Receive data is latched at the rising edge of the eighth base clock pulse. See figure 10.25.
16 clock cycles
8 clock cycles
Internal base
clock
Receive data
(RXD)
0
7
Start bit
15 0
7
D0
15 0
D1
Synchronization
sampling timing
Data sampling
timing
Figure 10.25 Receive Data Sampling Timing in Asynchronous Mode
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10. Serial Communication Interface
The receive margin in asynchronous mode can therefore be derived from the following equation.
M = {(0.5 – 1/2N) – (D – 0.5) / N – (L – 0.5) F} × 100% ............................ Equation (1)
M:
N:
D:
L:
F:
Receive margin (%)
Ratio of clock frequency to bit rate (N = 16)
Clock duty cycle (D = 0.5 to 1)
Frame length (L = 9 to 12)
Absolute value of clock frequency error
In equation (1), if F (absolute value of clock frequency error) = 0 and D (clock duty cycle) = 0.5,
the receive margin is 46.875% as given by equation (2) below.
When D = 0.5 and F = 0,
M = {0.5 – 1/(2 × 16)} × 100% = 46.875% ................................................ Equation (2)
This value is theoretical. In actual system designs a margin of from 20 to 30 percent should be
allowed.
Relationship between Bit RDRF and Reading RDR: While SCI3 is receiving, it checks the
RDRF flag. When a frame of data has been received, if the RDRF flag is cleared to 0, data
receiving ends normally. If RDRF is set to 1, an overrun error occurs.
RDRF is automatically cleared to 0 when the contents of RDR are read. If RDR is read more than
once, the second and later reads will be performed with RDRF cleared to 0. While RDRF is 0, if
RDR is read when reception of the next frame is just ending, data from the next frame may be
read. This is illustrated in figure 10.26.
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10. Serial Communication Interface
Communication line
Frame 1
Frame 2
Frame 3
Data 1
Data 2
Data 3
Data 1
Data 2
RDRF
RDR
A
RDR read
B
RDR read
At A , data 1 is read.
At B , data 2 is read.
Figure 10.26 Relationship between Data and RDR Read Timing
To avoid the situation described above, after RDRF is confirmed to be 1, RDR should only be read
once and should not be read twice or more.
When the same data must be read more than once, the data read the first time should be copied to
RAM, for example, and the copied data should be used. An alternative is to read RDR but leave a
safe margin of time before reception of the next frame is completed. Specifically, reading of RDR
should be completed before bit 7 is transferred in synchronous mode, or before the stop bit is
transferred in asynchronous mode.
Caution on Switching of SCK3 Function: If pin SCK3 is used as a clock output pin by SCI3 in
synchronous mode and is then switched to a general input/output pin (a pin with a different
function), the pin outputs a low level signal for half a system clock (φ) cycle immediately after it is
switched.
This can be prevented by either of the following methods according to the situation.
1. When an SCK3 function is switched from clock output to non clock-output
When stopping data transfer, issue one instruction to clear bits TE and RE in SCR3 to 0 and to
set bits CKE1 and CKE0 to 1 and 0, respectively. In this case, bit COM in SMR should be left
1. The above prevents SCK3 from being used as a general input/output pin. To avoid an
intermediate level of voltage from being applied to SCK3, the line connected to SCK3 should be
pulled up to the VCC level via a resistor, or supplied with output from an external device.
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10. Serial Communication Interface
2. When an SCK3 function is switched from clock output to general input/output
When stopping data transfer,
a. Issue one instruction to clear bits TE and RE in SCR3 to 0 and to set bits CKE1 and CKE0
to 1 and 0, respectively.
b. Clear bit COM in SMR to 0
c. Clear bits CKE1 and CKE0 in SCR3 to 0
Note that special care is also needed here to avoid an intermediate level of voltage from being
applied to SCK3.
Caution on Switching TxD Function: If pin TXD is used as a data output pin by SCI3 in
synchronous mode and is then switched to a general input/output pin (a pin with a different
function), the pin outputs a high level signal for one system clock (φ) cycle immediately after it is
switched.
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11. 14-Bit PWM (H8/3857 Group Only)
Section 11 14-Bit PWM (H8/3857 Group Only)
11.1
Overview
The H8/3857 Group is provided with a 14-bit PWM (pulse width modulator), which can be used
as a D/A converter by connecting a low-pass filter. The H8/3854 Group does not have this
module.
11.1.1
Features
Features of the 14-bit PWM are as follows.
• Choice of two conversion periods
A conversion period of 32,768/φ, with a minimum modulation width of 2/φ (PWCR0 = 1), or a
conversion period of 16,384/φ, with a minimum modulation width of 1/φ (PWCR0 = 0), can be
chosen.
• Pulse division method for less ripple
11.1.2
Block Diagram
Figure 11.1 shows a block diagram of the 14-bit PWM.
PWDRU
φ/2
PWM
waveform
generator
φ/4
Internal data bus
PWDRL
PWCR
PWM
Legend:
PWDRL: PWM data register L
PWDRU: PWM data register U
PWCR: PWM control register
Figure 11.1 Block Diagram of the 14 bit PWM
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11. 14-Bit PWM (H8/3857 Group Only)
11.1.3
Pin Configuration
Table 11.1 shows the output pin assigned to the 14-bit PWM.
Table 11.1 Pin Configuration
Name
Abbr.
I/O
Function
PWM output pin
PWM
Output
Pulse-division PWM waveform output
11.1.4
Register Configuration
Table 11.2 shows the register configuration of the 14-bit PWM.
Table 11.2 Register Configuration
Name
Abbr.
R/W
Initial Value
Address
PWM control register
PWCR
W
H'FE
H'FFD0
PWM data register U
PWDRU
W
H'C0
H'FFD1
PWM data register L
PWDRL
W
H'00
H'FFD2
11.2
Register Descriptions
11.2.1
PWM Control Register (PWCR)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
⎯
⎯
PWCR0
Initial value
1
1
1
1
1
1
1
0
Read/Write
⎯
⎯
⎯
⎯
⎯
⎯
⎯
W
PWCR is an 8-bit write-only register for input clock selection.
Upon reset, PWCR is initialized to H'FE.
Bits 7 to 1—Reserved Bits: Bits 7 to 1 are reserved; they are always read as 1, and cannot be
modified.
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11. 14-Bit PWM (H8/3857 Group Only)
Bit 0—Clock Select 0 (PWCR0): Bit 0 selects the clock supplied to the 14-bit PWM. This bit is a
write-only bit; it is always read as 1.
Bit 0: PWCR0
Description
0
The input clock is φ/2 (tφ∗ = 2/φ). The conversion period is 16,384/φ, with a
minimum modulation width of 1/φ.
(initial value)
1
The input clock is φ/4 (tφ∗ = 4/φ). The conversion period is 32,768/φ, with a
minimum modulation width of 2/φ.
Note: tφ: Period of PWM input clock
11.2.2
PWM Data Registers U and L (PWDRU, PWDRL)
Bit
7
6
PWDRU
⎯
⎯
Initial value
1
1
0
0
0
0
0
0
Read/Write
⎯
⎯
W
W
W
W
W
W
Bit
7
6
5
4
3
2
1
0
PWDRL
5
4
3
2
1
0
PWDRU5 PWDRU4 PWDRU3 PWDRU2 PWDRU1 PWDRU0
PWDRL7 PWDRL6 PWDRL5 PWDRL4 PWDRL3 PWDRL2 PWDRL1 PWDRL0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
PWDRU and PWDRL form a 14-bit write-only register, with the upper 6 bits assigned to PWDRU
and the lower 8 bits to PWDRL. The value written to PWDRU and PWDRL gives the total highlevel width of one PWM waveform cycle.
When 14-bit data is written to PWDRU and PWDRL, the register contents are latched in the PWM
waveform generator, updating the PWM waveform generation data. The 14-bit data should always
be written in the following sequence, first to PWDRL and then to PWDRU.
1. Write the lower 8 bits to PWDRL.
2. Write the upper 6 bits to PWDRU.
PWDRU and PWDRL are write-only registers. If they are read, all bits are read as 1.
Upon reset, PWDRU and PWDRL are initialized to H'C000.
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11. 14-Bit PWM (H8/3857 Group Only)
11.3
Operation
When using the 14-bit PWM, set the registers in the following sequence.
1. Set bit PWM in port mode register 1 (PMR1) to 1 so that pin P14/PWM is designated for PWM
output.
2. Set bit PWCR0 in the PWM control register (PWCR) to select a conversion period of either
32,768/φ (PWCR0 = 1) or 16,384/φ (PWCR0 = 0).
3. Set the output waveform data in PWM data registers U and L (PWDRU/L). Be sure to write in
the correct sequence, first PWDRL then PWDRU. When data is written to PWDRU, the data
in these registers will be latched in the PWM waveform generator, updating the PWM
waveform generation in synchronization with internal signals.
One conversion period consists of 64 pulses, as shown in figure 11.2. The total of the highlevel pulse widths during this period (TH) corresponds to the data in PWDRU and PWDRL.
This relation can be represented as follows.
TH = (data value in PWDRU and PWDRL + 64) × tφ /2
where tφ is the PWM input clock period, either 2/φ (bit PWCR0 = 0) or 4/φ (bit PWCR0 = 1).
Example: Settings in order to obtain a conversion period of 8,192 μs:
When bit PWCR0 = 0, the conversion period is 16,384/φ, so φ must be 2 MHz. In
this case tfn = 128 μs, with 1/φ (resolution) = 0.5 μs.
When bit PWCR0 = 1, the conversion period is 32,768/φ, so φ must be 4 MHz. In
this case tfn = 128 μs, with 2/φ (resolution) = 0.5 μs.
Accordingly, for a conversion period of 8,192 μs, the system clock frequency (φ)
must be 2 MHz or 4 MHz.
1 conversion period
t f1
t H1
t f2
t H2
t f63
t H3
t H63
TH = t H1 + t H2 + t H3 + ..... t H64
t f1 = t f2 = t f3 ..... = t f64
Figure 11.2 PWM Output Waveform
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t f64
t H64
12. A/D Converter
Section 12 A/D Converter
12.1
Overview
The H8/3857 Group and H8/3854 Group include a resistance-ladder-based successiveapproximation analog-to-digital converter. The maximum number of analog input channels is
eight in the H8/3857 Group and four in the H8/3854 Group.
12.1.1
Features
The A/D converter has the following features.
• 8-bit resolution
• Input channels
⎯ 8 in H8/3857 Group
⎯ 4 in H8/3854 Group
• Conversion time: approx. 12.4 μs per channel (at 5 MHz operation)
• Built-in sample-and-hold function
• Interrupt requested on completion of A/D conversion
• A/D conversion can be started by external trigger input
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12. A/D Converter
12.1.2
Block Diagram
Figure 12.1 shows a block diagram of the A/D converter.
ADTRG
A/D start
register
Multiplexer
AVCC*2
+
Comparator
–
AVCC*2
Reference
voltage
Control logic
Internal data bus
AN0*1
AN1*1
AN2*1
AN3*1
AN4
AN5
AN6
AN7
A/D mode
register
AVSS*2
A/D result register
AVSS*2
IRRAD
Notes: 1. AN0 to AN3 are functions of the H8/3857 Group only, and are not provided in the
H8/3854 Group.
2. AVCC and AVSS are functions of the H8/3857 Group only. In the H8/3854 Group,
AVCC = VCC and AVSS = VSS.
Figure 12.1 Block Diagram of the A/D Converter
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12. A/D Converter
12.1.3
Pin Configuration
Table 12.1 shows the A/D converter pin configuration.
Table 12.1 Pin Configuration
Name
I/O
Function
Analog power supply pin* AVCC
Input
Power supply and reference voltage of analog part
Analog ground pin*
AVSS
Input
Ground and reference voltage of analog part
Analog input pin 0*
AN0
Input
Analog input channel 0
Analog input pin 1*
AN1
Input
Analog input channel 1
Analog input pin 2*
AN2
Input
Analog input channel 2
Analog input pin 3*
AN3
Input
Analog input channel 3
Analog input pin 4
AN4
Input
Analog input channel 4
Analog input pin 5
AN5
Input
Analog input channel 5
Analog input pin 6
AN6
Input
Analog input channel 6
Analog input pin 7
AN7
Input
Analog input channel 7
External trigger input pin
ADTRG
Input
External trigger input for starting A/D conversion
Note:
12.1.4
Abbr.
*
The analog power supply pin, analog ground pin, and analog input pins 0 to 3 are
functions of the H8/3857 Group only, and are not provided in the H8/3854 Group.
In the H8/3854 Group, the analog power supply pin is the power supply pin (VCC), and
the analog ground pin is the ground pin (VSS).
Register Configuration
Table 12.2 shows the A/D converter register configuration.
Table 12.2 Register Configuration
Name
Abbr.
R/W
Initial Value
Address
A/D mode register
AMR
R/W
H'30
H'FFC4
A/D start register
ADSR
R/W
H'7F
H'FFC6
A/D result register
ADRR
R
Undefined
H'FFC5
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12. A/D Converter
12.2
Register Descriptions
12.2.1
A/D Result Register (ADRR)
Bit
Initial value
7
6
5
4
3
2
1
0
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
Read/Write
R
R
R
R
R
R
R
R
The A/D result register (ADRR) is an 8-bit read-only register for holding the results of analog-todigital conversion.
ADRR can be read by the CPU at any time, but the ADRR values during A/D conversion are not
fixed.
After A/D conversion is complete, the conversion result is stored in ADRR as 8-bit data; this data
is held in ADRR until the next conversion operation starts.
ADRR is not cleared on reset.
12.2.2
A/D Mode Register (AMR)
Bit
7
6
5
4
3
2
1
0
CKS
TRGE
⎯
⎯
CH3
CH2
CH1
CH0
Initial value
0
0
1
1
0
0
0
0
Read/Write
R/W
R/W
⎯
⎯
R/W
R/W
R/W
R/W
AMR is an 8-bit read/write register for specifying the A/D conversion speed, external trigger
option, and the analog input pins.
Upon reset, AMR is initialized to H'30.
Bit 7—Clock Select (CKS): Bit 7 sets the A/D conversion speed.
Conversion Time
Bit 7: CKS
Conversion Period
φ = 2 MHz
φ = 5 MHz
0
62/φ (initial value)
31 μs
12.4 μs
1
31/φ
15.5 μs
⎯*
Note:
*
Operation is not guaranteed if the conversion time is less than 12.4 μs. Set bit 7 for a
value of at least 12.4 μs.
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12. A/D Converter
Bit 6—External Trigger Select (TRGE): Bit 6 enables or disables the start of A/D conversion by
external trigger input.
Bit 6: TRGE
Description
0
Disables start of A/D conversion by external trigger
1
Enables start of A/D conversion by rising or falling edge of external trigger at
pin ADTRG*
Note:
*
(initial value)
The external trigger (ADTRG) edge is selected by bit INTEG4 of the IRQ edge select
register (IEGR). See Interrupt Edge Select Register (IEGR) in section 3.3.2, Interrupt
Control Registers, for details.
Bits 5 and 4—Reserved Bits: Bits 5 and 4 are reserved; they are always read as 1, and cannot be
modified.
Bits 3 to 0—Channel Select (CH3 to CH0): Bits 3 to 0 select the analog input channel.
The channel selection should be made while bit ADSF is cleared to 0.
Bit 3:
CH3
Bit 2:
CH2
Bit 1:
CH1
Bit 0:
CH0
Analog Input Channel
0
0
*
*
No channel selected
1
0
1
1
0
0
1
1
1
*
(initial value)
1
0
AN0*
1
AN1*1
0
AN2*1
1
AN3*1
0
AN4
1
AN5
0
AN6
1
AN7
*
Reserved
Legend: * Don't care
Note:
1. Channels AN0 to AN3 are functions of the H8/3857 Group only, and must not be
selected in the H8/3854 Group.
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12. A/D Converter
12.2.3
A/D Start Register (ADSR)
Bit
7
6
5
4
3
2
1
0
ADSF
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Initial value
0
1
1
1
1
1
1
1
Read/Write
R/W
⎯
⎯
⎯
⎯
⎯
⎯
⎯
The A/D start register (ADSR) is an 8-bit read/write register for starting and stopping A/D
conversion.
A/D conversion is started by writing 1 to the A/D start flag (ADSF) or by input of the designated
edge of the external trigger signal, which also sets ADSF to 1. When conversion is complete, the
converted data is set in the A/D result register (ADRR), and at the same time ADSF is cleared
to 0.
Bit 7—A/D Start Flag (ADSF): Bit 7 controls and indicates the start and end of A/D conversion.
Bit 7: ADSF
0
Description
Read: Indicates the completion of A/D conversion
(initial value)
Write: Stops A/D conversion
1
Read: Indicates A/D conversion in progress
Write: Starts A/D conversion
Bits 6 to 0—Reserved Bits: Bits 6 to 0 are reserved; they are always read as 1, and cannot be
modified.
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12. A/D Converter
12.3
Operation
12.3.1
A/D Conversion Operation
The A/D converter operates by successive approximations, and yields its conversion result as 8-bit
data.
A/D conversion begins when software sets the A/D start flag (bit ADSF) to 1. Bit ADSF keeps a
value of 1 during A/D conversion, and is cleared to 0 automatically when conversion is complete.
The completion of conversion also sets bit IRRAD in interrupt request register 2 (IRR2) to 1. An
A/D conversion end interrupt is requested if bit IENAD in interrupt enable register 2 (IENR2) is
set to 1.
If the conversion time or input channel needs to be changed in the A/D mode register (AMR)
during A/D conversion, bit ADSF should first be cleared to 0, stopping the conversion operation,
in order to avoid malfunction.
12.3.2
Start of A/D Conversion by External Trigger Input
The A/D converter can be made to start A/D conversion by input of an external trigger signal.
External trigger input is enabled at pin ADTRG when bit IRQ4 in port mode register 2 (PMR2) is
set to 1, and bit TRGE in AMR is set to 1. Then when the input signal edge designated in bit IEG4
of the IRQ edge select register (IEGR) is detected at pin ADTRG, bit ADSF in ADSR will be set
to 1, starting A/D conversion.
Figure 12.2 shows the timing.
φ
Pin ADTRG
(when bit
IEG4 = 0)
ADSF
A/D conversion
Figure 12.2 External Trigger Input Timing
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12. A/D Converter
12.4
Interrupts
When A/D conversion ends (ADSF changes from 1 to 0), bit IRRAD in interrupt request
register 2 (IRR2) is set to 1.
A/D conversion end interrupts can be enabled or disabled by means of bit IENAD in interrupt
enable register 2 (IENR2).
For further details see section 3.3, Interrupts.
12.5
Typical Use
An example of how the A/D converter can be used is given below, using channel 1 (pin AN1) as
the analog input channel. Figure 12.3 shows the operation timing.
• Bits CH3 to CH0 of the A/D mode register (AMR) are set to 0101, making pin AN1 the analog
input channel. A/D interrupts are enabled by setting bit IENAD to 1, and A/D conversion is
started by setting bit ADSF to 1.
• When A/D conversion is complete, bit IRRAD is set to 1, and the A/D conversion result is
stored in the A/D result register (ADRR). At the same time ADSF is cleared to 0, and the A/D
converter goes to the idle state.
• Bit IENAD = 1, so an A/D conversion end interrupt is requested.
• The A/D interrupt handling routine starts.
• The A/D conversion result is read and processed.
• The A/D interrupt handling routine ends.
If ADSF is set to 1 again afterward, A/D conversion starts and steps 2 through 6 take place.
Figures 12.4 and 12.5 show flow charts of procedures for using the A/D converter.
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Idle
A/D conversion starts
A/D conversion (1)
Set *
Set *
Note: * ( ) indicates instruction execution by software.
ADRR
Channel 1 (AN1)
operation state
ADSF
IENAD
Interrupt
(IRRAD)
A/D conversion (2)
A/D conversion result (1)
Read conversion result
Idle
Set *
A/D conversion result (2)
Read conversion result
Idle
12. A/D Converter
Figure 12.3 Typical A/D Converter Operation Timing
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12. A/D Converter
Start
Set A/D conversion speed
and input channel
Disable A/D conversion
end interrupt
Start A/D conversion
Read ADSR
No
ADSF = 0?
Yes
Read ADRR data
Yes
Perform A/D
conversion?
No
End
Figure 12.4 Flow Chart of Procedure for Using A/D Converter (1) (Polling by Software)
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12. A/D Converter
Start
Set A/D conversion speed
and input channels
Enable A/D conversion
end interrupt
Start A/D conversion
A/D conversion
end interrupt?
No
Yes
Clear bit IRRAD to
0 in IRR2
Read ADRR data
Yes
Perform A/D
conversion?
No
End
Figure 12.5 Flow Chart of Procedure for Using A/D Converter (2) (Interrupts Used)
12.6
Application Notes
• Data in the A/D result register (ADRR) should be read only when the A/D start flag (ADSF) in
the A/D start register (ADSR) is cleared to 0.
• Changing the digital input signal at an adjacent pin during A/D conversion may adversely
affect conversion accuracy.
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12. A/D Converter
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13. Dot Matrix LCD Controller (H8/3857 Group)
Section 13 Dot Matrix LCD Controller
(H8/3857 Group)
13.1
Overview
The LCD controller has built-in display RAM, and performs dot matrix LCD display. One bit of
display RAM data corresponds to illumination or non-illumination of one dot on the LCD panel,
making possible displays with an extremely high degree of freedom.
The LCD controller incorporates all the functions required for LCD display, allowing a dot matrix
display of up to 40 × 32 dots.
I/O ports are used for the interface with the CPU, offering excellent software heritability when
using a combination of MPU and LCD driver.
This module operates on the subclock, making it ideal for use in small portable devices.
13.1.1
Features
• Built-in bit-mapped display RAM (2084 bits)
Maximum of 1280 display bits (selectable from 40 × 32 bits, 56 × 16 bits, 64 × 8 bits, 40 × 16
bits, or 40 × 8 bits)
• Choice of 1/8, 1/16, or 1/32 duty
• Low power consumption enabling extended drive on battery power
Subclock operation
Module standby
• Built-in 2X or 3X LCD power supply step-up circuit
• Comprehensive display control functions
Display data read/write, display on/off control, vertical display scrolling, arbitrary area
blinking, read-modify-write
• CPU interface
I/O port interface
• Built-in contrast control circuit
• Built-in LCD power supply bleeder resistances and voltage follower type op-amp circuits
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.1.2
Block Diagram
Figure 13.1 shows a block diagram of the LCD controller.
COM17/ COM32/
SEG56 SEG41 SEG40
Common/segment
driver
COM16/ COM9/
SEG1 SEG57 SEG64 COM8
Common/segment
driver
Segment driver
COM1
Common driver
Level shifter
MPX
MPX
MPX
MPX
Common counter
Decoder
Blink counter
Blink control
Blink start
line register
Latch 2
Latch 1
Blink end
line register
Comparator
Y decoder
Display
line counter
64 × 32-bit display memory
M
P
X
Display start
line register
X decoder
Address register
Display data register
Control register 1/2
Blink register
Index register
Contrast control
register
Frame frequency
setting register
LCD drive level power supply selection circuit
V4OUT
V1OUT
V2OUT
V3OUT
VLCD
V3
V5OUT
LCD drive step-up circuit
VLOUT
Vci
V34
V4
C1+
C2+
C1–
C2–
CPU interface
DB6
R/W
STRB
DB1
DB4
DB7
RS
DB5
DB3
DB2
Chip-internal I/O port interface
Figure 13.1 Block Diagram of LCD Controller
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DB0
13. Dot Matrix LCD Controller (H8/3857 Group)
13.1.3
Pin Configuration
Table 13.1 shows the pins assigned to the LCD controller.
Table 13.1 Pin Configuration
Pin Name
Abbr.
I/O
Common output pins
COM1 to COM32
Output LCD common drive pins
Segment output pins
SEG1 to SEG64
Output LCD segment drive pins
LCD bias setting pins
V3, V4
Input
LCD bias setting
LCD test pin
V34
Input
Internal resistance test pins, shorted to V3
LCD step-up capacitance
connection pins
C1+, C1–
C2+, C2–
⎯
For connection of external capacitances
for LCD step-up
LCD drive power supply
level
V1OUT to V5OUT I/O
LCD drive power supply level input/output
pins
LCD step-up circuit
reference power supply
VCi
Reference input voltage for LCD step-up
circuit, also functioning as step-up circuit
power supply
Input
Function
LCD step-up power supply VLOUT
output pin
Output LCD step-up voltage output pin
LCD drive power supply
Input
VLCD
LCD drive power supply input pin
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.1.4
Register Configuration
The LCD controller has one index register and ten control registers, all of which are accessed via
an I/O port interface. Except for the display data register (LR4), these registers cannot be read.
The LCD controller register configuration is shown in table 13.2.
Table 13.2 Register Configuration
Index Register
Name
Abbr.
R/W
RS
IR3
IR2
IR1
IR0
Index register
IR
W
0
⎯
⎯
⎯
⎯
Control register 1
LR0
W
1
0
0
0
0
Control register 2
LR1
W
Address register
LR2
W
Frame frequency setting register
LR3
W
Display data register
LR4
R/W
Display start line register
LR5
W
Blink register
LR6
W
Blink start line register
LR8
W
Blink end line register
LR9
W
Contrast control register
LRA
W
13.2
Register Descriptions
13.2.1
Index Register (IR)
Bit
1
1
0
1
1
0
0
1
1
0
1
0
0
0
1
1
0
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
IR3
IR2
IR1
IR0
Initial value
⎯
⎯
⎯
⎯
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
W
W
W
W
IR is an 8-bit write-only register that selects one of the LCD controller's ten control registers. IR is
selected when RS is 0.
Upon reset, IR is initialized to H'00.
Bits 7 to 4—Reserved Bits: Bits 7 to 4 are reserved; they should always be cleared to 0.
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13. Dot Matrix LCD Controller (H8/3857 Group)
Bits 3 to 0—Index Register (IR3 to IR0): Bits 3 to 0 are used to select one of the LCD
controller's ten control registers. The correspondence between the settings of IR3 to IR0 and the
selected registers is shown in table 13.2. Other settings are invalid.
13.2.2
Control Register 1 (LR0)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
LSBY
PWR
⎯
SOB
DDTY1
DDTY0
Initial value
⎯
⎯
0
0
⎯
0
0
0
Read/Write
⎯
⎯
W
W
⎯
W
W
W
LR0 is an 8-bit write-only register that performs LCD module standby mode setting, step-up
circuit control, switching between character display and graphic display, and drive duty selection.
Upon reset, LR0 is initialized to H'00.
Bits 7 and 6—Reserved Bits: Bits 7 and 6 are reserved; they should always be cleared to 0.
Bit 5—Module Standby (LSBY): Bit 5 is the module standby setting bit. When LSBY is set to 1,
the LCD controller enters standby mode. At this time, the state of the PWR bit is not affected, but
the DISP and OPON bits in LR1 are reset.
Bit 5: LSBY Description
0
LCD controller operates normally
(initial value)
1
Step-up and internal operations halt, display is turned off, and LCD controller enters
standby mode
Bit 4—Step-Up Circuit Operation Setting (PWR): Bit 4 selects operation or halting of the stepup circuit.
Bit 4: PWR
Description
0
Step-up circuit halts
1
Step-up circuit operates
(initial value)
Bit 3—Reserved Bit: Bit 3 is reserved; it should always be cleared to 0.
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13. Dot Matrix LCD Controller (H8/3857 Group)
Bit 2—Display Mode Select (SOB): Bit 2 selects either character display mode or graphic
display mode.
Bit 2: SOB
Description
0
Character display mode
Bits 4 to 0 of one display memory data byte are output to the segment pins
(initial value)
1
Graphic display mode
All bits in one display memory data byte are output to the segment pins
The X address that can be output is in the range H'0 to H'4 in the case of 1/32 duty,
H'0 to H'6 in the case of 1/16 duty, and H'0 to H'7 in the case of 1/8 duty
Bits 1 and 0—Display Duty Select (DDTY1, DDTY0): Bits 1 and 0 select a display duty of 1/32,
1/16, or 1/8.
Bit 1: DDTY1 Bit 0: DDTY0 Description
0
0
1/32 duty selected
1
1/16 duty selected
Y address H'10 to H'1F display data is invalid
1
*
1/8 duty selected
Y address H'8 to H'1F display data is invalid
Legend: * Don't care
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(initial value)
13. Dot Matrix LCD Controller (H8/3857 Group)
13.2.3
Control Register 2 (LR1)
Bit
7
6
5
4
3
2
1
0
⎯
DISP
⎯
OPON
RMW
⎯
INC
BLK
Initial value
⎯
0
⎯
0
0
⎯
0
0
Read/Write
⎯
W
⎯
W
W
⎯
W
W
LR1 is an 8-bit write-only register that selects operation or halting of LCD display and the op-amp
circuits, performs read-modify-write mode setting, and selects the address to be incremented in the
display memory.
Upon reset, LR1 is initialized to H'00.
Bit 7—Reserved Bit: Bit 7 is reserved; it should always be cleared to 0.
Bit 6—LCD Operation Setting (DISP): Bit 6 selects operation or halting of the LCD display.
When the LSBY bit in LR0 is set to 1, DISP is cleared.
Bit 6: DISP
Description
0
LCD is turned off. All LCD outputs go to the VSS level
1
LCD is turned on
(initial value)
Bit 5—Reserved Bit: Bit 5 is reserved; it should always be cleared to 0.
Bit 4—Op-Amp Circuit Operation Setting (OPON): Bit 4 selects operation or halting of the opamp circuits. When the LCD drive power supply level is applied to V1OUT to V5OUT from an
external source, OPON must be cleared to 0.
When the LSBY bit in LR0 is set to 1, OPON is cleared.
Bit 4: OPON Description
0
Built-in op-amps are halted, and output becomes high-impedance. LCD drive
voltage can be input from external source
(initial value)
1
Built-in op-amps operate
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13. Dot Matrix LCD Controller (H8/3857 Group)
Bit 3—Read-Modify-Write Setting (RMW): Bit 3 selects whether display memory X or Y
address incrementing is carried out after a write/read access, or only after a write access (readmodify-write mode).
Bit 3: RMW
Description
0
Address is incremented after write/read access to display memory
1
Read-modify-write mode is set
(initial value)
In this mode, address is incremented only after write access to display memory
Bit 2—Reserved Bit: Bit 2 is reserved; it should always be cleared to 0.
Bit 1—Increment Address Select (INC): Bit 1 selects either the X address or the Y address as
the address to be incremented after the display memory access specified by the RMW bit. The
selected address is cleared after a display memory access with the maximum value for the valid
display data area; in this case the other address is incremented.
Bit 1: INC
Description
0
Incrementing of display memory Y address has priority; X address is incremented
after Y address overflow
(initial value)
1
Incrementing of display memory X address has priority; Y address is incremented
after X address overflow
Bit 0—Blink Operation Setting (BLK): Bit 0 enables or disables the blink function. If BLK is
set to 1 while the DISP bit is set to 1 and LCD display is operating, the blink function is enabled
and blinking operates in the range set by BK7 to BK0 in LR6, BSL4 to BSL0 in LR8, and BEL4
to BEL0 in LR9.
Bit 0: BLK
Description
0
Blinking is disabled
1
Blinking is enabled
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(initial value)
13. Dot Matrix LCD Controller (H8/3857 Group)
13.2.4
Address Register (LR2)
Bit
7
6
5
4
3
2
1
0
XA2
XA1
XA0
YA4
YA3
YA2
YA1
YA0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
LR2 is an 8-bit write-only register that sets the display memory X- and Y-direction addresses
accessed by the CPU.
Upon reset, LR2 is initialized to H'00.
Bits 7 to 5—X Address Setting (XA2 to XA0): Bits 7 to 5 set the display memory X-direction
address. A value from H'0 to H'7 can be set, but if the SOB bit in LR0 is set to 1, display data H'7
is invalid with 1/16 duty, and display data from H'5 to H'7 is invalid with 1/32 duty.
When the INC bit in LR1 is set to 1, the address is automatically incremented after the access
specified by the RMW bit in LR1, and is cleared after an access with the maximum value for the
valid display data area. When INC is 0 and YA4 to YA0 represent the maximum value for the
valid display data area, the address is incremented after the access specified by RMW.
Bits 4 to 0—Y Address Setting (YA4 to YA0): Bits 4 to 0 set the display memory Y-direction
address. A value from H'00 to H'1F can be set, but display data from H'10 to H'1F is invalid with
1/16 duty, and display data from H'08 to H'1F is invalid with 1/8 duty.
When the INC bit in LR1 is cleared to 0, the address is automatically incremented after the access
specified by the RMW bit in LR1, and is cleared after an access with the maximum value for the
valid display data area. When INC is 1 and XA2 to XA0 represent the maximum value for the
valid display data area, the address is incremented after the access specified by RMW.
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.2.5
Frame Frequency Setting Register (LR3)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
FS5
FS4
FS3
FS2
FS1
FS0
Initial value
⎯
⎯
0
0
0
0
0
0
Read/Write
⎯
⎯
W
W
W
W
W
W
LR3 is an 8-bit write-only register that sets the frame frequency.
Upon reset, LR3 is initialized to H'00.
Bits 7 and 6—Reserved Bits: Bits 7 and 6 are reserved; they should always be cleared to 0.
Bits 5 to 0—Frame Frequency Setting (FS5 to FS0): Bits 5 to 0 control the subclock division
ratio and set the LCD frame frequency. The relationship between the LCD frame frequency fF
(Hz), the subclock frequency fW (Hz), the division ratio r, and the LCD duty 1/N is as follows:
fF =
fW
r×N
Set a division ratio suitable for the characteristics of the LCD panel used. The correspondence
between register settings and division ratios is shown in table 13.3.
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13. Dot Matrix LCD Controller (H8/3857 Group)
Table 13.3 Register Settings and Division Ratios
FS
FS
FS
FS
Division
Division
Division
Division
5 4 3 2 1 0 Ratio r
5 4 3 2 1 0 Ratio r
5 4 3 2 1 0 Ratio r
5 4 3 2 1 0 Ratio r
0 0 0 0 0 0 2
0 1 0 0 0 0 34
1 0 0 0 0 0 66
1 1 0 0 0 0 98
0 0 0 0 0 1 4
0 1 0 0 0 1 36
1 0 0 0 0 1 68
1 1 0 0 0 1 100
0 0 0 0 1 0 6
0 1 0 0 1 0 38
1 0 0 0 1 0 70
1 1 0 0 1 0 102
0 0 0 0 1 1 8
0 1 0 0 1 1 40
1 0 0 0 1 1 72
1 1 0 0 1 1 104
0 0 0 1 0 0 10
0 1 0 1 0 0 42
1 0 0 1 0 0 74
1 1 0 1 0 0 106
0 0 0 1 0 1 12
0 1 0 1 0 1 44
1 0 0 1 0 1 76
1 1 0 1 0 1 108
0 0 0 1 1 0 14
0 1 0 1 1 0 46
1 0 0 1 1 0 78
1 1 0 1 1 0 110
0 0 0 1 1 1 16
0 1 0 1 1 1 48
1 0 0 1 1 1 80
1 1 0 1 1 1 112
0 0 1 0 0 0 18
0 1 1 0 0 0 50
1 0 1 0 0 0 82
1 1 1 0 0 0 114
0 0 1 0 0 1 20
0 1 1 0 0 1 52
1 0 1 0 0 1 84
1 1 1 0 0 1 116
0 0 1 0 1 0 22
0 1 1 0 1 0 54
1 0 1 0 1 0 86
1 1 1 0 1 0 118
0 0 1 0 1 1 24
0 1 1 0 1 1 56
1 0 1 0 1 1 88
1 1 1 0 1 1 120
0 0 1 1 0 0 26
0 1 1 1 0 0 58
1 0 1 1 0 0 90
1 1 1 1 0 0 122
0 0 1 1 0 1 28
0 1 1 1 0 1 60
1 0 1 1 0 1 92
1 1 1 1 0 1 124
0 0 1 1 1 0 30
0 1 1 1 1 0 62
1 0 1 1 1 0 94
1 1 1 1 1 0 126
0 0 1 1 1 1 32
0 1 1 1 1 1 64
1 0 1 1 1 1 96
1 1 1 1 1 1 128
Examples of subclock frequency, LCD duty, and division ratio settings, and frame frequencies, are
shown in table 13.4.
Table 13.4 Sample Frame Frequency Settings
Subclock Frequency (kHz)
Display Duty 1/N
32.768
38.4
1/8
Division ratio r
48
56
Frame frequency fF (Hz)
85.3
85.7
1/16
Division ratio r
24
28
Frame frequency fF (Hz)
85.3
85.7
1/32
Division ratio r
12
14
Frame frequency fF (Hz)
85.3
85.7
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.2.6
Display Data Register (LR4)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LR4 is an 8-bit read/write register used to perform read/write access to the display memory
specified by XA2 to XA0 and YA4 to YA0 in LR2.
In a write to display memory, the write is performed directly to the display memory via this
register. In a read, the data is temporarily latched into this register before being output to the bus.
After a reset, the display memory and LR4 contents are undefined.
13.2.7
Display Start Line Register (LR5)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
ST4
ST3
ST2
ST1
ST0
Initial value
⎯
⎯
⎯
0
0
0
0
0
Read/Write
⎯
⎯
⎯
W
W
W
W
W
LR5 is an 8-bit write-only register that specifies the line at which display starts.
Upon reset, LR5 is initialized to H'00.
Bits 7 to 5—Reserved Bits: Bits 7 to 5 are reserved; they should always be cleared to 0.
Bits 4 to 0—Display Start Line Setting (ST4 to ST0): Bits 4 to 0 specify the line at which
display starts. Set a value of [display start line – 1].
Changing the setting in this register enables vertical scrolling to be implemented. The possible
settings are 0 to 31 for 1/32 duty, 0 to 15 for 1/16 duty, and 0 to 7 for 1/8 duty. Display will not be
performed normally if these ranges are exceeded.
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.2.8
Blink Register (LR6)
Bit
7
6
5
4
3
2
1
0
BK7
BK6
BK5
BK4
BK3
BK2
BK1
BK0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
LR6 is an 8-bit write-only register that specifies blink areas. An area is made to blink by writing 1
to the corresponding bit in this register. There are no restrictions on areas that can blink
simultaneously, and the entire screen can be made to blink by writing 1 to all the bits. The setting
in this register is valid only when the BLK bit in LR1 is set to 1.
The blink areas corresponding to the register bits depend on the value of the SOB bit in LR0, as
shown below.
SOB
BK7
BK6
BK5
BK4
BK3
BK2
BK1
BK0
0
SEG36 to SEG31 to SEG26 to SEG21 to SEG16 to SEG11 to SEG6 to
SEG40
SEG35
SEG30
SEG25
SEG20
SEG15
SEG10
SEG1 to
SEG5
1
SEG57 to SEG49 to SEG41 to SEG33 to SEG25 to SEG17 to SEG9 to
SEG64
SEG56
SEG48
SEG40
SEG32
SEG24
SEG16
SEG1 to
SEG8
Upon reset, LR6 is initialized to H'00.
13.2.9
Blink Start Line Register (LR8)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
BSL4
BSL3
BSL2
BSL1
BSL0
Initial value
⎯
⎯
⎯
0
0
0
0
0
Read/Write
⎯
⎯
⎯
W
W
W
W
W
LR8 is an 8-bit write-only register that specifies the start line of an area made to blink.
Upon reset, LR8 is initialized to H'00.
Bits 7 to 5—Reserved Bits: Bits 7 to 5 are reserved; they should always be cleared to 0.
Bits 4 to 0—Blink Start Line Setting (BSL4 to BSL0): Bits 4 to 0 specify the start line of an
area made to blink. Set a value of [blink start line – 1].
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13. Dot Matrix LCD Controller (H8/3857 Group)
The possible settings are 0 to 31 for 1/32 duty, 0 to 15 for 1/16 duty, and 0 to 7 for 1/8 duty.
Normal operation is not guaranteed if these ranges are exceeded.
13.2.10 Blink End Line Register (LR9)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
BEL4
BEL3
BEL2
BEL1
BEL0
Initial value
⎯
⎯
⎯
0
0
0
0
0
Read/Write
⎯
⎯
⎯
W
W
W
W
W
LR9 is an 8-bit write-only register that specifies the end line of an area made to blink.
Upon reset, LR9 is initialized to H'00.
Bits 7 to 5—Reserved Bits: Bits 7 to 5 are reserved; they should always be cleared to 0.
Bits 4 to 0—Blink End Line Setting (BEL4 to BEL0): Bits 4 to 0 specify the end line of an area
made to blink. Set a value of [blink end line – 1].
The possible settings are 0 to 31 for 1/32 duty, 0 to 15 for 1/16 duty, and 0 to 7 for 1/8 duty.
Normal operation is not guaranteed if these ranges are exceeded.
13.2.11 Contrast Control Register (LRA)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
CCR3
CCR2
CCR1
CCR0
Initial value
⎯
⎯
⎯
⎯
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
W
W
W
W
LRA is an 8-bit write-only register that specifies the contrast control resistance value.
Upon reset, LRA is initialized to H'00.
Bits 7 to 4—Reserved Bits: Bits 7 to 4 are reserved; they should always be cleared to 0.
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13. Dot Matrix LCD Controller (H8/3857 Group)
Bits 3 to 0—Contrast Control Setting (CCR3 to CCR0): Bits 3 to 0 specify the value of the
contrast control resistance between the VLCD and V1 levels. By adjusting the contrast control
resistance between the VLCD and V1 levels, it is possible to adjust the contrast of the LCD panel.
The contrast control resistance can be set in the range from 0.1R to 1.6R, where R is the LCD
bleeder resistance.
Bit 3:
CCR3
Bit 2:
CCR2
Bit 1:
CCR1
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Bit 0:
CCR0
Contrast Control Resistance
0
1.6R
1
1.5R
0
1.4R
1
1.3R
0
1.2R
1
1.1R
0
1.0R
1
0.9R
0
0.8R
1
0.7R
0
0.6R
1
0.5R
0
0.4R
1
0.3R
0
0.2R
1
0.1R
(initial value)
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3
Operation
13.3.1
System Overview
The LCD controller operates at 1/32, 1/16, or 1/8 duty. The display size is a maximum of 40 × 32
dots (4 rows of 8 columns with a 5 × 8-dot font). As the LCD controller operates on the subclock
to perform display control, the time, etc., can be constantly displayed. As this module includes a
built-in 2X or 3X LCD power supply step-up circuit, an LCD system can be configured with just a
few external parts (resistors and capacitors). Also, since data in the display RAM is retained even
in module standby mode, and step-up operation is not performed, low power consumption can be
achieved without affecting the display.
H8/3857
RS
SEG1 to SEG64
R/W
CPU
STRB
LCD
controller
DB7
to DB0
COM1 to COM32
Figure 13.2 System Block Diagram
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LCD panel
13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.2
CPU Interface
The LCD controller's registers are not included in the memory map shown in figure 2.16 (a). They
are controlled from the CPU by means of chip-internal LCD pins DB7 to DB0, RS, R/W, and
STRB, via chip-internal I/O ports 9 and A. The pin configuration is shown in table 13.5, and an
example of the timing for access to registers in the LCD controller is shown in figure 13.3. For
information on port 9 and port A, see the descriptions in section 8, I/O Ports.
Table 13.5 Pin Configuration
Pin Name
Abbr.
I/O
Function
Data bus
pins
DB7 to DB0
I/O
When R/W = 0, these pins input data to be written to a register;
when R/W = 1, they output data read from a register
Register
selector pin
RS
Input
When R/S = 0, the index register is selected; when RS = 1, a
control register is selected
Read/write
select pin
R/W
Input
When R/W = 0, write access is selected; when R/W = 1, read
access is selected
Strobe pin
STRB
Input
At the fall of STRB, read or write access, as selected by R/W,
is performed on the register selected by RS
Writing to Index Register
When RS and R/W are both cleared to 0, data DB7 to DB0 is written to the index register (IR) at
the falling edge of STRB. Do not change RS or R/W at the fall of STRB.
Reading and Writing to Control Registers
To access a control register, data indicating the number of the register to be accessed must be
written to the index register (IR) before making the access. The register number data to be written
to IR is shown in table 13.2. As the register number written to IR is retained until IR is written to
again, if the same control register is accessed repeatedly, it is not necessary to write to IR each
time.
In a write to a control register, when RS has been set to 1 and R/W cleared to 0, data DB7 to DB0
is written to the control register specified by the index register (IR) at the falling edge of STRB.
Except for the display data register (LR4), control registers cannot be read. In a read of LR4, when
the LR4 register number is written to the index register (IR), and RS and R/W are both set to 1,
DB7 to DB0 are set to output mode, and the display memory data at the address specified by the
address register (LR2) is output from DB7 to DB0 at the rising edge of STRB. If a read is also
performed in the next cycle, the data output is held until the next rise of STRB, but if a write is
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13. Dot Matrix LCD Controller (H8/3857 Group)
performed in the next cycle, DB7 to DB0 are set to input mode from the point at which R/W is
cleared to 0, and the output is cleared.
In either case, do not change RS or R/W at the fall of STRB.
RS
R/W
STRB
DB7 to
DB0
Data
Data
Data
Data
Data
Data
Index
Data
Index
Data
Data
Data
register write register write register write register read register read register write
Figure 13.3 Example of Timing Sequence for 8-Bit Data Transfer
Notes on Use of Chip-Internal I/O Ports
For LCD controller interface internal ports 9 and A, port input/output is controlled by means of
PCR9 and PCRA in the same way as for ordinary I/O ports, and in output mode, the values set in
PDR9 or PDRA are output. Also, LCD controller internal pins RS, R/W, and STRB are input-only
pins, and DB7 to DB0 input/output is controlled by R/W. Therefore, the following points must be
noted.
1. After reset release and standby mode release
Since the chip's internal I/O ports go to the high-impedance state in a reset and in standby
mode, in initialization after reset or standby mode release, H'06 should be set in PDRA, and
H'07 in PCRA. This will set port A to output mode. If the PDRA setting were H'00, there
would be a possibility of the index register (IR) being written to.
2. Changing register read/write setting
When an LCD controller register is read (R/W = 1), DB7 to DB0 output data from the LCD
controller side, and so port 9 must be set to input mode. Therefore, H'00 must be written to
PCR9, setting port 9 to input mode, before changing the R/W setting from 0 to 1. When
writing data to an LCD controller register, first change R/W from 1 to 0, then write H'FF to
PCR9, setting port 9 to output mode.
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13. Dot Matrix LCD Controller (H8/3857 Group)
Examples of display data register (LR4) read/write access when read-modify-write is
designated are shown below.
[Set index register to display data register]
• Port A set to output mode, RMW set to 1
MOV.W
#H'0100,R1
MOV.W
#H'04FF,R0
MOV.B
R1L,@PDRA ............. Clear R/W to 0
MOV.B
R0H,@PDR9
MOV.B
R0L,@PCR9 ............. Output H'04 from port 9
MOV.B
R1H,@PDRA
MOV.B
R1L,@PDRA ............. Write H'04 to index register
[Read display data register]
MOV.B
R1L,@PCR9 ............. Set port 9 to input mode
MOV.W
#H'0706, R2
MOV.B
R2L,@PDRA ............. Set R/W to 1
MOV.B
R2H,@PDRA
MOV.B
@PDR9, R0H ............ Read PDR9 into general register
MOV.B
R2L,@PDRA
[Write to display data register]
MOV.W
#H'0504,R3
MOV.B
R3L,@PDRA ............. Clear R/W to 0
NOT.B
R0H
MOV.B
R0H,@PDR9
MOV.B
R0L,@PCR9 ............. Set port 9 to output mode
MOV.B
R3H,@PDRA
MOV.B
R3L @PDRA ............. Write data to display data register
............. Invert general register data
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.3
LCD Drive Pin Functions
Common/Segment Output Switching
Among the LCD controller's LCD drive outputs, COM9 to COM32 and SEG64 to SEG41 are
switched according to the display duty and display mode.
The display duty is set by control register 1 (LR0) bits DDTY1 and DDTY0, and the display mode
by bit SOB.
(1) When SOB = 0 (character display mode)
• 1/8 duty (DDTY1 = 1)
Common outputs:
COM1 to COM8
Segment outputs:
SEG1 to SEG40
Note: COM9/SEG64 to COM16/SEG57 output common signal non-selection waveforms,
COM17/SEG56 to COM24/SEG49 output the same waveforms as COM1 to COM8, and
COM25/SEG48 to COM32/SEG41 output common signal non-selection waveforms.
• 1/16 duty (DDTY1 = 0, DDTY0 = 1)
Common outputs:
COM1 to COM16
Segment outputs:
SEG1 to SEG40
Note: COM17/SEG56 to COM32/SEG41 output the same waveforms as COM1 to COM16.
• 1/32 duty (DDTY1 = 0, DDTY0 = 0)
Common outputs:
COM1 to COM32
Segment outputs:
SEG1 to SEG40
(2) When SOB = 1 (graphic display mode)
• 1/8 duty (DDTY1 = 1)
Common outputs:
COM1 to COM8
Segment outputs:
SEG1 to SEG64
• 1/16 duty (DDTY1 = 0, DDTY0 = 1)
Common outputs:
COM1 to COM16
Segment outputs:
SEG1 to SEG56
• 1/32 duty (DDTY1 = 0, DDTY0 = 0)
Common outputs:
COM1 to COM32
Segment outputs:
SEG1 to SEG40
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13. Dot Matrix LCD Controller (H8/3857 Group)
Table 13.6 Pin Functions According to Display Mode and Display Duty
Function
SOB = 0 (Character Display Mode)
Pin Name
1/8 Duty
COM1 to COM8
COM1 to COM8 COM1 to
COM16
COM9/SEG64 to
COM16/SEG57
Common signal
non-selection
waveform
SEG1 to SEG40
SEG1 to SEG40 SEG1 to
SEG40
COM32/SEG41 to Common signal
COM25/SEG48
non-selection
waveform
1/16 Duty 1/32 Duty
COM1 to
COM16
SOB = 1 (Graphic Display Mode)
1/8 Duty
1/16 Duty 1/32 Duty
COM1 to
COM8
COM1 to
COM16
COM1 to
COM16
SEG1 to
SEG56
SEG1 to
SEG40
SEG64 to
SEG57
SEG1 to
SEG40
COM16 to COM32 to
COM1
COM17
SEG1 to
SEG56
COM32 to
COM17
COM24/SEG49 to COM8 to COM1
COM17/SEG56
13.3.4
Display Memory Configuration and Display
The LCD controller includes 64 × 32-bit bit-mapped display memory. As the display memory
configuration, a 5-bit × 8 or 8-bit × n (n = 5, 7, or 8) X-direction combination can be selected,
while the Y-direction configuration is 32 bits. Display data written from the CPU is stored
horizontally with the MSB at the left and the LSB at the right, as shown in figure 13.4. On the
display, 1 data corresponds to illumination (black), and 0 data to non-illumination (colorless).
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13. Dot Matrix LCD Controller (H8/3857 Group)
COM1
COM2
LCD
SEG1
SEG3
SEG2
SEG5
SEG4
SEG40
Y address
H'00
0
1
0
1
H'01
1
0
1
0
DB7
(MSB)
0
1
DB0
(LSB)
Display memory
(1) SOB = 0
COM1
COM2
LCD
SEG1 SEG3 SEG5 SEG7
SEG40,
SEG56,
SEG64
SEG2 SEG4 SEG6 SEG8
Y address
H'00
1
0
1
0
1
0
1
H'01
0
1
0
1
0
1
0
DB7
(MSB)
0
1
DB0
(LSB)
Display memory
(2) SOB = 1
Figure 13.4 Memory Data and Display
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.5
Display Data Output
The LCD controller has a character display mode (SOB = 0) in which only 5 bits of each display
data byte can be output to perform efficient 5-dot × 8-dot character output, and a graphic display
mode (SOB = 1) in which all the bits of a data byte can be output to perform efficient full-dot
graphic display. The relationship between the display duty and output pins in each mode is shown
in figure 13.5.
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13. Dot Matrix LCD Controller (H8/3857 Group)
(1) Character display mode (SOB = 0)
• 1/8 duty Display dots: 320
H'05
H'06
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
X address
H'00
H'07
Y address
H'00
H'07
H'08
H'0F
H'10
SEG36
SEG37
SEG38
SEG39
SEG40
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
SEG24
SEG25
SEG1
SEG2
SEG3
SEG4
SEG5
H'1F
• 1/16 duty Display dots: 640
H'05
H'06
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
X address
H'00
H'07
Y address
H'00
H'07
H'08
H'0F
H'10
Valid display data area
Figure 13.5 Display Duty and Valid Display Data Area (1)
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COM2
COM1
SEG36
SEG37
SEG38
SEG39
SEG40
COM16
COM15
SEG24
SEG25
SEG1
SEG2
SEG3
SEG4
SEG5
H'1F
13. Dot Matrix LCD Controller (H8/3857 Group)
• 1/32 duty Display dots: 1280
X address
H'00
H'05
H'06
H'07
Y address
H'00
H'07
H'08
H'0F
H'10
SEG36
SEG37
SEG38
SEG39
SEG40
COM32
COM31
H'06
H'07
COM2
COM1
SEG31
SEG32
SEG33
SEG34
SEG35
SEG26
SEG27
SEG28
SEG29
SEG30
SEG24
SEG25
SEG1
SEG2
SEG3
SEG4
SEG5
H'1F
(2) Graphic display mode (SOB = 1)
• 1/8 duty Display dots: 512
X address
H'00
H'05
H'07
H'08
H'0F
H'10
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
SEG50
SEG51
SEG52
SEG53
SEG54
SEG55
SEG56
SEG57
SEG58
SEG59
SEG60
SEG61
SEG62
SEG63
SEG64
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
H'1F
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
Y address
H'00
Valid display data area
Figure 13.5 Display Duty and Valid Display Data Area (2)
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SEG39
SEG40
COM32
COM31
COM30
COM29
COM28
COM27
COM26
COM25
COM24
COM23
COM22
COM21
COM20
COM19
COM18
COM17
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
Y address
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
SEG50
SEG51
SEG52
SEG53
SEG54
SEG55
SEG56
COM16
COM15
COM14
COM13
COM12
COM11
COM10
COM9
COM8
COM7
COM6
COM5
COM4
COM3
COM2
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
Y address
13. Dot Matrix LCD Controller (H8/3857 Group)
• 1/16 duty Display dots: 896
H'00
X address
H'00
H'05
H'00
H'05
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H'06
H'06
H'07
H'07
H'08
H'0F
H'10
H'1F
• 1/32 duty Display dots: 1280
X address
H'00
H'07
H'07
H'08
H'0F
H'10
H'1F
Valid display data area
Figure 13.5 Display Duty and Valid Display Data Area (3)
13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.6
Register and Display Memory Access
Register Access
To access a register, RS is first cleared to 0 and the register number of the register to be accessed
is set in the index register. Then RS is set to 1, enabling the specified register to be accessed.
Some internal registers have nonexistent bits; 0 must be written to these bits. The display data
register (LR4) is the only register that can be read.
Display Memory Access
To access the display memory, the address to be accessed is set in the address register (LR2). The
memory is then accessed via the display data register (LR4). This access can be performed without
awareness of the display-side read. See figure 13.6 for the procedure.
After the respective display data register (LR4) accesses, the X and Y addresses are automatically
incremented on the basis of the value set in the INC bit in control register 2 (LR1), and therefore
address settings need not be made each time.
With 1/32 duty (DDTY1 = 0, DDTY0 = 0) in graphic display mode (SOB = 1), if INC = 0 the X
address remains the same in each read/write access to the display data register (LR4), while the Y
address is automatically incremented up to H'1F. After reaching H'1F, the Y address returns to
H'00 again, and the X address is simultaneously incremented. If INC = 1, on the other hand, the Y
address remains the same in each read/write access to the display data register (LR4), while the X
address is automatically incremented up to H'4. After reaching H'4, the X address returns to H'0
again, and the Y address is simultaneously incremented. In this way, consecutive read/write
accesses can be made to the entire display memory area.
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13. Dot Matrix LCD Controller (H8/3857 Group)
X addres
H'0
H'1
H'4
Y address
H'00
H'01
H'1F
(1) Priority given to Y-direction data access (INC = 0)
X address
H'0
H'1
H'4
Y address
H'00
H'01
H'1F
(2) Priority given to X-direction data access (INC = 1)
Notes: 1. Address register (LR2) bits XA2 to XA0 show the X address, and bits YA4 to YA0 show the Y address.
2. X address operation
(1) SOB = 0: Address becomes H'0 after H'7, regardless of the display duty.
(2) SOB = 1: Address becomes H'0 after H'6 when 1/16 duty is set, and after H'7 when 1/8 duty is set.
3. Y address operation
Address becomes H'00 after H'0F when 1/16 duty is set, and after H'07 when 1/8 duty is set.
Figure 13.6 Display Memory Access Methods (SOB = 1, 1/32 Duty)
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13. Dot Matrix LCD Controller (H8/3857 Group)
Reading for Display
The LCD controller's display RAM is of the dual-port type, with accesses from the CPU and reads
for LCD display independent of each other. This allows flexible interfacing.
RS
R/W
STRB
Input data
H'02
[n, m]
H'04
data
[n, m]
Output data
Address
[*,*]
[n, m]
data
[n, m+1]
[n, m+1]
[n, m+2]
Figure 13.7 Memory Read Procedure
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13. Dot Matrix LCD Controller (H8/3857 Group)
Read-Modify-Write Mode
In the normal state, the X or Y address is incremented after both read and write accesses to the
display memory. In read-modify-write mode, the address is incremented only after a write, and
remains the same after a read. By using this mode, it is possible to read previously written data,
process that data, and then write it back to the same address.
START
Set address
Read data
Write data
(Address) + 1
No
End of modification?
Yes
END
Figure 13.8 Read-Modify-Write Mode Flowchart
13.3.7
Scroll Function
The LCD controller allows vertical scrolling of any number of lines to be performed by specifying
the display start line. Figure 13.9 shows the relationship between the display memory and Y
address, and the display memory and LCD display after scrolling, for 1/16 duty and 1/8 duty
settings. If the display start address is set to H'01, the data at Y address H'00 is displayed in the
16th line. Therefore, when the display is scrolled in order to show the next screen, the data at Y
address H'00 must be rewritten with the next display data. This data update should be carried out
after the display is scrolled.
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13. Dot Matrix LCD Controller (H8/3857 Group)
Display start line = 0
Y address
Y address
H' 00
H' 01
H' 02
H' 03
H' 04
H' 05
H' 06
H' 07
H' 08
H' 09
H' 0A
H' 0B
H' 0C
H' 0D
H' 0E
H' 0F
H' 00
H' 01
H' 02
H' 03
H' 04
H' 05
H' 06
H' 07
Display start line = 1
Y address
Y address
H' 01
H' 02
H' 03
H' 04
H' 05
H' 06
H' 07
H' 08
H' 09
H' 0A
H' 0B
H' 0C
H' 0D
H' 0E
H' 0F
H' 00
H' 01
H' 02
H' 03
H' 04
H' 05
H' 06
H' 07
H' 00
Display start line = 2
Y address
Y address
H' 02
H' 03
H' 04
H' 05
H' 06
H' 07
H' 08
H' 09
H' 0A
H' 0B
H' 0C
H' 0D
H' 0E
H' 0F
H' 00
H' 01
H' 02
H' 03
H' 04
H' 05
H' 06
H' 07
H' 00
H' 01
(1) 1/16 duty
(2) 1/8 duty
Note: The Y address comprises bits YA4 to YA0 in the address register (LR2).
Figure 13.9 Vertical Scrolling
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.8
Blink Function
Dot Matrix Display Blinking
The LCD controller can perform blinking display in any area. With an 80 Hz frame frequency, the
display goes on and off in a cycle of approximately 1.6 seconds.
To set a blink area, in the horizontal direction the line unit is specified by means of the blink start
line register (LR8) and blink end line register (LR9), while in the vertical direction a 5-bit unit
(SOB = 0) or 8-bit unit (SOB = 1) is set in the blink register (LR6). When 1 is set in the blink
register (LR6), blinking of the corresponding dot is controlled. After making these register
settings, blinking is started by setting the BLK bit in control register 2 (LR1) to 1. As the blink
area is designated by an absolute specification with respect to the display memory, if the display is
scrolled the blink area also shifts accordingly.
LCD
Blink start line
register (LR8)
Blink end line
register (LR9)
SOB = 0
SEG1
SOB = 1
SEG1 SEG9
Blink register (LR6)
1
SEG6
1
1
SEG11 SEG16 SEG21 SEG26 SEG31 SEG36
SEG17 SEG25 SEG33 SEG41 SEG49 SEG57
0
DB0
(LSB)
0
1
1
0
DB7
(MSB)
Figure 13.10 Blink Register (LR6) and Blink Locations
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Blink area
13. Dot Matrix LCD Controller (H8/3857 Group)
Display start line = H'0
Blink start line
= H'0
Blink end line
= H'7
Display start line = H'4
Blink start line
= H'4
Blink end line
= H'7
Figure 13.11 Blinking during Display Scrolling (SOB = 0, 1/16 Duty)
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.9
Module Standby Mode
The LCD controller has a module standby function that enables low power consumption to be
achieved. In module standby mode, the built-in step-up circuit and op-amps are halted, and
segment and common outputs go to the VSS (display-off state) level. Display RAM and internal
register data is retained, except for the DISP and OPON bits in control register 2 (LR1). The
control registers can still be accessed in the module standby state. Figure 13.12 shows the
procedures for initiating and clearing module standby mode. The initiation and clearing
procedures must be followed exactly in order to protect the display memory contents.
When the CPU is placed in standby mode, set the LSBY bit in control register 1 (LR0) to 1 before
executing the standby instruction. After clearing standby mode, follow the module standby
clearing procedure to start display.
Initiation
Set LSBY to 1
Internal operation halts
Step-up operation halts
Module standby mode initiated
Clearing
Clear LSBY to 0
Internal operation starts
Step-up operation starts
Wait for step-up circuit power
supply to stabilize
Set OPON to 1
Wait for op-amps to stabilize
Set DISP to 1
Display starts
Figure 13.12 Module Standby Mode and Standby Mode Initiation and Clearing Procedures
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.10 Power-On and Power-Off Procedures
As the LCD controller incorporates a complete power supply circuit, the procedures shown in
figure 13.13 must be followed when powering on and off. Failure to follow these procedures may
result in an abnormal display.
Starting
display
Set PWR and OPON* to 1
Set SOB, DDTY1, and DDTY0
according to mode used
Step-up operation starts
Note: * When the built-in step-up circuit is used,
wait for the step-up circuit power supply to
stabilize before making this setting.
Do not make this setting when using an
external power supply.
Write data
Set DISP to 1
Halting
display
Clear DISP to 0
Step-up operation halts
Clear PWR and OPON to 0
Figure 13.13 Power-On and Power-Off Procedures
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.11 Power Supply Circuit
The LCD controller has a built-in 2X or 3X step-up circuit for LCD drive. In standby mode, the
power supply circuit is automatically turned off after a maximum of two subclock cycles, and the
power consumption of the step-up circuit falls to zero. The power supply circuit can be turned on
and off by a command, and an external power supply circuit should be used if the current capacity
of the built-in step-up circuit is insufficient.
Step-Up Circuit
By inputting the reference voltage to Vci (Vci ≤ VCC), connecting a capacitor between VSS and
VLOUT, C1+ and C1–, and C2+ and C2–, and setting the PWR bit in control register 1 (LR0) to
1, the potential between Vci and VCC is stepped up by a factor of 2 or 3. See figures 13.17 (1) and
(2) for the method of connecting the capacitors. As the subclock is used for voltage step-up, stepup will not be performed unless the subclock is supplied. Since V ci is also used for the step-up
circuit power supply, an adequate current must be assured.
Step-up cannot be performed below VCC. Apply a V ci voltage that gives a VLOUT level between
VCC and 7.0 V.
If the step-up circuit is not used, connect V ci to VCC.
LCD Drive Level Power Supply
Six power supply levels⎯V1, V2, V3, V3, V4, V5, and VSS⎯are necessary for LCD drive. The
V1 to VSS power supplies are normally generated by means of resistive division. The power supply
circuit includes a voltage follower op-amp for each voltage level generated by resistive division.
When 1/4 bias is used for LCD display, the V3 and V4 pins should be shorted; when 1/5 bias is
used, the V3 and V4 pins should be left open. The V34 pin is an internal resistance test pin, and
should always be shorted to the V3 pin externally.
Contrast Control
The LCD controller provides for the following two methods of contrast control.
• Using built-in contrast control circuit
The LCD controller includes a programmable contrast control circuit. The LCD power supply
voltage can be adjusted on the basis of a given step-up circuit voltage by making a selection in
the contrast control register (LRA).
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13. Dot Matrix LCD Controller (H8/3857 Group)
• By changing step-up circuit reference voltage Vci
The step-up circuit voltage level can be varied by changing step-up circuit reference voltage
Vci.
External Power Supply
• When an external power supply is input to VLCD
V1 to V5 can be generated by inputting an external power supply to VLCD, and using the built-in
op-amps by setting the OPON bit in control register 2 (LR1) to 1. The VLCD input level must be
between VCC and 7.0 V.
• When external power supply is input directly to V1 to V5
A power supply can be applied directly to V1, V2, V3, V4, and V5 from an external source by
clearing the PWR bit in control register 1 (LR0) and the OPON bit in control register 2 (LR1)
to 0, to halt the built-in step-up circuit and cut the built-in op-amp power supply. The same
potential as V1 should be input to VLCD. Apply a voltage not exceeding VLCD to V2 through V5.
The input level of VLCD and V1 must be between VCC and 7.0 V.
In either case, inputting a voltage exceeding the maximum rated voltage may adversely affect the
reliability of the chip.
13.3.12 LCD Drive Power Supply Voltages
There are six LCD drive power supply voltage values⎯V1 to V5, and VSS. V1 is the highest
voltage, and VSS the lowest. As shown in figure 13.14, the common waveforms are formed from a
combination of V1, V2, V5, and VSS, while the segment waveforms are formed from a
combination of V1, V3, V4, and VSS. V1 and VSS are shared by both common and segment
waveforms, but the intermediate voltages are different.
In figure 13.14, the waveforms of outputs SEG1 to SEG40 differ according to the display data. In
this example, LCD panel lines for which COM1 is connected are illuminated, and all other dots
are not illuminated.
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13. Dot Matrix LCD Controller (H8/3857 Group)
1 frame
Line selection
period
V1
V2
V3
COM1
V4
V5
VSS
V1
V2
COM2 V3
V4
V5
VSS
V1
V2
V3
COM32
V4
V5
VSS
SEG1
V1
V2
V3
V4
V5
VSS
V1
V2
V3
SEG40 V4
V5
VSS
Not selected
Selected
Figure 13.14 LCD Drive Power Supply Waveforms (1/32 Duty)
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.13 LCD Voltage Generation Circuit
When Using External Power Supply and Built-In Op-Amps
When the built-in step-up circuit is not used, and the LCD drive voltages are supplied directly
from an external power supply, connections should be made as shown in figure 13.15. The VLCD
input level must be between VCC and 7.0 V.
The LCD controller includes bleeder resistances that generate levels V1 to V5, and voltage
follower op-amp circuits. Set the OPON bit in control register 2 (LR1) to 1. Contrast can be
controlled by software, using the contrast control register (LRA).
If the capacitance of the LCD panel to be driven is large, capacitors of around 0.1 to 0.5 μ F
should be inserted between the V1OUT to V5OUT built-in op-amp outputs and VSS to provide
stabilization. In order for the op-amps to operate normally, the contrast control register (LRA)
should be set so that the potential difference between VLCD and V1, and between V5 and VSS, is at
least 0.4 V.
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13. Dot Matrix LCD Controller (H8/3857 Group)
VLCD
VLCD
OPON = 1
VR
V1OUT
R
V2OUT
R
V1
V2
SEG1 to SEG40
V3
V3OUT
V3
Rt
V34
Control
circuit
R
V4
0.1 to 0.5 μF
+
+
+
+
+
V4OUT
R
V5OUT
R
VSS
V4
COM1 to COM8
V5
ON
VSS
Vci
VCC
COM32/SEG41
to COM9/SEG64
PWR = 0
C1+
C1–
C2+
Step-up
circuit
C2–
VLOUT
VSS
Note: Rt is a test resistance. The V3 and V34 pins should be shorted.
Figure 13.15 Example of Connections when Using Built-In Op-Amps and External LCD
Power Supply (1/5 Bias)
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13. Dot Matrix LCD Controller (H8/3857 Group)
When Using External Power Supply but Not Using Built-In Op-Amps
When the built-in step-up circuit and op-amps are not used, and the LCD drive voltages are
supplied directly from an external power supply, connections should be made as shown in figure
13.16.
As the built-in step-up circuit and op-amps are not used, the OPON bit in control register 2 (LR1)
should be cleared to 0.
VLCD
OPON = 0
VR
V1
V2
V1OUT
R
V2OUT
R
V1
V2
SEG1 to SEG40
V3
V3OUT
V3
V3
Rt
V34
Control
circuit
R
V4
V4
V5
V4OUT
R
V5OUT
R
VSS
V4
COM1 to COM8
V5
OFF
VSS
Vci
VCC
COM32/SEG41
to COM9/SEG64
PWR = 0
C1+
C1–
C2+
Step-up
circuit
C2–
VLOUT
VSS
Notes: 1. Rt is a test resistance. The V3 and V34 pins should be shorted.
2. Set VCC ≤ VLCD = V1 ≤ 7.0 V, and VLCD ≥ Vn ≥ VSS (n = 2, 3, 4, or 5).
Figure 13.16 Example of Connections when Not Using Built-In Op-Amps and Using
External LCD Power Supply (1/5 Bias)
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13. Dot Matrix LCD Controller (H8/3857 Group)
When Using Built-In Step-Up Circuit and Op-Amps
When the built-in step-up circuit is used, connections should be made as shown in figure 13.17 (1)
(3X step-up) or figure 13.17 (2) (2X step-up).
The LCD controller includes bleeder resistances that generate levels V1 to V5, and voltage
follower op-amp circuits. When the built-in op-amps are used, the OPON bit in control register 2
(LR1) should be set to 1. Contrast can be controlled by software, using the contrast control register
(LRA).
If the capacitance of the LCD panel to be driven is large, capacitors of around 0.1 to 0.5 μF should
be inserted between the V1OUT to V5OUT built-in op-amp outputs and VSS to provide
stabilization. In order for the op-amps to operate normally, the contrast control register (LRA)
should be set so that the potential difference between VLCD and V1, and between V5 and VSS, is at
least 0.4 V.
Since the Vci pin is also used for the step-up circuit power supply, ensure that an adequate current
can be supplied when carrying out reference voltage adjustment. The Vci input level must not
exceed VCC.
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13. Dot Matrix LCD Controller (H8/3857 Group)
VLCD
OPON = 1
VR
V1OUT
R
V2OUT
R
V1
V2
SEG1 to SEG40
V3
V3OUT
V3
Rt
V34
Control
circuit
R
V4
0.1 to 0.5 μF
+
+
+
+
+
V4OUT
R
V5OUT
R
VSS
V4
COM1 to COM8
V5
ON
VSS
Vci
Vci
0.47 to 1 μF
0.47 to 1 μF
+
COM32/SEG41
to COM9/SEG64
PWR = 1
C1+
C1–
+
C2+
Step-up
circuit
C2–
VLOUT
0.47 to 1 μF
+
VSS
Notes: 1. Rt is a test resistance. The V3 and V34 pins should be shorted.
2. The output voltage after step-up should not be lower than VCC and should not
exceed 7.0 V. With 3X step-up, in particular, do not input a voltage of 2.3 V or
3. above as the reference voltage (Vci).
Vci is also used for the step-up circuit power supply. Use a transistor, etc., for
4. current amplification to ensure an adequate LCD drive current.
5. The Vci input level must not exceed VCC.
Care is required with connection when using capacitors with polarity.
Figure 13.17 Example of Connections when Using Built-In Step-Up Circuit (1)
(3X Step-Up, 1/5 Bias)
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13. Dot Matrix LCD Controller (H8/3857 Group)
VLCD
OPON = 1
VR
V1OUT
R
V2OUT
R
V1
V2
SEG1 to SEG40
V3
V3OUT
V3
Rt
V34
Control
circuit
R
V4
0.1 to 0.5 μF
+
+
+
+
+
V4OUT
R
V5OUT
R
VSS
V4
COM1 to COM8
V5
ON
VSS
Vci
Vci
COM32/SEG41
to COM9/SEG64
PWR = 1
C1+
0.47 to 1 μF
C1–
+
C2+
Step-up
circuit
C2–
VLOUT
0.47 to 1 μF
+
VSS
Notes: 1.
2.
3.
4.
5.
Rt is a test resistance. The V3, V34, and V4 pins should be shorted.
The output voltage after step-up should not be lower than VCC and should
not exceed 7.0 V.
Vci is also used for the step-up circuit power supply. Use a transistor, etc.,
for current amplification to ensure an adequate LCD drive current.
The Vci input level must not exceed VCC.
Care is required with connection when using capacitors with polarity.
Figure 13.17 Example of Connections when Using Built-In Step-Up Circuit (2)
(2X Step-Up, 1/4 Bias)
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13. Dot Matrix LCD Controller (H8/3857 Group)
When Using Built-In Step-Up Circuit and Bleeder Resistances
If the drive capability of the built-in op-amps is insufficient for the size of the LCD panel, the V1
to V5 levels can be supplied from external bleeder resistances. In this case, clear the OPON bit in
control register 2 (LR1) to 0 to turn the op-amps off. The built-in contrast control circuit cannot be
used, so contrast control must be handled by an external circuit.
A 1/4 or 1/5 bias value can be set, according to the method of connecting the external bleeder
resistances. Figure 13.18 shows an example of the connections for 1/5 bias drive.
The 2X or 3X step-up circuit can be used.
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13. Dot Matrix LCD Controller (H8/3857 Group)
VLCD
OPON = 0
VR
V1
V1OUT
V2
R
V2OUT
SEG1 to SEG40
V3
R
V3OUT
V3
Rt
V34
R
Control
circuit
V4
COM32/SEG41
to COM9/SEG64
V4
V4OUT
COM1 to COM8
V5
R
V5OUT
R
VSS
OFF
VSS
Vci
Vci
0.47 to 1 μF
0.47 to 1 μF
PWR = 1
C1+
+
C1–
C2+
+
Step-up
circuit
C2–
VLOUT
0.47 to 1 μF
+
VSS
Notes: 1. Rt is a test resistance. The V3 and V34 pins should be shorted.
2. A value of around 5 kΩ to 25 kΩ is recommended for external power supply division resistance R.
3. For contrast control, either insert a variable resistance between VLCD and V1, or adjust step-up
circuit reference voltage Vci. The built-in contrast control circuit cannot be used.
4. The output voltage after step-up should not be lower than VCC and should not exceed 7.0 V.
With 3X step-up, in particular, do not input a voltage of 2.3 V or above as the reference voltage
(Vci).
5. Vci is also used for the step-up circuit power supply. Use a transistor, etc., for current amplification
to ensure an adequate LCD drive current.
6. The Vci input level must not exceed VCC.
7. Care is required with connection when using capacitors with polarity.
8. Set V1OUT ≤ VLCD.
Figure 13.18 Example of Connections when Using 3X Step-Up Circuit and External Bleeder
Resistances (1/5 Bias)
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13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.14 Contrast Control Circuit
Contrast control can be performed by software (electronic control function) by controlling the
LCD drive voltage (the potential difference between VLCD and V1) by means of the contrast control
register (LRA). Variable resistance value VR can be adjusted within the range of 0.1 R to 1.6 R,
where R is the value of the basic dividing bleeder resistance between VLCD and V1. The contrast
control settings by bits CCR3 to CCR0 in the contrast control register (LRA) are shown in table
13.7.
To ensure stable operation of the voltage follower op-amp circuits that output levels V1 to V5, the
contrast control register (LRA) should be set so that the potential difference between VLCD and V1,
and between V5 and VSS, is at least 0.4 V. The contrast control ranges are shown in table 13.8.
If contrast control cannot be adequately performed by means of on-chip resistance VR, control can
be performed by inserting a resistance between VLOUT and VLCD.
Table 13.7 Contrast Control Settings
Contrast Control Register (LRA) Variable Resistance
CCR3
CCR2
CCR1
CCR0
Value (VR)
V1−VSS Potential
Difference
Display Color
0
0
0
0
1.6R
Small
Light
1
1.5R
Large
Dark
1
1
0
1
1
0
0
1
1
0
1
0
1.4R
1
1.3R
0
1.2R
1
1.1R
0
1.0R
1
0.9R
0
0.8R
1
0.7R
0
0.6R
1
0.5R
0
0.4R
1
0.3R
0
0.2R
1
0.1R
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13. Dot Matrix LCD Controller (H8/3857 Group)
Table 13.8 Contrast Control Ranges
Bias
LCD Drive Voltage: VDR
Contrast Control Range
• LCD drive voltage
adjustment range:
1/5 bias
drive
5×R
× (VLCD – VSS)
5 × R + VR
• V5−VSS potential
difference limit:
0.758 × (VLCD – VSS) ≤ VDR ≤ 0.980 × (VLCD – VSS)
R
× (VLCD – VSS) ≥ 0.4 [V]
5 × R + VR
VR
• VLCD−V1 potential
× (VLCD – VSS) ≥ 0.4 [V]
difference limit:
5 × R + VR
• LCD drive voltage
adjustment range:
1/4 bias
drive
4×R
× (VLCD – VSS)
4 × R + VR
• V5−VSS potential
difference limit:
0.714 × (VLCD – VSS) ≤ VDR ≤ 0.976 × (VLCD – VSS)
R
× (VLCD – VSS) ≥ 0.4 [V]
4 × R + VR
VR
• VLCD−V1 potential
× (VLCD – VSS) ≥ 0.4 [V]
difference limit:
4 × R + VR
13.3.15 LCD Drive Bias Selection Circuit
The ideal bias value that gives the best contrast is calculated using the equation shown below. If
drive is performed at a bias value lower than the optimum, contrast will deteriorate, but the LCD
drive voltage (the potential difference between V1 and VSS) can be kept low. If the LCD drive
voltage is inadequate even with a low Vci voltage and use of the 3X step-up circuit, or if the output
voltage falls and the LCD display becomes faint as batteries wear out, for instance, the display can
be made clearer by decreasing the LCD drive bias.
Optimum bias value for 1/N duty drive =
1
N+1
Notes: 1. When using 1/5 bias, leave the V3 and V4 pins open.
2. When using 1/4 bias, short the V3 and V4 pins.
3. The V3 and V34 pins must always be shorted.
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14. Dot Matrix LCD Controller (H8/3854 Group)
Section 14 Dot Matrix LCD Controller
(H8/3854 Group)
14.1
Overview
The LCD controller has built-in display RAM, and performs dot matrix LCD display. One bit of
display RAM data corresponds to illumination or non-illumination of one dot on the LCD panel,
making possible displays with an extremely high degree of freedom.
The LCD controller incorporates all the functions required for LCD display, allowing a dot matrix
display of up to 40 × 16 dots.
I/O ports are used for the interface with the CPU, offering excellent software heritability when
using a combination of MPU and LCD driver.
This module operates on the subclock, making it ideal for use in small portable devices.
14.1.1
Features
• Built-in bit-mapped display RAM (640 bits)
Maximum of 640 display bits (selectable from 40 × 16 bits or 40 × 8 bits)
• Choice of 1/8 or 1/16 duty
• Low power consumption enabling extended drive on battery power
Subclock operation
Module standby
• Comprehensive display control functions
Display data read/write, display on/off control, read-modify-write
• CPU interface
I/O port interface
• Built-in LCD power supply bleeder resistance circuit
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.1.2
Block Diagram
Figure 14.1 shows a block diagram of the LCD controller.
SEG40
SEG1
COM9
COM1
COM16
COM8
Common driver
Segment driver
Common
counter
Decoder
Latch 2
Display
line counter
MPX
40 × 16-bit display
memory
Y decoder
Latch 1
Address
register
X decoder
Display data register
Control
register 1/2
Index
register
Frame frequency
setting register
LCD drive level power supply
selection circuit
V5OUT
V3OUT
V1OUT
V4OUT
V2OUT
CPU interface
RS
STRB
DB6
DB4
DB2
DB0
R/W
DB7
DB5
DB3
DB1
Figure 14.1 Block Diagram of LCD Controller
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.1.3
Pin Configuration
Table 14.1 shows the pins assigned to the LCD controller.
Table 14.1 Pin Configuration
Pin Name
Abbr.
I/O
Common output pins
COM1 to COM16
Output LCD common drive pins
Segment output pins
SEG1 to SEG40
Output LCD segment drive pins
LCD drive power supply
level
V1OUT to V5OUT I/O
14.1.4
Function
LCD drive power supply level input/output
pins
Register Configuration
The LCD controller has one index register and five control registers, all of which are accessed via
an I/O port interface. Except for the display data register (LR4), these registers cannot be read.
The LCD controller register configuration is shown in table 14.2.
Table 14.2 Register Configuration
Index Register
Name
Abbr.
R/W
RS
IR2
IR1
IR0
Index register
IR
W
0
⎯
⎯
⎯
Control register 1
LR0
W
1
0
0
0
Control register 2
LR1
W
Address register
LR2
W
Frame frequency setting register
LR3
W
Display data register
LR4
R/W
1
1
0
1
1
0
0
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.2
Register Descriptions
14.2.1
Index Register (IR)
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
IR2
IR1
IR0
Initial value
⎯
⎯
⎯
⎯
⎯
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
W
W
W
Bit
IR is an 8-bit write-only register that selects one of the LCD controller's five control registers. IR
is selected when RS is 0.
Upon reset, IR is initialized to H'00.
Bits 7 to 3—Reserved Bits: Bits 7 to 3 are reserved; they should always be cleared to 0.
Bits 2 to 0—Index Register (IR2 to IR0): Bits 2 to 0 are used to select one of the LCD
controller's five control registers. The correspondence between the settings of IR2 to IR0 and the
selected registers is shown in table 14.2. Other settings are invalid.
14.2.2
Control Register 1 (LR0)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
LSBY
⎯
⎯
⎯
DDTY1
⎯
Initial value
⎯
⎯
0
⎯
⎯
⎯
0
⎯
Read/Write
⎯
⎯
W
⎯
⎯
⎯
W
⎯
LR0 is an 8-bit write-only register that performs LCD module standby mode setting and drive duty
selection.
Upon reset, LR0 is initialized to H'00.
Bits 7 and 6—Reserved Bits: Bits 7 and 6 are reserved; they should always be cleared to 0.
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Bit 5—Module Standby (LSBY): Bit 5 is the module standby setting bit. When LSBY is set to 1,
the LCD controller enters standby mode. At this time, bits DISP, LPS1, and LPS0 in LR1 are
reset.
Bit 5: LSBY Description
0
LCD controller operates normally
(initial value)
1
Power supply to built-in bleeder resistances halts, display is turned off, and LCD
controller enters standby mode
Bits 4 to 2—Reserved Bits: Bits 4 to 2 are reserved; they should always be cleared to 0.
Bit 1—Display Duty Select (DDTY1): Bit 1 selects a display duty of 1/16 or 1/8.
Bit 1: DDTY1 Description
0
1/16 duty selected
1
1/8 duty selected
(initial value)
Y address H'8 to H'F display data is invalid
Bit 0—Reserved Bit: Bit 0 is reserved; it should always be cleared to 0.
14.2.3
Control Register 2 (LR1)
Bit
7
6
5
4
3
2
1
0
⎯
DISP
LPS1
LPS0
RMW
⎯
INC
⎯
Initial value
⎯
0
0
0
0
⎯
0
⎯
Read/Write
⎯
W
W
W
W
⎯
W
⎯
LR1 is an 8-bit write-only register that selects operation or halting of LCD display and supply or
halting of current to the built-in bleeder resistances, performs read-modify-write mode setting, and
selects the address to be incremented in the display memory.
Upon reset, LR1 is initialized to H'00.
Bit 7—Reserved Bit: Bit 7 is reserved; it should always be cleared to 0.
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Bit 6—LCD Operation Setting (DISP): Bit 6 selects operation or halting of the LCD display.
When the LSBY bit in LR0 is set to 1, DISP is cleared.
Bit 6: DISP
Description
0
LCD is turned off. All LCD outputs go to the VSS level
1
LCD is turned on
(initial value)
Bits 5 and 4—LCD Power Supply Setting (LPS1, LPS0): Bits 5 and 4 specify use or non-use of
the internal power supply as the LCD drive power supply, and of the built-in LCD power supply
bleeder resistances. When LPS1 is set to 1, the internal power supply is connected to the bleeder
resistances. When LPS0 is set to 1, a power supply divided by the built-in bleeder resistances is
supplied. When the LCD drive power supply level is applied to V1OUT through V5OUT from an
external source, LPS1 and LPS0 must be cleared to 0.
When the LSBY bit in LR0 is set, LPS1 and LPS0 are cleared.
Bit 5: LPS1
Description
0
Power supply to V1OUT is halted
1
Power supply voltage is supplied to V1OUT
Bit 4: LPS0
Description
0
Built-in bleeder resistances not used
1
Built-in bleeder resistances used
(initial value)
(initial value)
Bit 3—Read-Modify-Write Setting (RMW): Bit 3 selects whether display memory X or Y
address incrementing is carried out after a write/read access, or only after a write access (readmodify-write mode).
Bit 3: RMW
Description
0
Address is incremented after write/read access to display memory
(initial value)
1
Read-modify-write mode is set
In this mode, address is incremented only after write access to display memory
Bit 2—Reserved Bit: Bit 2 is reserved; it should always be cleared to 0.
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14. Dot Matrix LCD Controller (H8/3854 Group)
Bit 1—Increment Address Select (INC): Bit 1 selects either the X address or the Y address as
the address to be incremented after the display memory access specified by the RMW bit. The
selected address is cleared after a display memory access with the maximum value for the valid
display data area; in this case the other address is incremented.
Bit 1: INC
Description
0
Incrementing of display memory Y address has priority; X address is incremented
after Y address overflow
(initial value)
1
Incrementing of display memory X address has priority; Y address is incremented
after X address overflow
Bit 0—Reserved Bit: Bit 0 is reserved; it should always be cleared to 0.
14.2.4
Address Register (LR2)
Bit
7
6
5
4
3
2
1
0
XA2
XA1
XA0
⎯
YA3
YA2
YA1
YA0
Initial value
0
0
0
⎯
0
0
0
0
Read/Write
W
W
W
⎯
W
W
W
W
LR2 is an 8-bit write-only register that sets the display memory X- and Y-direction addresses
accessed by the CPU.
Upon reset, LR2 is initialized to H'00.
Bits 7 to 5—X Address Setting (XA2 to XA0): Bits 7 to 5 set the display memory X-direction
address. A value from H'0 to H'4 can be set. Do not perform access in the range H'5 to H'7.
When the INC bit in LR1 is set to 1, the address is automatically incremented after the access
specified by the RMW bit in LR1, and is cleared after an H'4 access. When INC is 0 and YA3 to
YA0 represent the maximum value for the valid display data area, the address is incremented after
the access specified by RMW.
Bit 4—Reserved Bit: Bit 4 is reserved; it should always be cleared to 0.
Bits 3 to 0—Y Address Setting (YA3 to YA0): Bits 3 to 0 set the display memory Y-direction
address. A value from H'0 to H'F can be set, but display data from H'8 to H'F is invalid with 1/8
duty.
When the INC bit in LR1 is cleared to 0, the address is automatically incremented after the access
specified by the RMW bit in LR1, and is cleared after an access with the maximum value for the
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valid display data area. When INC is 1 and the value in XA2 to XA0 is H'4, the address is
incremented after the access specified by RMW.
14.2.5
Frame Frequency Setting Register (LR3)
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
FS2
FS1
FS0
Initial value
⎯
⎯
⎯
⎯
⎯
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
W
W
W
LR3 is an 8-bit write-only register that sets the frame frequency.
Upon reset, LR3 is initialized to H'00.
Bits 7 to 3—Reserved Bits: Bits 7 to 3 are reserved; they should always be cleared to 0.
Bits 2 to 0—Frame Frequency Setting (FS2 to FS0): Bits 2 to 0 control the subclock division
ratio and set the LCD frame frequency. The relationship between the LCD frame frequency fF
(Hz), the subclock frequency fW (Hz), the division ratio r, and the LCD duty 1/N is as follows:
fF =
fW
r×N
Set a division ratio suitable for the characteristics of the LCD panel used. The correspondence
between register settings, division ratios, and frame frequencies at each display duty is shown in
table 14.3.
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14. Dot Matrix LCD Controller (H8/3854 Group)
Table 14.3 Register Settings, Division Ratios, and Frame Frequencies at Each Display Duty
Display Duty 1/N
1/8
1/16
Subclock Frequency fW (kHz)
32.768
38.4
32.768
38.4
FS2
FS1
FS0
Division
ratio r
0
0
0
2
2048.0
2400.0
1024.0
1200.0
1
4
1024.0
1200.0
512.0
600.0
0
8
512.0
600.0
256.0
300.0
1
16
256.0
300.0
128.0
150.0
0
32
128.0
150.0
64.0
75.0
1
64
64.0
75.0
32.0
37.5
0
128
32.0
37.5
16.0
18.8
1
Setting
prohibited
Setting
prohibited
Setting
prohibited
Setting
prohibited
Setting
prohibited
1
1
0
1
14.2.6
Frame Frequency fF (Hz)
Display Data Register (LR4)
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LR4 is an 8-bit read/write register used to perform read/write access to the display memory
specified by XA2 to XA0 and YA3 to YA0 in LR2.
In a write to display memory, the write is performed directly to the display memory via this
register. In a read, the data is temporarily latched into this register before being output to the bus.
After a reset, the display memory and LR4 contents are undefined.
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14.3
Operation
14.3.1
System Overview
The LCD controller operates at 1/16 or 1/8 duty. The display size is a maximum of 40 × 16 dots.
As the LCD controller operates on the subclock to perform display control, the time, etc., can be
constantly displayed. Also, since data in the display RAM is retained even in module standby
mode, low power consumption can be achieved without affecting the display.
H8/3854
RS
SEG1 to SEG40
R/W
CPU
STRB
LCD
controller
DB7
to DB0
COM1 to COM16
Figure 14.2 System Block Diagram
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LCD panel
14. Dot Matrix LCD Controller (H8/3854 Group)
14.3.2
CPU Interface
The LCD controller's registers are not included in the memory map shown in figure 2.16 (b). They
are controlled from the CPU by means of chip-internal LCD pins DB7 to DB0, RS, R/W, and
STRB, via chip-internal I/O ports 9 and A. The pin configuration is shown in table 14.4, and an
example of the timing for access to registers in the LCD controller is shown in figure 14.3. For
information on port 9 and port A, see the descriptions in section 8, I/O Ports.
Table 14.4 Pin Configuration
Pin Name
Abbr.
I/O
Function
Data bus
pins
DB7 to DB0
I/O
When R/W = 0, these pins input data to be written to a register;
when R/W = 1, they output data read from a register
Register
selector pin
RS
Input
When R/S = 0, the index register is selected; when RS = 1, a
control register is selected
Read/write
select pin
R/W
Input
When R/W = 0, write access is selected; when R/W = 1, read
access is selected
Strobe pin
STRB
Input
At the fall of STRB, read or write access, as selected by R/W,
is performed on the register selected by RS
Writing to Index Register
When RS and R/W are both cleared to 0, data DB7 to DB0 is written to the index register (IR) at
the falling edge of STRB. Do not change RS or R/W at the fall of STRB.
Reading and Writing to Control Registers
To access a control register, data indicating the number of the register to be accessed must be
written to the index register (IR) before making the access. The register number data to be written
to IR is shown in table 14.2. As the register number written to IR is retained until IR is written to
again, if the same control register is accessed repeatedly, it is not necessary to write to IR each
time.
In a write to a control register, when RS has been set to 1 and R/W cleared to 0, data DB7 to DB0
is written to the control register specified by the index register (IR) at the falling edge of STRB.
Except for the display data register (LR4), control registers cannot be read. In a read of LR4, when
the LR4 register number is written to the index register (IR), and RS and R/W are both set to 1,
DB7 to DB0 are set to output mode, and the display memory data at the address specified by the
address register (LR2) is output from DB7 to DB0 at the falling edge of STRB. If a read is also
performed in the next cycle, the data output is held until the next fall of STRB, but if a write is
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performed in the next cycle, DB7 to DB0 are set to input mode from the point at which R/W is
cleared to 0, and the output is cleared.
In either case, do not change RS or R/W at the fall of STRB.
RS
R/W
STRB
DB7 to
DB0
Data
Data
Data
Data
Data
Data
Index
Data
Index
Data
Data
Data
register write register write register write register read register read register write
Figure 14.3 Example of Timing Sequence for 8-Bit Data Transfer
Notes on Use of Chip-Internal I/O Ports
For LCD controller interface internal ports 9 and A, port input/output is controlled by means of
PCR9 and PCRA in the same way as for ordinary I/O ports, and in output mode, the values set in
PDR9 or PDRA are output. Also, LCD controller internal pins RS, R/W, and STRB are input-only
pins, and DB7 to DB0 input/output is controlled by R/W. Therefore, the following points must be
noted.
1. After reset release and standby mode release
Since the chip's internal I/O ports go to the high-impedance state in a reset and in standby
mode, in initialization after reset or standby mode release, H'06 should be set in PDRA, and
H'07 in PCRA. This will set port A to output mode. If the PDRA setting were H'00, there
would be a possibility of the index register (IR) being written to.
2. Changing register read/write setting
When an LCD controller register is read (R/W = 1), DB7 to DB0 output data from the LCD
controller side, and so port 9 must be set to input mode. Therefore, H'00 must be written to
PCR9, setting port 9 to input mode, before changing the R/W setting from 0 to 1. When
writing data to an LCD controller register, first change R/W from 1 to 0, then write H'FFF to
PCR9, setting port 9 to output mode.
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Examples of display data register (LR4) read/write access when read-modify-write is designated
are shown below.
[Set index register to display data register]
• Port A set to output mode, RMW set to 1
MOV.W
#H'0100,R1
MOV.W
#H'04FF,R0
MOV.B
R1L,@PDRA ............. Clear R/W to 0
MOV.B
R0H,@PDR9
MOV.B
R0L,@PCR9 ............. Output H'04 from port 9
MOV.B
R1H,@PDRA
MOV.B
R1L,@PDRA ............. Write H'04 to index register
[Read display data register]
MOV.B
R1L,@PCR9 ............. Set port 9 to input mode
MOV.W
#H'0706, R2
MOV.B
R2L,@PDRA ............. Set R/W to 1
MOV.B
R2H,@PDRA
MOV.B
R2L,@PDRA
MOV.B
@PDR9, R0H ............ Read PDR9 into general register
[Write to display data register]
MOV.W
#H'0504,R3
MOV.B
R3L,@PDRA ............. Clear R/W to 0
NOT.B
R0H
MOV.B
R0H,@PDR9
MOV.B
R0L,@PCR9 ............. Set port 9 to output mode
MOV.B
R3H,@PDRA
MOV.B
R3L @PDRA ............. Write data to display data register
............. Invert general register data
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14.3.3
LCD Drive Pin Functions
Common/Segment Output
The display duty is set by control register 1 (LR0) bits DDTY1.
• 1/8 duty (DDTY1 = 1)
Common outputs:
COM1 to COM8
Segment outputs:
SEG1 to SEG40
Note: COM9 to COM16 output common signal non-selection waveforms
• 1/16 duty (DDTY1 = 0)
Common outputs:
COM1 to COM16
Segment outputs:
SEG1 to SEG40
Table 14.5 Pin Functions According to Display Duty
Function
Pin Name
1/8 Duty
1/16 Duty
COM1 to COM8
COM1 to COM8
COM1 to COM16
COM9 to COM16
Common signal non-selection
waveform
SEG1 to SEG40
SEG1 to SEG40
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.3.4
Display Memory Configuration and Display
The LCD controller includes 40 × 16-bit bit-mapped display memory. As the display memory
configuration, an 8-bit × 5 X-direction combination can be selected, while the Y-direction
configuration is 16 bits. Display data written from the CPU is stored horizontally with the MSB at
the left and the LSB at the right, as shown in figure 14.4. On the display, 1 data corresponds to
illumination (black), and 0 data to non-illumination (colorless).
COM1
COM2
LCD
SEG1 SEG3 SEG5 SEG7
SEG40
SEG2 SEG4 SEG6 SEG8
Y address
H'00
1
0
1
0
1
0
1
0
H'01
0
1
0
1
0
1
0
1
DB7
(MSB)
DB0
(LSB)
Display memory
Figure 14.4 Memory Data and Display
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14.3.5
Display Data Output
The relationship between the LCD controller display duty and output pins is shown in figure 14.5.
(1) 1/8 duty
Display dots: 320
X address
H'0
H'1
H'2
H'3
H'4
H'7
H'8
H'F
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
Y address
H'0
(2) 1/16 duty
Display dots: 640
X address
H'0
H'1
H'2
H'3
H'4
H'07
H'08
H'1F
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
SEG36
SEG37
SEG38
SEG39
SEG40
Y address
H'00
Valid display data area
Figure 14.5 Display Duty and Valid Display Data Area
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14.3.6
Register and Display Memory Access
Register Access
To access a register, RS is first cleared to 0 and the register number of the register to be accessed
is set in the index register. Then RS is set to 1, enabling the specified register to be accessed.
Some internal registers have nonexistent bits; 0 must be written to these bits. The display data
register (LR4) is the only register that can be read.
Display Memory Access
To access the display memory, the address to be accessed is set in the address register (LR2). The
memory is then accessed via the display data register (LR4). This access can be performed without
awareness of the display-side read. See figure 14.6 for the procedure.
After the respective display data register (LR4) accesses, the X and Y addresses are automatically
incremented on the basis of the value set in the INC bit in control register 2 (LR1), and therefore
address settings need not be made each time.
With 1/16 duty (DDTY1 = 0), if INC = 0 the X address remains the same in each read/write access
to the display data register (LR4), while the Y address is automatically incremented up to H'F.
After reaching H'F, the Y address returns to H'0 again, and the X address is simultaneously
incremented. If INC = 1, on the other hand, the Y address remains the same in each read/write
access to the display data register (LR4), while the X address is automatically incremented up to
H'4. After reaching H'4, the X address returns to H'0 again, and the Y address is simultaneously
incremented. In this way, consecutive read/write accesses can be made to the entire display
memory area.
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14. Dot Matrix LCD Controller (H8/3854 Group)
X addres
H'0
H'1
H'4
Y address
H'0
H'1
H'F
(1) Priority given to Y-direction data access (INC = 0)
X address
H'0
H'1
H'4
Y address
H'0
H'1
H'F
(2) Priority given to X-direction data access (INC = 1)
Notes: 1. Address register (LR2) bits XA2 to XA0 show the X address, and bits YA3 to YA0 show the Y address.
2. X address operation
Address becomes H'0 after H'4, regardless of the duty.
3. Y address operation
Address becomes H'0 after H'0F when 1/16 duty is set, and after H'07 when 1/8 duty is set.
Figure 14.6 Display Memory Access Methods (1/16 Duty)
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14. Dot Matrix LCD Controller (H8/3854 Group)
Reading for Display
Reads for LCD display are performed asynchronously with respect to accesses by the CPU.
However, since simultaneous accesses would corrupt data in the RAM, arbitration is carried out
within the chip. Basically, accesses by the CPU have priority, and reads for display are performed
in the intervals between CPU accesses.
RS
R/W
STRB
Input data
H'02
[n, m]
H'04
data
[n, m]
Output data
Address
[*,*]
[n, m]
[n, m+1]
data
[n, m+1]
[n, m+2]
Figure 14.7 Memory Read Procedure
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14. Dot Matrix LCD Controller (H8/3854 Group)
Read-Modify-Write Mode
In the normal state, the X or Y address is incremented after both read and write accesses to the
display memory. In read-modify-write mode, the address is incremented only after a write, and
remains the same after a read. By using this mode, it is possible to read previously written data,
process that data, and then write it back to the same address.
START
Set address
Read data
Write data
(Address) + 1
No
End of modification?
Yes
END
Figure 14.8 Read-Modify-Write Mode Flowchart
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.3.7
Module Standby Mode
The LCD controller has a module standby function that enables low power consumption to be
achieved. In module standby mode, the current supply to the built-in bleeder resistances is halted,
and segment and common outputs go to the VSS (display-off state) level. Display RAM and
internal register data is retained, except for the DISP, LPS1, and LPS0 bits in control register 2
(LR1). The control registers can still be accessed in the module standby state. Figure 14.9 shows
the procedures for initiating and clearing module standby mode. The initiation and clearing
procedures must be followed exactly in order to protect the display memory contents.
When the CPU is placed in standby mode, set the LSBY bit in control register 1 (LR0) to 1 before
executing the standby instruction. After clearing standby mode, follow the module standby
clearing procedure to start display.
Initiation
Set LSBY to 1
Internal operation halts
Module standby mode initiated
Clearing
Clear LSBY to 0
Set LPS1*, LPS0*, and DISP to 1
Internal operation starts
Display starts
Note: * Do not set to 1 when an external power supply is used.
Figure 14.9 Module Standby Mode and Standby Mode Initiation and Clearing Procedures
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.3.8
Power-On and Power-Off Procedures
As the LCD controller incorporates a complete power supply circuit, the procedures shown in
figure 14.10 must be followed when powering on and off. Failure to follow these procedures may
result in an abnormal display.
Starting
display
Set DDTY1 according to mode used
Write data
Set LPS1*, LPS0*, and DISP to 1
Halting
display
Clear LPS1, LPS0, and DISP to 0
Note: * Do not set to 1 when an external power supply is used.
Figure 14.10 Power-On and Power-Off Procedures
14.3.9
Power Supply Circuit
The LCD controller has a built-in bleeder resistance circuit for LCD drive. In standby mode, the
voltage circuits are automatically turned off and the power consumption of the power supply
circuit falls to zero. The power supply circuit can be turned on and off by a command, and an
external power supply circuit should be used if the current capacity of the built-in step-up circuit is
insufficient.
LCD Drive Level
Six power supply levels⎯V1, V2, V3, V3, V4, V5, and VSS⎯are necessary for LCD drive. The
V1 to VSS power supplies are normally generated by means of resistive division.
When 1/4 bias is used for LCD display, the V3OUT and V4OUT pins should be shorted; when 1/5
bias is used, the V3OUT and V4OUT pins should be left open.
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14. Dot Matrix LCD Controller (H8/3854 Group)
External Power Supply
• When external power supply is input directly to pins V1OUT through V5OUT
A power supply can be applied directly to V1OUT, V2OUT, V3OUT, V4OUT, and V5OUT
from an external source by clearing bits LPS0 and LPS1 to 0 in control register 2 (LR1) to halt
the power supply to the built-in bleeder resistance circuit. Apply a voltage not exceeding VCC to
pins V1OUT through V5OUT.
• When an external power supply is input to pin V1OUT
V1 to V5 can be generated by inputting an external power supply to V1OUT, and using the
built-in bleeder resistances by setting the LPS1 bit to 1 in control register 2 (LR1). Apply a
voltage not exceeding VCC to pin V1OUT.
In either case, inputting a voltage exceeding VCC may adversely affect the reliability of the chip.
14.3.10 LCD Drive Power Supply Voltages
There are six LCD drive power supply voltage values⎯V1 to V5, and VSS. V1 is the highest
voltage, and VSS the lowest. As shown in figure 14.11, the common waveforms are formed from a
combination of V1, V2, V5, and VSS, while the segment waveforms are formed from a
combination of V1, V3, V4, and VSS. V1 and VSS are shared by both common and segment
waveforms, but the intermediate voltages are different.
In figure 14.11, the waveforms of outputs SEG1 to SEG40 differ according to the display data. In
this example, LCD panel lines for which COM1 is connected are illuminated, and all other dots
are not illuminated.
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14. Dot Matrix LCD Controller (H8/3854 Group)
1 frame
Line selection
period
V1
V2
V3
COM1
V4
V5
VSS
V1
V2
COM2 V3
V4
V5
VSS
V1
V2
V3
COM16
V4
V5
VSS
SEG1
V1
V2
V3
V4
V5
VSS
V1
V2
V3
SEG40 V4
V5
VSS
Not selected
Selected
Figure 14.11 LCD Drive Power Supply Waveforms (1/16 Duty)
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.3.11 LCD Voltage Generation Circuit
When Using Internal Power Supply and Built-In Bleeder Resistances
The LCD controller includes bleeder resistances that generate levels V1 to V5. For the LCD drive
power supply, drive can be performed using the internal power supply and VCC, or using an
external supply. When the internal power supply is used, and the built-in bleeder resistances are
employed, bits LPS1 and LPS0 in control register 2 (LR1) should both be set to 1. If the
capacitance of the LCD panel to be driven is large, capacitors of around 0.1 to 0.5 μF should be
inserted between V1OUT to V5OUT and VSS to provide stabilization.
VCC
LPS1 = 1
LPS0 = 1
ON
V1OUT
V1
R
ON
V2
V2OUT
R
V3OUT
V4OUT
V5OUT
+
0.1 to 0.5 μF
+
+
+
+
SEG1 to SEG40
ON
V3
R
Control
circuit
ON
V4
R
COM1 to COM16
ON
V5
R
VSS
ON
VSS
VSS
Note: When using 1/4 bias, short V3OUT and V4OUT.
Figure 14.12 When Using Internal Power Supply and Built-In Bleeder Resistances
(1/5 Bias)
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14. Dot Matrix LCD Controller (H8/3854 Group)
When Using External Power Supply and Built-In Bleeder Resistances
When an external power supply is supplied from V1OUT and the built-in bleeder resistances are
used, clear LPS1 to 0 and set LPS0 to 1 in control register 2 (LR1), and make the connections
shown in figure 14.13. The power supply applied to V1OUT must not exceed VCC. If the
capacitance of the LCD panel to be driven is large, capacitors of around 0.1 to 0.5 μF should be
inserted between V1OUT to V5OUT and VSS to provide stabilization.
VCC
External
power supply
LPS1 = 0
LPS0 = 1
OFF
V1OUT
V1
R
ON
V2
V2OUT
R
V3OUT
V4OUT
V5OUT
+
0.1 to 0.5 μF
+
+
+
R
R
SEG1 to SEG40
ON
ON
V3
Control
circuit
V4
COM1 to COM16
ON
V5
R
ON
VSS
VSS
VSS
Notes: 1. When using 1/5 bias, do not short V3OUT and V4OUT.
2. Set VSS ≤ V1OUT ≤ VCC.
Figure 14.13 When Using External Power Supply and Built-In Bleeder Circuit (1/4 Bias)
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14. Dot Matrix LCD Controller (H8/3854 Group)
When Using External Power Supply and Bleeder Resistances
If the drive capability of the built-in bleeder resistance is insufficient for the size of the LCD
panel, the V1 to V5 levels can be supplied from external bleeder resistances. In this case, clear the
LPS1 and LPS0 bits in control register 2 (LR1) to 0, and make the connections shown in figure
14.14.
External
power supply
VCC
LPS1 = 0
LPS0 = 0
OFF
V1
V1OUT
OFF
Rx
V2
V2OUT
SEG1 to SEG40
OFF
Rx
V3OUT
OFF
Rx
V4OUT
V3
Control
circuit
V4
COM1 to COM16
OFF
Rx
V5
V5OUT
OFF
Rx
VSS
VSS
VSS
Notes: 1. When using 1/4 bias, short V3OUT and V4OUT.
2. Set VSS ≤ Vin ≤ VCC (Vin: V1OUT to V5OUT).
3. A value of around 5 kΩ to 25 kΩ is recommended for external power supply division resistances Rx.
Figure 14.14 When Using External Power Supply and External Bleeder Circuit (1/5 Bias)
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14. Dot Matrix LCD Controller (H8/3854 Group)
14.3.12 LCD Drive Bias Selection Circuit
The ideal bias value that gives the best contrast is calculated using the equation shown below. If
drive is performed at a bias value lower than the optimum, contrast will deteriorate, but the LCD
drive voltage (the potential difference between V1 and VSS) can be kept low. If the output voltage
falls and the LCD display becomes faint as batteries wear out, for instance, the display can be
made clearer by decreasing the LCD drive bias.
Optimum bias value for 1/N duty drive =
1
N+1
Notes: 1. When using 1/5 bias, leave the V3OUT and V4OUT pins open.
2. When using 1/4 bias, short the V3OUT and V4OUT pins.
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15. Electrical Characteristics (H8/3857 Group)
Section 15 Electrical Characteristics
(H8/3857 Group)
15.1
H8/3855, H8/3856, and H8/3857 Absolute Maximum Ratings
(Standard Specifications)
Table 15.1 shows the absolute maximum ratings.
Table 15.1 Absolute Maximum Ratings
Item
Symbol
Value
Unit
Power supply voltage
VCC
–0.3 to +7.0
V
Analog power supply voltage
AVCC
–0.3 to +7.0
V
LCD power supply voltage
VLCD
–0.3 to +8.0
V
*1
Programming voltage (FWE)
Vin
–0.3 to VCC +0.3
V
*2
Except port B and LCD power supply
Vin
–0.3 to VCC +0.3
V
Port B
AVin
–0.3 to AVCC +0.3
V
LCD power supply
Vin
–0.3 to VLCD +0.3
V
*3
Operating temperature
Topr
–20 to +75
°C
*4
Storage temperature
Tstg
–55 to +125
°C
Input
voltage
Caution:
Notes: 1.
2.
3.
4.
Notes
Permanent damage may occur to the chip if maximum ratings are exceeded. Normal
operation should be under the conditions specified in Electrical Characteristics.
Exceeding these values can result in incorrect operation and reduced reliability.
A voltage not lower than VCC must be applied as LCD power supply voltage VLCD.
12 V must not be applied to the FWE pin, as this will permanently damage the device.
When the built-in op-amps are not used, and the LCD drive voltages are supplied
directly from an external source, this applies to V1OUT, V2OUT, V3OUT, V4OUT, and
V5OUT.
The operating temperature range when programming/erasing flash memory is: Ta = 0°C
to +75°C.
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15. Electrical Characteristics (H8/3857 Group)
15.2
H8/3855, H8/3856, and H8/3857 Electrical Characteristics
(Standard Specifications)
15.2.1
Power Supply Voltage and Operating Range
The power supply voltage and operating range of the H8/3855, H8/3856, and H8/3857 are
indicated by the shaded region in the figures below.
(1) Power Supply Voltage vs. Oscillator Frequency Range
32.768
fW (kHz)
fOSC (MHz)
10.0
5.0
2.0
3.0
4.0
5.5
3.0
VCC (V)
• Active mode (high speed)
• Sleep mode
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4.0
5.5
VCC (V)
• All operating modes
15. Electrical Characteristics (H8/3857 Group)
(2) Power Supply Voltage vs. Operating Frequency Range
φ SUB (kHz)
φ (MHz)
5.0
2.5
1.0
0.5
19.200
16.384
*
9.600
8.192
4.800
4.096
*
}*
3.0
4.0
*
5.5
3.0
4.0
VCC (V)
5.5
VCC (V)
• Active mode (high speed)
• Sleep mode (except CPU)
• Subactive mode
• Subsleep mode (except CPU)
• Watch mode (except CPU)
φ (kHz)
625.0
500.0
312.5
62.5
3.0
4.0
5.5
VCC (V)
Note: * In case of external clock only
• Active mode (medium speed)
(3) Analog Power Supply Voltage vs. A/D Converter Operating Range
625.0
φ (kHz)
φ (MHz)
5.0
2.5
0.5
500.0
312.5
62.5
3.0
4.0
5.5
AVCC (V)
• Active mode (high speed)
• Sleep mode (except CPU)
3.0
4.0
5.5
AVCC (V)
• Active mode (medium speed)
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15. Electrical Characteristics (H8/3857 Group)
15.2.2
DC Characteristics
Table 15.2 shows the DC characteristics of the H8/3855, H8/3856, and H8/3857.
Table 15.2 DC Characteristics of H8/3855, H8/3856, and H8/3857 (1)
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*4,
including subactive mode, unless otherwise specified.
Values
Item
Symbol Applicable Pins
Input high
voltage
VIH
Typ
Max
VCC = 4.0 V to 5.5 V 0.8 VCC
RES,
WKP0 to WKP7,
IRQ0 to IRQ4,
TMIB, TMIC, TMIF,
TEST2, FWE,
0.9 VCC
SCK1, SCK3,
ADTRG
Test Conditions
⎯
VCC +0.3 V
⎯
VCC +0.3
UD, SI1, RXD
VCC = 4.0 V to 5.5 V 0.7 VCC
⎯
VCC +0.3 V
0.8 VCC
⎯
VCC +0.3
OSC1
VCC = 4.0 V to 5.5 V VCC –0.5 ⎯
X1
Input low
voltage
VIL
Min
Unit Notes
VCC +0.3 V
VCC –0.3 ⎯
VCC +0.3
VCC –0.3 ⎯
VCC +0.3 V
P10 to P17,
P20 to P27,
P30 to P37,
P40 to P43,
P50 to P57
VCC = 4.0 V to 5.5 V 0.7 VCC
⎯
VCC +0.3 V
0.8 VCC
⎯
VCC +0.3
PB0 to PB7
VCC = 4.0 V to 5.5 V 0.7 VCC
⎯
AVCC +0.3 V
0.8 VCC
⎯
AVCC +0.3
⎯
0.2 VCC
⎯
0.1 VCC
VCC = 4.0 V to 5.5 V –0.3
RES,
WKP0 to WKP7,
IRQ0 to IRQ4,
TMIB, TMIC, TMIF,
TEST2, FWE,
–0.3
SCK1, SCK3,
ADTRG
UD, SI1, RXD
OSC1
VCC = 4.0 V to 5.5 V –0.3
⎯
0.3 VCC
–0.3
⎯
0.2 VCC
VCC = 4.0 V to 5.5 V –0.3
⎯
0.5
–0.3
⎯
0.3
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V
V
V
15. Electrical Characteristics (H8/3857 Group)
Values
Item
Symbol Applicable Pins
Input low
voltage
VIL
Min
Typ
Max
Unit Notes
–0.3
⎯
0.3
V
P10 to P17,
P20 to P27,
P30 to P37,
P40 to P43,
P50 to P57,
PB0 to PB7
VCC = 4.0 V to 5.5 V –0.3
⎯
0.3 VCC
V
–0.3
⎯
0.2 VCC
P10 to P17,
P20 to P27,
P30 to P37,
P40 to P42,
P50 to P57
VCC = 4.0 V to 5.5 V VCC –1.0 ⎯
–IOH = 1.0 mA
⎯
VCC = 4.0 V to 5.5 V VCC –0.5 ⎯
–IOH = 0.5 mA
⎯
VCC –0.5 ⎯
⎯
P10 to P17,
P40 to P42,
P50 to P57
VCC = 4.0 V to 5.5 V ⎯
IOL = 1.6 mA
⎯
⎯
0.5
P20 to P27,
P30 to P37
VCC = 4.0 V to 5.5 V ⎯
IOL = 10 mA
⎯
1.5
VCC = 4.0 V to 5.5 V ⎯
IOL = 1.6 mA
⎯
0.6
⎯
⎯
0.5
RES, TEST2, FWE, Vin = 0.5 V to
OSC1,
VCC – 0.5 V
P10 to P17,
P20 to P27,
P30 to P37,
P40 to P43,
P50 to P57
⎯
⎯
1.0
μA
PB0 to PB7
Vin = 0.5 V to
AVCC – 0.5 V
⎯
⎯
1.0
μA
Pull-up MOS –Ip
current
P10 to P17,
P30 to P37,
P50 to P57
VCC = 5 V, Vin = 0 V
50.0
⎯
300.0
μA
VCC = 3.3 V,
Vin= 0 V
⎯
100
⎯
μA
Input
Cin
capacitance
All input pins except f = 1 MHz, Vin = 0 V, ⎯
power supply pins
Ta = 25°C
⎯
15.0
pF
Active mode IOPE1
current
dissipation
VCC
Active mode
(high speed)
VCC = 5 V,
fOSC = 10 MHz
⎯
10.0
15.0
mA
*
2
*
IOPE2
VCC
Active mode
(medium speed)
VCC = 5 V,
fOSC = 10 MHz
⎯
2.0
3.5
mA
*
2
*
Output high
voltage
Output low
voltage
VOH
VOL
Test Conditions
X1
–IOH = 0.1 mA
IOL = 0.4 mA
IOL = 0.4 mA
Input/output ⏐IIL⏐
leakage
current
⎯
0.6
V
V
V
Reference
values
1
1
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15. Electrical Characteristics (H8/3857 Group)
Values
Item
Test Conditions
Min
Typ
Max
Unit Notes
Sleep mode ISLEEP
current
dissipation
Symbol Applicable Pins
VCC
VCC = 5 V,
fOSC = 10 MHz
⎯
4.0
7.0
mA
*
2
*
ISUB
Subactive
mode current
dissipation
VCC
VCC = 3.3 V,
LCD on, (with 2X
step-up) 32-kHz
crystal oscillator
used (φSUB= φW/2)
⎯
70
150
μA
*
2
*
VCC = 3.3 V,
LCD on, (with 2X
step-up) 32-kHz
crystal oscillator
used (φSUB= φW/8)
⎯
65
⎯
μA
*
2
*
Reference
values
⎯
VCC = 3.3 V,
LCD not used, 32kHz crystal oscillator
used (φSUB= φW/2)
20
⎯
μA
*
2
*
Reference
values
1
1
1
1
ISUBSP
Subsleep
mode current
dissipation
VCC
VCC = 3.3 V,
LCD on, (with 2X
step-up) 32-kHz
crystal oscillator
used (φSUB= φW/2)
⎯
65
130
μA
*
2
*
Watch mode IWATCH
current
dissipation
VCC
VCC = 3.3 V,
LCD on, (with 2X
step-up) 32-kHz
crystal oscillator
used
⎯
60
90.0
μA
*
2
*
VCC = 3.3 V,
LCD not used,
32-kHz crystal
oscillator used
⎯
7.0
15.0
μA
*
2
*
1
1
1
ISTBY
Standby
mode current
dissipation
VCC
32-kHz crystal
oscillator not used
⎯
⎯
5.0
μA
*
2
*
IFLASH
Program/
erase current
dissipation
VCC
0°C ≤ Ta ≤ 70°C
fOSC = 12 MHz
⎯
16
22
mA
*
2
*
3
*
VRAM
VCC
2.0
⎯
⎯
V
*
2
*
RAM data
retaining
voltage
Rev.3.00 Jul. 19, 2007 page 408 of 532
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1
1
1
15. Electrical Characteristics (H8/3857 Group)
Notes: 1. Pin states during current measurement
Mode
Pins
LCD Power Supply
Oscillator Pins
Active mode (high Operates
and medium speed)
Internal State
VCC
VLCD = 6.0 V
System clock oscillator: Crystal
Subclock oscillator: Pin X1 = VCC
Sleep mode
Only timer operates
VCC
VLCD = 6.0 V
Subactive mode
Operates
VCC
VLCD = 6.0 V
(When LCD is not
used, VLCD = VCC)
Subsleep mode
Only timer operates,
CPU stops
VCC
VLCD = 6.0 V
Watch mode
Only time-base clock
operates, CPU stops
VCC
VLCD = 6.0 V
(When LCD is not
used, VLCD = VCC)
Standby mode
CPU and timers all stop VCC
VLCD = VCC
System clock oscillator: Crystal
Subclock oscillator: Pin X1 = VCC
Programming/
3
erasing*
Operates
VLCD = VCC
System clock oscillator: Crystal
Subclock oscillator: Pin X1 = VCC
VCC
System clock oscillator: Crystal
Subclock oscillator: Crystal
2. Excludes current in pull-up MOS transistors and output buffers.
3. Applies to F-ZTAT version only.
4. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
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15. Electrical Characteristics (H8/3857 Group)
Table 15.3 DC Characteristics of H8/3855, H8/3856, and H8/3857 (2)
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*2,
including subactive mode, unless otherwise specified.
Values
Item
Symbol Applicable Pins
Test Conditions
Min
Typ
Max
Unit
Notes
Allowable
output low
current
(per pin)
IOL
Output pins except
in ports 2 and 3
VCC = 4.0 V to 5.5 V
⎯
⎯
2.0
mA
*
Ports 2 and 3
VCC = 4.0 V to 5.5 V
⎯
⎯
10.0
⎯
⎯
0.5
mA
*
mA
*
mA
*
All output pins
Allowable
ΣIOL
output low
current (total)
Output pins except
in ports 2 and 3
VCC = 4.0 V to 5.5 V
⎯
⎯
20.0
Ports 2 and 3
VCC = 4.0 V to 5.5 V
⎯
⎯
80.0
⎯
⎯
20.0
⎯
⎯
2.0
⎯
⎯
0.2
⎯
⎯
10.0
⎯
⎯
8.0
All output pins
Allowable
output high
current
(per pin)
–IOH
Σ–IOH
Allowable
output high
current (total)
All output pins
All output pins
VCC = 4.0 V to 5.5 V
VCC = 4.0 V to 5.5 V
1
1
1
1
Notes: 1. Excludes LCD output pins.
2. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 410 of 532
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15. Electrical Characteristics (H8/3857 Group)
15.2.3
AC Characteristics
Table 15.4 shows the control signal timing, and tables 15.5 and 15.6 show the serial interface
timing, of the H8/3855, H8/3856, and H8/3857.
Table 15.4 Control Signal Timing of H8/3855, H8/3856, and H8/3857
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*3,
including subactive mode, unless otherwise specified.
Item
Applicable
Symbol Pins
System clock
fOSC
oscillation frequency
OSC1, OSC2
OSC clock (φOSC)
cycle time
tOSC
OSC1, OSC2
System clock (φ)
cycle time
tcyc
Values
Test Conditions
Min
Typ
Max
Reference
Unit Figure
MHz
VCC = 4.0 V to 5.5 V 2.0
⎯
10.0
2.0
⎯
5.0
VCC = 4.0 V to 5.5 V 100.0
⎯
1000.0 ns
*
200.0
⎯
1000.0
Figure 15.1
2
⎯
16
⎯
⎯
2000.0 ns
tOSC
1
1
*
Subclock oscillation fW
frequency
X1, X2
⎯
32.768 ⎯
Watch clock (φW)
cycle time
tW
X1, X2
⎯
30.5
⎯
μs
Subclock (φSUB)
cycle time
tsubcyc
2
⎯
8
tW
2
⎯
⎯
tcyc
tsubcyc
VCC = 4.0 V to 5.5 V 40.0
⎯
⎯
ms
60.0
⎯
⎯
2
⎯
⎯
s
ns
Figure 15.1
ns
Figure 15.1
ns
Figure 15.1
ns
Figure 15.1
Instruction cycle time
Oscillation
stabilization time
(crystal oscillator)
trc
Oscillation
stabilization time
trc
X1, X2
External clock high
width
tCPH
OSC1
External clock low
width
tCPL
External clock rise
time
tCPr
External clock fall
time
tCPf
OSC1, OSC2
OSC1
OSC1
OSC1
VCC = 4.0 V to 5.5 V 40.0
⎯
⎯
80.0
⎯
⎯
VCC = 4.0 V to 5.5 V 40.0
⎯
⎯
80.0
⎯
⎯
VCC = 4.0 V to 5.5 V ⎯
⎯
15.0
⎯
⎯
20.0
VCC = 4.0 V to 5.5 V ⎯
⎯
15.0
⎯
⎯
20.0
kHz
2
*
Rev.3.00 Jul. 19, 2007 page 411 of 532
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15. Electrical Characteristics (H8/3857 Group)
Item
Applicable
Symbol Pins
Values
Test Conditions
Min
Typ
Max
Reference
Unit Figure
External subclock
high width
tXH
X1
0.4/fx
⎯
⎯
s
Figure 15.2
External subclock
low width
tXL
X1
0.4/fx
⎯
⎯
s
Figure 15.2
External subclock
rise time
tXr
X1
⎯
⎯
100.0
ns
Figure 15.2
External subclock
fall time
tXf
X1
⎯
⎯
100.0
ns
Figure 15.2
RES pin low width
tREL
RES
10
⎯
⎯
tcyc
Figure 15.3
Input pin high width
tIH
IRQ0 to IRQ4,
WKP0 to WKP7,
ADTRG, TMIB,
TMIC, TMIF
2
⎯
⎯
tcyc Figure 15.4
tsubcyc
Input pin low width
tIL
IRQ0 to IRQ4,
WKP0 to WKP7,
ADTRG, TMIB,
TMIC, TMIF
2
⎯
⎯
tcyc Figure 15.4
tsubcyc
UD pin minimum
transition width
tUDH
tUDL
UD
4
⎯
⎯
tcyc Figure 15.5
tsubcyc
Notes: 1. A frequency between 1 MHz and 10 MHz is required when an external clock is input.
2. Selected with bits SA1 and SA0 in system control register 2 (SYSCR2).
3. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 412 of 532
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15. Electrical Characteristics (H8/3857 Group)
Table 15.5 Serial Interface (SCI1) Timing of H8/3855, H8/3856, and H8/3857
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*,
unless otherwise specified.
Applicable
Symbol Pins
Item
Values
Test Conditions
Min
Typ
Max
Reference
Unit Figure
Input serial clock
cycle time
tScyc
SCK1
4
⎯
⎯
tcyc
Figure 15.6
Input serial clock
high width
tSCKH
SCK1
0.4
⎯
⎯
tScyc
Figure 15.6
Input serial clock
low width
tSCKL
SCK1
0.4
⎯
⎯
tScyc
Figure 15.6
Input serial clock
rise time
tSCKr
SCK1
ns
Figure 15.6
Input serial clock
fall time
tSCKf
ns
Figure 15.6
Serial output data
delay time
tSOD
ns
Figure 15.6
Serial input data
setup time
tSIS
ns
Figure 15.6
Serial input data
hold time
tSIH
ns
Figure 15.6
Note:
*
SCK1
SO1
SI1
SI1
VCC = 4.0 V to 5.5 V
VCC = 4.0 V to 5.5 V
VCC = 4.0 V to 5.5 V
VCC = 4.0 V to 5.5 V
VCC = 4.0 V to 5.5 V
⎯
⎯
60.0
⎯
⎯
80.0
⎯
⎯
60.0
⎯
⎯
80.0
⎯
⎯
200.0
⎯
⎯
350.0
200.0
⎯
⎯
400.0
⎯
⎯
200.0
⎯
⎯
400.0
⎯
⎯
The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 413 of 532
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15. Electrical Characteristics (H8/3857 Group)
Table 15.6 Serial Interface (SCI3) Timing of H8/3855, H8/3856, and H8/3857
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*,
unless otherwise specified.
Values
Min
Typ
Max
Unit
Reference
Figure
Input clock Asynchronous tScyc
cycle
Synchronous
4
⎯
⎯
tcyc
Figure 15.7
6
⎯
⎯
Input clock pulse width
tSCKW
0.4
⎯
0.6
tScyc
Figure 15.7
Transmit data delay time
(synchronous mode)
tTXD
VCC = 4.0 V to 5.5 V ⎯
⎯
1
tcyc
Figure 15.8
⎯
⎯
Receive data setup time
(synchronous mode)
tRXS
VCC = 4.0 V to 5.5 V 200.0 ⎯
⎯
ns
Figure 15.8
400.0 ⎯
⎯
Receive data hold time
(synchronous mode)
tRXH
VCC = 4.0 V to 5.5 V 200.0 ⎯
⎯
ns
Figure 15.8
400.0 ⎯
⎯
Item
Note:
Symbol Test Conditions
*
1
The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 414 of 532
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15. Electrical Characteristics (H8/3857 Group)
15.2.4
A/D Converter Characteristics
Table 15.7 shows the A/D converter characteristics of the H8/3855, H8/3856, and H8/3857.
Table 15.7 A/D Converter Characteristics of H8/3855, H8/3856, and H8/3857
VCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*4, unless otherwise specified.
Applicable
Item
Symbol Pins
Values
Test
Conditions
Reference
Min
Typ
Max
Unit Figure
V
Analog power supply AVCC
voltage
AVCC
3.0
⎯
5.5
Analog input voltage AVIN
AN0 to AN7
AVSS –0.3
⎯
AVCC +0.3 V
Analog power supply AIOPE
current
AISTOP1
AVCC
AVCC = 5.0 V
⎯
⎯
1.5
mA
AVCC
AVCC = 5.0 V
⎯
300
⎯
μA
*
Reference
value
AISTOP2
AVCC
⎯
⎯
5.0
μA
*
Analog input
capacitance
CAIN
AN0 to AN7
⎯
⎯
30.0
pF
Allowable signal
source impedance
RAIN
⎯
⎯
5.0
kΩ
Resolution (data
length)
⎯
⎯
8
Bit
Non-linearity error
⎯
⎯
±2.0
LSB
Quantization error
⎯
⎯
±0.5
LSB
Absolute accuracy
⎯
⎯
±2.5
LSB
Conversion time
12.4
⎯
124
μs
1
*
2
3
Notes: 1. Set AVCC ≤ VCC, and set AVCC = VCC when the A/D converter is not used.
2. AISTOP1 is the current in active and sleep modes while the A/D converter is idle.
3. AISTOP2 is the current at reset and in standby, watch, subactive, and subsleep modes
while the A/D converter is idle.
4. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 415 of 532
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15. Electrical Characteristics (H8/3857 Group)
15.2.5
LCD Characteristics
Table 15.8 shows the LCD characteristics, and table 15.9 shows the step-up circuit characteristics,
of the H8/3855, H8/3856, and H8/3857.
Table 15.8 LCD Characteristics of H8/3855, H8/3856, and H8/3857
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*4,
including subactive mode, unless otherwise specified.
Values
Item
Symbol Applicable Pins Test Conditions Min
Typ
Max Unit Notes
Common driver
on-resistance
RCOM
COM1 to COM32 ±Id = 0.05 mA,
VLCD = 4 V
⎯
6
20
kΩ
*1
Segment driver
on-resistance
RSEG
SEG1 to SEG64 ±Id = 0.05 mA,
VLCD = 4 V
⎯
6
20
kΩ
*1
LCD power
supply current
IEE
VLCD
⎯
20
40
μA
*2
LCD power
supply voltage
VLCD
VLCD
VCC
⎯
7.0
V
*3
VLCD = 5.5 V,
fx = 32.768 kHz
Notes: 1. Applies to the resistance (RCOM) between the V1OUT, V2OUT, V5OUT, and VSS pins and
the common signal pins (COM1 to COM32), and the resistance (RSEG) between the
V1OUT, V3OUT, V4OUT, and VSS pins and the segment signal pins (SEG1 to SEG64),
when Id is flowing in the pins.
2. This is the current when the built-in op-amps are operating and display is halted (all
driver outputs are at the VSS level).
3. Specifies the voltage range in which the COM/SEG pin output voltages are within the
LCD reference voltage values (V1, V2, V3, V4, V5, and VSS) ±0.15 V in the unloaded
state. A voltage not lower than VCC must be applied to VLCD.
4. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 416 of 532
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15. Electrical Characteristics (H8/3857 Group)
Table 15.9 Step-Up Circuit Characteristics of H8/3855, H8/3856, and H8/3857
VCC = 3.0 V to 5.5 V, AVCC = 3.0 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = –20°C to +75°C*2,
including subactive mode, unless otherwise specified.
Item
Values
Applicable
Symbol Pins
Test Conditions Min Typ Max Unit Notes
2X step-up output VUP2
voltage
VLOUT
VCC = Vci = 3.0 V,
IO = 0.03 mA,
C = 1 μF,
X1 = 32 kHz,
Ta = 25°C
⎯
5.96 ⎯
V
Figure 15.9
Reference
values
3X step-up output VUP3
voltage
VLOUT
VCC = 3.0 V,
Vci = 2.0 V,
IO = 0.03 mA,
C = 1 μF,
X1 = 32 kHz,
Ta = 25°C
⎯
5.90 ⎯
V
Figure 15.9
Reference
values
Step-up circuit
Vci
reference voltage
Vci
Vci ≤ VCC
1.6
⎯
V
*1
3.5
Notes: 1. As VCC ≤ VLOUT ≤ 7.0 V, with 2X step-up VCC/2 ≤ Vci ≤ 3.5 V, and with 3X step-up
VCC/3 ≤ Vci ≤ 2.33 V.
A voltage not exceeding VCC should be input to Vci. If this condition is not observed,
there is a risk of permanent damage to the device.
2. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 417 of 532
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15. Electrical Characteristics (H8/3857 Group)
15.2.6
Flash Memory Characteristics
Table 15.10 shows the flash memory characteristics.
Table 15.10 Flash Memory Characteristics
Conditions: VCC = 4.5 V to 5.5 V, AVCC = 4.5 V to 5.5 V, VSS = AVSS = 0.0 V, Ta = 0°C to +75°C
(program/erase operating temperature range)
Item
1 2 4
Programming time* * *
1 3 5
Erase time* * *
Min
Typ Max Unit
tP
⎯
10
200
ms/32 bytes
tE
⎯
100
300
ms/block
Times
NWEC
⎯
⎯
100
Wait time after SWE bit setting*
x
10
⎯
⎯
μs
1
y
50
⎯
⎯
μs
Wait time after P bit setting* *
z
⎯
⎯
200
μs
1
α
10
⎯
⎯
μs
β
10
⎯
⎯
μs
Rewrite times
Programming
Symbol
1
Wait time after PSU bit setting*
1 4
Wait time after P bit clearing*
1
Wait time after PSU bit clearing*
γ
4
⎯
⎯
μs
Wait time after H'FF dummy write* ε
2
⎯
⎯
μs
η
4
⎯
⎯
μs
N
⎯
⎯
1000 Times
x
10
⎯
⎯
1
Wait time after PV bit setting*
1
1
Wait time after PV bit clearing*
1 4
Maximum number of writes* *
Erasing
1
Wait time after SWE bit setting*
1
Wait time after ESU bit setting*
1 5
Wait time after E bit setting* *
1
Wait time after E bit clearing*
1
Wait time after ESU bit clearing*
1
Wait time after EV bit setting*
μs
y
200
⎯
⎯
μs
z
⎯
⎯
5
ms
α
10
⎯
⎯
μs
β
10
⎯
⎯
μs
γ
20
⎯
⎯
μs
Wait time after H'FF dummy write* ε
2
⎯
⎯
μs
1
η
5
⎯
⎯
μs
1 5
N
⎯
⎯
60
Times
1
Wait time after EV bit clearing*
Maximum number of erases* *
Test
Conditions
Notes: 1. Follow the program/erase algorithms when making the time settings.
2. Programming time per 32 bytes. (Indicates the total time during which the P bit is set in
flash memory control register 1 (FLMCR1). Does not include the program-verify time.)
3. Time to erase one block. (Indicates the time during which the E bit is set in FLMCR1.
Does not include the erase-verify time.)
4. Maximum programming time
(tP(max) = Wait time after P bit setting (z) × maximum number of writes (N))
5. Maximum erase time
(tE(max) = Wait time after E bit setting (z) × maximum number of erases (N))
Rev.3.00 Jul. 19, 2007 page 418 of 532
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15. Electrical Characteristics (H8/3857 Group)
15.3
Operation Timing
Figures 15.1 to 15.8 show timing diagrams.
tOSC
VIH
VIL
OSC1
tCPH
tCPL
tCPr
tCPf
Figure 15.1 System Clock Input Timing
VIH
VIL
X1
tXH
tXL
tXr
tXf
Figure 15.2 Subclock Input Timing
RES
VIL
tREL
Figure 15.3 RES Pin Low Width Timing
IRQ0 to IRQ4,
WKP0 to WKP7,
ADTRG,
TMIB, TMIC,
TMIF
VIH
VIL
tIL
tIH
Figure 15.4 Input Timing
VIH
UD
VIL
tUDL
tUDH
Figure 15.5 UD Pin Minimum Transition Width Timing
Rev.3.00 Jul. 19, 2007 page 419 of 532
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15. Electrical Characteristics (H8/3857 Group)
tScyc
SCK1
VIH or VOH*
VIL or VOL*
tSCKL
tSCKH
tSCKf
tSCKr
tSOD
VOH*
VOL*
SO1
tSIS
tSIH
SI1
Note: * Output timing reference levels
Output high
VOH = 2.0 V
Output low
VOL = 0.8 V
Load conditions are shown in figure 15.10.
Figure 15.6 SCI1 Input/Output Timing
tSCKW
SCK3
tScyc
Figure 15.7 SCK3 Input Clock Timing
Rev.3.00 Jul. 19, 2007 page 420 of 532
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15. Electrical Characteristics (H8/3857 Group)
tScyc
VIH or VOH*
VIL or VOL*
SCK3
tTXD
VOH*
VOL*
TXD
(transmit data)
tRXS
tRXH
RXD
(receive data)
Note: * Output timing reference levels
VOH = 2.0 V
Output high
Output low
VOL = 0.8 V
Load conditions are shown in figure 15.10.
Figure 15.8 SCI3 Input/Output Timing in Synchronous Mode
(2X step-up)
+
+
1 μF
1 μF
VSS
VLCD
VLOUT
C1+
C1–
C2+
C2–
VCi
1 μF
(3X step-up)
IO
VSS
3.0 V
VCC
+
1 μF 1 μF
+
+
2.0 V
VSS
VLCD
VLOUT
C1+
C1–
C2+
C2–
VCi
IO
VSS
3.0 V
VCC
Figure 15.9 Step-Up Circuit Characteristics Test Circuits
Rev.3.00 Jul. 19, 2007 page 421 of 532
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15. Electrical Characteristics (H8/3857 Group)
15.4
Output Load Circuit
VCC
2.4 kΩ
LSI Chip Output pin
30 pF
12 kΩ
Figure 15.10 Output Load Conditions
15.5
Usage Note
Although both the F-ZTAT and mask ROM versions fully meet the electrical specifications listed
in this manual, there may be differences in the actual values of the electrical characteristics,
operating margins, noise margins, and so forth, due to differences in the fabrication process, the
on-chip ROM, and the layout patterns.
If the F-ZTAT version is used to carry out system evaluation and testing, therefore, when
switching to the mask ROM version the same evaluation and testing procedures should also be
conducted on the mask ROM version.
Rev.3.00 Jul. 19, 2007 page 422 of 532
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16. Electrical Characteristics (H8/3854 Group)
Section 16 Electrical Characteristics
(H8/3854 Group)
16.1
H8/3852, H8/3853, and H8/3854 Absolute Maximum Ratings
(Standard Specifications)
Table 16.1 shows the absolute maximum ratings.
Table 16.1 Absolute Maximum Ratings
Item
Symbol
Value
Unit
Notes
Power supply voltage
VCC
–0.3 to +7.0
V
Programming voltage (FWE)
Vin
–0.3 to VCC +0.3
V
Input voltage
Except LCD power supply
Vin
–0.3 to VCC +0.3
V
LCD power supply
Vin
–0.3 to VCC +0.3
V
*2
Operating temperature
Topr
–20 to +75
°C
*3
Storage temperature
Tstg
–55 to +125
°C
*1
Caution:
Permanent damage may occur to the chip if maximum ratings are exceeded. Normal
operation should be under the conditions specified in Electrical Characteristics.
Exceeding these values can result in incorrect operation and reduced reliability.
Notes: 1. 12 V must not be applied to the FWE pin, as this will permanently damage the device.
2. When the internal power supply and internal bleeder resistances are not used, and the
LCD drive voltages are supplied directly from an external source, this applies to
V1OUT, V2OUT, V3OUT, V4OUT, and V5OUT.
3. The operating temperature range when programming/erasing flash memory is: Ta = 0°C
to +75°C.
Rev.3.00 Jul. 19, 2007 page 423 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.2
H8/3852, H8/3853, and H8/3854 Electrical Characteristics
(Standard Specifications)
16.2.1
Power Supply Voltage and Operating Range
The power supply voltage and operating range of the H8/3852, H8/3853, and H8/3854 are
indicated by the shaded region in the figures below.
(1) Power Supply Voltage vs. Oscillator Frequency Range
32.768
fW (kHz)
fOSC (MHz)
10.0
5.0
2.0
2.7* 3.0
4.0
5.5
2.7* 3.0
4.0
VCC (V)
• Active mode (high speed)
• Sleep mode
5.5
VCC (V)
• Active mode (medium speed)
Note: * The minimum VCC level of the H8/3854F is 3.0 V.
Rev.3.00 Jul. 19, 2007 page 424 of 532
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16. Electrical Characteristics (H8/3854 Group)
(2) Power Supply Voltage vs. Operating Frequency Range
φ SUB (kHz)
φ (MHz)
5.0
2.5
1.0
0.5
} *1
2.7*2 3.0
4.0
19.200
16.384
*1
9.600
8.192
4.800
4.096
*1
*1
2.7*2 3.0
5.5
4.0
VCC (V)
• Active mode (high speed)
• Sleep mode (except CPU)
• Subactive mode
• Subsleep mode (except CPU)
• Watch mode (except CPU)
625.0
φ (kHz)
5.5
VCC (V)
Notes: 1. In case of external clock only
500.0
2. The minimum VCC level of the
H8/3854F is 3.0 V.
312.5
62.5
2.7 3.0
4.0
5.5
VCC (V)
• Active mode (medium speed)
(3) Power Supply Voltage vs. A/D Converter Operating Range
625.0
φ (kHz)
φ (MHz)
5.0
2.5
500.0
312.5
62.5
0.5
2.7* 3.0
4.0
5.5
2.7 3.0
4.0
VCC (V)
• Active mode (high speed)
• Sleep mode
5.5
VCC (V)
• Active mode (medium speed)
Note: * The minimum VCC level of the H8/3854F is 3.0 V.
Rev.3.00 Jul. 19, 2007 page 425 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.2.2
DC Characteristics
Table 16.2 shows the DC characteristics of the H8/3852, H8/3853, and H8/3854.
Table 16.2 DC Characteristics of H8/3852, H8/3853, and H8/3854 (1)
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F, VSS = 0.0 V, Ta = –20°C to +75°C*4, including subactive mode,
unless otherwise specified.
Values
Item
Symbol Applicable Pins
Input high
voltage
VIH
Test Conditions
VIL
Typ
Max
Unit Notes
RES,
WKP0 to WKP7,
IRQ0, IRQ1,
IRQ3, IRQ4,
TMIB, TMIF,
TEST2, FWE,
SCK3, ADTRG
VCC = 4.0 V to 5.5 V 0.8 VCC
⎯
VCC +0.3 V
0.9 VCC
⎯
VCC +0.3
RXD
VCC = 4.0 V to 5.5 V 0.7 VCC
⎯
VCC +0.3 V
0.8 VCC
⎯
VCC +0.3
OSC1
VCC = 4.0 V to 5.5 V VCC –0.5 ⎯
VCC +0.3 V
VCC –0.3 ⎯
VCC +0.3
VCC –0.3 ⎯
VCC +0.3 V
P10 to P12,
P15, P17,
P20 to P27,
P40 to P43,
P50 to P57,
PB4 to PB7
VCC = 4.0 V to 5.5 V 0.7 VCC
⎯
VCC +0.3 V
0.8 VCC
⎯
VCC +0.3
RES,
WKP0 to WKP7,
IRQ0, IRQ1,
IRQ3, IRQ4,
TMIB, TMIF,
TEST2, FWE,
SCK3, ADTRG
VCC = 4.0 V to 5.5 V –0.3
⎯
0.2 VCC
–0.3
⎯
0.1 VCC
RXD
VCC = 4.0 V to 5.5 V –0.3
⎯
0.3 VCC
–0.3
⎯
0.2 VCC
OSC1
VCC = 4.0 V to 5.5 V –0.3
⎯
0.5
–0.3
⎯
0.3
X1
Input low
voltage
Min
Rev.3.00 Jul. 19, 2007 page 426 of 532
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V
V
16. Electrical Characteristics (H8/3854 Group)
Values
Item
Symbol Applicable Pins
Input low
voltage
VIL
Output high
voltage
Output low
voltage
VOH
VOL
Test Conditions
Min
Typ
Max
Unit Notes
–0.3
⎯
0.3
V
P10 to P12,
P15, P17,
P20 to P27,
P40 to P43,
P50 to P57,
PB4 to PB7
VCC = 4.0 V to 5.5 V –0.3
⎯
0.3 VCC
V
–0.3
⎯
0.2 VCC
P10 to P12,
P15, P17,
P20 to P27,
P40 to P42,
P50 to P57
VCC = 4.0 V to 5.5 V VCC –1.0 ⎯
–IOH = 1.0 mA
⎯
VCC = 4.0 V to 5.5 V VCC –0.5 ⎯
–IOH = 0.5 mA
⎯
VCC –0.5 ⎯
⎯
P10 to P12,
P15, P17,
P40 to P42,
P50 to P57
VCC = 4.0 V to 5.5 V ⎯
IOL= 1.6 mA
⎯
0.6
⎯
⎯
0.5
P20 to P27
VCC = 4.0 V to 5.5 V ⎯
IOL= 10 mA
⎯
1.5
VCC = 4.0 V to 5.5 V ⎯
IOL= 1.6 mA
⎯
0.6
IOL= 0.4 mA
⎯
⎯
0.5
⎯
1.0
X1
–IOH = 0.1 mA
IOL= 0.4 mA
V
V
Input/output ⏐IIL⏐
leakage
current
RES, TEST2,
FWE, OSC1,
P10 to P12,
P15, P17,
P20 to P27,
P40 to P43,
P50 to P57,
PB4 to PB7
Vin = 0.5 V to
VCC – 0.5 V
⎯
Pull-up MOS –Ip
current
P10 to P12,
P15, P17,
P50 to P57
VCC = 5 V, Vin= 0 V
50.0
⎯
300.0
μA
VCC = 3.3 V,
Vin = 0 V
⎯
100
⎯
μA
Input
Cin
capacitance
All input pins except f = 1 MHz, Vin = 0 V, ⎯
power supply pins
Ta = 25°C
⎯
15.0
pF
μA
Reference
values
Rev.3.00 Jul. 19, 2007 page 427 of 532
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16. Electrical Characteristics (H8/3854 Group)
Values
Item
Test Conditions
Min
Typ
Max
Unit Notes
Active mode IOPE1
current
dissipation
Symbol Applicable Pins
VCC
Active mode
(high speed)
VCC = 5 V,
fOSC = 10 MHz
A/D not used
⎯
10.0
15.0
mA
*
2
*
IOPE3
VCC
Active mode
(high speed)
VCC = 5 V,
fOSC = 10 MHz
A/D operating
⎯
⎯
16.5
mA
*
2
*
IOPE2
VCC
Active mode
(medium speed)
VCC = 5 V,
fOSC = 10 MHz
A/D not used
⎯
2.0
3.5
mA
*
2
*
Sleep mode ISLEEP
current
dissipation
VCC
VCC = 5 V,
fOSC = 10 MHz
A/D not used
⎯
4.3
7.0
mA
*
2
*
Subactive
ISUB
mode current
dissipation
VCC
VCC = 5.0 V,
LCD on, 32-kHz
crystal oscillator
used (φSUB= φW/2)
⎯
80
160
μA
*
2
*
5
*
VCC = 5.0 V,
LCD on, 32-kHz
crystal oscillator
used (φSUB= φW/8)
⎯
70
⎯
μA
*
2
*
5
*
Reference
values
VCC = 3.3 V,
⎯
LCD not used, 32kHz crystal oscillator
used (φSUB= φW/2)
20
⎯
μA
*
2
*
Reference
values
1
1
1
1
1
1
1
Subsleep
ISUBSP
mode current
dissipation
VCC
VCC = 5.0 V,
LCD on, 32-kHz
crystal oscillator
used (φSUB= φW/2)
⎯
50
100
μA
*
2
*
5
*
Watch mode IWATCH
current
dissipation
VCC
VCC = 5.0 V,
LCD on, 32-kHz
crystal oscillator
used
⎯
40
80
μA
*
2
*
5
*
VCC = 3.3 V,
LCD not used,
32-kHz crystal
oscillator used
⎯
7.0
15.0
μA
*
2
*
32-kHz crystal
oscillator not used
⎯
⎯
5.0
μA
*
2
*
Standby
ISTBY
mode current
dissipation
VCC
Rev.3.00 Jul. 19, 2007 page 428 of 532
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1
1
1
16. Electrical Characteristics (H8/3854 Group)
Values
Item
Symbol Applicable Pins
IFLASH
Program/
erase current
dissipation
VCC
VRAM
VCC
RAM data
retaining
voltage
Test Conditions
Min
Typ
Max
Unit Notes
0°C ≤ Ta ≤ 70°C
fOSC = 12 MHz
⎯
16
22
mA
*
2
*
3
*
2.0
⎯
⎯
V
*
2
*
1
1
Notes: 1. Pin states during current measurement
Mode
Internal State
Pins
Oscillator Pins
Active mode (high and
medium speed)
Operates
VCC
System clock oscillator: Crystal
Subclock oscillator: Pin X1 = VCC
Sleep mode
Only timer operates
VCC
Subactive mode
Operates
VCC
Subsleep mode
Only timer operates,
CPU stops
VCC
Watch mode
Only time-base clock
operates, CPU stops
VCC
Standby mode
CPU and timers all stop
VCC
System clock oscillator: Crystal
Subclock oscillator: Pin X1 = VCC
Programming/
3
erasing*
Operates
VCC
System clock oscillator: Crystal
Subclock oscillator: Pin X1 = VCC
System clock oscillator: Crystal
Subclock oscillator: Crystal
2. Excludes current in pull-up MOS transistors and output buffers.
3. Applies to F-ZTAT version only.
4. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
5. When power is supplied to the built-in bleeder resistances from VCC (LPS0 = LPS1 = 1
in LR2).
Rev.3.00 Jul. 19, 2007 page 429 of 532
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16. Electrical Characteristics (H8/3854 Group)
Table 16.3 DC Characteristics of H8/3852, H8/3853, and H8/3854 (2)
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F, VSS = 0.0 V, Ta = –20°C to +75°C*2, including subactive mode,
unless otherwise specified.
Values
Item
Symbol Applicable Pins
Test Conditions
Min
Typ
Max
Unit
Notes
Allowable
output low
current
(per pin)
IOL
Output pins except
in port 2
VCC = 4.0 V to 5.5 V
⎯
⎯
2.0
mA
*
Port 2
VCC = 4.0 V to 5.5 V
⎯
⎯
10.0
⎯
⎯
0.5
mA
*
mA
*
mA
*
All output pins
Allowable
ΣIOL
output low
current (total)
Output pins except
in port 2
VCC = 4.0 V to 5.5 V
⎯
⎯
20.0
Port 2
VCC = 4.0 V to 5.5 V
⎯
⎯
80.0
⎯
⎯
20.0
⎯
⎯
2.0
⎯
⎯
0.2
⎯
⎯
10.0
⎯
⎯
8.0
All output pins
Allowable
output high
current
(per pin)
–IOH
Σ–IOH
Allowable
output high
current (total)
All output pins
All output pins
VCC = 4.0 V to 5.5 V
VCC = 4.0 V to 5.5 V
1
1
1
1
Notes: 1. Excludes LCD output pins.
2. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 430 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.2.3
AC Characteristics
Table 16.4 shows the control signal timing, and table 16.5 shows the serial interface timing, of the
H8/3852, H8/3853, and H8/3854.
Table 16.4 Control Signal Timing of H8/3852, H8/3853, and H8/3854
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F, VSS = 0.0 V, Ta = –20°C to +75°C*3, including subactive mode,
unless otherwise specified.
Item
Applicable
Symbol Pins
System clock
fOSC
oscillation frequency
OSC1, OSC2
OSC clock (φOSC)
cycle time
tOSC
OSC1, OSC2
System clock (φ)
cycle time
tcyc
Values
Test Conditions
Min
Typ
Max
Reference
Unit Figure
MHz
VCC = 4.0 V to 5.5 V 2.0
⎯
10.0
2.0
⎯
5.0
VCC = 4.0 V to 5.5 V 100.0
⎯
1000.0 ns
*
200.0
⎯
1000.0
Figure 16.1
2
⎯
16
⎯
⎯
2000.0 ns
tOSC
Subclock oscillation fW
frequency
X1, X2
⎯
32.768 ⎯
Watch clock (φW)
cycle time
tW
X1, X2
⎯
30.5
⎯
μs
Subclock (φSUB)
cycle time
tsubcyc
2
⎯
8
tW
2
⎯
⎯
tcyc
tsubcyc
ms
Instruction cycle time
1
*
kHz
2
*
VCC = 4.0 V to 5.5 V 40.0
⎯
⎯
60.0
⎯
⎯
2
⎯
⎯
s
VCC = 4.0 V to 5.5 V 40.0
⎯
⎯
ns
Figure 16.1
80.0
⎯
⎯
VCC = 4.0 V to 5.5 V 40.0
⎯
⎯
ns
Figure 16.1
⎯
⎯
⎯
15.0
ns
Figure 16.1
⎯
⎯
20.0
VCC = 4.0 V to 5.5 V ⎯
⎯
15.0
ns
Figure 16.1
⎯
20.0
Oscillation
stabilization time
(crystal oscillator)
trc
Oscillation
stabilization time
trc
X1, X2
External clock high
width
tCPH
OSC1
External clock low
width
tCPL
OSC1
80.0
External clock rise
time
tCPr
OSC1
VCC = 4.0 V to 5.5 V ⎯
External clock fall
time
tCPf
OSC1
⎯
OSC1, OSC2
1
Rev.3.00 Jul. 19, 2007 page 431 of 532
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16. Electrical Characteristics (H8/3854 Group)
Item
Applicable
Symbol Pins
Values
Test Conditions
Min
Typ
Max
Reference
Unit Figure
External subclock
high width
tXH
X1
0.4/fx
⎯
⎯
s
Figure 16.2
External subclock
low width
tXL
X1
0.4/fx
⎯
⎯
s
Figure 16.2
External subclock
rise time
tXr
X1
⎯
⎯
100.0
ns
Figure 16.2
External subclock
fall time
tXf
X1
⎯
⎯
100.0
ns
Figure 16.2
RES pin low width
tREL
RES
10
⎯
⎯
tcyc
Figure 16.3
Input pin high width
tIH
IRQ0, IRQ1,
IRQ3, IRQ4,
WKP0 to WKP7,
ADTRG, TMIB,
TMIF
2
⎯
⎯
tcyc Figure 16.4
tsubcyc
Input pin low width
tIL
IRQ0, IRQ1,
IRQ3, IRQ4,
WKP0 to WKP7,
ADTRG, TMIB,
TMIF
2
⎯
⎯
tcyc Figure 16.4
tsubcyc
Notes: 1. A frequency between 1 MHz and 10 MHz is required when an external clock is input.
2. Selected with bits SA1 and SA0 in system control register 2 (SYSCR2).
3. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 432 of 532
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16. Electrical Characteristics (H8/3854 Group)
Table 16.5 Serial Interface (SCI3) Timing of H8/3852, H8/3853, and H8/3854
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F, VSS = 0.0 V, Ta = –20°C to +75°C*, unless otherwise specified.
Values
Min
Typ
Max
Unit
Reference
Figure
Input clock Asynchronous tScyc
cycle
Synchronous
4
⎯
⎯
tcyc
Figure 16.5
6
⎯
⎯
Input clock pulse width
tSCKW
0.4
⎯
0.6
tScyc
Figure 16.5
Transmit data delay time
(synchronous mode)
tTXD
VCC = 4.0 V to 5.5 V ⎯
⎯
1
tcyc
Figure 16.6
⎯
⎯
1
Receive data setup time
(synchronous mode)
tRXS
ns
Figure 16.6
Receive data hold time
(synchronous mode)
tRXH
ns
Figure 16.6
Item
Symbol Test Conditions
VCC = 4.0 V to 5.5 V 200.0 ⎯
⎯
400.0 ⎯
⎯
VCC = 4.0 V to 5.5 V 200.0 ⎯
⎯
400.0 ⎯
⎯
Note: * The guaranteed temperature as an electrical characteristic for die type products is 75°C.
Rev.3.00 Jul. 19, 2007 page 433 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.2.4
A/D Converter Characteristics
Table 16.6 shows the A/D converter characteristics of the H8/3852, H8/3853, and H8/3854.
Table 16.6 A/D Converter Characteristics of H8/3852, H8/3853, and H8/3854
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F, VSS = 0.0 V, Ta = –20°C to +75°C*, unless otherwise specified.
Applicable
Item
Symbol Pins
Values
Test
Conditions
Reference
Min
Typ
Max
Unit Figure
Analog input voltage AVIN
AN4 to AN7
VSS –0.3
⎯
VCC +0.3
V
Analog input
capacitance
CAIN
AN4 to AN7
⎯
⎯
30.0
pF
Allowable signal
source impedance
RAIN
⎯
⎯
5.0
kΩ
Resolution (data
length)
⎯
⎯
8
Bit
Non-linearity error
⎯
⎯
±2.0
LSB
Quantization error
⎯
⎯
±0.5
LSB
Absolute accuracy
⎯
⎯
±2.5
LSB
Conversion time
12.4
⎯
124
μs
Note:
*
The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 434 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.2.5
LCD Characteristics
Table 16.7 shows the LCD characteristics of the H8/3852, H8/3853, and H8/3854.
Table 16.7 LCD Characteristics of H8/3852, H8/3853, and H8/3854
VCC = 2.7 V to 5.5 V of the mask ROM version of H8/3852, H8/3853, and H8/3854,
VCC = 3.0 V to 5.5 V of H8/3854F, VSS = 0.0 V, Ta = –20°C to +75°C*2, including subactive mode,
unless otherwise specified.
Values
Item
Symbol Applicable Pins Test Conditions Min
Typ
Max Unit Notes
Common driver
on-resistance
RCOM
COM1 to COM16 ±Id = 0.05 mA,
VCC = 4 V
⎯
6
20
kΩ
*1
Segment driver
on-resistance
RSEG
SEG1 to SEG40 ±Id = 0.05 mA,
VCC = 4 V
⎯
6
20
kΩ
*1
LCD power
supply bleeder
resistance
RLCD
VCC = 5.0 V,
fx = 32.768 kHz
200
400
700
kΩ
Notes: 1. Applies to the resistance (RCOM) between the V1OUT, V2OUT, V5OUT, and VSS pins and
the common signal pins (COM1 to COM16), and the resistance (RSEG) between the
V1OUT, V3OUT, V4OUT, and VSS pins and the segment signal pins (SEG1 to SEG40),
when Id is flowing in the pins.
The voltage applied to V1OUT through V5OUT must not exceed VCC.
2. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 435 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.2.6
Flash Memory Characteristics
Table 16.8 shows the flash memory characteristics.
Table 16.8 Flash Memory Characteristics
Conditions: VCC = 4.5 V to 5.5 V, VSS = 0.0 V, Ta = 0°C to +75°C
(program/erase operating temperature range)
Item
1 2 4
Programming time* * *
1 3 5
Erase time* * *
Min
Typ Max Unit
tP
⎯
10
200
ms/32 bytes
tE
⎯
100
300
ms/block
Times
NWEC
⎯
⎯
100
Wait time after SWE bit setting*
x
10
⎯
⎯
μs
1
y
50
⎯
⎯
μs
Wait time after P bit setting* *
z
⎯
⎯
200
μs
1
α
10
⎯
⎯
μs
β
10
⎯
⎯
μs
Rewrite times
Programming
Symbol
1
Wait time after PSU bit setting*
1 4
Wait time after P bit clearing*
1
Wait time after PSU bit clearing*
γ
4
⎯
⎯
μs
Wait time after H'FF dummy write* ε
2
⎯
⎯
μs
η
4
⎯
⎯
μs
N
⎯
⎯
1000 Times
x
10
⎯
⎯
1
Wait time after PV bit setting*
1
1
Wait time after PV bit clearing*
1 4
Maximum number of writes* *
Erasing
1
Wait time after SWE bit setting*
1
Wait time after ESU bit setting*
1 5
Wait time after E bit setting* *
1
Wait time after E bit clearing*
1
Wait time after ESU bit clearing*
1
Wait time after EV bit setting*
μs
y
200
⎯
⎯
μs
z
⎯
⎯
5
ms
α
10
⎯
⎯
μs
β
10
⎯
⎯
μs
γ
20
⎯
⎯
μs
Wait time after H'FF dummy write* ε
2
⎯
⎯
μs
1
η
5
⎯
⎯
μs
1 5
N
⎯
⎯
60
Times
1
Wait time after EV bit clearing*
Maximum number of erases* *
Test
Conditions
Notes: 1. Follow the program/erase algorithms when making the time settings.
2. Programming time per 32 bytes. (Indicates the total time during which the P bit is set in
flash memory control register 1 (FLMCR1). Does not include the program-verify time.)
3. Time to erase one block. (Indicates the time during which the E bit is set in FLMCR1.
Does not include the erase-verify time.)
4. Maximum programming time
(tP(max) = Wait time after P bit setting (z) × maximum number of writes (N))
5. Maximum erase time
(tE(max) = Wait time after E bit setting (z) × maximum number of erases (N))
Rev.3.00 Jul. 19, 2007 page 436 of 532
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16. Electrical Characteristics (H8/3854 Group)
16.3
Operation Timing
Figures 16.1 to 16.6 show timing diagrams.
tOSC
VIH
VIL
OSC1
tCPH
tCPL
tCPr
tCPf
Figure 16.1 System Clock Input Timing
VIH
VIL
X1
tXH
tXL
tXr
tXf
Figure 16.2 Subclock Input Timing
RES
VIL
tREL
Figure 16.3 RES Pin Low Width Timing
IRQ0, IRQ1, IRQ3, IRQ4,
WKP0 to WKP7, ADTRG,
TMIB, TMIF
VIH
VIL
tIL
tIH
Figure 16.4 Input Timing
tSCKW
SCK3
tScyc
Figure 16.5 SCK3 Input Clock Timing
Rev.3.00 Jul. 19, 2007 page 437 of 532
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16. Electrical Characteristics (H8/3854 Group)
tScyc
SCK3
VIH or VOH*
VIL or VOL*
tTXD
VOH*
VOL*
TXD
(transmit data)
tRXS
tRXH
RXD
(receive data)
Note: * Output timing reference levels
Output high
Output low
VOH = 2.0 V
VOL = 0.8 V
Load conditions are shown in figure 16.7.
Figure 16.6 SCK3 Input/Output Timing in Synchronous Mode
16.4
Output Load Circuit
VCC
2.4 kΩ
LSI Chip output pin
30 pF
12 kΩ
Figure 16.7 Output Load Conditions
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16. Electrical Characteristics (H8/3854 Group)
16.5
Usage Note
Although both the F-ZTAT and mask ROM versions fully meet the electrical specifications listed
in this manual, there may be differences in the actual values of the electrical characteristics,
operating margins, noise margins, and so forth, due to differences in the fabrication process, the
on-chip ROM, and the layout patterns.
If the F-ZTAT version is used to carry out system evaluation and testing, therefore, when
switching to the mask ROM version the same evaluation and testing procedures should also be
conducted on the mask ROM version.
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16. Electrical Characteristics (H8/3854 Group)
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Appendix A CPU Instruction Set
Appendix A CPU Instruction Set
A.1
Instructions
Operation Notation
Symbol
Description
Rd8/16
General register (destination) (8 or 16 bits)
Rs8/16
General register (source) (8 or 16 bits)
Rn8/16
General register (8 or 16 bits)
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
#xx: 3/8/16
Immediate data (3, 8, or 16 bits)
d: 8/16
Displacement (8 or 16 bits)
@aa: 8/16
Absolute address (8 or 16 bits)
+
Addition
–
Subtraction
×
Multiplication
÷
Division
∧
Logical AND
∨
Logical OR
⊕
Exclusive logical OR
→
Move
—
Logical complement
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Appendix A CPU Instruction Set
Condition Code Notation
Symbol
Description
Modified according to the instruction result
*
Not fixed (value not guaranteed)
0
Always cleared to 0
⎯
Not affected by the instruction execution result
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Appendix A CPU Instruction Set
Instruction Set
MOV.B #xx:8, Rd
B #xx:8 → Rd8
MOV.B Rs, Rd
B Rs8 → Rd8
2
2
Implied
@@aa
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Rn
Operation
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
Condition Code
I
H N Z V C
No. of States
Table A.1
⎯ ⎯
0 ⎯ 2
⎯ ⎯
0 ⎯ 2
⎯ ⎯
0 ⎯ 4
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
MOV.B @Rs, Rd
B @Rs16 → Rd8
MOV.B @(d:16, Rs), Rd
B @(d:16, Rs16)→ Rd8
MOV.B @Rs+, Rd
B @Rs16 → Rd8
Rs16+1 → Rs16
MOV.B @aa:8, Rd
B @aa:8 → Rd8
2
⎯ ⎯
0 ⎯ 4
MOV.B @aa:16, Rd
B @aa:16 → Rd8
4
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 4
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
2
⎯ ⎯
0 ⎯ 4
4
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 4
⎯ ⎯
0 ⎯ 2
⎯ ⎯
0 ⎯ 4
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 4
MOV.B Rs, @Rd
B Rs8 → @Rd16
MOV.B Rs, @(d:16, Rd)
B Rs8 → @(d:16, Rd16)
MOV.B Rs, @–Rd
B Rd16–1 → Rd16
Rs8 → @Rd16
MOV.B Rs, @aa:8
B Rs8 → @aa:8
MOV.B Rs, @aa:16
B Rs8 → @aa:16
MOV.W #xx:16, Rd
W #xx:16 → Rd
MOV.W Rs, Rd
W Rs16 → Rd16
MOV.W @Rs, Rd
W @Rs16 → Rd16
2
4
2
2
4
2
4
2
2
MOV.W @(d:16, Rs), Rd W @(d:16, Rs16) → Rd16
MOV.W @Rs+, Rd
W @Rs16 → Rd16
Rs16+2 → Rs16
MOV.W @aa:16, Rd
W @aa:16 → Rd16
MOV.W Rs, @Rd
W Rs16 → @Rd16
MOV.W Rs, @(d:16, Rd) W Rs16 → @(d:16, Rd16)
MOV.W Rs, @–Rd
W Rd16–2 → Rd16
Rs16 → @Rd16
MOV.W Rs, @aa:16
W Rs16 → @aa:16
POP Rd
W @SP → Rd16
SP+2 → SP
4
2
4
2
4
2
4
2
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
⎯ ⎯
0 ⎯ 6
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Appendix A CPU Instruction Set
PUSH Rs
W SP–2 → SP
Rs16 → @SP
ADD.B #xx:8, Rd
B Rd8+#xx:8 → Rd8
ADD.B Rs, Rd
B Rd8+Rs8 → Rd8
ADD.W Rs, Rd
W Rd16+Rs16 → Rd16
ADDX.B #xx:8, Rd
B Rd8+#xx:8 +C → Rd8
ADDX.B Rs, Rd
B Rd8+Rs8 +C → Rd8
ADDS.W #1, Rd
ADDS.W #2, Rd
INC.B Rd
2
2
2
2
Condition Code
I
H N Z V C
⎯ ⎯
No. of States
Implied
@@aa
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Rn
Operation
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
0 ⎯ 6
⎯
2
⎯
2
⎯ (1)
2
⎯
(2)
2
2
⎯
(2)
2
W Rd16+1 → Rd16
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
W Rd16+2 → Rd16
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
B Rd8+1 → Rd8
2
⎯ ⎯
⎯ 2
DAA.B Rd
B Rd8 decimal adjust → Rd8
2
⎯ *
* (3) 2
SUB.B Rs, Rd
B Rd8–Rs8 → Rd8
2
⎯
SUB.W Rs, Rd
W Rd16–Rs16 → Rd16
2
⎯ (1)
SUBX.B #xx:8, Rd
B Rd8–#xx:8 –C → Rd8
SUBX.B Rs, Rd
B Rd8–Rs8 –C → Rd8
SUBS.W #1, Rd
SUBS.W #2, Rd
2
2
2
⎯
(2)
2
2
⎯
(2)
2
W Rd16–1 → Rd16
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
W Rd16–2 → Rd16
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
DEC.B Rd
B Rd8–1 → Rd8
2
⎯ ⎯
⎯ 2
DAS.B Rd
B Rd8 decimal adjust → Rd8
2
⎯ *
* ⎯ 2
NEG.B Rd
B 0–Rd → Rd
2
⎯
2
CMP.B #xx:8, Rd
B Rd8–#xx:8
⎯
2
CMP.B Rs, Rd
B Rd8–Rs8
2
⎯
2
CMP.W Rs, Rd
W Rd16–Rs16
2
⎯ (1)
2
MULXU.B Rs, Rd
B Rd8 × Rs8 → Rd16
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 14
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2
2
Appendix A CPU Instruction Set
DIVXU.B Rs, Rd
B Rd16÷Rs8 → Rd16 (RdH:
remainder, RdL: quotient)
AND.B #xx:8, Rd
B Rd8∧#xx:8 → Rd8
AND.B Rs, Rd
B Rd8∧Rs8 → Rd8
2
2
2
Condition Code
I
H N Z V C
No. of States
Implied
@@aa
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Operation
Rn
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
⎯ ⎯ (5) (6) ⎯ ⎯ 14
⎯ ⎯
0 ⎯ 2
⎯ ⎯
0 ⎯ 2
⎯ ⎯
0 ⎯ 2
⎯ ⎯
0 ⎯ 2
OR.B #xx:8, Rd
B Rd8∨#xx:8 → Rd8
OR.B Rs, Rd
B Rd8∨Rs8 → Rd8
XOR.B #xx:8, Rd
B Rd8⊕#xx:8 → Rd8
⎯ ⎯
0 ⎯ 2
XOR.B Rs, Rd
B Rd8⊕Rs8 → Rd8
2
⎯ ⎯
0 ⎯ 2
NOT.B Rd
B Rd → Rd
2
⎯ ⎯
0 ⎯ 2
SHAL.B Rd
B
2
⎯ ⎯
2
2
⎯ ⎯
0
2
2
⎯ ⎯
0
2
2
⎯ ⎯ 0
0
2
2
⎯ ⎯
0
2
2
⎯ ⎯
0
2
2
⎯ ⎯
0
2
2
⎯ ⎯
0
2
B
SHLL.B Rd
B
ROTXL.B Rd
B
b0
C
b0
C
0
b7
B
2
0
b7
SHLR.B Rd
2
C
b7
SHAR.B Rd
2
b0
0
C
b7
b0
C
b7
ROTXR.B Rd
b0
B
b7
ROTL.B Rd
B
ROTR.B Rd
B
b0
C
C
b7
b0
C
b7
b0
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Appendix A CPU Instruction Set
BSET #xx:3, Rd
B (#xx:3 of Rd8) ← 1
BSET #xx:3, @Rd
B (#xx:3 of @Rd16) ← 1
BSET #xx:3, @aa:8
B (#xx:3 of @aa:8) ← 1
BSET Rn, Rd
B (Rn8 of Rd8) ← 1
BSET Rn, @Rd
B (Rn8 of @Rd16) ← 1
BSET Rn, @aa:8
B (Rn8 of @aa:8) ← 1
BCLR #xx:3, Rd
B (#xx:3 of Rd8) ← 0
BCLR #xx:3, @Rd
B (#xx:3 of @Rd16) ← 0
BCLR #xx:3, @aa:8
B (#xx:3 of @aa:8) ← 0
BCLR Rn, Rd
B (Rn8 of Rd8) ← 0
BCLR Rn, @Rd
B (Rn8 of @Rd16) ← 0
BCLR Rn, @aa:8
B (Rn8 of @aa:8) ← 0
BNOT #xx:3, Rd
B (#xx:3 of Rd8) ←
(#xx:3 of Rd8)
BNOT #xx:3, @Rd
B (#xx:3 of @Rd16) ←
(#xx:3 of @Rd16)
BNOT #xx:3, @aa:8
B (#xx:3 of @aa:8) ←
(#xx:3 of @aa:8)
BNOT Rn, Rd
B (Rn8 of Rd8) ←
(Rn8 of Rd8)
BNOT Rn, @Rd
B (Rn8 of @Rd16) ←
(Rn8 of @Rd16)
BNOT Rn, @aa:8
B (Rn8 of @aa:8) ←
(Rn8 of @aa:8)
BTST #xx:3, Rd
B (#xx:3 of Rd8) → Z
BTST #xx:3, @Rd
B (#xx:3 of @Rd16) → Z
BTST #xx:3, @aa:8
B (#xx:3 of @aa:8) → Z
BTST Rn, Rd
B (Rn8 of Rd8) → Z
BTST Rn, @Rd
B (Rn8 of @Rd16) → Z
BTST Rn, @aa:8
B (Rn8 of @aa:8) → Z
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Condition Code
I
H N Z V C
No. of States
Implied
@@aa
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Rn
Operation
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
2
4
4
2
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯
⎯ ⎯ 2
⎯ ⎯ ⎯
⎯ ⎯ 6
⎯ ⎯ ⎯
⎯ ⎯ 6
⎯ ⎯ ⎯
⎯ ⎯ 2
⎯ ⎯ ⎯
⎯ ⎯ 6
⎯ ⎯ ⎯
⎯ ⎯ 6
Appendix A CPU Instruction Set
BLD #xx:3, Rd
B (#xx:3 of Rd8) → C
BLD #xx:3, @Rd
B (#xx:3 of @Rd16) → C
BLD #xx:3, @aa:8
B (#xx:3 of @aa:8) → C
BILD #xx:3, Rd
B (#xx:3 of Rd8) → C
BILD #xx:3, @Rd
B (#xx:3 of @Rd16) → C
BILD #xx:3, @aa:8
B (#xx:3 of @aa:8) → C
BST #xx:3, Rd
B C → (#xx:3 of Rd8)
BST #xx:3, @Rd
B C → (#xx:3 of @Rd16)
BST #xx:3, @aa:8
B C → (#xx:3 of @aa:8)
BIST #xx:3, Rd
B C → (#xx:3 of Rd8)
BIST #xx:3, @Rd
B C → (#xx:3 of @Rd16)
BIST #xx:3, @aa:8
B C → (#xx:3 of @aa:8)
BAND #xx:3, Rd
B C∧(#xx:3 of Rd8) → C
BAND #xx:3, @Rd
B C∧(#xx:3 of @Rd16) → C
BAND #xx:3, @aa:8
B C∧(#xx:3 of @aa:8) → C
BIAND #xx:3, Rd
B C∧(#xx:3 of Rd8) → C
BIAND #xx:3, @Rd
B C∧(#xx:3 of @Rd16) → C
BIAND #xx:3, @aa:8
B C∧(#xx:3 of @aa:8) → C
BOR #xx:3, Rd
B C∨(#xx:3 of Rd8) → C
BOR #xx:3, @Rd
B C∨(#xx:3 of @Rd16) → C
BOR #xx:3, @aa:8
B C∨(#xx:3 of @aa:8) → C
BIOR #xx:3, Rd
B C∨(#xx:3 of Rd8) → C
BIOR #xx:3, @Rd
B C∨(#xx:3 of @Rd16) → C
BIOR #xx:3, @aa:8
B C∨(#xx:3 of @aa:8) → C
BXOR #xx:3, Rd
B C⊕(#xx:3 of Rd8) → C
BXOR #xx:3, @Rd
B C⊕(#xx:3 of @Rd16) → C
BXOR #xx:3, @aa:8
B C⊕(#xx:3 of @aa:8) → C
BIXOR #xx:3, Rd
B C⊕(#xx:3 of Rd8) → C
2
4
4
2
4
4
I
H N Z V C
No. of States
Implied
@@aa
Condition Code
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
4
4
2
4
4
2
4
4
2
4
4
2
4
4
2
4
4
2
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Rn
Operation
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
2
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
2
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Appendix A CPU Instruction Set
BIXOR #xx:3, @Rd
B C⊕(#xx:3 of @Rd16) → C
4
Condition Code
I
H N Z V C
No. of States
Implied
@@aa
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Rn
Branching
Condition
Operation
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
⎯ ⎯ ⎯ ⎯ ⎯
6
⎯ ⎯ ⎯ ⎯ ⎯
6
BIXOR #xx:3, @aa:8
B C⊕(#xx:3 of @aa:8) → C
BRA d:8 (BT d:8)
⎯ PC ← PC+d:8
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BRN d:8 (BF d:8)
⎯ PC ← PC+2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BHI d:8
⎯ If
C∨Z=0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BLS d:8
⎯ condition
C∨Z=1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BCC d:8 (BHS d:8)
⎯ is true
C=0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BCS d:8 (BLO d:8)
⎯ then
C=1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BNE d:8
⎯ PC ←
Z=0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BEQ d:8
⎯ PC+d:8
Z=1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BVC d:8
⎯ else next;
V=0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BVS d:8
⎯
V=1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BPL d:8
⎯
N=0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BMI d:8
⎯
N=1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BGE d:8
⎯
N⊕V = 0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BLT d:8
⎯
N⊕V = 1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BGT d:8
⎯
Z ∨ (N⊕V) = 0
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
BLE d:8
⎯
Z ∨ (N⊕V) = 1
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
JMP @Rn
⎯ PC ← Rn16
JMP @aa:16
⎯ PC ← aa:16
JMP @@aa:8
⎯ PC ← @aa:8
BSR d:8
⎯ SP–2 → SP
PC → @SP
PC ← PC+d:8
JSR @Rn
⎯ SP–2 → SP
PC → @SP
PC ← Rn16
JSR @aa:16
⎯ SP–2 → SP
PC → @SP
PC ← aa:16
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4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 4
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 6
4
2
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 6
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 6
2
4
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
Appendix A CPU Instruction Set
Condition Code
I
H N Z V C
No. of States
Implied
@@aa
@(d:8, PC)
@aa: 8/16
@–Rn/@Rn+
@(d:16, Rn)
@Rn
Rn
Operation
#xx: 8/16
Mnemonic
Operand Size
Addressing Mode/
Instruction Length (Bytes)
JSR @@aa:8
⎯ SP–2 → SP
PC → @SP
PC ← @aa:8
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
RTS
⎯ PC ← @SP
SP+2 → SP
2 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 8
RTE
⎯ CCR ← @SP
SP+2 → SP
PC ← @SP
SP+2 → SP
2
SLEEP
⎯ Transit to power-down
state
2 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
2
10
LDC #xx:8, CCR
B #xx:8 → CCR
LDC Rs, CCR
B Rs8 → CCR
2
2
STC CCR, Rd
B CCR → Rd8
2
⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
ANDC #xx:8, CCR
B CCR∧#xx:8 → CCR
2
2
ORC #xx:8, CCR
B CCR∨#xx:8 → CCR
2
2
XORC #xx:8, CCR
B CCR⊕#xx:8 → CCR
2
NOP
⎯ PC ← PC+2
2 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 2
EEPMOV
⎯ if R4L ≠ 0
Repeat @R5 → @R6
R5+1 → R5
R6+1 → R6
R4L–1 → R4L
Until R4L = 0
else next;
4 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ (4)
2
2
2
Notes: (1) Set to 1 when there is a carry or borrow from bit 11; otherwise cleared to 0.
(2) If the result is zero, the previous value of the flag is retained; otherwise the flag is
cleared to 0.
(3) Set to 1 if decimal adjustment produces a carry; otherwise retains value prior to
arithmetic operation.
(4) The number of states required for execution is 4n + 9 (n = value of R4L).
(5) Set to 1 if the divisor is negative; otherwise cleared to 0.
(6) Set to 1 if the divisor is zero; otherwise cleared to 0.
Rev.3.00 Jul. 19, 2007 page 449 of 532
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Appendix A CPU Instruction Set
A.2
Operation Code Map
Table A.2 is an operation code map. It shows the operation codes contained in the first byte of the
instruction code (bits 15 to 8 of the first instruction word).
Instruction when first bit of byte 2 (bit 7 of first instruction word) is 0.
Instruction when first bit of byte 2 (bit 7 of first instruction word) is 1.
Rev.3.00 Jul. 19, 2007 page 450 of 532
REJ09B0397-0300
BIAND
BAND
RTE
BNE
AND
ANDC
6
BILD
BIST
BLD
BST
BEQ
MOV
NEG
NOT
LDC
7
8
BVC
OR
XOR
AND
MOV
C
D
E
F
SUB
ADD
MOV
BVS
9
JMP
BPL
DEC
INC
A
Note: * The PUSH and POP instructions are identical in machine language to MOV instructions.
SUBX
B
CMP
BIXOR
BXOR
BSR
BCS
XOR
XORC
5
A
BIOR
BOR
RTS
BCC
OR
ORC
4
ADDX
BTST
BLS
ROTR
ROTXR
LDC
3
9
BCLR
BHI
ROTL
ROTXL
STC
2
ADD
BNOT
DIVXU
BRN
SHAR
SHLR
SLEEP
1
8
7
BSET
MULXU
5
6
BRA
SHAL
SHLL
NOP
0
4
3
Low
C
CMP
MOV
BLT
D
JSR
BGT
SUBX
ADDX
E
Bit-manipulation instructions
BGE
MOV *
EEPMOV
BMI
SUBS
ADDS
B
BLE
DAS
DAA
F
Table A.2
2
1
0
High
Appendix A CPU Instruction Set
Operation Code Map
Rev.3.00 Jul. 19, 2007 page 451 of 532
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Appendix A CPU Instruction Set
A.3
Number of Execution States
The tables here can be used to calculate the number of states required for instruction execution.
Table A.4 indicates the number of states required for each cycle (instruction fetch, data read/write,
etc.) in instruction execution, and table A.3 indicates the number of cycles of each type occurring
in each instruction. The total number of states required for execution of an instruction can be
calculated from these two tables as follows:
Execution states = I × SI + J × SJ + K × SK + L × SL + M × SM + N × SN
Examples: When instruction is fetched from on-chip ROM, and an on-chip RAM is accessed.
BSET #0, @FF00
From table A.4:
I = L = 2, J = K = M = N= 0
From table A.3:
SI = 2, SL = 2
Number of states required for execution = 2 × 2 + 2 × 2 = 8
When instruction is fetched from on-chip ROM, branch address is read from on-chip ROM, and
on-chip RAM is used for stack area.
JSR @@ 30
From table A.4:
I = 2, J = K = 1,
L=M=N=0
From table A.3:
SI = SJ = SK = 2
Number of states required for execution = 2 × 2 + 1 × 2 + 1 × 2 = 8
Rev.3.00 Jul. 19, 2007 page 452 of 532
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Appendix A CPU Instruction Set
Table A.3
Number of Cycles in Each Instruction
Access Location
Execution Status
(Instruction Cycle)
On-Chip Memory
On-Chip Peripheral Module
2
⎯
Instruction fetch
SI
Branch address read
SJ
Stack operation
SK
Byte data access
SL
2 or 3*
Word data access
SM
⎯
Internal operation
SN
Note:
*
1
Depends on which on-chip module is accessed. See section 2.9.1, Notes on Data
Access for details.
Rev.3.00 Jul. 19, 2007 page 453 of 532
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Appendix A CPU Instruction Set
Table A.4
Number of Cycles in Each Instruction
Instruction Mnemonic
Byte Data
Stack
Instruction Branch
Addr. Read Operation Access
Fetch
L
K
J
I
ADD
ADD.B #xx:8, Rd
1
ADD.B Rs, Rd
1
ADDS
ADDX
AND
ADD.W Rs, Rd
1
ADDS.W #1, Rd
1
ADDS.W #2, Rd
1
ADDX.B #xx:8, Rd
1
ADDX.B Rs, Rd
1
AND.B #xx:8, Rd
1
AND.B Rs, Rd
1
ANDC
ANDC #xx:8, CCR
1
BAND
BAND #xx:3, Rd
1
BAND #xx:3, @Rd
2
1
BAND #xx:3, @aa:8
2
1
BRA d:8 (BT d:8)
2
BRN d:8 (BF d:8)
2
BHI d:8
2
BLS d:8
2
BCC d:8 (BHS d:8)
2
Bcc
BCLR
BCS d:8 (BLO d:8)
2
BNE d:8
2
BEQ d:8
2
BVC d:8
2
BVS d:8
2
BPL d:8
2
BMI d:8
2
BGE d:8
2
BLT d:8
2
BGT d:8
2
BLE d:8
2
BCLR #xx:3, Rd
1
BCLR #xx:3, @Rd
2
2
BCLR #xx:3, @aa:8
2
2
BCLR Rn, Rd
1
Rev.3.00 Jul. 19, 2007 page 454 of 532
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Word Data Internal
Operation
Access
N
M
Appendix A CPU Instruction Set
Instruction Mnemonic
Byte Data
Stack
Instruction Branch
Addr. Read Operation Access
Fetch
L
K
J
I
BCLR
BCLR Rn, @Rd
2
2
BCLR Rn, @aa:8
2
2
BIAND #xx:3, Rd
1
BIAND #xx:3, @Rd
2
1
BIAND #xx:3, @aa:8 2
1
BIAND
BILD
BIOR
BIST
BIXOR
BLD
BNOT
BOR
BSET
BILD #xx:3, Rd
Word Data Internal
Operation
Access
N
M
1
BILD #xx:3, @Rd
2
1
BILD #xx:3, @aa:8
2
1
BIOR #xx:3, Rd
1
BIOR #xx:3, @Rd
2
1
BIOR #xx:3, @aa:8
2
1
BIST #xx:3, Rd
1
BIST #xx:3, @Rd
2
2
2
BIST #xx:3, @aa:8
2
BIXOR #xx:3, Rd
1
BIXOR #xx:3, @Rd
2
1
BIXOR #xx:3, @aa:8 2
1
BLD #xx:3, Rd
1
BLD #xx:3, @Rd
2
1
BLD #xx:3, @aa:8
2
1
BNOT #xx:3, Rd
1
BNOT #xx:3, @Rd
2
2
BNOT #xx:3, @aa:8
2
2
BNOT Rn, Rd
1
BNOT Rn, @Rd
2
2
BNOT Rn, @aa:8
2
2
BOR #xx:3, Rd
1
BOR #xx:3, @Rd
2
1
BOR #xx:3, @aa:8
2
1
BSET #xx:3, Rd
1
BSET #xx:3, @Rd
2
2
BSET #xx:3, @aa:8
2
2
BSET Rn, Rd
1
BSET Rn, @Rd
2
2
Rev.3.00 Jul. 19, 2007 page 455 of 532
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Appendix A CPU Instruction Set
Instruction Mnemonic
Byte Data
Stack
Instruction Branch
Addr. Read Operation Access
Fetch
L
K
J
I
BSET
BSET Rn, @aa:8
2
BSR
BSR d:8
2
BST
BTST
BXOR
CMP
BST #xx:3, Rd
1
2
2
BST #xx:3, @aa:8
2
2
BTST #xx:3, Rd
1
BTST #xx:3, @Rd
2
1
BTST #xx:3, @aa:8
2
1
BTST Rn, Rd
1
BTST Rn, @Rd
2
1
BTST Rn, @aa:8
2
1
BXOR #xx:3, Rd
1
BXOR #xx:3, @Rd
2
1
BXOR #xx:3, @aa:8 2
1
1
CMP. B Rs, Rd
1
CMP.W Rs, Rd
1
DAA
DAA.B Rd
1
DAS
DAS.B Rd
1
DEC
DEC.B Rd
1
DIVXU
DIVXU.B Rs, Rd
1
EEPMOV
EEPMOV
2
INC
INC.B Rd
1
JMP
JSR
LDC
MOV
Note:
*
2
1
BST #xx:3, @Rd
CMP. B #xx:8, Rd
JMP @Rn
2
JMP @aa:16
2
JMP @@aa:8
2
JSR @Rn
2
JSR @aa:16
2
JSR @@aa:8
2
LDC #xx:8, CCR
1
LDC Rs, CCR
1
MOV.B #xx:8, Rd
1
MOV.B Rs, Rd
1
Word Data Internal
Operation
Access
N
M
12
2n + 2*
1
2
1
2
1
1
1
2
1
n: Initial value in R4L. The source and destination operands are accessed n + 1 times
each.
Rev.3.00 Jul. 19, 2007 page 456 of 532
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Appendix A CPU Instruction Set
Instruction Mnemonic
Byte Data
Stack
Instruction Branch
Addr. Read Operation Access
Fetch
L
K
J
I
MOV
MOV.B @Rs, Rd
1
1
MOV.B @(d:16, Rs), 2
Rd
1
MOV.B @Rs+, Rd
1
1
MOV.B @aa:8, Rd
1
1
MOV.B @aa:16, Rd
2
1
MOV.B Rs, @Rd
1
1
MOV.B Rs, @(d:16,
Rd)
2
1
MOV.B Rs, @–Rd
1
1
MOV.B Rs, @aa:8
1
1
MOV.B Rs, @aa:16
2
1
MOV.W #xx:16, Rd
2
MOV.W Rs, Rd
1
MOV.W @Rs, Rd
Word Data Internal
Operation
Access
N
M
2
2
1
1
MOV.W @(d:16, Rs), 2
Rd
1
MOV.W @Rs+, Rd
1
1
MOV.W @aa:16, Rd 2
1
MOV.W Rs, @Rd
1
1
MOV.W Rs, @(d:16, 2
Rd)
1
MOV.W Rs, @–Rd
1
1
MOV.W Rs, @aa:16 2
1
MULXU
MULXU.B Rs, Rd
1
NEG
NEG.B Rd
1
NOP
NOP
1
NOT
NOT.B Rd
1
OR
OR.B #xx:8, Rd
1
OR.B Rs, Rd
1
ORC
ORC #xx:8, CCR
1
ROTL
ROTL.B Rd
1
ROTR
ROTR.B Rd
1
2
2
12
Rev.3.00 Jul. 19, 2007 page 457 of 532
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Appendix A CPU Instruction Set
Instruction Mnemonic
Byte Data
Stack
Instruction Branch
Addr. Read Operation Access
Fetch
L
K
J
I
Word Data Internal
Operation
Access
N
M
ROTXL
ROTXL.B Rd
1
ROTXR
ROTXR.B Rd
1
RTE
RTE
2
2
2
RTS
RTS
2
1
2
SHAL
SHAL.B Rd
1
SHAR
SHAR.B Rd
1
SHLL
SHLL.B Rd
1
SHLR
SHLR.B Rd
1
SLEEP
SLEEP
1
STC
STC CCR, Rd
1
SUB
SUB.B Rs, Rd
1
SUB.W Rs, Rd
1
SUBS
SUBS.W #1, Rd
1
SUBS.W #2, Rd
1
POP
POP Rd
1
1
2
PUSH
PUSH Rs
1
1
2
SUBX
SUBX.B #xx:8, Rd
1
SUBX.B Rs, Rd
1
XOR
XOR.B #xx:8, Rd
1
XOR.B Rs, Rd
1
XORC #xx:8, CCR
1
XORC
Rev.3.00 Jul. 19, 2007 page 458 of 532
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Appendix B Internal I/O Registers
Appendix B Internal I/O Registers
B.1
Register Addresses
B.1.1
H8/3857 Group Addresses
Address Register
(low)
Name
Bit 7
H'80
H'81
Bit Names
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1
SWE
—
—
EV
PV
E
P
1
—
—
—
—
—
ESU
PSU
—
EB6
EB5
EB4
EB3
EB2
EB1
EB0
⎯
⎯
⎯
⎯
⎯
⎯
TSDS2
TSDS1
FLSHE
FLMCR1* FWE
FLMCR2* FLER
Module
Name
Flash
memory
H'82
H'83
1
EBR*
H'84
H'85
H'86
H'87
H'88
H'89
1
MDCR*
H'8A
H'8B
H'8C
H'8D
H'8E
H'8F
H'90
H'91
H'92
SYSCR3* ⎯
1
⎯
⎯
⎯
⎯
⎯
⎯
2
TCWE
B4WI
TCSRWE B2WI
WDON
B0WI
WRST
TCSRW* B6WI
2
TCW7
TCW6
TCW5
TCW4
TCW3
TCW2
TCW1
TCW0
2
⎯
⎯
⎯
⎯
⎯
CKS2
CKS1
CKS0
TCW*
TMW*
Watchdog
timer
H'93
H'94
H'95
H'96
H'97
H'98
H'99
H'9A
H'9B
Rev.3.00 Jul. 19, 2007 page 459 of 532
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Appendix B Internal I/O Registers
Address Register
(low)
Name
Bit 7
Bit Names
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Module
Name
SCI1
H'9C
H'9D
H'9E
H'9F
H'A0
SCR1
SNC1
SNC0
⎯
⎯
CKS3
CKS2
CKS1
CKS0
H'A1
SCSR1
⎯
SOL
ORER
⎯
⎯
⎯
⎯
STF
H'A2
SDRU
SDRU7
SDRU6
SDRU5
SDRU4
SDRU3
SDRU2
SDRU1
SDRU0
H'A3
SDRL
SDRL7
SDRL6
SDRL5
SDRL4
SDRL3
SDRL2
SDRL1
SDRL0
H'A8
SMR
COM
CHR
PE
PM
STOP
MP
CKS1
CKS0
H'A9
BRR
BRR7
BRR6
BRR5
BRR4
BRR3
BRR2
BRR1
BRR0
H'AA
SCR3
TIE
RIE
TE
RE
MPIE
TEIE
CKE1
CKE0
H'AB
TDR
TDR7
TDR6
TDR5
TDR4
TDR3
TDR2
TDR1
TDR0
H'AC
SSR
TDRE
RDRF
OER
FER
PER
TEND
MPBR
MPBT
H'AD
RDR
RDR7
RDR6
RDR5
RDR4
RDR3
RDR2
RDR1
RDR0
H'B0
TMA
TMA7
TMA6
TMA5
⎯
TMA3
TMA2
TMA1
TMA0
H'B1
TCA
TCA7
TCA6
TCA5
TCA4
TCA3
TCA2
TCA1
TCA0
H'B2
TMB
TMB7
⎯
⎯
⎯
⎯
TMB2
TMB1
TMB0
H'B3
TCB/TLB TCB7/
TLB7
TCB6/
TLB6
TCB5/
TLB5
TCB4/
TLB4
TCB3/
TLB3
TCB2/
TLB2
TCB1/
TLB1
TCB0/
TLB0
H'B4
TMC
TMC7
TMC6
TMC5
⎯
⎯
TMC2
TMC1
TMC0
H'B5
TCC/TLC TCC7/
TLC7
TCC6/
TLC6
TCC5/
TLC5
TCC4/
TLC4
TCC3/
TLC3
TCC2/
TLC2
TCC1/
TLC1
TCC0/
TLC0
H'A4
H'A5
H'A6
H'A7
SCI3
H'AE
H'AF
H'B6
TCRF
TOLH
CKSH2
CKSH1
CKSH0
TOLL
CKSL2
CKSL1
CKSL0
H'B7
TCSRF
OVFH
CMFH
OVIEH
CCLRH
OVFL
CMFL
OVIEL
CCLRL
H'B8
TCFH
TCFH7
TCFH6
TCFH5
TCFH4
TCFH3
TCFH2
TCFH1
TCFH0
Rev.3.00 Jul. 19, 2007 page 460 of 532
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Timer A
Timer B
Timer C
Timer F
Appendix B Internal I/O Registers
Bit Names
Address Register
(low)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Module
Name
H'B9
TCFL
TCFL7
TCFL6
TCFL5
TCFL4
TCFL3
TCFL2
TCFL1
TCFL0
Timer F
H'BA
OCRFH
OCRFH7 OCRFH6 OCRFH5 OCRFH4 OCRFH3 OCRFH2 OCRFH1 OCRFH0
H'BB
OCRFL
OCRFL7 OCRFL6 OCRFL5 OCRFL4 OCRFL3 OCRFL2 OCRFL1 OCRFL0
AMR
CKS
H'BC
H'BD
H'BE
H'BF
H'C0
H'C1
H'C2
H'C3
H'C4
TRGE
⎯
⎯
CH3
CH2
CH1
CH0
H'C5
ADRR
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
H'C6
ADSR
ADSF
⎯
⎯
⎯
⎯
⎯
⎯
⎯
H'C8
PMR1
IRQ3
IRQ2
IRQ1
PWM
⎯
TMOFH TMOFL
TMOW
H'C9
PMR2
⎯
⎯
⎯
⎯
IRQ0
POF1
UD
IRQ4
H'CA
PMR3
⎯
⎯
⎯
⎯
⎯
SO1
SI1
SCK1
H'CB
PMR4
NMOD7 NMOD6 NMOD5 NMOD4 NMOD3 NMOD2 NMOD1 NMOD0
H'CC
PMR5
WKP7
WKP6
H'D0
PWCR
⎯
H'D1
PWDRU ⎯
H'D2
PWDRL
PWDRL7 PWDRL6 PWDRL5 PWDRL4 PWDRL3 PWDRL2 PWDRL1 PWDRL0
H'D4
PDR1
P17
P16
P15
P14
P13
P12
P11
P10
H'D5
PDR2
P27
P26
P25
P24
P23
P22
P21
P20
A/D
converter
H'C7
WKP5
WKP4
WKP3
WKP2
WKP1
WKP0
⎯
⎯
⎯
⎯
⎯
⎯
PWCR0
⎯
PWDRU5 PWDRU4 PWDRU3 PWDRU2 PWDRU1 PWDRU0
I/O ports
H'CD
H'CE
H'CF
14-bit
PWM
H'D3
H'D6
PDR3
P37
P36
P35
P34
P33
P32
P31
P30
H'D7
PDR4
⎯
⎯
⎯
⎯
P43
P42
P41
P40
H'D8
PDR5
P57
P56
P55
P54
P53
P52
P51
P50
I/O ports
H'D9
Rev.3.00 Jul. 19, 2007 page 461 of 532
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Appendix B Internal I/O Registers
Address Register
(low)
Name
Bit 7
Bit Names
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
H'DA
Module
Name
I/O ports
H'DB
H'DC
PDR9
P97
P96
P95
P94
P93
P92
P91
P90
H'DD
PDRA
⎯
⎯
⎯
⎯
PA3
PA2
PA1
PA0
H'DE
PDRB
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
H'E0
PUCR1
PUCR17 PUCR16 PUCR15 PUCR14 PUCR13 PUCR12 PUCR11 PUCR10
H'E1
PUCR3
PUCR37 PUCR36 PUCR35 PUCR34 PUCR33 PUCR32 PUCR31 PUCR30
H'E2
PUCR5
PUCR57 PUCR56 PUCR55 PUCR54 PUCR53 PUCR52 PUCR51 PUCR50
H'E4
PCR1
PCR17
PCR16
PCR15
PCR14
PCR13
PCR12
PCR11
PCR10
H'E5
PCR2
PCR27
PCR26
PCR25
PCR24
PCR23
PCR22
PCR21
PCR20
H'DF
H'E3
H'E6
PCR3
PCR37
PCR36
PCR35
PCR34
PCR33
PCR32
PCR31
PCR30
H'E7
PCR4
⎯
⎯
⎯
⎯
⎯
PCR42
PCR41
PCR40
H'E8
PCR5
PCR57
PCR56
PCR55
PCR54
PCR53
PCR52
PCR51
PCR50
H'E9
H'EA
H'EB
H'EC
PCR9
PCR97
PCR96
PCR95
PCR94
PCR93
PCR92
PCR91
PCR90
H'ED
PCRA
⎯
⎯
⎯
⎯
PCRA3
PCRA2
PCRA1
PCRA0
SYSCR1 SSBY
STS2
STS1
STS0
LSON
⎯
⎯
⎯
H'F1
SYSCR2 ⎯
⎯
⎯
NESEL
DTON
MSON
SA1
SA0
H'F2
IEGR
⎯
⎯
⎯
IEG4
IEG3
IEG2
IEG1
IEG0
H'F3
IENR1
IENTA
IENS1
IENWP
IEN4
IEN3
IEN2
IEN1
IEN0
H'F4
IENR2
IENDT
IENAD
⎯
⎯
IENTFH IENTFL
IENTC
IENTB
H'F6
IRR1
IRRTA
IRRS1
⎯
IRRI4
IRRI3
IRRI1
IRRI0
H'F7
IRR2
IRRDT
IRRAD
⎯
⎯
IRRTFH IRRTFL
IRRTC
IRRTB
IWPR
IWPF7
IWPF6
IWPF5
IWPF4
IWPF3
IWPF1
IWPF0
H'EE
H'EF
H'F0
H'F5
IRRI2
H'F8
H'F9
Rev.3.00 Jul. 19, 2007 page 462 of 532
REJ09B0397-0300
IWPF2
System
control
Appendix B Internal I/O Registers
Address Register
(low)
Name
Bit 7
Bit Names
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Module
Name
H'FA
H'FB
H'FC
H'FD
H'FE
H'FF
Legend:
SCI1: Serial communication interface 1
SCI3: Serial communication interface 3
Notes: 1. Applies to the F-ZTAT version. In the mask ROM version, a read access to the address
of a register other than MDCR will always return 0, a read access to the MDCR address
will return an undefined value, and writes are invalid.
2. Applies to the F-ZTAT version. In the mask ROM version, read accesses to the
corresponding addresses will always return 1, and writes are invalid.
Rev.3.00 Jul. 19, 2007 page 463 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
B.1.2
H8/3854 Group Addresses
Address Register
(low)
Name
Bit 7
Bit Names
Bit 6
Bit 5
Bit 4
1
SWE
⎯
1
⎯
⎯
⎯
EB6
⎯
SYSCR3* ⎯
H'80
FLMCR1* FWE
H'81
FLMCR2* FLER
Bit 3
Bit 2
Bit 1
Bit 0
⎯
EV
PV
E
P
⎯
⎯
⎯
ESU
PSU
EB5
EB4
EB3
EB2
EB1
EB0
⎯
⎯
⎯
⎯
⎯
TSDS2
TSDS1
⎯
⎯
⎯
FLSHE
⎯
⎯
⎯
Module
Name
Flash
memory
H'82
H'83
1
EBR*
H'84
H'85
H'86
H'87
H'88
H'89
1
MDCR*
H'8A
H'8B
H'8C
H'8D
H'8E
H'8F
1
2
H'90
TCSRW* B6WI
H'91
TCW*
TCWE
B4WI
TCSRWE B2WI
WDON
B0WI
WRST
2
TCW7
TCW6
TCW5
TCW4
TCW3
TCW2
TCW1
TCW0
H'92
TMW*
2
⎯
⎯
⎯
⎯
⎯
CKS2
CKS1
CKS0
H'93
H'94
H'95
H'96
H'97
H'98
H'99
H'9A
H'9B
H'9C
H'9D
H'9E
H'9F
Rev.3.00 Jul. 19, 2007 page 464 of 532
REJ09B0397-0300
Watchdog
timer
Appendix B Internal I/O Registers
Address Register
(low)
Name
Bit 7
Bit Names
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Module
Name
COM
CHR
PE
PM
STOP
MP
CKS1
CKS0
SCI3
H'A0
H'A1
H'A2
H'A3
H'A4
H'A5
H'A6
H'A7
H'A8
SMR
H'A9
BRR
BRR7
BRR6
BRR5
BRR4
BRR3
BRR2
BRR1
BRR0
H'AA
SCR3
TIE
RIE
TE
RE
MPIE
TEIE
CKE1
CKE0
H'AB
TDR
TDR7
TDR6
TDR5
TDR4
TDR3
TDR2
TDR1
TDR0
H'AC
SSR
TDRE
RDRF
OER
FER
PER
TEND
MPBR
MPBT
H'AD
RDR
RDR7
RDR6
RDR5
RDR4
RDR3
RDR2
RDR1
RDR0
H'AE
H'AF
H'B0
TMA
TMA7
TMA6
TMA5
⎯
TMA3
TMA2
TMA1
TMA0
H'B1
TCA
TCA7
TCA6
TCA5
TCA4
TCA3
TCA2
TCA1
TCA0
H'B2
TMB
TMB7
⎯
⎯
⎯
⎯
TMB2
TMB1
TMB0
H'B3
TCB/TLB TCB7/
TLB7
TCB6/
TLB6
TCB5/
TLB5
TCB4/
TLB4
TCB3/
TLB3
TCB2/
TLB2
TCB1/
TLB1
TCB0/
TLB0
TCRF
CKSH2
CKSH1
CKSH0
TOLL
CKSL2
CKSL1
CKSL0
Timer A
Timer B
H'B4
H'B5
H'B6
TOLH
H'B7
TCSRF
OVFH
CMFH
OVIEH
CCLRH
OVFL
CMFL
OVIEL
CCLRL
H'B8
TCFH
TCFH7
TCFH6
TCFH5
TCFH4
TCFH3
TCFH2
TCFH1
TCFH0
TCFL6
TCFL5
TCFL4
TCFL3
TCFL2
TCFL1
TCFL0
H'B9
TCFL
TCFL7
H'BA
OCRFH
OCRFH7 OCRFH6 OCRFH5 OCRFH4 OCRFH3 OCRFH2 OCRFH1 OCRFH0
H'BB
OCRFL
OCRFL7 OCRFL6 OCRFL5 OCRFL4 OCRFL3 OCRFL2 OCRFL1 OCRFL0
Timer F
H'BC
H'BD
H'BE
H'BF
H'C0
H'C1
Rev.3.00 Jul. 19, 2007 page 465 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
Address Register
(low)
Name
Bit 7
Bit Names
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Module
Name
H'C2
H'C3
H'C4
AMR
CKS
TRGE
⎯
⎯
CH3
CH2
CH1
CH0
H'C5
ADRR
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
H'C6
ADSR
ADSF
⎯
⎯
⎯
⎯
⎯
⎯
⎯
H'C8
PMR1
IRQ3
⎯
IRQ1
⎯
⎯
TMOFH TMOFL
TMOW
H'C9
PMR2
⎯
⎯
⎯
⎯
IRQ0
⎯
IRQ4
H'CB
PMR4
NMOD7 NMOD6 NMOD5 NMOD4 NMOD3 NMOD2 NMOD1 NMOD0
H'CC
PMR5
WKP7
WKP6
WKP5
WKP4
H'D4
PDR1
P17
⎯
P15
⎯
H'D5
PDR2
P27
P26
P25
P24
H'D7
PDR4
⎯
⎯
⎯
⎯
H'D8
PDR5
P57
P56
P55
P54
A/D
converter
H'C7
⎯
I/O ports
H'CA
WKP3
WKP2
WKP1
WKP0
⎯
P12
P11
P10
P23
P22
P21
P20
P43
P42
P41
P40
P53
P52
P51
P50
H'CD
H'CE
H'CF
H'D0
H'D1
H'D2
H'D3
H'D6
H'D9
H'DA
H'DB
H'DC
PDR9
P97
P96
P95
P94
P93
P92
P91
P90
H'DD
PDRA
⎯
⎯
⎯
⎯
PA3
PA2
PA1
PA0
H'DE
PDRB
PB7
PB6
PB5
PB4
⎯
⎯
⎯
⎯
PUCR1
PUCR17 ⎯
⎯
PUCR12 PUCR11 PUCR10
PUCR5
PUCR57 PUCR56 PUCR55 PUCR54 PUCR53 PUCR52 PUCR51 PUCR50
H'DF
H'E0
PUCR15 ⎯
H'E1
H'E2
H'E3
Rev.3.00 Jul. 19, 2007 page 466 of 532
REJ09B0397-0300
I/O ports
Appendix B Internal I/O Registers
Bit Names
Address Register
(low)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Module
Name
H'E4
PCR1
PCR17
⎯
PCR15
⎯
⎯
PCR12
PCR11
PCR10
I/O ports
H'E5
PCR2
PCR27
PCR26
PCR25
PCR24
PCR23
PCR22
PCR21
PCR20
H'E7
PCR4
⎯
⎯
⎯
⎯
⎯
PCR42
PCR41
PCR40
H'E8
PCR5
PCR57
PCR56
PCR55
PCR54
PCR53
PCR52
PCR51
PCR50
H'EC
PCR9
PCR97
PCR96
PCR95
PCR94
PCR93
PCR92
PCR91
PCR90
H'ED
PCRA
⎯
⎯
⎯
⎯
PCRA3
PCRA2
PCRA1
PCRA0
SYSCR1 SSBY
STS2
STS1
STS0
LSON
⎯
⎯
⎯
H'F1
SYSCR2 ⎯
⎯
⎯
NESEL
DTON
MSON
SA1
SA0
H'F2
IEGR
⎯
⎯
⎯
IEG4
IEG3
⎯
IEG1
IEG0
H'F3
IENR1
IENTA
⎯
IENWP
IEN4
IEN3
⎯
IEN1
IEN0
H'F4
IENR2
IENDT
IENAD
⎯
⎯
IENTFH IENTFL
⎯
IENTB
H'E6
H'E9
H'EA
H'EB
H'EE
H'EF
H'F0
System
control
H'F5
H'F6
IRR1
IRRTA
⎯
⎯
IRRI4
IRRI3
IRRI1
IRRI0
H'F7
IRR2
IRRDT
IRRAD
⎯
⎯
IRRTFH IRRTFL
⎯
⎯
IRRTB
IWPR
IWPF7
IWPF6
IWPF5
IWPF4
IWPF3
IWPF1
IWPF0
H'F8
H'F9
IWPF2
H'FA
H'FB
H'FC
H'FD
H'FE
H'FF
Legend:
SCI3: Serial communication interface 3
Notes: 1. Applies to the F-ZTAT version. In the mask ROM version, a read access to the address
of a register other than MDCR will always return 0, a read access to the MDCR address
will return an undefined value, and writes are invalid.
2. Applies to the F-ZTAT version. In the mask ROM version, read accesses to the
corresponding addresses will always return 1, and writes are invalid.
Rev.3.00 Jul. 19, 2007 page 467 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
B.2
Register Descriptions
Register
acronym
Register
name
Address to which the
register is mapped
Name of
on-chip
supporting
module
Timer C
H'B4
TMC—Timer mode register C
Bit
numbers
Bit
Initial bit
values
7
6
5
4
3
2
1
0
TMC7
TMC6
TMC5
⎯
⎯
TMC2
TMC1
TMC0
Initial value
0
0
0
1
1
0
0
0
Read/Write
R/W
R/W
R/W
⎯
⎯
R/W
R/W
R/W
Clock select
0 0 0 Internal clock: φ/8192
1 Internal clock: φ/2048
1 0 Internal clock: φ/512
1 Internal clock: φ/64
1 0 0 Internal clock: φ/16
1 Internal clock: φ/4
1 0 Internal clock: φ W/4
1 External event (TMIC): Rising or falling edge
Possible types of access
R
Read only
W
Write only
R/W Read and write
Counter up/down control
0 0 TCC is an up-counter
1 TCC is a down-counter
1 * TCC up/down control is determined by input at pin
UD. TCC is a down-counter if the UD input is high,
and an up-counter if the UD input is low.
Legend: * Don't care
Auto-reload function select
0 Interval function selected
1 Auto-reload function selected
Rev.3.00 Jul. 19, 2007 page 468 of 532
REJ09B0397-0300
Names of the
bits. Dashes
(⎯) indicate
reserved bits.
Full name
of bit
Descriptions
of bit settings
Appendix B Internal I/O Registers
FLMCR1—Flash memory control register 1
Bit
:
H'80
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
FWE
SWE
⎯
⎯
EV
PV
E
P
Initial value :
⎯*
0
0
0
0
0
0
0
Read/Write :
R
R/W
⎯
⎯
R/W
R/W
R/W
R/W
Program
0
Program mode cleared
1
Transition to program mode
[Setting condition]
When FWE = 1, SWE = 1, and PSU = 1
Erase
0
Erase mode cleared
1
Transition to erase mode
[Setting condition]
When FWE = 1, SWE = 1, and ESU = 1
Program-verify
0
Program-verify mode cleared
1
Transition to program-verify mode
[Setting condition]
When FWE = 1 and SWE = 1
Erase -verify
0
Erase-verify mode cleared
1
Transition to erase-verify mode
[Setting condition]
When FWE = 1 and SWE = 1
Software write enable
0
Programmin/disabled
1
Programming enabled
[Setting condition]
When FWE = 1
Flash write enable
0
When a low level is input to the FWE pin
(hardware-protected state)
1
When a high level is input to the FWE pin
Note: * Determined by the state of the FWE pin.
Rev.3.00 Jul. 19, 2007 page 469 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
FLMCR2—Flash memory control register 2
Bit
:
H'81
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
FLER
⎯
⎯
⎯
⎯
⎯
ESU
PSU
Initial value :
0
0
0
0
0
0
0
0
Read/Write :
R
⎯
⎯
⎯
⎯
⎯
R/W
R/W
Program setup
0
Program setup cleared
1
Program setup
[Setting condition]
When FWE = 1 and SWE = 1
Erase setup
0
Erase setup cleared
1
Erase setup
[Setting condition]
When FWE = 1 and SWE = 1
Flash memory error
0
Flash memory is operating normally
Flash memory program/erase protection
(error protection) is disabled
[Clearing condition]
Reset or hardware standby mode
1
An error occurred during flash memory programming/erasing
Flash memory program/erase protection
(error protection) is enabled
[Setting condition]
See section 6.6.3, Error Protection
Rev.3.00 Jul. 19, 2007 page 470 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
EBR—Erase block register
Bit
:
H'83
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
⎯
EB6
EB5
EB4
EB3
EB2
EB1
EB0
Initial value :
0
0
0
0
0
0
0
0
Read/Write :
⎯
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Flash memory erase blocks
Block (Size)
Addresses
EB0 (1 kbyte)
H'0000 to H'03FF
EB1 (1 kbyte)
H'0400 to H'07FF
EB2 (1 kbyte)
H'0800 to H'0BFF
EB3 (1 kbyte)
H'0C00 to H'0FFF
EB4 (28 kbytes)
H'1000 to H'7FFF
EB5 (16 kbytes)
H'8000 to H'BFFF
EB6 (12 kbytes)
H'C000 to H'EDFF
Rev.3.00 Jul. 19, 2007 page 471 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
MDCR—Mode control register
Bit
:
H'89
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
⎯
TSDS2
TSDS1
Initial value :
0
0
0
0
0
0
⎯*
⎯*
Read/Write :
⎯
⎯
⎯
⎯
⎯
⎯
R
R
Test pin monitor bits
Note: * Determined by the TEST and TEST2 pins.
SYSCR3—System control register 3
Bit
:
H'8F
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
FLSHE
⎯
⎯
⎯
Initial value :
0
0
0
0
0
0
0
0
Read/Write :
⎯
⎯
⎯
⎯
R/W
⎯
⎯
⎯
Flash memory control register enable
Rev.3.00 Jul. 19, 2007 page 472 of 532
REJ09B0397-0300
0
Flash memory control registers are unselected
1
Flash memory control registers are selected
Appendix B Internal I/O Registers
TCSRW—Timer control/status register W
Bit
:
Initial value :
Read/Write :
7
6
B6WI
TCWE
1
R
0
R/(W)*
H'90
5
4
Flash memory
(On-chip flash memory version only)
3
B4WI TCSRWE B2WI
1
R
0
R/(W)*
1
R
2
1
0
WDON
B0WI
WRST
0
R/(W)*
1
R
0
R/(W)*
Watchdog timer reset
[Clearing conditions]
0 • Reset by RES pin
• When 0 is written to WRST while writing 0 to
B0WI when TCSRWE = 1
[Setting condition]
1 When TCW overflows and an internal reset
signal is generated
Bit 0 write inhibit
0 Writing to bit 0 is enabled
1 Writing to bit 0 is disabled
Watchdog timer on
0 Watchdog timer operation is disabled
1 Watchdog timer operation is enabled
Bit 2 write inhibit
0 Writing to bit 2 is enabled
1 Writing to bit 2 is disabled
Timer control/status register W write enable
0 Writing to bits 2 and 0 is disabled
1 Writing to bits 2 and 0 is enabled
Bit 4 write inhibit
0 Writing to bit 4 is enabled
1 Writing to bit 4 is disabled
Timer counter W write enable
0 Writing of data to TCW is disabled
1 Writing of data to TCW is enabled
Bit 6 write inhibit
0 Writing to bit 6 is enabled
1 Writing to bit 6 is disabled
Note: * Can be written to only when the write condition is satisfied.
Rev.3.00 Jul. 19, 2007 page 473 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
TCW—Timer counter W
Bit
:
Initial value :
Read/Write :
H'91
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
TCW7
TCW6
TCW5
TCW4
TCW3
TCW2
TCW1
TCW0
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
Count value
TMW—Timer mode register W
Bit
:
Initial value :
Read/Write :
H'92
Flash memory
(On-chip flash memory version only)
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
CKS2
CKS1
CKS0
1
⎯
1
⎯
1
⎯
1
⎯
1
⎯
1
R/W
1
R/W
1
R/W
Clock select
Bit 1
Bit 2
CKS1
CKS2
0
0
0
0
1
0
1
0
0
1
0
1
1
1
1
1
Bit 0
CKS0
0
1
0
1
0
1
0
1
Description
Internal clock: φ/64
Internal clock: φ/128
Internal clock: φ/256
Internal clock: φ/512
Internal clock: φ/1024
Internal clock: φ/2048
Internal clock: φ/4096
Internal clock: φ/8192 (initial value)
Note: TMW is an 8-bit read/write register that selects the input clock. Upon reset, TMW is
initialized to H'FF.
Rev.3.00 Jul. 19, 2007 page 474 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
SCR1—Serial control register 1
Bit
H'A0
SCI1
(H8/3857 Group only)
7
6
5
4
3
2
1
0
SNC1
SNC0
⎯
⎯
CKS3
CKS2
CKS1
CKS0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Clock Select (CKS2 to CKS0)
Bit 2 Bit 1 Bit 0
CKS2 CKS1 CKS0
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Serial Clock Cycle
Synchronous
Prescaler
Division
φ = 5 MHz
φ = 2.5 MHz
φ/1024
204.8 μs
409.6 μs
φ/256
51.2 μs
102.4 μs
12.8 μs
25.6 μs
φ/64
6.4 μs
12.8 μs
φ/32
3.2 μs
6.4 μs
φ/16
1.6 μs
3.2 μs
φ/8
0.8 μs
1.6 μs
φ/4
⎯
0.8 μs
φ/2
Clock source select
0 Clock source is prescaler S, and pin SCK 1 is output pin
1 Clock source is external clock, and pin SCK 1 is input pin
Operation mode select
0 0 8-bit synchronous transfer mode
1 16-bit synchronous transfer mode
1 0 Continuous clock output mode
1 Reserved
Rev.3.00 Jul. 19, 2007 page 475 of 532
REJ09B0397-0300
Appendix B Internal I/O Registers
SCSR1—Serial control/status register 1
Bit
H'A1
SCI1
(H8/3857 Group only)
7
6
5
4
3
2
1
0
⎯
SOL
ORER
⎯
⎯
⎯
⎯
STF
Initial value
1
0
0
0
0
0
0
0
Read/Write
⎯
R/W
R/(W)*
⎯
⎯
⎯
⎯
R/W
Start flag
0 Read
Write
1 Read
Write
Indicates that transfer is stopped
Invalid
Indicates transfer in progress
Starts a transfer operation
Overrun error flag
0 [Clearing condition]
After reading 1, cleared by writing 0
1 [Setting condition]
Set if a clock pulse is input after transfer
is complete, when an external clock is used
Extended data bit
0 Read SO 1 pin output level is low
Write SO 1 pin output level changes to low
1 Read SO 1 pin output level is high
Write SO 1 pin output level changes to high
Note: * Only a write of 0 for flag clearing is possible.
Rev.3.00 Jul. 19, 2007 page 476 of 532
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Appendix B Internal I/O Registers
SDRU—Serial data register U
Bit
Initial value
Read/Write
H'A2
SCI1
(H8/3857 Group only)
7
6
5
4
3
2
1
0
SDRU7
SDRU6
SDRU5
SDRU4
SDRU3
SDRU2
SDRU1
SDRU0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Used to set transmit data and store receive data
8-bit transfer mode: Not used
16-bit transfer mode: Upper 8 bits of data
SDRL—Serial data register L
Bit
Initial value
Read/Write
H'A3
SCI1
(H8/3857 Group only)
7
6
5
4
3
2
1
0
SDRL7
SDRL6
SDRL5
SDRL4
SDRL3
SDRL2
SDRL1
SDRL0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Used to set transmit data and store receive data
8-bit transfer mode: 8-bit data
16-bit transfer mode: Lower 8 bits of data
Rev.3.00 Jul. 19, 2007 page 477 of 532
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Appendix B Internal I/O Registers
SMR—Serial mode register
Bit
H'A8
SCI3
7
6
5
4
3
2
1
0
COM
CHR
PE
PM
STOP
MP
CKS1
CKS0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Multiprocessor mode
0 Multiprocessor communication function disabled
1 Multiprocessor communication function enabled
Clock select 0, 1
0 0 φ clock
1 φ/4 clock
1 0 φ/16 clock
1 φ/64 clock
Stop bit length
0 1 stop bit
1 2 stop bits
Parity mode
0 Even parity
1 Odd parity
Parity enable
0 Parity bit adding and checking disabled
1 Parity bit adding and checking enabled
Character length
0 8-bit data
1 7-bit data
Communication mode
0 Asynchronous mode
1 Synchronous mode
BRR—Bit rate register
Bit
H'A9
SCI3
7
6
5
4
3
2
1
0
BRR7
BRR6
BRR5
BRR4
BRR3
BRR2
BRR1
BRR0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Rev.3.00 Jul. 19, 2007 page 478 of 532
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Appendix B Internal I/O Registers
SCR3—Serial control register 3
Bit
H'AA
SCI3
7
6
5
4
3
2
1
0
TIE
RIE
TE
RE
MPIE
TEIE
CKE1
CKE0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Clock enable
Bit 1
CKE1
0
Bit 0
CKE0
0
1
1
0
1
Communication Mode
Asynchronous
Synchronous
Asynchronous
Synchronous
Asynchronous
Synchronous
Asynchronous
Synchronous
Description
Clock Source
Internal clock
Internal clock
Internal clock
Reserved (Do not set
this combination)
External clock
External clock
Reserved (Do not set
this combination)
Reserved (Do not set
this combination)
SCK 3 Pin Function
I/O port
Serial clock output
Clock output
Reserved (Do not set
this combination)
Clock input
Serial clock input
Reserved (Do not set
this combination)
Reserved (Do not set
this combination)
Transmit end interrupt enable
0
1
Transmit end interrupt (TEI) disabled
Transmit end interrupt (TEI) enabled
Multiprocessor interrupt enable
0
Multiprocessor interrupt request disabled (ordinary receive operation)
[Clearing condition]
Multiprocessor bit receives a data value of 1
1
Multiprocessor interrupt request enabled
Until a multiprocessor bit value of 1 is received, the receive data full interrupt (RXI) and receive
error interrupt (ERI) are disabled, and serial status register (SSR) flags RDRF, FER, and
OER are not set.
Receive enable
0
1
Receive operation disabled (RXD is a general I/O port)
Receive operation enabled (RXD is the receive data pin)
Transmit enable
0
1
Transmit operation disabled (TXD is a general I/O port)
Transmit operation enabled (TXD is the transmit data pin)
Receive interrupt enable
0
1
Receive data full interrupt request (RXI) and receive error interrupt request (ERI) disabled
Receive data full interrupt request (RXI) and receive error interrupt request (ERI) enabled
Transmit interrupt enable
0
1
Transmit data empty interrupt request (TXI) disabled
Transmit data empty interrupt request (TXI) enabled
Rev.3.00 Jul. 19, 2007 page 479 of 532
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Appendix B Internal I/O Registers
TDR—Transmit data register
Bit
H'AB
SCI3
7
6
5
4
3
2
1
0
TDR7
TDR6
TDR5
TDR4
TDR3
TDR2
TDR1
TDR0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Data to be transferred to TSR
Rev.3.00 Jul. 19, 2007 page 480 of 532
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Appendix B Internal I/O Registers
SSR—Serial status register
Bit
H'AC
SCI3
7
6
5
4
3
2
1
0
TDRE
RDRF
OER
FER
PER
TEND
MPBR
MPBT
Initial value
1
0
0
0
0
1
0
0
Read/Write
R/(W)*
R/(W)*
R/(W)*
R/(W)*
R/(W)*
R
R
R/W
Multiprocessor bit receive
0 Indicates reception of data in which the multiprocessor bit is 0
1 Indicates reception of data in which the multiprocessor bit is 1
Multiprocessor bit transmit
0 The multiprocessor bit in transmit data is 0
1 The multiprocessor bit in transmit data is 1
Transmit end
0 Indicates that transmission is in progress
[Clearing conditions] After reading TDRE = 1, cleared by writing 0 to TDRE.
When data is written to TDR by an instruction.
1 Indicates that a transmission has ended
[Setting conditions]
When bit TE in serial control register 3 (SCR3) is 0.
If TDRE is set to 1 when the last bit of a transmitted character is sent.
Parity error
0 Indicates that data receiving is in progress or has been completed
[Clearing condition]
After reading PER = 1, cleared by writing 0
1 Indicates that a parity error occurred in data receiving
[Setting condition]
When the sum of 1s in received data plus the parity bit does not match
the parity mode bit (PM) setting in the serial mode register (SMR)
Framing error
0 Indicates that data receiving is in progress or has been completed
[Clearing condition]
After reading FER = 1, cleared by writing 0
1 Indicates that a framing error occurred in data receiving
[Setting condition]
The stop bit at the end of receive data is checked and found to be 0
Overrun error
0 Indicates that data receiving is in progress or has been completed
[Clearing condition]
After reading OER = 1, cleared by writing 0
1 Indicates that an overrun error occurred in data receiving
[Setting condition]
When reception of the next serial data is completed while RDRF is set to 1
Receive data register full
0 Indicates there is no receive data in RDR
[Clearing conditions] After reading RDRF = 1, cleared by writing 0.
When data is read from RDR by an instruction.
1 Indicates that there is receive data in RDR
[Setting condition]
When receiving ends normally, with receive data transferred from RSR to RDR
Transmit data register empty
0 Indicates that transmit data written to TDR has not been transferred to TSR
[Clearing conditions] After reading TDRE = 1, cleared by writing 0.
When data is written to TDR by an instruction.
1 Indicates that no transmit data has been written to TDR, or the transmit data written to TDR has been transferred to TSR
[Setting conditions]
When bit TE in serial control register 3 (SCR3) is 0.
When data is transferred from TDR to TSR.
Note: * Only a write of 0 for flag clearing is possible.
Rev.3.00 Jul. 19, 2007 page 481 of 532
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Appendix B Internal I/O Registers
RDR—Receive data register
Bit
H'AD
SCI3
7
6
5
4
3
2
1
0
RDR7
RDR6
RDR5
RDR4
RDR3
RDR2
RDR1
RDR0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
TMA—Timer mode register A
Bit
H'B0
Timer A
7
6
5
4
3
2
1
0
TMA7
TMA6
TMA5
—
TMA3
TMA2
TMA1
TMA0
Initial value
0
0
0
1
0
0
0
0
Read/Write
R/W
R/W
R/W
—
R/W
R/W
R/W
R/W
Clock output select
0 0 0 φ/32
1 φ/16
1 0 φ/8
1 φ/4
1 0 0 φ W /32
1 φ W /16
1 0 φ W /8
1 φ W /4
Internal clock select
Prescaler and Divider Ratio
TMA3 TMA2 TMA1 TMA0 or Overflow Period
0
0
0
φ/8192
0
PSS
1
φ/4096
PSS
φ/2048
PSS
1
0
φ/512
PSS
1
1
0
0
φ/256
PSS
1
φ/128
PSS
φ/32
1
0
PSS
φ/8
1
PSS
0
0
0
1s
1
PSW
1
0.5 s
PSW
0.25 s
1
0
PSW
0.03125 s
1
PSW
1
0
0
PSW and TCA are reset
1
1
0
1
Rev.3.00 Jul. 19, 2007 page 482 of 532
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Function
Interval
timer
Time
base
Appendix B Internal I/O Registers
TCA—Timer counter A
Bit
H'B1
Timer A
7
6
5
4
3
2
1
0
TCA7
TCA6
TCA5
TCA4
TCA3
TCA2
TCA1
TCA0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
Count value
TMB—Timer mode register B
Bit
H'B2
Timer B
7
6
5
4
3
2
1
0
TMB7
—
—
—
—
TMB2
TMB1
TMB0
Initial value
0
1
1
1
1
0
0
0
Read/Write
R/W
—
—
—
—
R/W
R/W
R/W
Auto-reload function select
0 Interval timer function selected
1 Auto-reload function selected
Clock select
0 0 0 Internal clock: φ/8192
1 Internal clock: φ/2048
1 0 Internal clock: φ/512
1 Internal clock: φ/256
1 0 0 Internal clock: φ/64
1 Internal clock: φ/16
1 0 Internal clock: φ/4
1 External event (TMIB): Rising or falling edge
Rev.3.00 Jul. 19, 2007 page 483 of 532
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Appendix B Internal I/O Registers
TCB—Timer counter B
Bit
H'B3
Timer B
7
6
5
4
3
2
1
0
TCB7
TCB6
TCB5
TCB4
TCB3
TCB2
TCB1
TCB0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
Count value
TLB—Timer load register B
Bit
H'B3
Timer B
7
6
5
4
3
2
1
0
TLB7
TLB6
TLB5
TLB4
TLB3
TLB2
TLB1
TLB0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Reload value
Rev.3.00 Jul. 19, 2007 page 484 of 532
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Appendix B Internal I/O Registers
TMC—Timer mode register C
Bit
H'B4
Timer C
(H8/3857 Group only)
7
6
5
4
3
2
1
0
TMC7
TMC6
TMC5
⎯
⎯
TMC2
TMC1
TMC0
Initial value
0
0
0
1
1
0
0
0
Read/Write
R/W
R/W
R/W
⎯
⎯
R/W
R/W
R/W
Auto-reload function select
0 Interval timer function selected
1 Auto-reload function selected
Clock select
0 0 0 Internal clock: φ/8192
1 Internal clock: φ/2048
1 0 Internal clock: φ/512
1 Internal clock: φ/64
1 0 0 Internal clock: φ/16
1 Internal clock: φ/4
1 0 Internal clock: φ W/4
1 External event (TMIC): Rising or falling edge
Counter up/down control
0 0 TCC is an up-counter
1 TCC is a down-counter
1 * TCC up/down operation is hardware-controlled by
input at the UD pin. TCC is a down-counter if the UD
input is high, and an up-counter if the UD input is low.
Legend: * Don't care
TCC—Timer counter C
Bit
H'B5
Timer C
(H8/3857 Group only)
7
6
5
4
3
2
1
0
TCC7
TCC6
TCC5
TCC4
TCC3
TCC2
TCC1
TCC0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R
R
R
R
R
R
R
R
Count value
Rev.3.00 Jul. 19, 2007 page 485 of 532
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Appendix B Internal I/O Registers
TLC—Timer load register C
Bit
H'B5
Timer C
(H8/3857 Group only)
7
6
5
4
3
2
1
0
TLC7
TLC6
TLC5
TLC4
TLC3
TLC2
TLC1
TLC0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Reload value
TCRF—Timer control register F
Bit
H'B6
Timer F
7
6
5
4
3
2
1
0
TOLH
CKSH2
CKSH1
CKSH0
TOLL
CKSL2
CKSL1
CKSL0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Toggle output level H
0 Low level
1 High level
Clock select L
0 * * External event (TMIF): Rising or falling edge
1 0 0 Internal clock: φ/32
1 Internal clock: φ/16
1 0 Internal clock: φ/4
1 Internal clock: φ/2
Toggle output level L
0 Low level
1 High level
Clock select H
0 * * 16-bit mode selected. TCFL overflow signals are counted.
1 0 0 Internal clock: φ/32
1 Internal clock: φ/16
1 0 Internal clock: φ/4
1 Internal clock: φ/2
Legend: * Don't care
Rev.3.00 Jul. 19, 2007 page 486 of 532
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Appendix B Internal I/O Registers
TCSRF—Timer control/status register F
Bit
H'B7
Timer F
7
6
5
4
3
2
1
0
OVFH
CMFH
OVIEH
CCLRH
OVFL
CMFL
OVIEL
CCLRL
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/(W)*
R/(W)*
R/W
R/W
R/(W)*
R/(W)*
R/W
R/W
Timer overflow interrupt enable L
0 TCFL overflow interrupt disabled
1 TCFL overflow interrupt enabled
Compare match flag L
0 [Clearing condition]
After reading CMFL = 1, cleared by writing 0 to CMFL
1 [Setting condition]
When the TCFL value matches the OCRFL value
Timer overflow flag L
0 [Clearing condition]
After reading OVFL = 1, cleared by writing 0 to OVFL
1 [Setting condition]
When the value of TCFL goes from H'FF to H'00
Counter clear H
0 16-bit mode:
8-bit mode:
1 16-bit mode:
8-bit mode:
TCF clearing by compare match disabled
TCFH clearing by compare match disabled
TCF clearing by compare match enabled
TCFH clearing by compare match enabled
Timer overflow interrupt enable H
0 TCFH overflow interrupt disabled
1 TCFH overflow interrupt enabled
Counter clear L
0 TCFL clearing by compare match disabled
1 TCFL clearing by compare match enabled
Compare match flag H
0 [Clearing condition]
After reading CMFH = 1, cleared by writing 0 to CMFH
1 [Setting condition]
When the TCFH value matches the OCRFH value
Timer overflow flag H
0 [Clearing condition]
After reading OVFH = 1, cleared by writing 0 to OVFH
1 [Setting condition]
When the value of TCFH goes from H'FF to H'00
Note: * Only a write of 0 for flag clearing is possible.
Rev.3.00 Jul. 19, 2007 page 487 of 532
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Appendix B Internal I/O Registers
TCFH—8-bit timer counter FH
Bit
H'B8
Timer F
7
6
5
4
3
2
1
0
TCFH7
TCFH6
TCFH5
TCFH4
TCFH3
TCFH2
TCFH1
TCFH0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Count value
TCFL—8-bit timer counter FL
Bit
H'B9
Timer F
7
6
5
4
3
2
1
0
TCFL7
TCFL6
TCFL5
TCFL4
TCFL3
TCFL2
TCFL1
TCFL0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Count value
OCRFH—Output compare register FH
Bit
7
6
5
H'BA
4
3
2
Timer F
1
0
OCRFH7 OCRFH6 OCRFH5 OCRFH4 OCRFH3 OCRFH2 OCRFH1 OCRFH0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
OCRFL—Output compare register FL
Bit
7
6
5
H'BB
4
3
Timer F
2
1
0
OCRFL7 OCRFL6 OCRFL5 OCRFL4 OCRFL3 OCRFL2 OCRFL1 OCRFL0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Rev.3.00 Jul. 19, 2007 page 488 of 532
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Appendix B Internal I/O Registers
AMR—A/D mode register
Bit
H'C4
A/D converter
7
6
5
4
3
2
1
0
CKS
TRGE
⎯
⎯
CH3
CH2
CH1
CH0
Initial value
0
0
1
1
0
0
0
0
Read/Write
R/W
R/W
⎯
⎯
R/W
R/W
R/W
R/W
Channel select
Bit 3 Bit 2 Bit 1
CH3 CH2 CH1
0
0
*
1
0
Bit 0
CH0
1
1
0
0
1
1
1
*
*
0
1
0
1
0
1
0
1
*
Analog input channel
No channel selected
AN 0 *1
AN 1 *1
AN 2 *1
AN 3 *1
AN 4
AN 5
AN 6
AN 7
Reserved
External trigger select
0 Disables start of A/D conversion by external trigger
1 Enables start of A/D conversion by rising or falling edge
of external trigger at pin ADTRG
Clock select
Bit 7
CKS Conversion Period
0
62/φ
1
31/φ
Conversion Time
φ = 2 MHz φ = 5 MHz
31 μs
15.5 μs
12.4 μs
⎯*2
Legend: * Don't care
Notes: 1. AN0 to AN3 can be selected in the H8/3857 Group only. They must not be
selected in the H8/3854 Group.
2. Operation is not guaranteed if the conversion time is less than 12.4 μs.
Set bit 7 for a value of at least 12.4 μs.
Rev.3.00 Jul. 19, 2007 page 489 of 532
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Appendix B Internal I/O Registers
ADRR—A/D result register
Bit
Initial value
Read/Write
H'C5
A/D converter
7
6
5
4
3
2
1
0
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
ADR0
Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined
R
R
R
R
R
R
R
R
A/D conversion result
ADSR—A/D start register
Bit
H'C6
A/D converter
7
6
5
4
3
2
1
0
ADSF
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Initial value
0
1
1
1
1
1
1
1
Read/Write
R/W
⎯
⎯
⎯
⎯
⎯
⎯
⎯
A/D status flag
0 Read Indicates the completion of A/D conversion
Write Stops A/D conversion
1 Read Indicates A/D conversion in progress
Write Starts A/D conversion
Rev.3.00 Jul. 19, 2007 page 490 of 532
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Appendix B Internal I/O Registers
PMR1—Port mode register 1
Bit
H'C8
I/O ports
7
6
5
4
3
2
1
0
IRQ3
IRQ2*
IRQ1
PWM*
⎯
TMOFH
TMOFL
TMOW
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
⎯
R/W
R/W
R/W
P10 /TMOW pin function switch
0 Functions as P10 I/O pin
1 Functions as TMOW output pin
P11 /TMOFL pin function switch
0 Functions as P11 I/O pin
1 Functions as TMOFL output pin
P12 /TMOFH pin function switch
0 Functions as P12 I/O pin
1 Functions as TMOFH input pin
P14 /PWM pin function switch
0 Functions as P14 I/O pin
1 Functions as PWM output pin
P15 /IRQ 1 /TMIB pin function switch
0 Functions as P15 I/O pin
1 Functions as IRQ 1 /TMIB input pin
P16 /IRQ 2 /TMIC pin function switch
0 Functions as P16 I/O pin
1 Functions as IRQ 2 /TMIC input pin
P17 /IRQ 3 /TMIF pin function switch
0 Functions as P17 I/O pin
1 Functions as IRQ 3 /TMIF input pin
Note: * IRQ2 and PWM are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and must always be cleared to 0.
Rev.3.00 Jul. 19, 2007 page 491 of 532
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Appendix B Internal I/O Registers
PMR2—Port mode register 2
Bit
H'C9
7
6
5
4
I/O ports
3
2
1
0
UD*
IRQ4
⎯
⎯
⎯
⎯
IRQ0
POF1*
Initial value
1
1
0
0
0
0
0
0
Read/Write
⎯
⎯
R/W
R/W
R/W
R/W
R/W
R/W
P20 /IRQ 4 /ADTRG pin function switch
0 Functions as P20 I/O pin
1 Functions as IRQ 4 /ADTRG input pin
P21 /UD pin function switch
0 Functions as P21 I/O pin
1 Functions as UD input pin
P32 /SO 1 pin PMOS control
0 CMOS output
1 NMOS open-drain output
P43 /IRQ 0 pin function switch
0 Functions as P4 3 input pin
1 Functions as IRQ 0 input pin
Note: * POF1 and UD are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and must always be cleared to 0.
Rev.3.00 Jul. 19, 2007 page 492 of 532
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Appendix B Internal I/O Registers
PMR3—Port mode register 3
Bit
H'CA
I/O ports
(H8/3857 Group only)
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
SO1
SI1
SCK1
Initial value
0
0
0
0
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
P3 0 /SCK 1 pin function switch
0 Functions as P3 0 I/O pin
1 Functions as SCK 1 I/O pin
P3 1 /SI 1 pin function switch
0 Functions as P3 1 I/O pin
1 Functions as SI 1 input pin
P3 2 /SO 1 pin function switch
0 Functions as P3 2 I/O pin
1 Functions as SO 1 output pin
PMR4—Port mode register 4
Bit
7
H'CB
6
5
4
3
2
I/O ports
1
0
NMOD7 NMOD6 NMOD5 NMOD4 NMOD3 NMOD2 NMOD1 NMOD0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0 P2 n has CMOS output
1 P2 n has NMOS open-drain output
Rev.3.00 Jul. 19, 2007 page 493 of 532
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Appendix B Internal I/O Registers
PMR5—Port mode register 5
H'CC
I/O ports
7
6
5
4
3
2
1
0
WKP7
WKP6
WKP5
WKP4
WKP3
WKP2
WKP1
WKP0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
P5n /WKPn pin function switch
0 Functions as P5 n I/O pin
1 Functions as WKPn input pin
PWCR—PWM control register
Bit
H'D0
14-bit PWM
(H8/3857 Group only)
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
⎯
⎯
PWCR0
Initial value
1
1
1
1
1
1
1
0
Read/Write
⎯
⎯
⎯
⎯
⎯
⎯
⎯
W
Clock select
0 The input clock is φ/2 (tφ* = 2/φ). The conversion period is 16,384/φ,
with a minimum modulation width of 1/φ
1 The input clock is φ/4 (tφ* = 4/φ). The conversion period is 32,768/φ,
with a minimum modulation width of 2/φ
Note: * tφ: Period of PWM input clock
PWDRU—PWM data register U
Bit
7
6
⎯
⎯
H'D1
5
4
3
14-bit PWM
(H8/3857 Group only)
2
1
0
PWDRU5 PWDRU4PWDRU3 PWDRU2 PWDUR1 PWDRU0
Initial value
1
1
0
0
0
0
0
0
Read/Write
⎯
⎯
W
W
W
W
W
W
Upper 6 bits of data for generating PWM waveform
Rev.3.00 Jul. 19, 2007 page 494 of 532
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Appendix B Internal I/O Registers
PWDRL—PWM data register L
Bit
7
6
H'D2
5
4
3
14-bit PWM
(H8/3857 Group only)
2
1
0
PWDRL7 PWDRL6 PWDRL5 PWDRL4 PWDRL3 PWDRL2 PWDRL1 PWDRL0
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Lower 8 bits of data for generating PWM waveform
PDR1—Port data register 1
Bit
H'D4
I/O ports
7
6
5
4
3
2
1
0
P17
P16*
P15
P14*
P13*
P12
P11
P10
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Note: * P16, P14, and P13 are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and must always be set to 1.
PDR2—Port data register 2
Bit
H'D5
I/O ports
7
6
5
4
3
2
1
0
P27
P26
P25
P24
P23
P22
P21
P20
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR3—Port data register 3
Bit
H'D6
I/O ports
(H8/3857 Group only)
7
6
5
4
3
2
1
0
P37
P36
P35
P34
P33
P32
P31
P30
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Rev.3.00 Jul. 19, 2007 page 495 of 532
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Appendix B Internal I/O Registers
PDR4—Port data register 4
Bit
H'D7
7
6
5
4
I/O ports
3
2
1
0
⎯
⎯
⎯
⎯
P43
P42
P41
P40
Initial value
1
1
1
1
Undefined
0
0
0
Read/Write
⎯
⎯
⎯
⎯
R
R/W
R/W
R/W
PDR5—Port data register 5
Bit
H'D8
I/O ports
7
6
5
4
3
2
1
0
P5 7
P56
P55
P54
P53
P52
P51
P50
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDR9—Port data register 9
Bit
H'DC
I/O ports
7
6
5
4
3
2
1
0
P9 7
P96
P95
P94
P93
P92
P91
P90
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PDRA—Port data register A
Bit
H'DD
I/O ports
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
PA3
PA2
PA1
PA0
Initial value
0
0
0
0
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
PDRB—Port data register B
Bit
Read/Write
7
H'DE
6
5
4
3
2
1
0
PB2*
PB1*
PB0*
R
R
R
PB7
PB6
PB5
PB4
PB3*
R
R
R
R
R
Note: * PB3 to PB0 are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved.
Rev.3.00 Jul. 19, 2007 page 496 of 532
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I/O ports
Appendix B Internal I/O Registers
PUCR1—Port pull-up control register 1
Bit
7
6
5
H'E0
4
3
I/O ports
2
1
0
PUCR17 PUCR16* PUCR15 PUCR14* PUCR13* PUCR12 PUCR11 PUCR10
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Note: * PUCR16, PUCR14, and PUCR13 are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and must always be cleared to 0.
PUCR3—Port pull-up control register 3
Bit
7
6
5
H'E1
4
3
I/O ports
(H8/3857 Group only)
2
0
1
PUCR3 7 PUCR36 PUCR35 PUCR34 PUCR33 PUCR32 PUCR31 PUCR30
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PUCR5—Port pull-up control register 5
Bit
7
6
5
H'E2
4
3
I/O ports
2
0
1
PUCR5 7 PUCR56 PUCR55 PUCR54 PUCR53 PUCR52 PUCR51 PUCR50
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
PCR1—Port control register 1
Bit
H'E4
7
6
5
PCR17
PCR16*
PCR15
Initial value
0
0
0
0
Read/Write
W
W
W
W
4
I/O ports
2
1
0
PCR12
PCR11
PCR10
0
0
0
0
W
W
W
W
3
PCR14* PCR13*
Port 1 input/output select
0 Input pin
1 Output pin
Note: * PCR16, PCR14, and PCR13 are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and must always be cleared to 0.
Rev.3.00 Jul. 19, 2007 page 497 of 532
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Appendix B Internal I/O Registers
PCR2—Port control register 2
Bit
H'E5
I/O ports
7
6
5
4
3
2
1
0
PCR27
PCR26
PCR25
PCR24
PCR23
PCR22
PCR21
PCR20
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Port 2 input/output select
0 Input pin
1 Output pin
PCR3—Port control register 3
Bit
H'E6
I/O ports
(H8/3857 Group only)
7
6
5
4
3
2
1
0
PCR37
PCR36
PCR35
PCR34
PCR33
PCR32
PCR31
PCR30
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Port 3 input/output select
0 Input pin
1 Output pin
PCR4—Port control register 4
Bit
H'E7
I/O ports
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
PCR42
PCR41
PCR40
Initial value
1
1
1
1
1
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
W
W
W
Port 4 input/output select
0 Input pin
1 Output pin
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Appendix B Internal I/O Registers
PCR5—Port control register 5
Bit
H'E8
I/O ports
7
6
5
4
3
2
1
0
PCR57
PCR56
PCR55
PCR54
PCR53
PCR52
PCR51
PCR50
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Port 5 input/output select
0 Input pin
1 Output pin
PCR9—Port control register 9
Bit
H'EC
I/O ports
7
6
5
4
3
2
1
0
PCR97
PCR96
PCR95
PCR94
PCR93
PCR92
PCR91
PCR90
Initial value
0
0
0
0
0
0
0
0
Read/Write
W
W
W
W
W
W
W
W
Port 9 input/output select
0 Input pin
1 Output pin
PCRA—Port control register A
Bit
H'ED
I/O ports
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
PCRA 3
PCRA 2
PCRA 1
PCRA 0
Initial value
1
1
1
1
0
0
0
0
Read/Write
⎯
⎯
⎯
⎯
W
W
W
W
Port A input/output select
0 Input pin
1 Output pin
Rev.3.00 Jul. 19, 2007 page 499 of 532
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Appendix B Internal I/O Registers
SYSCR1—System control register 1
Bit
H'F0
System control
7
6
5
4
3
2
1
0
SSBY
STS2
STS1
STS0
LSON
⎯
⎯
⎯
Initial value
0
0
0
0
0
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
⎯
⎯
⎯
Low speed on flag
0 The CPU operates on the system clock (φ)
1 The CPU operates on the subclock (φ SUB)
Standby timer select 2 to 0
0 0 0 Wait time = 8,192 states
1 Wait time = 16,384 states
1 0 Wait time = 32,768 states
1 Wait time = 65,536 states
1 * * Wait time = 131,072 states
Software standby
0 When a SLEEP instruction is executed in active mode, a transition is
made to sleep mode.
When a SLEEP instruction is executed in subactive mode, a transition is
made to subsleep mode.
1 When a SLEEP instruction is executed in active mode, a transition is
made to standby mode or watch mode.
When a SLEEP instruction is executed in subactive mode, a transition is
made to watch mode.
Legend: * Don't care
Rev.3.00 Jul. 19, 2007 page 500 of 532
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Appendix B Internal I/O Registers
SYSCR2—System control register 2
Bit
H'F1
System control
7
6
5
4
3
2
1
0
⎯
⎯
⎯
NESEL
DTON
MSON
SA1
SA0
Initial value
1
1
1
0
0
0
0
0
Read/Write
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
Medium speed on flag
0 Operates in active (high-speed) mode
1 Operates in active (medium-speed) mode
Subactive mode clock select
0 0 φ W/8
1 φ W/4
1 * φ W/2
Direct transfer on flag
0 When a SLEEP instruction is executed in active mode, a transition is
made to standby mode, watch mode, or sleep mode.
When a SLEEP instruction is executed in subactive mode, a transition is
made to watch mode or subsleep mode.
1 When a SLEEP instruction is executed in active (high-speed) mode, a direct
transition is made to active (medium-speed) mode if SSBY = 0, MSON = 1, and
LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and LSON = 1.
When a SLEEP instruction is executed in active (medium-speed) mode, a direct
transition is made to active (high-speed) mode if SSBY = 0, MSON = 0, and
LSON = 0, or to subactive mode if SSBY = 1, TMA3 = 1, and LSON = 1.
When a SLEEP instruction is executed in subactive mode, a direct
transition is made to active (high-speed) mode if SSBY = 1, TMA3 = 1, LSON = 0,
and MSON = 0, or to active (medium-speed) mode if SSBY = 1, TMA3 = 1,
LSON = 0, and MSON = 1.
Noise elimination sampling frequency select
0 Sampling rate is φ OSC /16
1 Sampling rate is φ OSC /4
Legend: * Don't care
Rev.3.00 Jul. 19, 2007 page 501 of 532
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Appendix B Internal I/O Registers
IEGR—IRQ edge select register
Bit
H'F2
7
6
5
4
System control
3
2
1
0
⎯
⎯
⎯
IEG4
IEG3
IEG2*
IEG1
IEG0
Initial value
1
1
1
0
0
0
0
0
Read/Write
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
IRQ 0 edge select
0 Falling edge of IRQ 0 pin input is detected
1 Rising edge of IRQ 0 pin input is detected
IRQ 1 edge select
0 Falling edge of IRQ 1 /TMIB pin input is detected
1 Rising edge of IRQ 1 /TMIB pin input is detected
IRQ 2 edge select
0 Falling edge of IRQ 2 /TMIC pin input is detected
1 Rising edge of IRQ 2 /TMIC pin input is detected
IRQ 3 edge select
0 Falling edge of IRQ 3 /TMIF pin input is detected
1 Rising edge of IRQ 3 /TMIF pin input is detected
IRQ 4 edge select
0 Falling edge of IRQ 4 /ADTRG pin input is detected
1 Rising edge of IRQ 4 /ADTRG pin input is detected
Note: * IEG2 is a function of the H8/3857 Group only.
In the H8/3854 Group this bit is reserved, and must always be cleared to 0.
Rev.3.00 Jul. 19, 2007 page 502 of 532
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Appendix B Internal I/O Registers
IENR1—Interrupt enable register 1
Bit
H'F3
System control
7
6
5
4
3
2
1
0
IENTA
IENS1*
IENWP
IEN4
IEN3
IEN2*
IEN1
IEN0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
IRQ 4 to IRQ 0 interrupt enable
0 Disables interrupt request IRQ n
1 Enables interrupt request IRQ n
Note: n = 4 to 0
Wakeup interrupt enable
0 Disables interrupt requests from WKP7 to WKP0
1 Enables interrupt requests from WKP7 to WKP0
SCI1 interrupt enable
0 Disables SCI1 interrupts
1 Enables SCI1 interrupts
Timer A interrupt enable
0 Disables timer A interrupts
1 Enables timer A interrupts
Note: * IENS1 and IEN2 are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and must always be cleared to 0.
Rev.3.00 Jul. 19, 2007 page 503 of 532
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Appendix B Internal I/O Registers
IENR2—Interrupt enable register 2
Bit
H'F4
7
6
5
4
IENDT
IENAD
⎯
⎯
Initial value
0
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
R/W
3
System control
1
0
IENTC*
IENTB
0
0
0
R/W
R/W
R/W
2
IENTFH IENTFL
Timer B interrupt enable
0 Disables timer B interrupts
1 Enables timer B interrupts
Timer C interrupt enable
0 Disables timer C interrupts
1 Enables timer C interrupts
Timer FL interrupt enable
0 Disables timer FL interrupts
1 Enables timer FL interrupts
Timer FH interrupt enable
0 Disables timer FH interrupts
1 Enables timer FH interrupts
A/D converter interrupt enable
0 Disables A/D converter interrupt requests
1 Enables A/D converter interrupt requests
Direct transfer interrupt enable
0 Disables direct transfer interrupt requests
1 Enables direct transfer interrupt requests
Note: * IENTC is a function of the H8/3857 Group only.
In the H8/3854 Group this bit is reserved, and must always be cleared to 0.
Rev.3.00 Jul. 19, 2007 page 504 of 532
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Appendix B Internal I/O Registers
IRR1—Interrupt request register 1
Bit
H'F6
7
6
5
4
System control
3
2
1
0
IRRTA
IRRS1*1
⎯
IRRI4
IRRI3
IRRI2*1
IRRI1
IRRI0
Initial value
0
0
1
0
0
0
0
0
Read/Write
R/W*2
R/W*2
⎯
R/W*2
R/W*2
R/W*2
R/W*2
R/W*2
IRQ 4 to IRQ 0 interrupt request flag
0 [Clearing conditions]
When IRRI4 = 1, it is cleared by writing 0
When 0 is written to IRRI4 when IRRI4 = 1
The same also applies to IRRI3—IRRI0
1 [Setting conditions]
When pin IRQ 4 is set to interrupt input and the designated signal edge is
detected
When pin IRQ4 is set to interrupt input and the designated edge is input at this pin
The same also applies to IRRI3—IRRI0
SCI1 interrupt request flag
0 [Clearing condition]
When IRRS1 = 1, it is cleared by writing 0
1 [Setting condition]
When an SCI1 transfer is completed
Timer A interrupt request flag
0 [Clearing condition]
When IRRTA = 1, it is cleared by writing 0
1 [Setting condition]
When the timer A counter overflows from H'FF to H'00
Notes: 1. IRRS1 and IRRI2 are functions of the H8/3857 Group only.
In the H8/3854 Group these bits are reserved, and are always 0.
2. Only a write of 0 for flag clearing is possible.
Rev.3.00 Jul. 19, 2007 page 505 of 532
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Appendix B Internal I/O Registers
IRR2—Interrupt request register 2
Bit
7
H'F7
6
5
4
3
2
System control
1
0
IRRTC*1
IRRTB
IRRDT
IRRAD
⎯
⎯
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W*2
R/W*2
⎯
⎯
R/W*2
R/W*2
R/W*2
R/W*2
IRRTFH IRRTFL
Timer B interrupt request flag
0 [Clearing condition] When IRRTB = 1, it is cleared by writing 0
1 [Setting condition] When the timer B counter overflows from
H'FF to H'00
Timer C interrupt request flag
0 [Clearing condition] When IRRTC = 1, it is cleared by writing 0
1 [Setting condition] When the timer C counter overflows from H'FF to H'00
or underflows from H'00 to H'FF
Timer FL interrupt request flag
0 [Clearing condition] When IRRTFL = 1, it is cleared by writing 0
1 [Setting condition] When counter FL matches output compare register FL
in 8-bit mode
Timer FH interrupt request flag
0 [Clearing condition] When IRRTFH = 1, it is cleared by writing 0
1 [Setting condition] When counter FH matches output compare register FH in
8-bit mode, or when 16-bit counter F (TCFL, TCFH)
matches 16-bit output compare register F (OCRFL,
OCRFH) in 16-bit mode
A/D converter interrupt request flag
0 [Clearing condition] When IRRAD = 1, it is cleared by writing 0
1 [Setting condition] When A/D conversion is completed and ADSF is reset
Direct transfer interrupt request flag
0 [Clearing condition] When IRRDT = 1, it is cleared by writing 0
1 [Setting condition] A SLEEP instruction is executed when DTON = 1 and a direct
transfer is made
Notes: 1. IRRTC is a function of the H8/3857 Group only.
In the H8/3854 Group this bit is reserved, and is always 0.
2. Only a write of 0 for flag clearing is possible.
Rev.3.00 Jul. 19, 2007 page 506 of 532
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Appendix B Internal I/O Registers
IWPR—Wakeup interrupt request register
Bit
H'F9
System control
7
6
5
4
3
2
1
0
IWPF7
IWPF6
IWPF5
IWPF4
IWPF3
IWPF2
IWPF1
IWPF0
Initial value
0
0
0
0
0
0
0
0
Read/Write
R/W *
R/W *
R/W *
R/W *
R/W *
R/W *
R/W *
R/W *
Wakeup interrupt request flag
0 [Clearing condition]
When IWPFn = 1, it is cleared by writing 0
1 [Setting condition]
When pin WKPn is set to interrupt input and a falling signal edge is detected
Note: n = 7 to 0
Note: * Only a write of 0 for flag clearing is possible.
Rev.3.00 Jul. 19, 2007 page 507 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
Appendix C I/O Port Block Diagrams
C.1
Block Diagram of Port 1
SBY (low level during reset and in standby mode)
Internal
data bus
PUCR1n*
VCC
VCC
PMR1n*
P1n
PDR1n*
VSS
PCR1n*
IRQ n – 4*
Timer B module
TMIB (P15)
Legend:
PDR1:
PCR1:
PMR1:
PUCR1:
Notes:
Port data register 1
Port control register 1
Port mode register 1
Port pull-up control register 1
Timer C module
TMIC (P16)*
Timer F module
TMIF (P17)
n = 7, 6*, or 5
* P16, the timer C module (TMIC), and n = 6 (PDR16, PCR16, PMR16, PUCR16, IRQ2) are functions
of the H8/3857 Group only, and are not provided in the H8/3854 Group.
Figure C.1 (a) Port 1 Block Diagram
(Pins P17 to P15: H8/3857 Group, Pins P17, P15: H8/3854 Group)
Rev.3.00 Jul. 19, 2007 page 508 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
PWM module
PWM
SBY
Internal
data bus
PUCR14
VCC
VCC
PMR14
P14
PDR14
VSS
Legend:
PDR1:
PCR1:
PMR1:
PUCR1:
PCR14
Port data register 1
Port control register 1
Port mode register 1
Port pull-up control register 1
Figure C.1 (b) Port 1 Block Diagram (Pin P14: Function of H8/3857 Group Only)
Rev.3.00 Jul. 19, 2007 page 509 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SBY
Internal
data bus
PUCR13
VCC
VCC
P13
PDR13
VSS
PCR13
Legend:
PDR1: Port data register 1
PCR1: Port control register 1
PUCR1: Port pull-up control register 1
Figure C.1 (c) Port 1 Block Diagram (Pin P13: Function of H8/3857 Group Only)
Rev.3.00 Jul. 19, 2007 page 510 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
Timer F module
TMOFH (P12 )
TMOFL (P1 1 )
SBY
Internal
data bus
PUCR1n
VCC
VCC
PMR1n
P1n
PDR1n
VSS
PCR1n
Legend:
PDR1:
PCR1:
PMR1:
PUCR1:
Port data register 1
Port control register 1
Port mode register 1
Port pull-up control register 1
Note:
n = 2 or 1
Figure C.1 (d) Port 1 Block Diagram (Pins P12 and P11)
Rev.3.00 Jul. 19, 2007 page 511 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
Timer A module
TMOW
SBY
Internal
data bus
PUCR10
VCC
VCC
PMR10
P10
PDR10
VSS
Legend:
PDR1:
PCR1:
PMR1:
PUCR1:
PCR10
Port data register 1
Port control register 1
Port mode register 1
Port pull-up control register 1
Figure C.1 (e) Port 1 Block Diagram (Pin P10)
Rev.3.00 Jul. 19, 2007 page 512 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
C.2
Block Diagram of Port 2
SBY
Internal
data bus
PMR4 n
VCC
P2n
PDR2 n
VSS
PCR2 n
Legend:
PDR2: Port data register 2
PCR2: Port control register 2
PMR4: Port mode register 4
Notes:
H8/3857 Group: n = 7 to 2
H8/3854 Group: n = 7 to 1
Figure C.2 (a) Port 2 Block Diagram
(Pins P27 to P22: H8/3857 Group; Pins P27 to P21: H8/3854 Group)
Rev.3.00 Jul. 19, 2007 page 513 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SBY
Internal
data bus
PMR4 1
VCC
PMR21
P21
PDR21
VSS
PCR21
Timer C module
UD
Legend:
PDR2: Port data register 2
PCR2: Port control register 2
PMR2: Port mode register 2
PMR4: Port mode register 4
Figure C.2 (b) Port 2 Block Diagram (Pin P21: H8/3857 Group)
Rev.3.00 Jul. 19, 2007 page 514 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SBY
Internal
data bus
PMR4 0
VCC
PMR2 0
P20
PDR20
VSS
PCR2 0
IRQ 4
A/D converter
module
Legend:
PDR2: Port data register 2
PCR2: Port control register 2
PMR2: Port mode register 2
PMR4: Port mode register 4
ADTRG
Figure C.2 (c) Port 2 Block Diagram (Pin P20)
Rev.3.00 Jul. 19, 2007 page 515 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
C.3
Block Diagram of Port 3 (H8/3857 Group Only)
SBY
PUCR3n
VCC
P3n
PDR3n
VSS
Internal data bus
VCC
PCR3n
Legend:
PDR3: Port data register 3
PCR3: Port control register 3
PUCR3: Port pull-up control register 3
Note:
n = 7 to 3
Figure C.3 (a) Port 3 Block Diagram (Pins P37 to P33: Functions of H8/3857 Group Only)
Rev.3.00 Jul. 19, 2007 page 516 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SCI1 module
SO 1
SBY
PMR2 2
Internal
data bus
PUCR32
VCC
VCC
PMR3 2
P3 2
PDR3 2
VSS
Legend:
PDR3:
PCR3:
PMR3:
PMR2:
PUCR3:
PCR3 2
Port data register 3
Port control register 3
Port mode register 3
Port mode register 2
Port pull-up control register 3
Figure C.3 (b) Port 3 Block Diagram (Pin P32: Function of H8/3857 Group Only)
Rev.3.00 Jul. 19, 2007 page 517 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SBY
PUCR31
VCC
PMR31
P31
PDR31
VSS
Internal data bus
VCC
PCR31
SCI1 module
SI1
Legend:
PDR3: Port data register 3
PCR3: Port control register 3
PMR3: Port mode register 3
PUCR3: Port pull-up control register 3
Figure C.3 (c) Port 3 Block Diagram (Pin P31: Function of H8/3857 Group Only)
Rev.3.00 Jul. 19, 2007 page 518 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SCI1 module
EXCK
SCKO
SBY
SCKI
PUCR30
VCC
VCC
P30
PDR30
VSS
Legend:
PDR3:
PCR3:
PMR3:
PUCR3:
Internal data bus
PMR30
PCR30
Port data register 3
Port control register 3
Port mode register 3
Port pull-up control register 3
Figure C.3 (d) Port 3 Block Diagram (Pin P30: Function of H8/3857 Group Only)
Rev.3.00 Jul. 19, 2007 page 519 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
C.4
Block Diagram of Port 4
Internal
data bus
PMR2 3
P4 3
IRQ 0
Legend:
PMR2: Port mode register 2
Figure C.4 (a) Port 4 Block Diagram (Pin P43)
SBY
SCI3 module
VCC
TE
TXD
P4 2
PDR4 2
Internal
data bus
VSS
PCR4 2
Legend:
PDR4: Port data register 4
PCR4: Port control register 4
Figure C.4 (b) Port 4 Block Diagram (Pin P42)
Rev.3.00 Jul. 19, 2007 page 520 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SBY
SCI3 module
VCC
RE
RXD
P4 1
VSS
PCR4 1
Internal data bus
PDR4 1
Legend:
PDR4: Port data register 4
PCR4: Port control register 4
Figure C.4 (c) Port 4 Block Diagram (Pin P41)
Rev.3.00 Jul. 19, 2007 page 521 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
SBY
SCI3 module
SCKIE
SCKOE
SCKO
SCKI
VCC
P4 0
VSS
PCR4 0
Legend:
PDR4: Port data register 4
PCR4: Port control register 4
Figure C.4 (d) Port 4 Block Diagram (Pin P40)
Rev.3.00 Jul. 19, 2007 page 522 of 532
REJ09B0397-0300
Internal data bus
PDR4 0
Appendix C I/O Port Block Diagrams
C.5
Block Diagram of Port 5
SBY
Internal
data bus
PUCR5n
VCC
VCC
PMR5 n
P5 n
PDR5n
VSS
PCR5n
WKPn
Legend:
PDR5:
PCR5:
PMR5:
PUCR5:
Port data register 5
Port control register 5
Port mode register 5
Port pull-up control register 5
Note:
n = 7 to 0
Figure C.5 Port 5 Block Diagram
Rev.3.00 Jul. 19, 2007 page 523 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
C.6
Block Diagram of Port 9
SBY
Internal
data bus
VCC
P9 n
PDR9n
VSS
PCR9n
Legend:
PDR9: Port data register 9
PCR9: Port control register 9
Note:
n = 7 to 0
Figure C.6 Port 9 Block Diagram
Rev.3.00 Jul. 19, 2007 page 524 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
C.7
Block Diagram of Port A
SBY
Internal
data bus
VCC
PDRA n
PA n
PCRA n
VSS
Legend:
PDRA: Port data register A
PCRA: Port control register A
Note:
n = 3 to 0
Figure C.7 Port A Block Diagram
Rev.3.00 Jul. 19, 2007 page 525 of 532
REJ09B0397-0300
Appendix C I/O Port Block Diagrams
C.8
Block Diagram of Port B
Internal
data bus
PBn
A/D module
DEC
AMR0 to AMR3
V IN
Notes:
H8/3857 Group: n = 7 to 0
H8/3854 Group: n = 7 to 4
Figure C.8 Port B Block Diagram
(Pins PB7 to PB0: H8/3857 Group, Pins PB7 to PB4: H8/3854 Group)
Rev.3.00 Jul. 19, 2007 page 526 of 532
REJ09B0397-0300
Appendix D Port States in the Different Processing States
Appendix D Port States in the Different Processing States
Table D.1
Port States Overview
Port
Reset
Sleep
1
Subsleep Standby
Watch
Subactive Active
P17 to P10* High
Retained
impedance
Retained
High
Retained
impedance*2
Functions
Functions
P27 to P20
High
Retained
impedance
Retained
High
impedance
Retained
Functions
Functions
P37 to P30*1 High
Retained
impedance
Retained
High
Retained
impedance*2
Functions
Functions
P43 to P40
High
Retained
impedance
Retained
High
impedance
Retained
Functions
Functions
P57 to P50
High
Retained
impedance
Retained
High
Retained
2
impedance*
Functions
Functions
P97 to P90
High
Retained
impedance
Retained
High
impedance
Retained
Functions
Functions
PA3 to PA0
High
Retained
impedance
Retained
High
impedance
Retained
Functions
Functions
PB7 to PB0*1 High
High
High
High
impedance impedance impedance impedance
High
High
High
impedance impedance impedance
Notes: 1. P16, P14, P13, P37 to P30, and PB3 to PB0 are functions of the H8/3857 Group only, and
are not provided in the H8/3854 Group.
2. High level output when MOS pull-up is in on state.
Rev.3.00 Jul. 19, 2007 page 527 of 532
REJ09B0397-0300
Appendix E List of Product Codes
Appendix E List of Product Codes
Table E.1
H8/3857 Group Product Code Lineup
Product Type
H8/3857F F-ZTAT
versions
Part No.
Standard HD64F3857FQ HD64F3857FQ
models
HD64F3857TG HD64F3857TG
HCD64F3857
H8/3857
H8/3854F F-ZTAT
versions
Part No.
Die
⎯
Die
⎯
Die
Mask Code
⎯
Package
100-pin QFP (FP-100B)
100-pin TQFP (TFP-100G)
Die
Mask ROM Standard HD6433854H HD6433854(***)H 100-pin QFP (FP-100B)
versions* models
HD6433854W HD6433854(***)W 100-pin TQFP (TFP-100G)
HCD6433854
⎯
Die
Mask ROM Standard HD6433853H HD6433853(***)H 100-pin QFP (FP-100B)
versions* models
HD6433853W HD6433853(***)W 100-pin TQFP (TFP-100G)
HCD6433853
H8/3852
⎯
Standard HD64F3854H HD64F3854H
models
HD64F3854W HD64F3854W
HCD64F3854
H8/3853
Die
H8/3854 Group Product Code Lineup
Product Type
H8/3854
144-pin TQFP (TFP-144)
Mask ROM Standard HD6433855FQ HD6433855(***)FQ 144-pin QFP (FP-144H)
versions
models
HD6433855TG HD6433855(***)TG 144-pin TQFP (TFP-144)
HCD6433855
Table E.2
144-pin QFP (FP-144H)
Mask ROM Standard HD6433856FQ HD6433856(***)FQ 144-pin QFP (FP-144H)
versions
models
HD6433856TG HD6433856(***)TG 144-pin TQFP (TFP-144)
HCD6433856
H8/3855
⎯
Package
Mask ROM Standard HD6433857FQ HD6433857(***)FQ 144-pin QFP (FP-144H)
versions
models
HD6433857TG HD6433857(***)TG 144-pin TQFP (TFP-144)
HCD6433857
H8/3856
Mask Code
⎯
Die
Mask ROM Standard HD6433852H HD6433852(***)H 100-pin QFP (FP-100B)
versions* models
HD6433852W HD6433852(***)W 100-pin TQFP (TFP-100G)
HCD6433852
⎯
Notes: For mask ROM versions, (***) is the ROM code.
* Under development
Rev.3.00 Jul. 19, 2007 page 528 of 532
REJ09B0397-0300
Die
Appendix F Package Dimensions
Appendix F Package Dimensions
The package dimention that is shown in the Renesas Semiconductor Package Data Book has
priority.
JEITA Package Code
P-LQFP144-20x20-0.50
RENESAS Code
PLQP0144KC-A
Previous Code
FP-144H/FP-144HV
MASS[Typ.]
1.4g
HD
*1
D
108
73
109
NOTE)
1. DIMENSIONS"*1"AND"*2"
DO NOT INCLUDE MOLD FLASH
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
72
bp
c
c1
HE
*2
E
b1
Reference Dimension in Millimeters
Symbol
Terminal cross section
ZE
Min
37
144
36
Index mark
c
A
ZD
A2
1
F
θ
A1
L
L1
e
*3
y
bp
Detail F
x
M
D
E
A2
HD
HE
A
A1
bp
b1
c
c1
θ
e
x
y
ZD
ZE
L
L1
Nom Max
20
20
1.45
21.7 22.0 22.3
21.7 22.0 22.3
1.70
0.04 0.12 0.20
0.17 0.22 0.27
0.20
0.12 0.17 0.22
0.15
0°
8°
0.5
0.08
0.10
1.25
1.25
0.4 0.5 0.6
1.0
Figure F.1 FP-144H Package Dimensions
Rev.3.00 Jul. 19, 2007 page 529 of 532
REJ09B0397-0300
Appendix F Package Dimensions
JEITA Package Code
P-TQFP144-16x16-0.40
RENESAS Code
PTQP0144LC-A
Previous Code
TFP-144/TFP-144V
MASS[Typ.]
0.6g
HD
*1
D
108
73
109
NOTE)
1. DIMENSIONS"*1"AND"*2"
DO NOT INCLUDE MOLD FLASH
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
72
HE
b1
c
c1
*2
E
bp
ZE
Reference Dimension in Millimeters
Symbol
37
144
Terminal cross section
1
36
ZD
Index mark
c
A2
A
F
θ
*3
y
bp
L
A1
e
x
M
L1
Detail F
Figure F.2 TFP-144 Package Dimensions
Rev.3.00 Jul. 19, 2007 page 530 of 532
REJ09B0397-0300
D
E
A2
HD
HE
A
A1
bp
b1
c
c1
θ
e
x
y
ZD
ZE
L
L1
Min Nom Max
16
16
1.00
17.8 18.0 18.2
17.8 18.0 18.2
1.20
0.05 0.10 0.15
0.13 0.18 0.23
0.16
0.12 0.17 0.22
0.15
8°
0°
0.4
0.07
0.08
1.0
1.0
0.4 0.5 0.6
1.0
Appendix F Package Dimensions
JEITA Package Code
P-QFP100-14x14-0.50
RENESAS Code
PRQP0100KA-A
Previous Code
FP-100B/FP-100BV
MASS[Typ.]
1.2g
HD
*1
D
75
51
76
NOTE)
1. DIMENSIONS"*1"AND"*2"
DO NOT INCLUDE MOLD FLASH
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
50
bp
c
c1
HE
*2
E
b1
ZE
Terminal cross section
26
100
1
25
c
F
A2
A
ZD
θ
A1
L
L1
Detail F
e
*3
y
bp
x
M
Reference Dimension in Millimeters
Symbol
Min
D
E
A2
HD
HE
A
A1
bp
b1
c
c1
θ
e
x
y
ZD
ZE
L
L1
Nom Max
14
14
2.70
15.7 16.0 16.3
15.7 16.0 16.3
3.05
0.00 0.12 0.25
0.17 0.22 0.27
0.20
0.12 0.17 0.22
0.15
0°
8°
0.5
0.08
0.10
1.0
1.0
0.3 0.5 0.7
1.0
Figure F.3 FP-100B Package Dimensions
Rev.3.00 Jul. 19, 2007 page 531 of 532
REJ09B0397-0300
Appendix F Package Dimensions
JEITA Package Code
P-TQFP100-12x12-0.40
RENESAS Code
PTQP0100LC-A
Previous Code
MASS[Typ.]
TFP-100G/TFP-100GV
0.4g
HD
*1
D
75
NOTE)
1. DIMENSIONS"*1"AND"*2"
DO NOT INCLUDE MOLD FLASH
2. DIMENSION"*3"DOES NOT
INCLUDE TRIM OFFSET.
51
76
50
HE
b1
Reference Dimension in Millimeters
Symbol
c
c1
*2
E
bp
Min
26
Terminal cross section
ZE
100
1
25
Index mark
c
A2
F
A
ZD
θ
*3
y
bp
L
A1
e
x
L1
M
Detail F
Figure F.4 TFP-100G Package Dimensions
Rev.3.00 Jul. 19, 2007 page 532 of 532
REJ09B0397-0300
D
E
A2
HD
HE
A
A1
bp
b1
c
c1
θ
e
x
y
ZD
ZE
L
L1
Nom Max
12
12
1.00
13.8 14.0 14.2
13.8 14.0 14.2
1.20
0.00 0.10 0.20
0.13 0.18 0.23
0.16
0.12 0.17 0.22
0.15
0°
8°
0.4
0.07
0.10
1.2
1.2
0.4 0.5 0.6
1.0
Renesas 8-Bit Single-Chip Microcomputer
Hardware Manual
H8/3857 Group, H8/3857 F-ZTAT™,
H8/3854 Group, H8/3854 F-ZTAT™
Publication Date: 1st Edition, March 1999
Rev.3.00, July 19, 2007
Published by:
Sales Strategic Planning Div.
Renesas Technology Corp.
Edited by:
Customer Support Department
Global Strategic Communication Div.
Renesas Solutions Corp.
© 2007. Renesas Technology Corp., All rights reserved. Printed in Japan.
Sales Strategic Planning Div.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
RENESAS SALES OFFICES
http://www.renesas.com
Refer to "http://www.renesas.com/en/network" for the latest and detailed information.
Renesas Technology America, Inc.
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Tel: <1> (408) 382-7500, Fax: <1> (408) 382-7501
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Tel: <44> (1628) 585-100, Fax: <44> (1628) 585-900
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Tel: <886> (2) 2715-2888, Fax: <886> (2) 2713-2999
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Tel: <65> 6213-0200, Fax: <65> 6278-8001
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Tel: <603> 7955-9390, Fax: <603> 7955-9510
Colophon 6.0
H8/3857 Group, H8/3857 F-ZTAT™,
H8/3854 Group, H8/3854 F-ZTAT™
Hardware Manual
2-6-2, Ote-machi, Chiyoda-ku, Tokyo, 100-0004, Japan