Renesas M38068MAXXXFP Single-chip 8-bit cmos microcomputer Datasheet

To all our customers
Regarding the change of names mentioned in the document, such as Mitsubishi
Electric and Mitsubishi XX, to Renesas Technology Corp.
The semiconductor operations of Hitachi and Mitsubishi Electric were transferred to Renesas
Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog
and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.)
Accordingly, although Mitsubishi Electric, Mitsubishi Electric Corporation, Mitsubishi
Semiconductors, and other Mitsubishi brand names are mentioned in the document, these names
have in fact all been changed to Renesas Technology Corp. Thank you for your understanding.
Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been
made to the contents of the document, and these changes do not constitute any alteration to the
contents of the document itself.
Note : Mitsubishi Electric will continue the business operations of high frequency & optical devices
and power devices.
Renesas Technology Corp.
Customer Support Dept.
April 1, 2003
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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DESCRIPTION
The 3807 group is a 8-bit microcomputer based on the 740 family
core technology.
The 3807 group has two serial I/Os, an A-D converter, a D-A
converter, a real time output port function, a watchdog timer, and an
analog comparator, which are available for a system controller which
controls motors of office equipment and household appliances.
The various microcomputers in the 3807 group include variations of
internal memory size and packaging. For details, refer to the section
on part numbering.
For details on availability of microcomputers in the 3807 group, refer
to the section on group expansion.
•
FEATURES
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Basic machine-language instructions ....................................... 71
The minimum instruction execution time ............................ 0.5 µs
(at 8 MHz oscillation frequency)
Memory size .................................................................................
ROM ................................................ 8 to 60 K bytes
RAM ............................................ 384 to 2048 bytes
Programmable input/output ports ............................................. 68
Software pull-up resistors (Ports P0 to P2) .............................. 24
Input ports (Ports P63 and P6 4) ................................................. 2
Interrupts .................................................. 20 sources, 16 vectors
Timers X, Y .................................................................. 16-bit ✕ 2
Timers A, B (for real time output port function) ............ 16-bit ✕ 2
Timers 1–3 ..................................................................... 8-bit ✕ 3
•
•
•
Serial I/O1 (UART or Clock-synchronized) .................... 8-bit ✕ 1
Serial I/O2 (Clock-synchronized) ................................... 8-bit ✕ 1
A-D converter ................................................ 8-bit ✕ 13 channels
D-A converter .................................................. 8-bit ✕ 4 channels
Watchdog timer ............................................................ 16-bit ✕ 1
Analog comparator ........................................................ 1 channel
2 Clock generating circuit
Main clock (XIN–XOUT ) .......................... Internal feedback resistor
Sub-clock (XCIN–XCOUT) .......... Without internal feedback resistor
(connect to external ceramic resonator or quartz-crystal oscillator)
Power source voltage
In high-speed mode ................................................... 4.0 to 5.5 V
(at 8 MHz oscillation frequency and high-speed selected)
In middle-speed mode ................................................ 2.7 to 5.5 V
(at 8 MHz oscillation frequency and middle-speed selected)
In low-speed mode ..................................................... 2.7 to 5.5 V
(at 32 kHz oscillation frequency and low-speed selected)
Power dissipation
In high-speed mode ......................................................... 34 m W
(at 8 MHz oscillation frequency, at 5 V power source voltage)
In low-speed mode ............................................................. 60 µW
(at 32 kHz oscillation frequency, at 3 V power source voltage)
Memory expansion .......................................................... possible
Operating temperature range ................................... –20 to 85 °C
APPLICATION
LBP engine control, PPC, FAX, office equipment, household appliances, consumer electronics, etc.
42
41
43
44
45
46
47
48
49
50
51
52
53
55
54
56
57
58
60
59
61
62
65
40
66
39
67
38
68
37
69
36
70
35
71
34
33
72
M38073M4-XXXFP
73
74
32
31
75
30
76
29
77
28
78
27
79
80
26
21
22
23
24
13
14
15
16
17
18
19
20
11
12
10
P62/AN7
P61/AN6
P60/AN5
P77/AN4
P76/AN3
P75/AN2
P74/AN1
P73/SRDY2/ADT/AN0
P72/SCLK2
P71/SOUT2
P70/SIN2
P57/DA2
P56/DA1
P55/CNTR1
P54/CNTR0
P53/INT4
P52/INT3
P51/SCMP2/INT2
P50/TOUT
P47/SRDY1
P46/SCLK1
P45/TXD
P44/RXD
P43/INT1
5
6
7
8
9
25
1
2
3
4
P87/RTP5
P86/RTP4
P85/RTP3
P84/RTP2
P83/RTP1
P82/RTP0
P81/DA4/AN12
P80/DA3/AN11
VCC
ADVREF
AVSS
P65/DAVREF/AN10
P64/CMPREF /AN9
P63/CMPIN /AN8
CMPOUT
CMPVCC
63
64
P30/RTP6
P31/RTP7
P32/ONW
P33/RESETOUT
P34/CKOUT/φ
P35/SYNC
P36/WR
P37/RD
P00/AD0
P01/AD1
P02/AD2
P03/AD3
P04/AD4
P05/AD5
P06/AD6
P07/AD7
P10/AD8
P11/AD9
P12/AD10
P13/AD11
P14/AD12
P15/AD13
P16/AD14
P17/AD15
PIN CONFIGURATION (TOP VIEW)
Package type : 80P6N-A
80-pin plastic-molded QFP
Fig. 1. Pin configuration of M38073M4-XXXFP
P20/DB0
P21/DB1
P22/DB2
P23/DB3
P24/DB4
P25/DB5
P26/DB6
P27/DB7
VSS
XOUT
XIN
P40/XCOUT
P41/XCIN
RESET
CNVSS
P42/INT0
2
Fig. 2. Functional block diagram
79
CMPOUT
RTP0 –
D-A
4 5 6 7 8 9 10 11
I/O port P 7
I/O port P 8
SCMP2
65 66 67 68 69 70 71 72
(8)
SI/O2(8)
74 75
DAVREF
(8)
ROM
AVSS
P6(8)
D-A
converter 2
(8)
I/O port P 6
1 2 3
CMPIN
CMPREF
76 77 78
A-D
converter
ADVREF
CMPREF
P7(8)
(8)
converter 4 converter 3
D-A
Analog
comparator
CMPIN
XCOUT
Clock generating circuit
XCIN
P8(8)
RTP5
80
CMPVCC
RAM
SS
I/O port P 5
CC
PS
PC L
S
Y
X
A
TOUT
INT2 –
INT4
P4(8)
I/O port P 4
I/O port P 3
I/O port P 2
I/O port P 1
33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
P1(8)
Timer B (16)
Timer A (16)
Timer Y (16)
P0(8)
TOUT
I/O port P 0
49 50 51 52 53 54 55 56
Timer 2 (8)
Timer 3 (8)
Timer X (16)
P2(8)
CNTR1
CNTR0
RTP0 – INT4
RTP5
RTP
57 58 59 60 61 62 63 64
P3(8)
INT1
INT0
26
27
Timer 1 (8)
CNVSS
RESET
Reset input
INT0, XCIN
INT1 XCOUT
20 21 22 23 24 25 28 29
SI/O1(8)
C P U
73
V
SCMP2
PC H
12 13 14 15 16 17 18 19
P5(8)
D-A
converter 1
(8)
32
31
30
Sub–clock Sub–clock
output
input
V
X OUT
X IN
Main clock Main clock
input
output
FUNCTIONAL BLOCK DIAGRAM (Package : 80P6N)
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FUNCTIONAL BLOCK
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Table. 1. Pin description (1)
Pin
VCC, VSS
CMPVCC
CNVSS
ADVREF
AVSS
CMPOUT
______
RESET
XIN
Name
Function
Function except a port function
Power source
• Apply voltage of 2.7–5.5 V to VCC, and 0 V to VSS.
Analog comparator • Power source input pin for an analog comparator
power source
CNVSS
• This pin controls the operation mode of the chip.
• Normally connected to VSS.
Analog reference
voltage
Analog power
source
• If this pin is connected to VCC, the internal ROM is inhibited and external memory is accessed.
• Reference voltage input pin for A-D converter.
• Analog power source input pin for A-D and D-A converter and an analog comparator
• Connect to VSS.
Analog comparator • Output pin for an analog comparator
output
Reset input
• Reset input pin for active “L”
Clock input
• Input and output signals for the internal clock generating circuit.
• Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set the oscillation frequency.
XOUT
Clock output
P00–P0 7
P10–P17
P20–P27
I/O port P0
I/O port P1
I/O port P2
• If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.
• The clock is used as the oscillating source of system clock.
• 8-bit CMOS I/O port
• I/O direction register allows each pin to be individually programmed as either input or output.
• At reset this port is set to input mode.
• In modes other than single-chip, these pins are used as address, data bus I/O pins.
• CMOS compatible input level
• CMOS 3-state output structure
• Port P2 can be switched CMOS or TTL input level.
P30/RTP 6,
P31/RTP 7
I/O port P3
• 8-bit CMOS I/O port
• I/O direction register allows each pin to be individually programmed as either input or output.
• Real time port function
pins
P34/CKOUT ,
P32, P33,
P35–P37
• At reset this port is set to input mode.
• Clock output function pin
• In modes other than single-chip, these pins are used as control bus I/O pins.
• CMOS compatible input level
• CMOS 3-state output structure
• Port P32 can be switched CMOS or TTL input level.
P40/X COUT, I/O port P4
P41/X CIN
P42/INT 0,
P43/INT 1
• 8-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
• CMOS 3-state output structures
P44/RXD,
P45/TXD,
P46/S CLK1,
P47/SRDY1
P50/T OUT
P51/S CMP2/
INT2
P52/INT3,
P53/INT4
P54/CNTR0,
P55/CNTR1
P56/DA1,
P57/DA2
• Sub-clock generating I/O
pins(connect a resonator)
• Interrupt input pins
• Timer X, Timer Y function pins
(INT0, INT 1)
• Serial I/O1 function pins
I/O port P5
• 8-bit CMOS I/O port with the same function as port P0
• Timer 2 output pin
• CMOS compatible input level
• CMOS 3-state output structure
• Interrupt input pin
• Serial I/O2 function pin
• Interrupt input pin
• Real time port function pin(INT4)
• Timer X, Timer Y function pins
• D-A conversion output
pins
3
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table. 2. Pin description (2)
Pin
P60/AN5–
P62/AN7
Name
I/O port P6
Function
• 3-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
Function except a port function
• A-D conversion output
pins
• CMOS 3-state output structure
P63/CMPIN/ Input port P6
AN8
P64/CMPREF/
AN9
• 2-bit CMOS input port
• CMOS compatible input level
P65/DAVREF/ I/O port P6
AN 10
• 1-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
• CMOS 3-state output structure
• 8-bit CMOS I/O port with the same function as port P0
P70/SIN2,
I/O port P7
P71/SOUT2,
• A-D conversion input pin
• D-A conversion power
source input pin
• A-D conversion input pin
• Serial I/O2 function pins
• CMOS compatible input level
• CMOS 3-state output structures
P72/SCLK2
P73/SRDY2/
ADT/AN0
P74/AN1–
P77/AN4
P80/DA3/
AN11,
P81/DA4/
• Analog comparator input pin
• A-D conversion input pin
• Reference voltage input pin
for analog comparator
• Serial I/O2 function pin
• A-D conversion input pin
• A-D trigger input pin
• A-D conversion input pin
I/O port P8
• 8-bit CMOS I/O port with the same function as port P0
• CMOS compatible input level
• CMOS 3-state output structures
• D-A conversion output
pin
• A-D conversion input pin
AN12,
P82/RTP0–
P87/RTP5
4
• Realtime port function
pins
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PART NUMBERING
Product M3807 3 M 4 - XXX FP
Package type
FP : 80P6N-A package
FS : 80D0 package
ROM number
Omitted in some types.
ROM/PROM size
1 : 4096 bytes
2 : 8192 bytes
3 : 12288 bytes
4 : 16384 bytes
5 : 20480 bytes
6 : 24576 bytes
7 : 28672 bytes
8 : 32768 bytes
9 : 36864 bytes
A : 40960 bytes
B : 45056 bytes
C : 49152 bytes
D : 53248 bytes
E : 57344 bytes
F : 61440 bytes
The first 128 bytes and the last 2 bytes of ROM
are reserved areas ; they cannot be used.
Memory type
M : Mask ROM version
E : EPROM or One Time PROM version
RAM size
0 : 192 bytes
1 : 256 bytes
2 : 384 bytes
3 : 512 bytes
4 : 640 bytes
5 : 768 bytes
6 : 896 bytes
7 : 1024 bytes
8 : 1536 bytes
9 : 2048 bytes
Fig. 3. Part numbering
5
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
GROUP EXPANSION
Mitsubishi plans to expand the 3807 group as follows:
Memory Type
Support for Mask ROM, One Time PROM and EPROM versions.
Memory Size
ROM/PROM size .................................................... 8K to 60K bytes
RAM size ............................................................. 384 to 2048 bytes
Package
80P6N-A ..................................... 0.8 mm-pitch plastic molded QFP
80D0 ........................ 0.8 mm-pitch ceramic LCC (EPROM version)
ROM size (byte)
Being planned
External
ROM
M38078S
Under development
M38079EF
60K
Being planned
M38078MC
48K
Being planned
32K
M38077M8
28K
24K
20K
16K
Mass product
Mass
product
M38073M4
M38073E4
12K
8K
384
512
640
768
896
1024
1152
1280
1408
1536
2048
3072
4032
RAM size (byte)
Note : Products under development or planning : the development schedule and specifications may be revised without notice.
Fig. 4. Memory expansion plan
Currently supported products are listed below.
Table 3. List of supported products
Product
(P) ROM size (bytes)
As of May 1996
RAM size (bytes)
Package
Remarks
ROM size for User ()
M38073M4-XXXFP
M38073E4-XXXFP
M38073E4FP
M38073E4FS
6
16384
(16254)
512
80P6N-A
Mask ROM version
One Time PROM version
One Time PROM version (blank)
80D0
EPROM version
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FUNCTIONAL DESCRIPTION
Central Processing Unit (CPU)
CPU Mode Register
The 3807 group uses the standard 740 family instruction set. Refer
to the table of 740 family addressing modes and machine instructions or the SERIES 740 <Software> User´s Manual for details on
the instruction set.
Machine-resident 740 family instructions are as follows:
The FST and SLW instructions cannot be used.
The MUL, DIV, WIT and STP instruction can be used.
The central processing unit (CPU) has the six registers.
b7
The CPU mode register contains the stack page selection bit and
processor mode bits. The CPU mode register is allocated at address
003B 16.
b0
CPU mode register
(CPUM : address 003B16)
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 : Memory expansion mode
1 0 : Microprocessor mode
1 1 : Not available
Stack page selection bit
0 : 0 page
1 : 1 page
XCOUT drivability selection bit
0 : Low drive
1 : High drive
Port XC switch bit
0 : I/O port function (stop oscillating)
1 : XCIN-XCOUT oscillating function
Main clock (XIN-XOUT) stop bit
0 : oscillating
1 : stopped
Main clock division ratio selection bits
b7 b6
0 0 : φ = f(XIN)/2 (high-speed mode)
0 1 : φ = f(XIN)/8 (middle-speed mode)
1 0 : φ = f(XCIN)/2 (low-speed mode)
1 1 : Not available
Fig. 5. Structure of CPU mode register
7
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Memory
Special function register (SFR) area
The special function register (SFR) area in the zero page contains
control registers such as I/O ports and timers.
RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
Zero page
The 256 bytes from addresses 000016 to 00FF16 are called the zero
page area. The internal RAM and the special function registers (SFR)
are allocated to this area.
The zero page addressing mode can be used to specify memory and
register addresses in the zero page area. Access to this area with
only 2 bytes is possible in the zero page addressing mode.
Special page
ROM
The first 128 bytes and the last 2 bytes of ROM are reserved for
device testing and the reset is user area for storing programs.
Interrupt vector area
The 256 bytes from addresses FF0016 to FFFF16 are called the special page area. The special page addressing mode can be used to
specify memory addresses in the special page area. Access to this
area with only 2 bytes is possible in the special page addressing
mode.
The interrupt vector area contains reset and interrupt vectors.
RAM area
RAM capacity
(byte)
192
256
384
512
640
768
896
1024
1536
2048
Address
XXXX16
000016
SFR area
00FF16
013F16
01BF16
023F16
02BF16
033F16
03BF16
043F16
063F16
083F16
Zero page
004016
RAM
010016
XXXX16
Reserved area
084016
ROM area
ROM capacity
(byte)
4096
8192
12288
16384
20480
24576
28672
32768
36864
40960
45056
49152
53248
57344
61440
Not used
Address
YYYY16
Address
ZZZZ16
F00016
E00016
D00016
C00016
B00016
A00016
900016
800016
700016
600016
500016
400016
300016
200016
100016
F08016
E08016
D08016
C08016
B08016
A08016
908016
808016
708016
608016
508016
408016
308016
208016
108016
Fig. 6. Memory map diagram
8
ROM
YYYY16
Reserved ROM area
(128 byte)
ZZZZ16
FF0016
Special page
FFDC16
Interrupt vector area
FFFE16
FFFF16
Reserved ROM area
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
000016
Port P0 (P0)
002016
Timer X (low-order) (TXL)
000116
Port P0 direction register (P0D)
002116
Timer X (high-order) (TXH)
000216
Port P1 (P1)
002216
Timer Y (low-order) (TYL)
000316
Port P1 direction register (P1D)
002316
Timer Y (high-order) (TYH)
000416
Port P2 (P2)
002416
Timer 1 (T1)
000516
Port P2 direction register (P2D)
002516
Timer 2 (T2)
000616
Port P3 (P3)
002616
Timer 3 (T3)
000716
Port P3 direction register (P3D)
002716
Timer X mode register (TXM)
000816
Port P4 (P4)
002816
Timer Y mode register (TYM)
000916
Port P4 direction register (P4D)
002916
Timer 123 mode register (T123M)
000A16
Port P5 (P5)
002A16
Real time port register (RTP)
000B16
Port P5 direction register (P5D)
002B16
Real time port control register 0 (RTPCON0)
000C16
Port P6 (P6)
002C16
Real time port control register 1 (RTPCON1)
000D16
Port P6 direction register (P6D)
002D16
Real time port control register 2 (RTPCON2)
Real time port control register 3 (RTPCON3)
000E16
Port P7 (P7)
002E16
000F16
Port P7 direction register (P7D)
002F16
Timer A (low-order) (TAL)
001016
Port P8 (P8)
003016
Timer A (high-order) (TAH)
001116
Port P8 direction register (P8D)
003116
Timer B (low-order) (TBL)
001216
003216
Timer B (high-order) (TBH)
001316
003316
D-A control register (DACON)
001416
Timer XY control register (TXYCON)
003416
A-D control register (ADCON)
001516
Port P2P3 control register (P2P3C)
003516
A-D conversion register (AD)
001616
Pull-up control register (PULL)
003616
D-A1 conversion register (DA1)
001716
Watchdog timer control register (WDTCON)
003716
D-A2 conversion register (DA2)
001816
Transmit/Receive buffer register (TB/RB)
003816
D-A3 conversion register (DA3)
001916
Serial I/O1 status register (SIO1STS)
003916
D-A4 conversion register (DA4)
001A16
Serial I/O1 control register (SIO1CON)
003A16
Interrupt edge selection register (INTEDGE)
001B16
UART control register (UARTCON)
003B16
CPU mode register (CPUM)
001C16
Baud rate generator (BRG)
003C16
Interrupt request register 1(IREQ1)
001D16
Serial I/O2 control register 1 (SIO2CON1)
003D16
Interrupt request register 2(IREQ2)
001E16
Serial I/O2 control register 2 (SIO2CON2)
003E16
Interrupt control register 1(ICON1)
001F16
Serial I/O2 register (SIO2)
003F16
Interrupt control register 2(ICON2)
Fig. 7. Memory map of special function register (SFR)
9
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
I/O Ports
[Direction Registers] PiD
The 3807 group has 68 programmable I/O pins arranged in nine individual I/O ports (P0—P5, P60—P62, P65 and P7—P8). The I/O ports
have direction registers which determine the input/output direction of
each individual pin. Each bit in a direction register corresponds to
one pin, each pin can be set to be input port or output port. When "0"
is written to the bit corresponding to a pin, that pin becomes an input
pin. When "1" is written to that pin, that pin becomes an output pin. If
data is read from a pin set to output, the value of the port output latch
is read, not the value of the pin itself. Pins set to input (the bit corresponding to that pin must be set to "0") are floating and the value of
that pin can be written to. If a pin set to input is written to, only the
port output latch is written to and the pin remains floating.
b7
b0
Port P2P3 control register
(P2P3C : address 001516)
P34 Clock output control bit
0: I/O port
1: Clock output
Output clock frequency selection bit
000: φ
001: f(XCIN)
010: “L” fixed output
011: “L” fixed output
(f(XCIN) in low-speed mode)
100: f(XIN)
101: f(XIN)/2 (f(XCIN)/2 in low-speed mode)
110: f(XIN)/4 (f(XCIN)/4 in low-speed mode)
111: f(XIN)/16 (f(XCIN)/16 in low-speed mode)
[Pull-up Control Register] PULL
Ports P0, P1 and P2 have built-in programmable pull-up resistors.
The pull-up resistors are valid only in the case that the each control
bit is set to "1" and the corresponding port direction registers are set
to input mode.
(1) CMOS/TTL input level selection
Either CMOS input level or TTL input level can be selected as an
input level for ports P20 to P27 and P32. The input level is selected by
P2·P3 2 input level selection bit (b7) of the port P2P3 control register
(address 0015 16). When the bit is set to "0", CMOS input level is
selected. When the bit is set to "1", the TTL input level is selected.
After this bit is re-set, its initial value depends on the state of the
CNVss pin. When the CNVss pin is connected to Vss, the initial value
becomes "0". When the CNVss pin is connected to Vcc, the initial
value becomes "1".
Not used (return "0" when read)
P2 • P32 input level selection bit
0: CMOS level input
1: TTL level input
Fig. 8. Structure of Port P2P3 control register
b7
b0
Pull-up control register
(PULL : address 001616)
P00—P03 pull-up control bit
P04,P05 pull-up control bit
(2) Notes on STP instruction execution
Make sure that the input level at each pin is either 0V or to Vcc during
execution of the STP instruction. When an input level is at an intermediate potential, a current will flow from Vcc to Vss through the
input-stage gate.
P06 pull-up control bit
P07 pull-up control bit
P10—P13 pull-up control bit
P14—P17 pull-up control bit
P20—P23 pull-up control bit
P24—P27 pull-up control bit
Fig. 9. Structure of Pull-up control register
10
0: No pull-up
1: Pull-up
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table. 4. List of I/O port functions (1)
Name
Input/Output
P00–P07
P10–P17
Pin
Port P0
Port P1
Input/output,
individual bits
P20–P27
Port P2
CMOS/TTL input level
CMOS 3-state output
P30/RTP 6,
P31/RTP 7
P32
Port P3
CMOS compatible input level Real time port output
CMOS 3-state output
CMOS/TTL input level
Control signal input
CPU mode register
Pull-up control register
Port P2P3 control register
CPU mode register
Real time port control register
CPU mode register
CMOS 3-state output
Port P2P3 control register
CMOS compatible input level Control signal output
CMOS 3-state output
Clock output, φ output
CPU mode register
P33
P34/CKOUT
I/O Format
Non-Port Function
Related SFRs
CMOS compatible input level Address low-order byte output CPU mode register
CMOS 3-state output
Address high-order byte output Pull-up control register
Data bus I/O
CPU mode register
Port P2P3 control register
Ref.No.
(1)
(2)
(3)
(4)
P35–P37
Control signal I/O
CPU mode register
(3)
P40/X COUT, Port P4
P41/X CIN
P42/INT0,
P43/INT 1
P44/RXD,
P45/T XD,
Sub-clock generating circuit
CPU mode register
(5)
(6)
(7)
P46/S CLK1,
P47/SRDY1
P50/T OUT
P51/S CMP2/
INT2
P52/INT3,
P53/INT 4
External interrupt input
Interrupt edge selection register
Timer X, Timer Y function input
Serial I/O1 function I/O
Serial I/O1 control register
UART control register
Port P5
P54/CNTR0
P55/CNTR1
P56/DA1,
P57/DA2
P60/AN5— Port P6
P62/AN7
P63/CMP IN/
AN8
P64 /CMPREF/
Input
AN9
P65 /DAVREF/
AN10
P70/SIN2,
P71/S OUT2,
P72/SCLK2
P73/S RDY2/
ADT/AN0
P74/AN1—
P77/AN4
Input/output,
individual bits
Port P7
(8)
(9)
(10)
(11)
(12)
(22)
Timer 2 output
External interrupt input
Serial I/O2 function I/O
External interrupt input
Real time port trigger input (INT4)
Timer 123 mode register
Interrupt edge selection register
Serial I/O2 control register
Interrupt edge selection register
Timer X, Timer Y function I/O
(13)
D-A conversion output
Timer X mode register
Timer Y mode register
D-A control register
A-D conversion input
A-D control register
(15)
A-D control register
(16)
A-D control register
(17)
Serial I/O2 control register
(18)
(19)
CMOS compatible input level Analog comparator input pin
A-D conversion input
Analog comparator reference
voltage input pin
A-D conversion input
CMOS compatible input level D-A converter power source
CMOS 3-state output
input
A-D conversion input
Serial I/O2 function I/O
Serial I/O2 function I/O
A-D trigger input
A-D conversion input
A-D conversion input
Serial I/O2 control register
A-D control register
A-D control register
(7)
(14)
(20)
(21)
(15)
11
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table. 5. List of I/O port functions (2)
Pin
P80/DA3/
AN11
P81/DA4/
AN12
P82/RTP 0—
P87/RTP 5
Name
Input/Output
Port P8
Input/output,
individual bits
I/O Format
Non-Port Function
CMOS compatible input level D-A conversion output
CMOS 3-state output
A-D conversion input
Real time port output
Related SFRs
Ref.No.
D-A control register
A-D control register
(14)
Real time port control
register
(23)
Note1 : For details of the functions of ports P0 to P3 in modes other than single-chip mode, and how to use double-function ports as function
I/O ports, refer to the applicable sections.
2 : Make sure that the input level at each pin is either 0 V or Vcc during execution of the STP instruction.
When an input level is at an intermediate potential, a current will flow from Vcc to Vss through the input-stage gate.
12
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(1) Ports P0—P2
(2) Ports P30,P31
Real time port output selection bit
Pull-up control
Direction register
Data bus
Direction register
Data bus
Port latch
Port latch
Data for real time port
*1
(3) Ports P32,P33,P35—P37
(4) Port P34
Clock output control
Direction register
Direction register
Data bus
Port latch
Data bus
Port latch
*1
Clock output
(6) Port P41
(5) Port P40
Port XC switch bit
Port XC switch bit
Direction register
Data bus
Direction register
Port latch
Data bus
Port latch
Oscillator
Sub-clock oscillating circuit input
Port P41
Port XC switch bit
(7) Ports P42,P43,P52,P53
Direction register
Data bus
(8) Port P44
Serial I/O1 enable bit
Receive enable bit
Direction register
Port latch
Data bus
Port latch
Interrupt input
Timer X input (P42)
Timer Y input (P43)
RTP trigger input (P53)
serial I/O1 input
except P52
*1 Either CMOS input level or TTL input level can be selected as an input level for ports P20 to P27 and P32 by P2•P32 input level selection bit.
Fig. 10. Port block diagram (1)
13
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(9) Port P45
(10) Port P46
P45/TXD P-channel output disable bit
Serial I/O1 enable bit
Transmit enable bit
Direction register
Serial I/O1 synchronous
clock selection bit
Serial I/O1 enable bit
Serial I/O1mode selection bit
Serial I/O1enable bit
Direction register
Data bus
Port latch
Data bus
Port latch
Serial I/O1 output
Serial I/O1 clock output
Serial I/O1 external clock input
(11) Port P47
(12) Port P50
Serial I/O1 mode selection bit
Serial I/O1 enable bit
SRDY1 output enable bit
Direction register
Data bus
Direction register
Data bus
Port latch
Port latch
TOUT output control bit
Timer 2 output
Serial I/O1 ready output
(13) Ports P54,P55
(14) Ports P56,P57,P80,P81
Direction register
Data bus
Direction register
Port latch
Data bus
Timer X, Timer Y
operating mode bits
"001"
"100"
"101"
"110"
Timer output
Port latch
D-A conversion output
DA1 output enable bit (P56)
DA2 output enable bit (P57)
DA3 output enable bit (P80)
DA4 output enable bit (P81)
CNTR0, CNTR1 interrupt input
A-D conversion input
Analog input pin selection bit
except P56,P57
(15) Ports P60—P62,P74—P77
(16) Ports P63,P64
Direction register
Data bus
Port latch
Data bus
A-D conversion input
Analog input pin selection bit
A-D conversion input
Analog input pin selection bit
Fig. 11. Port block diagram (2)
14
Analog comparator input
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(18) Port P70
(17) Port P65
Direction register
Data bus
Port latch
Direction register
Data bus
Port latch
D-A conversion power source input
Serial I/O2 input
A-D conversion input
Analog input pin selection bit
(20) Port P72
(19) Port P71
P71/SOUT2 P-channel output disable bit
Serial I/O2 transmit completion signal
Serial I/O2 port selection bit
Direction register
Direction register
Data bus
Port latch
P72/SCLK2 P-channel output
disable bit
Serial I/O2 synchronous
clock selection bit
Serial I/O2 port selection bit
Port latch
Data bus
Serial I/O2 clock output
Serial I/O2 clock output
Serial I/O2 external clock input
(22) Port P51
(21) Port P73
SRDY2 output enable bit
Direction register
Serial I/O2 I/O comparison
signal control bit
Direction register
Data bus
Port latch
Serial I/O2 ready output
AD external trigger valid bit
Data bus
Port latch
Serial I/O2 I/O comparison
signal output
Interrrupt input
A-D trigger interrupt input
A-D conversion input
Analog input pin selection bit
(23) Ports P82—P87
Real time port output selection bit
Direction register
Data bus
Port latch
Data for real time port
Fig. 12. Port block diagram (3)
15
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Interrupts
Interrupts occur by twenty sources: eight external, eleven internal,
and one software.
(1) Interrupt Control
Each interrupt except the BRK instruction interrupt have both an
interrupt request bit and an interrupt enable bit, and is controlled by
the interrupt disable flag. An interrupt occurs if the corresponding
interrupt request and enable bits are "1" and the interrupt disable flag
is "0". Interrupt enable bits can be set or cleared by software. Interrupt request bits can be cleared by software, but cannot be set by
software. The BRK instruction interrupt and reset cannot be disabled
with any flag or bit. The I flag disables all interrupts except the BRK
instruction interrupt and reset. If several interrupts requests occurs
at the same time the interrupt with highest priority is accepted first.
(2) Interrupt Operation
Upon acceptance of an interrupt the following operations are automatically performed:
1. The processing being executed is stopped.
2. The contents of the program counter and processor status register are automatically pushed onto the stack
3. Concurrently with the push operation, the interrupt jump destination address is read from the vector table into the program
counter.
4. The interrupt disable flag is set and the corresponding interrupt request bit is cleared.
■Notes on Use
When the active edge of an external interrupt (INT0—INT4, CNTR0
or CNTR1) is set or the timer /INT interrupt source and the ADT/ A-D
conversion interrupt source are changed, the corresponding
interrupt request bit may also be set. Therefore, please take following sequence:
(1) Disable the external interrupt which is selected.
(2) Change the active edge in interrupt edge selection register
(in case of CNTR0: Timer X mode register ; in case of CNTR1:
Timer Y mode register).
(3) Clear the set interrupt request bit to "0."
(4) Enable the external interrupt which is selected.
16
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table. 6. Interrupt vector addresses and priority
Interrupt Source Priority
Vector Addresses (Note 1)
High
Low
Reset (Note 2)
INT0
1
2
FFFD16
FFFB16
FFFC16
FFFA16
INT1
3
FFF916
FFF816
Serial I/O1
receive
4
FFF716
FFF616
Serial I/O1
transmit
Timer X
Timer Y
INT3
5
FFF516
FFF416
6
7
8
FFF316
FFF116
FFEF16
FFF216
FFF016
FFEE16
Interrupt Request
At reset
At detection of either rising or falling edge of
Non-maskable
External interrupt
INT0 input
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O1 is selected
At detection of either rising or falling edge of
INT1 input
At completion of serial I/O1 data receive
At completion of serial I/O1 data transmit
shift or when transmit buffer is empty
At timer X underflow
At timer Y underflow
At detection of either rising or falling edge of
INT3 input
Timer 2
INT4
9
FFED16
Valid when serial I/O1 is selected
External interrupt
FFEC16
At timer 2 underflow
At detection of either rising or falling edge of
INT4 input
(active edge selectable)
Valid when INT3 interrupt is selected
Valid when timer 2 interrupt is selected
External interrupt
(active edge selectable)
At timer 3 underflow
At detection of either rising or falling edge of
CNTR0 input
Valid when INT4 interrupt is selected
Valid when timer 3 interrupt is selected
External interrupt
(active edge selectable)
Timer 3
CNTR 0
10
FFEB16
FFEA16
CNTR 1
11
FFE916
FFE816
Serial I/O2
12
FFE716
FFE616
INT2
13
FFE516
FFE416
Timer 1
Timer A
Timer B
Remarks
Generating Conditions
At detection of either rising or falling edge of
CNTR1 input
At completion of serial I/O2 data transmit
and receive
At detection of either rising or falling edge of
External interrupt
(active edge selectable)
Valid when serial I/O2 is selected
INT2 input
(active edge selectable)
Valid when INT2 interrupt is selected
Valid when timer 1 interrupt is selected
At timer 1 underflow
At timer A underflow
At timer B underflow
14
15
FFE316
FFE116
FFE216
FFE016
A-D conversion
ADT
16
FFDF16
FFDE16
At completion of A-D conversion
At falling edge of ADT input
BRK instruction
17
FFDD16
FFDC16
At BRK instruction execution
External interrupt
Valid when A-D interrupt is selected
External interrupt(valid at falling)
Valid when ADT interrupt is selected and
when A-D external trigger is selected.
Non-maskable software interrupt
Note1 : Vector addresses contain interrupt jump destination addresses.
2 : Reset function in the same way as an interrupt with the highest priority.
17
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Interrupt request bit
Interrupt enable bit
Interrupt disable flag I
BRK instruction
Reset
Interrupt request
Fig. 13. Interrupt control
b7
b0 Interrupt edge selection register
(INTEDGE : address 003A16)
INT0 interrupt edge selection bit
INT1 interrupt edge selection bit
INT2 interrupt edge selection bit
INT3 interrupt edge selection bit
INT4 interrupt edge selection bit
Timer 1/INT2 interrupt source bit
Timer 2/INT3 interrupt source bit
Timer 3/INT4 interrupt source bit
b7
0 : Falling edge active
1 : Rising edge active
0 : INT interrupt selected
1 : Timer interrupt selected
b0 Interrupt request register 1
(IREQ1 : address 003C16)
b7
b0 Interrupt request register 2
(IREQ2 : address 003D16)
CNTR0 interrupt request bit
CNTR1 interrupt request bit
Serial I/O2 interrupt request bit
Timer 1/INT2 interrupt request bit
Timer A interrupt request bit
Timer B interrupt request bit
ADT/AD conversion interrupt request bit
Not used (returns "0" when read)
INT0 interrupt request bit
INT1 interrupt request bit
Serial I/O1 receive interrupt request bit
Serial I/O1 transmit interrupt request bit
Timer X interrupt request bit
Timer Y interrupt request bit
Timer 2/INT3 interrupt request bit
Timer 3/INT4 interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
b7
b0 Interrupt control register 1
(ICON1 : address 003E16)
INT0 interrupt enable bit
INT1 interrupt enable bit
Serial I/O1 receive interrupt enable bit
Serial I/O1 transmit interrupt enable bit
Timer X interrupt enable bit
Timer Y interrupt enable bit
Timer 2/INT3 interrupt enable bit
Timer 3/INT4 interrupt enable bit
b7
b0 Interrupt control register 2
(ICON2 : address 003F16)
CNTR0 interrupt enable bit
CNTR1 interrupt enable bit
Serial I/O2 interrupt enable bit
Timer 1/INT2 interrupt enable bit
Timer A interrupt enable bit
Timer B interrupt enable bit
ADT/AD conversion interrupt enable bit
Not used (returns "0" when read)
(Do not write "1" to this bit)
0 : Interrupt disabled
1 : Interrupt enabled
Fig. 14. Structure of Interrupt-related registers
18
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timers
The 3807 group has seven timers : four 16-bit timers (Timer X, Timer
Y, Timer A, and Timer B) and three 8-bit timers (Timer 1, Timer 2,
and Timer 3).
All timers are down-counters. When the timer reaches either "00 16"
or "0000 16", an underflow occurs with the next count pulse. Then the
contents of the timer latch is reloaded into the timer and the timer
continues down-counting. When a timer underflows, the interrupt
request bit corresponding to that timer is set to "1."
Read and write operation on 16-bit timer must be performed for both
high- and low-order bytes. When reading a 16-bit timer, read from
the high-order byte first. When writing to 16-bit timer, write to the loworder byte first. The 16-bit timer cannot perform the correct operation
when reading during write operation, or when writing during read
operation.
Timers A and B are real time output port timers. For details, refer to
the section "Real time output port".
●Timer X, Timer Y
Timer X and Y are independent 16-bit timers which can select
enable seven different operation modes each by the setting of their
mode registers. The related registers of timer X and Y are listed
below. The following register abbreviations are used:
• Timer XY control register (TXYCON: address 0014 16)
• Port P4 direction register (P4D: address 000916 )
• Port P5 direction register (P5D: address 000B16)
• Timer X (low-order) (TXL: address 002016 )
• Timer X (high-order) (TXH: address 002116)
• Timer Y (low-order) (TYL: address 002216 )
• Timer Y (high-order) (TYH: address 002316)
• Timer X mode register (TXM: address 002716)
• Timer Y mode register (TYM: address 002816)
• Interrupt edge selection register (INTEDGE: address 003A16)
• Interrupt request register 1 (IREQ1: address 003C16 )
• Interrupt request register 2 (IREQ2: address 003D16 )
• Interrupt control register 1 (ICON1: address 003E16)
• Interrupt control register 2 (ICON2: address 003F16)
For details, refer to the structures of each register.
• Interrupt
When an underflow is generated, the corresponding timer X
interrupt request bit (b4) or timer Y interrupt request bit (b5) of IREQ1
is set to "1".
• Explanation of operation
After reset release, timer X stop control bit (b0) and timer Y stop
control bit (b1) of TXYCON are set to "1"and the timer stops.
During timer stop, a timer value written to the timer X or timer Y
is set by writing data to the corresponding timer latch and
timer at the same time. The timer operation is started by setting the
bits 0 or 1 of TXYCON to "0". When the timer reaches "000016", an
underflow occurs with the next count pulse. Then the contents of
the timer latch is reloaded into the timer and the timer continues
down-counting. For changing a timer value during count operation,
a latch value must be changed by writing data only to the
corresponding latch first. Then the timer is reloaded with the new
latch value at the next underflow.
➁Event counter mode
• Mode selection
This mode can be selected by the following sequence.
1. Set "000" to the timer X operating mode bit (bits 2 to 0) of TXM,
or to the timer Y operating mode bit (bits 2 to 0) of TYM.
2. Select an input signal from the CNTR0 pin (in case of timer X ;
set "11" to bits 7 and 6 of TXM), or from the CNTR1 pin (in case
of timer Y ; set "11" to bits 7 and 6 of TYM) as a count source.
The valid edge for the count operation is selected by the CNTR0/
CNTR1 active edge switch bit (b5) of TXM or TYM: if set to "0",
counting starts with the rising edge or if set to "1", counting starts
with the falling edge.
• Interrupt
The interrupt generation at underflow is the same as already
explained for the timer mode.
• Explanation of operation
The operation is the same as already explained for the timer mode.
In this mode, the double-function port of CNTR 0/CNTR 1 pin must
be set to input.
Figure 19 shows the timing chart for the timer • event counter mode.
The following is an explanation of the seven modes:
(1) Timer • event counter mode
➀Timer mode
• Mode selection
This mode can be selected by setting "000" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(XIN)/2, f(XIN)/16, or f(XCIN) can be
selected as the count source.
In low-speed mode the count source is f(XCIN).
A count source is selected by the following bit.
Timer X count source selection bit (bits 7 and 6) of TXM
Timer Y count source selection bit (bits 7 and 6) of TYM
(2) Pulse output mode
• Mode selection
This mode can be selected by setting "001" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(XIN)/2, f(XIN)/16, or f(XCIN) can be
selected as the count source.
In low-speed mode the count source is f(XCIN).
• Interrupt
The interrupt generation at underflow is the same as already
explained for the timer mode.
• Explanation of operation
Counting operation is the same as in timer mode. Moreover the
pulse which is inverted each time the timer underflows is output
from CNTR 0/CNTR 1 pin. When the CNTR0/CNTR1 active edge
switch bit (b5) of TXM or TYM is "0", output starts with "H" level.
When set to "1", output starts with "L" level.
19
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
■Precautions
Set the double-function port of CNTR0/CNTR 1 pin to output in this
mode.
[During timer operation stop]
The output from CNTR0/CNTR1 pin is initialized to the level set
through CNTR0/CNTR1 active edge switch bit.
[During timer operation enabled]
When the value of the CNTR0/CNTR1 active edge switch bit is written over, the output level of CNTR0/CNTR1 pin is inverted.
Figure 20 shows the timing chart of the pulse output mode.
(3) Pulse period measurement mode
• Mode selection
This mode can be selected by setting "010" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(XIN)/2 or f(XIN)/16 can be selected
as the count source.
In low-speed mode the count source is f(XCIN).
• Interrupt
The interrupt generation at underflow is the same as already
explained for the timer mode. Bits 0 or 1 of IREQ2 is set to "1"
synchronously to pulse period measurement completion.
• Explanation of operation
[During timer operation stop]
Select the count source. Next, select the interval of the pulse
periods to be measured. When bit 5 of the TXM or TYM is set to
"0", the timer counts during the interval of one falling edge of CNTR0/
CNTR1 pin input until the next falling edge of input. If bits 5 are set
to "1", the timer counts during the interval of one rising edge until
the next rising edge.
[During timer operation enabled]
The pulse period measurement starts by setting bit 0 or 1 of
TXYCON to "0" and the timer counts down from the value that was
set to the timer before the start of measurement. When a valid edge
of measurement start/stop is detected, the 1's complement of the
timer value is written to the timer latch and "FFFF16" is set to the
timer. Furthermore when the timer underflows, a timer X/Y interrupt
request occurs and "FFFF16" is set to the timer. The measured
value is held until the next measurement completion.
■Precautions
Set the double-function port of CNTR 0/CNTR1 pin to input in this
mode.
A read-out of timer value is impossible in this mode. The timer is
written to only during timer stop (no measurement of pulse periods).
Since the timer latch in this mode is specialized for the read-out of
measured values, do not perform any write operations during
measurement.
The timer is set to "FFFF 16" when the timer either underflows or a
valid edge of pulse period measurement is detected. Due to that, the
timer value at the start of measurement depends on the timer value
before the start of measurement.
Figure 19 shows the timing chart of the pulse period measurement
mode.
20
(4) Pulse width measurement mode
• Mode selection
This mode can be selected by setting "011" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(X IN)/2 or f(X IN)/16 can be selected
as the count source.
In low-speed mode the count source is f(XCIN).
• Interrupt
The interrupt generation at underflow is the same as already
explained for the timer mode. Bit 0 or 1 of IREQ2 is set to "1" synchronously to pulse width measurement completion.
• Explanation of operation
[During timer operation stop]
Select the count source. Next, select the interval of the pulse widths
to be measured. When bit 5 of TXM or TYM is set to "1", the timer
counts during the interval of one falling edge of CNTR 0/CNTR1 pin
input until the next rising edge of input ("L" interval). If bit 5 is set to
"0", the timer counts during the interval of one rising edge until the
next falling edge ("H" interval).
[During timer operation enabled]
The pulse width measurement starts by setting bit 0 or 1 of TXYCON
to "0" and the timer counts down from the value that was set to the
timer before the start of measurement. When a valid edge of
measurement completion is detected, the 1's complement of the
timer value is written to the timer latch and "FFFF16 " is set to the
timer. Furthermore when the timer underflows, a timer X/Y interrupt
request occurs and "FFFF 16" is set to the timer. The measured
value is held until the next measurement completion.
■Precautions
Set the double-function port of CNTR0/CNTR1 pin to input in this
mode.
A read-out of timer value is impossible in this mode. The timer is
written to only during timer stop (no measurement of pulse widths).
Since the timer latch in this mode is specialized for the read-out of
measured values, do not perform any write operations during measurement.
The timer value is set to "FFFF16 " when the timer either underflows
or a valid edge of pulse widths measurement is detected. Due to
that, the timer value at the start of measurement depends on the
timer value before the start of measurement.
Figure 20 shows the timing chart of the pulse width measurement
mode.
(5) Programmable waveform generation mode
• Mode selection
This mode can be selected by setting "100" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(X IN)/2, f(XIN)/16, or f(XCIN) can be
selected as the count source.
In low-speed mode the count source is f(XCIN).
• Interrupt
The interrupt generation at underflow is the same as already
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
explained for the timer mode.
• Explanation of operation
Counting operation is the same as in timer mode. Moreover the
timer outputs the data set in the corresponding output level latch
(bit 4 of TXM or TYM) to CNTR0/CNTR1 pin each time the timer
underflows. After the timer underflows, the generation of optional
waveform from CNTR0/CNTR1 pin is possible through a change of
values in the output level latch and timer latch.
■Precautions
Set the double-function port of CNTR0/CNTR 1 pin to output in this
mode.
Figure 23 shows the timing chart of the programmable waveform
generation mode.
(6) Programmable one-shot generating mode
• Mode selection
This mode can be selected by setting "101" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(XIN)/2 or f(XIN)/16 can be selected
as the count source.
• Interrupt
The interrupt generation at underflow is the same as already
explained for the timer mode. The one-shot generating trigger
condition must be set to the INT0 interrupt edge selection bit (b0)
and INT1 interrupt edge selection bit (b1) of INTEDGE. Setting these
bits to "0" causes the interrupt request being
triggered by a falling edge, setting them to "1" causes the interrupt
request being triggered by a rising edge. The INT0 interrupt request
bit (b0) and INT1 interrupt request bit (b1) of IREQ1 are set to "1" by
detecting the active edge of the INT pin.
• Explanation of operation
For a "H" one-shot pulse, set bit 5 of TXM, TYM to "0".
[During timer operation stop]
The output level of CNTR0/CNTR1 pin is initialized to "L" at mode
selection. Set the one-shot pulse width to TXH, TXL, TYH, TYL. A
trigger generation during timer stop (input signal to INT0/INT 1 pin)
is invalid.
[During timer operation enabled]
When a trigger generation is detected, "H" is output, and at underflow
"L" is output from CNTR0/CNTR1 pin.
For a "L" one-shot pulse set bit 5 of TXM, TYM to "1".
[During timer operation stop]
The output level of CNTR0/CNTR1 pin is initialized to "H" at mode
selection. Set the one-shot pulse width to TXH, TXL, TYH, TYL. A
trigger generation during timer stop (input signal to INT0/INT1 pin)
is invalid.
[During timer operation enabled]
When a trigger generation is detected, "L" is output, and at underflow
"H" is output from CNTR0/CNTR1 pin.
■Precautions
• Set the double-function port of CNTR0/CNTR1 pin to output and the
double-function port of INT0/INT1 pin to input in this mode.
• This mode is unused in low-speed mode.
• During one-shot generation permission or one-shot generation the
output level from CNTR 0/CNTR1 pin changes if the value of the
CNTR 0/CNTR1 active edge switch bit is inverted.
Figure 24 shows the timing chart of the programmable one-shot
generating mode.
(7) PWM mode
• Mode selection
This mode can be selected by setting "110" to the following bits.
Timer X operating mode bit (bits 2 to 0) of TXM
Timer Y operating mode bit (bits 2 to 0) of TYM
• Count source selection
In high- or middle-speed mode, f(XIN)/2 or f(X IN)/16 can be selected
as the count source.
• Interrupt
With a rising edge of CNTR0/CNTR1 output, the timer X interrupt
request bit (b4) and timer Y interrupt request bit (b5) of IREQ1 are
set to "1".
• Explanation of operation
PWM waveform is output from CNTR0 pin (in case of timer X) or
from CNTR1 pin (in case of timer Y).
The "H" interval of PWM waveform is determined by the setting
value m (m=0 to 255) of TXH and TYH and the "L" interval of PWM
waveform is determined by the setting value n (n=0 to 255) of TXL
and TYL.
The PWM cycles are:
PWM cycle time = (m+n)·ts
PWM duty = m/(m+n)
where: ts: period of timer X/timer Y count source
[During count operation stop]
When a timer value is set to TXL, TXH, TYL, TYH by writing data to
timer and timer latch at the same time. When setting this value, the
output of CNTR0/CNTR1 pin is initialized to the "H" level.
[During count operation enabled]
By setting the bit 0 or 1 of TXYCON to "0", an "H" interval of TXH or
TYH is output first, and after that a "L" level interval of TXL or TYL
are output next. These operations are repeated continuously. The
PWM output is changed after the underflow by setting a timer value,
which is set by writing data to the timer latch only, to TXL, TXH,
TYL, TYH.
■Precautions
• Set the double-function port of CNTR0/CNTR1 pin to output in this
mode.
• This mode is unused in low-speed mode.
• When the PWM "H" interval is set to "0016", PWM output is "L".
• When the PWM "L" interval is set to "0016", PWM output is "H".
• When the PWM "H" interval and "L" interval are set to "0016", PWM
output is "L".
• When a PWM "H" interval or "L" interval is set to "0016" at least for
a short time, timer X/timer Y interrupt request does not occur.
• When the value set to the timer latch is "0016 ", the value is undefined since the timer counts down by dummy count operation.
Figure 23 shows the timing chart of the PWM mode.
21
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
■Precautions regarding all modes
• Timer X, timer Y writing control
One of the following operation is selected by bit 3 of TXM or TYM
for timer X or timer Y.
Writing data to the corresponding latch and timer at the same
time
Writing data to only corresponding latch
When the operation "writing data to only corresponding latch" is
selected, the value is set to the timer latch by writing a value to
timer X/Y address and a timer is renewed at the next underflow.
After releasing a reset, "writing the corresponding latch and timer
at the same time" is selected. When a value is written to timer X/Y
address, a value is set to a timer and a timer latch at the same time.
When "writing data to only corresponding latch" is selected, if writing to a reload latch and an underflow are performed at the same
timing, the timer value is undefined.
• Timer X, timer Y read control
In pulse period measurement mode and pulse width measurement
mode the timer value cannot be read-out. In all other modes readout operations without effect to count operations/stops are possible.
However, the timer latch value cannot be read-out.
• Precautions regarding the CNTR 0/CNTR1 active edge switch bit
and the INT0/INT1 interrupt edge selection bit:
The CNTR 0/CNTR1 active edge switch bit and the INT 0/INT 1
interrupt edge selection bit settings have an effect also on each
interrupt active edge.
22
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
CNTR0 active edge
switch bit
Programmable one-shot
"1"
P42/INT0
Data bus
generating mode
Programmable one-shot
generating circuit
"0"
Programmable one-shot generating mode
PWM mode
PWM mode
PWM generating circuit
INT0 interrupt request
Programmable waveform
generating mode
D
Output level latch
Q
T
pulse output mode
S
Q
T
CNTR0 active edge
switch bit
"0"
Q
"1" Pulse output mode
"001"
"100"
"101"
"110"
Timer X operating
mode bits
Timer X latch (low-order)
P54 latch
Timer X latch (high-order)
Timer X (high-order)
Timer X (low-order)
Timer X interrupt request
P54 direction register
Pulse period measurement mode
Pulse width measurement mode
Edge detection circuit
CNTR0 interrupt request
"1"
P54/CNTR0
"0"
CNTR0 active
edge switch bit
f(XIN)/2
f(XIN)/16
f(XCIN)
Timer X stop control bit
Timer X count source
selection bits
CNTR1 active edge
switch bit
Programmable one-shot
"1"
generating mode
P43/INT1
Programmable one-shot
generating circuit
"0"
Programmable one-shot generating mode
PWM mode
PWM mode
PWM generating circuit
INT1 interrupt request
Programmable waveform
generating mode
Output level latch
D
T
Q
Pulse output mode
S
Q
T
CNTR1 active edge
switch bit
"0"
Q
"1"
"001"
"100"
"101"
"110"
Timer Y operating
mode bits
Timer Y latch (low-order)
Timer Y (low-order)
P55 latch
Pulse output mode
Timer Y latch (high-order)
Timer Y (high-order)
Timer Y interrupt request
P55 direction register
Pulse period measurement mode
Pulse width measurement mode
Edge detection circuit
CNTR1 interrupt request
"1"
P55/CNTR1
"0"
CNTR1 active
edge switch bit
f(XIN)/2
f(XIN)/16
f(XCIN)
Timer Y stop control bit
Timer Y count source
selection bits
Fig. 15. Block diagram of Timer X and Timer Y
23
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b7
b7
b0
b0
Timer X mode register
(TXM : address 002716)
Timer Y mode register
(TYM : address 002816)
Timer X operating mode bits
b2 b1 b0
0 0 0 : Timer • event counter mode
0 0 1 : Pulse output mode
0 1 0 : Pulse period measurement mode
0 1 1 : Pulse width measurement mode
1 0 0 : Programmable waveform generating mode
1 0 1 : Programmable one-shot generating mode
1 1 0 : PWM mode
1 1 1 : Not used
Timer Y operating mode bits
b2 b1 b0
0 0 0 : Timer•event counter mode
0 0 1 : Pulse output mode
0 1 0 : Pulse period measurement mode
0 1 1 : Pulse width measurement mode
1 0 0 : Programmable waveform generating mode
1 0 1 : Programmable one-shot generating mode
1 1 0 : PWM mode
1 1 1 : Not used
Timer X write control bit
0 : Write data to both timer latch and timer
1 : Write data to timer latch only
Timer Y write control bit
0 : Write data to both timer latch and timer
1 : Write data to timer latch only
Output level latch
0 : "L" output
1 : "H" output
Output level latch
0 : "L" output
1 : "H" output
CNTR0 active edge switch bit
0 : • Event counter mode ; counts rising edges
• Pulse output mode ; output starts with “H” level
• Pulse period measurement mode ;
measures between two falling edges
• Pulse width measurement mode ; measures “H” periodes
• Programmable one-shot generating mode ;
after start at “L” level, output a “H” pulse
(interrupt request is triggered on falling edge)
1 : • Eevent counter mode ; counts falling edges
• Pulse output mode ; output starts with “L” level
• Pulse period measurement mode ;
measures between two rising edges
• Pulse width measurement mode ; measures “L” periodes
• Programmable one-shot generating mode ;
after start at “H” level, output a “L” pulse
(interrupt request is triggered on rising edge)
CNTR1 active edge switch bit
0 : • Event counter mode ; counts rising edges
• Pulse output mode ; output starts with “H” level
• Pulse period measurement mode ;
measures between two falling edges
• Pulse width measurement mode ; measures “H” periodes
• Programmable one-shot generating mode ;
after start at “L” level, output a “H” pulse
(interrupt request is triggered on falling edge)
1 : • Eevent counter mode ; counts falling edges
• Pulse output mode ; output starts with “L” level
• Pulse period measurement mode ;
measures between two rising edges
• Pulse width measurement mode ; measures “L” periodes
• Programmable one-shot generating mode ;
after start at “H” level, output a “L” pulse
(interrupt request is triggered on rising edge)
Timer X count source selection bits
b7 b6
0 0 : f(XIN)/2
0 1 : f(XIN)/16
1 0 : f(XCIN)
1 1 : Input signal from CNTR0 pin
Timer Y count source selection bits
b7 b6
0 0 : f(XIN)/2
0 1 : f(XIN)/16
1 0 : f(XCIN)
1 1 : Input signal from CNTR1 pin
b0
Timer XY control register
(TXYCON : address 001416)
Timer X stop control bit
0 : start counting
1 : stop counting
Timer Y stop control bit
0 : start counting
1 : stop counting
Not used (returns “0” when read)
Fig. 16. Structure of Timer X mode register, Timer Y mode register, and Timer XY control register
24
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FFFF16
TL
000016
TR
TR
TR
TL: A value set to a timer latch
TR: Timer interrupt request
Fig. 17. Timing chart of Timer•Event counter mode
FFFF16
TL
000016
TR
Waveform output from
CNTR0/CNTR1 pin
CNTR
TR
TR
TR
CNTR
TL: A value set to a timer latch
TR: Timer interrupt request
CNTR: CNTR0/CNTR1 interrupt request
This example’s condition:
CNTR0/CNTR1 active edge switch bit “0”:
⇒ output starts with “H” level, interrupt at falling edge
Fig. 18. Timing chart of Pulse output mode
25
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
000016
T3
T2
T1
FFFF16
TR
TR
T2
FFFF16+T1
T3
FFFF16
Signal input from
CNTR0/CNTR1 pin
CNTR
CNTR
CNTR
CNTR
TR: Timer interrupt request
CNTR: CNTR0/CNTR1 interrupt request
This example’s condition:
CNTR0/CNTR1 active edge switch bit set to “1”
⇒ measure from rising edge to rising edge; interrupt at rising edge
Fig. 19 Timing chart of Pulse period measurement mode
000016
T3
T2
T1
FFFF16
TR
FFFF16+T2
TR
T1
T3
Signal input from
CNTR0/CNTR1 pin
CNTR
TR: Timer interrupt request
CNTR: CNTR0/CNTR1 interrupt request
This example’s condition:
CNTR0/CNTR1 active edge switch bit set to “1”
⇒ measure “L” width; interrupt at rising edge
Fig. 20. Timing chart of Pulse width measurement mode
26
CNTR
CNTR
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FFFF16
T3
L
T2
T1
000016
Signal output from
CNTR0/CNTR1 pin
L
T3
T1
T2
TR
TR
TR
TR
CNTR
CNTR
L: Initial value of timer
TR: Timer interrupt request
CNTR: CNTR0/CNTR1 interrupt request
This example’s condition:
CNTR0/CNTR1 active edge switch bit set to “0”
⇒ output starts with “L” level; interrupt at falling edge
Fig. 21. Timing chart of Programmable waveform generating mode
FFFF16
L
TR
TR
TR
Signal input from
INT0/INT1 pin
Signal output from
CNTR0/CNTR1 pin
L
L
CNTR
L
CNTR
L: One-shot pulse width; timer latch value
TR: timer interrupt request
CNTR: CNTR0/CNTR1 interrupt request
This example’s condition:
CNTR0/CNTR1 active edge switch bit set to “0”
⇒ output a “H” pulse; interrupt at falling edge
Fig. 22. Timing chart of Programmable one-shot generating mode
27
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
ts
Timer X/Timer Y
count source
Timer X/Timer Y
PWM output signal
m ✕ ts
n ✕ ts
(m+n) ✕ ts
CNTR
TR
TR
CNTR: CNTR0/CNTR1 interrupt request
TR: Timer interrupt request
PWM waveform (duty : m/(m + n) and period: (m + n) ✕ ts) is output
m : the setting value of TXH/TYH (m = 0 to 255)
n: the setting value of TXL/TYL (n = 0 to 255)
ts: the period of timer X / timer Y count source
This example's condition:
CNTR0/CNTR1 active edge switch bit set to “0”
⇒ output starts with “H” level; interrupt at falling edge
Fig. 23. Timing chart of PWM mode
28
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
●Timer 1, Timer 2, Timer 3
Timer 1 to 3 are 8-bit timers for which the count source can be selected through timer 123 mode register.
b7
b0
(1) Timer 2 write control
Timer 2 write control bit (b2) of timer 123 mode register allows to
select whether a value written to timer 2 is written to timer latch and
timer synchronously or to the timer latch only.
If only the timer latch is written to, the value is set only to the reloadlatch by writing a value to the timer address at that time. The
content of timer is reloaded with the next underflow. Usually writing
operation to the timer latch and timer synchronously is selected. And
a value is written to the timer latch and timer synchronously when a
value is written to the timer address.
If only the timer latch is written to, it may occur that the value set to
the counter is not constant, when the timing with which the reloadlatch is written to and the underflow timing is nearly the same.
Timer 123 mode register
(T123M : address 002916)
TOUT output active edge switch bit
0 : start with "H" output
1 : start with "L" output
TOUT output control bit
0 : TOUT output disabled
1 : TOUT output enabled
Timer 2 write control bit
0 : Write data to both timer latch and timer
1 : Write data to timer latch only
Timer 2 count source selection bit
0 : Timer 1 output
1 : f(XIN)/16 (or f(XCIN)/16 in low-speed mode)
Timer 3 count source selection bit
0 : Timer 1 output
1 : f(XIN)/16 (or f(XCIN)/16 in low-speed mode)
Timer 1 count source selection bits
00 : f(XIN)/16 (or f(XCIN)/16 in low-speed mode)
01 : f(XIN)/2 (or f(XCIN)/2 in low-speed mode)
10 : f(XCIN)
11 : Not available
(2) Timer 2 output control
When timer 2 output (T OUT) is enabled, inverted signals are output
from T OUT pin each time timer 2 has underflow. For this reason, set
the double-function port of TOUT pin to output mode.
Not used (returns “0” when read)
■Precautions on timers 1 to 3
When the count source for timer 1 to 3 is switched, it may occur that
short pulses are generated in count signals and that the timer count
value shows big changes. When timer 1 output is selected as timer 2
or timer 3 count source, short pulses are generated to
signals output from timer 1 through writing timer 1. Due to that, the
count values for timer 2 and 3 may change very often.
Therefore, when the count sources for timer 1 to 3 are set, set the
values in order starting from timer 1.
Fig. 24. Structure of Timer 123 mode register
Data bus
f(XIN)/16
(f(XCIN)/16 in low-speed mode)
Timer 1 count source
selection bits
"00"
Timer 1 latch (8)
"01"
f(XIN)/2
Timer 1 (8)
(f(XCIN)/2 in low-speed mode)
"10"
f(XCIN)
Timer 2 count source
selection bit
Timer 2 latch (8)
"0"
Timer 2 (8)
"1"
f(XIN)/16
(f(XCIN)/16 in low-speed mode)
Timer 2 write
control bit
Timer 1
interrupt
request
Timer 2
interrupt
request
TOUT output
TOUT output active control bit
edge switch bit
"0"
Q S
P50/TOUT
P50 direction
register
P50 latch
"1"
T
Q
TOUT output control bit
f(XIN)/16
(f(XCIN)/16 in low-speed mode)
"0"
Timer 3 latch (8)
Timer 3 (8)
"1"
Timer 3 count source
selection bit
Timer 3
interrupt
request
Fig. 25. Block diagram of Timer
29
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
●Real time output port
The 3807 group has two on-chip sets of real time output ports (RTP).
The two sets of real time output ports consist of two 16-bit timers A
and B and eight 8-bit real time port registers. Synchronous to the
reloading of timers A and B, the real time port register values are
output from ports P82 to P87, P30 and P31. The real time port registers consist of 8-bit register 0 to 7. Each port with its corresponding
bits is shown in figure 26.
Timer A and timer B have each two 16-bit timer latches. Figure 26
shows the real time port block diagram and figure 27 and 28 show
the structure of the real time port control registers 0 to 3.
There are four operating modes for real time ports which are:
8 repeated load mode, 6 repeated load mode, 5 repeated load mode
and one-shot pulse generating mode. Each operating mode can be
set for timer A and timer B separately. However, switch modes during timer count stop.
(1) 8 repeated load mode
The output operation for each value of the real time port registers 7
to 0 is performed repeatedly in association with an alternate underflow
of the corresponding timer latch 1 or 0. The real time port output
pointer changes in sequence as a cycle of 8 repeated load operations as "7, 6, 5, 4, 3, 2, 1, 0, 7, 6, 5, 4, 3, 2, 1, 0, 7, 6, 5, ...."
The initial value at the generation of a start trigger can be specified
by setting a value in the output pointer. Figure 29 shows a timing
chart of 8 repeated load mode.
(2) 6 repeated load mode
The output operation for each value of real time port registers 5 to 0
is performed repeatedly in association with an alternate underflow of
the corresponding timer latch 1 to 0. The real time port output pointer
changes in sequence as a cycle of 6 repeated load operations as "5,
4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 5, 4, ...."
The initial value at the generation of a start trigger can be specified
by setting a value in the output pointer. Figure 30 shows a timing
chart of the 6 repeated load mode.
(3) 5 repeated load mode
The output operation for each value of real time port registers 4 to 0
is performed repeatedly in association with an alternate underflow of
the corresponding timer latch 1 or 0. The real time port output pointer
changes in sequence as a cycle of 5 repeated load operations as "4,
3, 2, 1, 0, 4, 3, 2, 1, 0, 4, 3, 2, 1, ...." The initial value at the generation
of a start trigger can be specified by setting a value in the output
pointer. Figure 31 shows a timing chart of the 5 repeated load mode.
(4) One-shot pulse generation mode
The output operation for each value of real time port registers 2 to 0
is performed only once in association with trigger generation and an
underflow of timer latch 1 or 0. After a trigger is generated, the value
of real time port register 1 is output from the real time output port and
the output pointer value becomes "000 2". At each underflow of the
timer, the each value of real time port registers 0 and 2 is output in
ascending sequence, then the operation is completed.
After completion of the operation, the value of real time port register
2 is continuously output from the real time output port and the output
pointer value continues to be "001 2" until the next start trigger is
30
generated. In this condition, the real time port function is in the wait
status.
When this mode is selected, the pointer value is not changed by
writing a value into the output pointer. If external trigger is specified
as trigger selection when this mode is selected, a rising and falling
double edge trigger is generated regardless of the contents of the
INT4 interrupt source bit (b7) of the interrupt edge selection register.
Figure 32 shows a timing chart of the one-shot pulse generation mode.
(5) Selection of timer interrupt mode
The timer is a count-down system. The contents of the timer latch
are reloaded by the count pulse subsequent to the moment when the
contents of the counter becomes "000016". At the same time, the
interrupt request bit corresponding to each timer is set to "1." The
interrupt request corresponding to the value of the real time port
output pointer can also be controlled. For controlling the interrupt
request bit, refer to the item pertaining to the timer interrupt mode
selection bit of the real time port control register 1,2 shown in figure
27 and 28.
(6) Switch of timer count source
The timer A and the timer B can select the system clock φ divided by
2 or 16 as a count source with the timer A, B count source selection
bit (b0) of real time port control register 0.
[Timer latches]
Each of the timer A and the timer B has two 16-bit timer latches. Data
is written into the 8 low-order bits and the 8 high-order bits in this
order. When the high-order side has been written, the next latch is
automatically specified. The writing pointer changes in sequence as
"1, 0, 1, 0, 1, ...." The timer latch to be written first can be specified by
setting the timer writing pointer. Data is not written directly into the
timer A and the timer B. When reading the contents of the timer, the
count value at that point of time is read. Read the high-order side first
and then the low-order side. The low-order side value is read with
the same timing as that for the high-order side value and held at the
timer read latch. The data held state is released by reading the loworder side. At a reload operation of the timer A or the timer B. Timer
latch 1 is reloaded as the initial value after a trigger is generated.
After that, the timer latch is reloaded in sequence as "0, 1, 0, 1, ...."
The timer latch value cannot be read out.
[Start trigger]
The operation of the real time port is started by a start trigger. When
a start trigger is generated, the value of the real time port register
specified by the output pointer (the value of real time port register 1
in the one-shot pulse generation mode) is output from the real time
output port.
The value of timer latch 1 is reloaded into the timer A or the timer B
and the timer count A, B source stop bit is released, so that the timer
count is started.
After that, when the timer underflows, data is transferred from the
real port register to the real time output port.
As a start trigger, either internal trigger or external trigger can be
selected by the timer A start trigger selection bit (b2) or timer B start
trigger selection bit (b5) of real time port control register 0.
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
When the internal trigger is selected, a start trigger is generated by
an input signal of the INT4 pin. The start trigger becomes a falling
edge when the INT4 interrupt edge selection bit is "0" and a rising
edge when this bit is "1".
When the external trigger is selected in the one-shot pulse generation mode, the start trigger becomes a rising/falling double edge trigger regardless of the contents of the INT 4 interrupt edge selection
bit.
[Real time port registers] RTP
The data to be output to real time ports is written into 8 real time port
registers 0 to 7. The correspondence between each bit of real time
port registers and each port output is as follows :
P31: bit 7 of real time port registers 7 to 0
P30: bit 6 of real time port registers 7 to 0
P87: bit 5 of real time port registers 7 to 0
P86: bit 4 of real time port registers 7 to 0
P85: bit 3 of real time port registers 7 to 0
P84: bit 2 of real time port registers 7 to 0
P83: bit 1 of real time port registers 7 to 0
P82: bit 0 of real time port registers 7 to 0
It can be selected for each bit by real time port control register 3
whether the output of each port is to be used as an ordinary I/O port
or a real time port output.
[Real time port data pointer]
It can be optionally specified by the real time port data pointers A or
B and the real time port data pointer A or B switching bit in which real
time port register the output data is to be set or form which real time
port register the data output is to be started.
When writing output data into the real time port register, set the real
time port data pointer A, B switch bit to "0" (select the R/W pointer)
and also write a value into the 3 bits of the real time port data
pointers A, B. With this, the real time port register for writing will be
specified. After that, when a value is written into the real time port
register (address 002A 16), the data is written into the specified real
time port register and also the R/W pointer value is automatically
decreased by 1. Then writing data is enabled into the next real time
port register.
A value of "0002" to "1112" can be set int the R/W pointer regardless
of the operating mode specified by the timer A, B operating mode
selection bit, and the R/W pointer value is automatically decreased
by 1 by writing data into the real time port register. However, when a
value becomes "0002", the R/W pointer value is decreased by 1 in
the numeral range of stages to be used in each operating mode unless the R/W pointer is set again at the subsequent write operation to
the real time port register. When "111 2 (=7)" is set in the R/W pointer,
the R/W pointer operation in each selected mode is as follows :
•During 8 repeated load mode 7➝6➝5➝4➝3➝2➝1➝0➝7➝6➝5...
•During 6 repeated load mode 7➝6➝5➝4➝3➝2➝1➝0➝5➝4➝3...
•During 5 repeated load mode 7➝6➝5➝4➝3➝2➝1➝0➝4➝3➝2....
•During one-shot pulse generation mode
7➝6➝5➝4➝3➝2➝1➝0➝2➝1➝0....
When reading the real time port register, set the real time port data
pointer A, B switch bit to "0" (select the R/W pointer) and also writing
a value into the 3 bits of the real time port data pointer A, B to specify
the real time port register for reading. After that, the value of the
specified real time port register can be read by reading the real time
port register (address 002A16). In this care, however, the R/W pointer
value is not counted down automatically. Accordingly, to read another real time port register, rewrite the R/W pointer beforehand.
To specify a read port register to be output to the real time output
port, set the real time port data pointer A, B switch bit to "1" (select an
output pointer) and also set a value in the 3 bits of the real time port
data pointer A or B.
When a start trigger is generated, data is output beginning with the
real time port register set in the output pointer and the output pointer
value is automatically decreased by 1.
At each underflow of the timer A or timer B, the output pointer value
is automatically decreased by 1. Regarding the case of the one-shot
pulse generation mode, however, refer to the item pertaining to the
one-shot pulse generation mode.
When the real time port data pointer A to B has been read, only the
output pointer can be read.
■Notes regarding all modes
•When the trigger is generated again during timer count operation,
the operation is started from the beginning. In this case, put an
interval of 3 cycles or more between the generation of a trigger and
the generation of the next trigger, If the generation of the next trigger occurs almost concurrently with the underflow timing of the timer,
the next real time output may not be performed normally.
•To stop the timer count after generation of a start trigger, write "1" in
the timer A, B count source stop bit of real time port control register
0 at an interval of 3 cycles or more of the timer count source.
•To change the contents of the real time port data pointer A, B switch
bit, the real time port data pointer must be specified simultaneously.
Therefore, use the LDM/STA instruction instead of the SEB/CLB
instruction.
•If the timer A, B count source stop bit is changed ("1"➝"0") by a start
trigger between the read operation and the write operation of a
read-modify-write instruction such as the SEB instruction which is
used in real time port control register 0, the timer count will stop,
having an effect on the real time output.
An maximum interval of 2 cycles of the count source is required
before the timer A, B count source stop bit is cleared to "0" which
indicates the count operation state after a start trigger is generated
regardless of whether the start trigger is an internal trigger or an
external trigger.
Accordingly, do not use the read-modify-write instruction for real
time port control register 0 in this period. If a write operation for real
time port control register 0 with any purpose other than stopping
the timer count is performed concurrently with the generation of a
start trigger, be sure to use such an instruction for writing "0" into
the timer A, B count source stop bit as the LDM/STA instruction.
Even if "0" is written into the timer A, B count source stop bit, the
timer count remains in the stop state without change.
•When the timing for writing to the high-order side reload latch is
almost equal to the underflow timing, an undesirable value may be
set in the timer A or timer B.
•If the real time output port is selected by real time port control register 3 after resetting, "L" is output from this pin until a start trigger is
generated.
31
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Data bus
Timer A write
pointer (1)
XCIN
"10"
1/2
Timer A, B
count source
"0" selection bit
Main clock division
ratio selection bits
XIN
P5
P301/RTP0
/RTP7
/PWM0
"00"
"01"
1/16
Timer A 1H latch (8)
Timer A 1L latch (8)
Timer A 0H latch (8)
Timer A 0L latch (8)
"1"
Timer A interrupt
request
Timer A (16)
Timer A count
source stop bit
P31 latch
Timer A read-out latch (8)
PWM0èoóÕ
Real time output
Real time port output selection bit (P31)
Timer B write
pointer (1)
P31 direction register
P30/RTP6
Timer B 1H latch (8)
Timer B 1L latch (8)
Timer B 0H latch (8)
Timer B 0L latch (8)
P30 latch
Real time output
Real time port output selection bit (P30)
P30 direction register
P87/RTP5
Timer B interrupt
request
Timer B (16)
PWM1èoóÕ
Timer B count
source stop bit
Timer B read-out latch (8)
Real time port • port
allocation selection bit
Real time port R/W
pointer A (3)
"1"
Real time port R/W
pointer B (3)
"0"
P87 latch
0
7
Real time port
register 0 (8)
Real time port
register 1 (8)
Real time port
register 2 (8)
Real time port
register 3 (8)
Real time port
register 4 (8)
Real time port
register 5 (8)
Real time port
register 6 (8)
Real time port
register 7 (8)
Real time output
Real time port output selection bit (P87)
P87 direction register
P86/RTP4
P86 latch
Real time output
Real time port output selection bit (P86)
P86 direction register
P85/RTP3
Real time port • port
allocation selection bit
"1"
Real time port output
pointer A (3)
"0"
Real time port output
pointer B (3)
P85 latch
Real time output
Real time port output selection bit (P85)
Output latch (8)
P85 direction register
P84/RTP2
P84 latch
Real time output
Real time port output selection bit (P84)
P84 direction register
P83/RTP1
When a start trigger bit is set to "1"
(internal trigger is selected)
A timer latch value is loaded into the timer
When an external start trigger is generated
(external trigger is selected)
A timer latch value is loaded into the timer
P83 latch
Real time output
Real time port output selection bit (P83)
operation
0
1
stop
P83 direction register
P82/RTP0
P82 latch
at reset
Timer count source stop bit is set to "1".
Real time output
Real time port output selection bit (P82)
P82 direction register
Fig. 26. Block diagram of Real time output port
32
State transition of timer count source stop bit
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b0
Real time port control register 0
(RTPCON0 : address 002B16)
Timer A, B count source selection bit
0: f(XIN)/2 or f(XCIN)/2
1: f(XIN)/16 or f(XCIN)/16
Real time port • port allocation selection bit
0: 4-4 port division
(P82 to P85 correspond to timer A; P86, P87, P30, P31 correspond to timer B)
1: 2-6 port division
(P82 to P87 correspond to timer A; P30, P31 correspond to timer B)
Timer A start trigger selection bit
0: Internal trigger (trigger is generated by setting bit 3 to “1”)
1: External trigger (trigger start by external input INT4)
(note)
Timer A start trigger bit (“0” at read-out)
0: Not triggered
1: Timer A start (when bit 2=”0”)
Timer A count source stop bit
0: Count operation (when a start trigger is generated, “0” is set automatically)
1: Count stop
Timer B start trigger selection bit
0: Internal trigger (trigger is generated by setting bit 6 to “1”)
1: External trigger (trigger start by external input INT4)
(note)
Timer B start trigger bit (“0” at read-out)
0: Not triggered
1: Timer B start (when bit 5=”0”)
Timer B count source stop bit
0: Count operation (when a start trigger is generated, “0” is set automatically)
1: Count stop
Note: Rising or falling edge of external input can be switched by the INT4 interrupt edge selection bit of interrupt edge selection register
(however, at one-shot pulse generating mode the timer is triggered at both rising and falling edge).
b7
b0
Real time port control register 1
(RTPCON1 : address 002C16)
Timer A operation mode selection bit
00: 8 repeated load mode
01: 6 repeated load mode
10: 5 repeated load mode
11: One-shot pulse generating mode
Real time port data pointer A switch bit (“1” at read-out )
0: R/W pointer
1: Output pointer
Timer A interrupt mode selection bit
0: Interrupt request occurs with RTP output pointer value “0002”
1: Interrupt request occurs regardless of RTP output pointer value
Real time port data pointer A (output pointer value at read-out)
000: indicates real time port register 0
001: indicates real time port register 1
010: indicates real time port register 2
011: indicates real time port register 3
100: indicates real time port register 4
101: indicates real time port register 5
110: indicates real time port register 6
111: indicates real time port register 7
Timer A write pointer
0: indicates timer A0 latch
1: indicates timer A1 latch
Fig. 27. Structure of Real time output port related register (1)
33
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b0
Real time port control register 2
(RTPCON2 : address 002D16)
Timer B operating mode selection bit
00: 8 repeated load mode
01: 6 repeated load mode
10: 5 repeated load mode
11: One-shot pulse generating mode
Real time port data pointer B switch bit (“1” at read-out )
0: R/W pointer
1: Output pointer
Timer B interrupt mode selection bit
0: Interrupt request occurs with RTP output pointer value “0002”
1: Interrupt request occurs regardless of RTP output pointer value
Real time port data pointer B (output pointer value at read-out)
000: indicates real time port register 0
001: indicates real time port register 1
010: indicates real time port register 2
011: indicates real time port register 3
100: indicates real time port register 4
101: indicates real time port register 5
110: indicates real time port register 6
111: indicates real time port register 7
Timer B write pointer
0: indicates timer B0 latch
1: indicates timer B1 latch
b7
b0
Real time port control register 3
(RTPCON3 : address 002E16)
Real time port output selection bit (P82)
0: I/O port
1: Real time output port
Real time port output selection bit (P83)
0: I/O port
1: Real time output port
Real time port output selection bit (P84)
0: I/O port
1: Real time output port
Real time port output selection bit (P85)
0: I/O port
1: Real time output port
Real time port output selection bit (P86)
0: I/O port
1: Real time output port
Real time port output selection bit (P87)
0: I/O port
1: Real time output port
Real time port output selection bit (P30)
0: I/O port
1: Real time output port
Real time port output selection bit (P31)
0: I/O port
1: Real time output port
Fig. 28 Structure of Real time output port related register (2)
34
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timer A operating mode selection bit: in case of 8 repeated load mode
4-4 port division
Synchronous to the start trigger the timer latch value is
loaded into the timer and timer count operation starts.
Timer count source
stop bit
Timer A count value
Port P82 / RTP0
Port P83 / RTP1
Port P84 / RTP2
Port P85 / RTP3
Real time port output
pointer A
A1
A0
A1
A0
A1
A0
A1
A0
A1
A0
A1
#7
#6
#5
#4
#3
#2
#1
#0
#7
#6
#5
1
1
0
0
0
0
0
1
1
1
0
0
1
1
1
0
0
0
0
0
1
1
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
5
4
3
7
6
5
4
A0
A1
6
7
2
1
0
#7—0: Data of real time port registers 7 to 0
Fig. 29. 8 repeated load mode operation
Timer A operating mode selection bit: in case of 6 repeated load mode
4-4 port division (3 ports out of P82/RTP0 to P85/RTP3 are used)
Synchronous to the start trigger the timer latch value is
loaded into the timer and timer count operation starts.
Timer count
source stop bit
Timer A count value
Port P82 / RTP0
Port P83 / RTP1
Port P84 / RTP2
Real time port output
pointer A
5
A1
A0
A1
#5
#4
#3
1
1
0
A0
A1
A0
A1
A0
A1
#2
#1
#0
#5
#4
#3
#2
#1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
0
1
1
1
0
0
0
1
1
4
3
2
0
5
4
3
2
1
0
1
#5—0: Data of real time port registers 5 to 0
Fig. 30. 6 repeated load mode operation
35
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timer A operating mode selection bit: in case of 5 repeated load mode
2-6 division (5 ports out of P82/RTP0 to P87/RTP5 are used)
Synchronous to the start trigger the timer latch value is
loaded into the timer and timer count operation starts.
Timer count
source stop bit
Timer A count value
A1
A0
A1
A0
A1
A0
A1
A0
A1
A0
#4
#3
#2
#1
#0
#4
#3
#2
#1
#0
1
0
0
0
1
1
0
0
0
1
1
1
0
0
0
1
1
0
0
0
0
1
1
0
0
0
1
1
0
0
0
0
1
1
0
0
0
1
1
0
0
0
0
1
1
0
0
0
1
1
3
2
1
0
4
3
2
1
0
4
Port P82 / RTP0
Port P83 / RTP1
Port P84 / RTP2
Port P85 / RTP3
Port P86 / RTP4
Real time port output
pointer A
4
#4—0: Data of real time port registers 4 to 0
Fig. 31. 5 repeated load mode operation
Timer A operating mode selection bit: in case of one-shot pulse generating mode
Synchronous to the start trigger the timer latch value is
loaded into the timer and timer count operation starts.
External start trigger input
INT4
Timer count
source stop bit
Counting stops when timer
A0 latch has underflow
Counting stops when timer
A0 latch has underflow
Timer A count value
A1
A0
A1
A0
#1
#0
#2
#1
#0
#2
0
1
0
0
1
0
Port P83 / RTP1
1
1
0
1
1
0
Real time port output
pointer A
0
2
1
0
2
1
Port P82 / RTP0
#2—0: Data of real time port registers 2 to 0
Fig. 32. One-shot pulse generating mode operation
36
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Serial I/O
●Serial I/O1
(1) Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O1 mode can be selected by setting the
serial I/O1 mode selection bit (b6) of the serial I/O1 control register
to "1." For clock synchronous serial I/O, the transmitter and the
receiver must use the same clock for serial I/O1 operation. If an
internal clock is used, transmit/receive is started by a write signal to
the Transmit/Receive buffer register (TB/RB) (address:0018 16).
Serial I/O1 can be used as either clock synchronous or asynchronous (UART) serial I/O. A dedicated timer (baud rate generator) is
also provided for baud rate generation during Serial I/O1 operation.
Data bus
Serial I/O 1 control register
Address 001816
Receive buffer register
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Receive shift register
P44/RXD
Address 001A16
Shift clock
Clock control circuit
P46/SCLK1
Serial I/O1 synchronous clock selection bit
Division ratio 1/(n+1)
BRG count source selection bit
f(X
IN)
XIN
Baud rate generator
1/4
(f(XCIN) in low-speed mode)
Address 001C16
1/4
P47/SRDY1
F/F
Clock control circuit
Falling edge detector
Transmit shift register shift
completion flag (TSC)
Transmit interrupt source selection bit
Transmit interrupt request (TI)
Shift clock
P45/TXD
Transmit shift register
Transmit buffer register
Address 001816
Transmit buffer empty flag (TBE)
Serial I/O1 status register
Address 001916
Data bus
Fig. 33. Block diagram of clock synchronous serial I/O1
Transmit/Receive shift clock
(1/2—1/2048 of internal
clock or external clock)
Serial output TxD
D0
D1
D2
D3
D4
D5
D6
D7
Serial input RxD
D0
D1
D2
D3
D4
D5
D6
D7
Receive enable signal SRDY1
Write-in signal to transmit/receive
buffer register (address 001816)
TBE = 0
TBE = 1
TSC = 0
RBF = 1
TSC = 1
Overrun error (OE)
detection
Notes 1 : The transmit interrupt (TI) can be selected to occur either when the transmit buffer has emptied (TBE=1) or after the
transmit shift operation has ended (TSC=1), by setting transmit interrupt source selection bit (TIC) of the serial I/O1
control register.
2 : If data is written to the transmit buffer register when TSC=0, the transmit clock is generated continuously and serial
data is output continuously from the TxD pin.
3 : The receive interrupt (RI) is set when the receive buffer full flag (RBF) becomes “1” .
Fig. 34. Operation of clock synchronous serial I/O1 function
37
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
The transmit and receive shift registers each have a buffer (the two
buffers have the same address in memory). Since the shift register
cannot be written to or read from directly, transmit data is written to
the transmit buffer, and receive data is read from the receive buffer.
The transmit buffer can also hold the next data to be transmitted,
and the receive buffer can hold a character while the next character is being received.
(2) Asynchronous Serial I/O (UART) Mode
Asynchronous serial I/O1 mode (UART) can be selected by clearing the Serial I/O1 mode selection bit (b6) of the Serial I/O1 control
register to "0." Eight serial data transfer formats can be selected
and the transfer formats used by a transmitter and receiver must
be identical.
Data bus
Address 001816
P44/RXD
Serial I/O1 control register Address 001A16
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Receive buffer register
OE
Character length selection bit
7 bit
STdetector
Receive shift register
1/16
8 bit
PE FE
UART control register
SP detector
Clock control circuit
P46/SCLK1
f(XIN)
Address 001B16
Serial I/O1 synchronous clock
selection bit
Division ratio 1/(n+1)
Baud rate generator
Address 001C16
BRG count source selection bit
(f(XCIN) in low-speed mode)
1/4
ST/SP/PA generator
Transmit shift register shift
completion flag (TSC)
1/16
P45/TXD
Transmit interrupt source selection bit
Transmit interrupt request (TI)
Transmit shift register
Character length selection bit
Transmit buffer register
Address 001816
Transmit buffer empty flag (TBE)
Serial I/O1 status register Address 001916
Data bus
Fig. 35. Block diagram of UART serial I/O1
Transmit or receive clock
Write-in signal to
transmit buffer register
TBE=0
TSC=0
TBE=1
TBE=0
TBE=1
TSC=1*
Serial output TXD
ST
D0
D1
SP
ST
D0
D1
1 start bit
7 or 8 data bit
1 or 0 parity bit
1 or 2 stop bit
Read-out signal from
receive buffer register
SP
* Generated at 2nd bit in 2-stop bit mode
RBF=0
RBF=1
RBF=1
Serial input RXD
ST
D0
D1
SP
ST
D0
D1
SP
Notes 1: Error flag detection occurs at the same time that the RBF flag becomes "1" (at 1st stop bit, during reception).
2: The transmit interrupt (TI) can be selected to occur when either the TBE or TSC flag becomes "1", depending on the setting of the transmit interrupt
source selection bit (TIC) of the serial I/O1 control register.
3: The receive interrupt (RI) is set when the RBF flag becomes "1".
4: After data is written to the transmit buffer register when TSC=1, 0.5 to 1,5 cycles of the data shift cycle is necessary until changing to TSC=0.
Fig. 36. Operation of UART serial I/O1 function
38
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
All bits of the serial I/O1 status register are initialized to "0" at reset,
but if the transmit enable bit (b4) of the serial I/O1 control register
has been set to "1", the transmit shift register shift completion flag
(b2) and the transmit buffer empty flag (b0) become "1."
[Transmit Buffer Register/Receive Buffer Register] TB/RB (001816)
The transmit buffer and the receive buffer are located in the same
address. The transmit buffer is write-only and the receive buffer is
read-only. If a character bit length is 7 bits, the MSB of data stored in
the receive buffer is "0".
[Serial I/O1 Control Register] SIO1CON (001A16 )
The serial I/O1 control register contains eight control bits for serial
I/O1 functions.
[Serial I/O 1 Status Register] SIO1STS (001916)
The read-only serial I/O1 status register consists of seven flags (b0
to b6) which indicate the operating status of the serial I/O1 function
and various errors. Three of the flags (b4 to b6) are only valid in
UART mode. The receive buffer full flag (b1) is cleared to "0" when
the receive buffer is read.
The error detection is performed at the same time data is transferred
from the receive shift register to the receive buffer register, and the
receive buffer full flag is set. A writing to the serial I/O1 status register clears all the error flags OE, PE, FE, and SE (b3 to b6, respectively). Writing "0" to the serial I/O1 enable bit (SIOE : b7 of the serial
I/O1 control register) also clears all the status flags, including the
error flags.
b7
b0
Serial I/O1 status register
(SIO1STS : address 001916)
Transmit buffer empty flag (TBE)
0: Buffer full
1: Buffer empty
Receive buffer full flag (RBF)
0: Buffer empty
1: Buffer full
Transmit shift register shift completion flag (TSC)
0: Transmit shift in progress
1: Transmit shift completed
Overrun error flag (OE)
0: No error
1: Overrun error
Parity error flag (PE)
0: No error
1: Parity error
Framing error flag (FE)
0: No error
1: Framing error
Summing error flag (SE)
0: (OE) U (PE) U (FE)=0
1: (OE) U (PE) U (FE)=1
Not used (returns "1" when read)
b7
b0
UART control register
(UARTCON : address 001B16)
Character length selection bit (CHAS)
0: 8 bits
1: 7 bits
[UART Control Register] UARTCON (001B16 )
The UART control register consists of four control bits (b0 to b3)
which are valid when asynchronous serial I/O is selected and set the
data format of an data transfer. One bit in this register (b4) is
always valid and sets the output structure of the P45/TxD pin.
[Baud Rate Generator] BRG (001C16)
The baud rate generator determines the baud rate for serial transfer.
With the 8-bit counter having a reload register the baud rate generator divides the frequency of the count source by 1/(n+1), where n is
the value written to the baud rate generator.
b7
b0
Serial I/O1 control register
(SIO1CON : address 001A16)
BRG count source selection bit (CSS)
(f(XCIN) in low-peed mode)
0: f(XIN)
1: f(XIN)/4 ((XCIN)/4 in low-speed mode)
Serial I/O1 synchronous clock selection bit (SCS)
0: BRG/ 4
(when clock synchronous serial I/O is selected)
BRG/16 (UART is selected)
1: External clock input
(when clock synchronous serial I/O is selected)
External clock input/16 (UART is selected)
SRDY1 output enable bit (SRDY)
0: P47 pin operates as ordinaly I/O pin
1: P47 pin operates as SRDY1 output pin
Transmit interrupt source selection bit (TIC)
0: Interrupt when transmit buffer has emptied
1: Interrupt when transmit shift operation is completed
Transmit enable bit (TE)
0: Transmit disabled
1: Transmit enabled
Receive enable bit (RE)
0: Receive disabled
1: Receive enabled
Serial I/O1 mode selection bit (SIOM)
0: Asynchronous serial I/O (UART)
1: Clock synchronous serial I/O
Serial I/O1 enable bit (SIOE)
0: Serial I/O1 disabled
(pins P44 to P47 operate as ordinary I/O pins)
1: Serial I/O1 enabled
(pins P44 to P47 operate as serial I/O pins)
Parity enable bit (PARE)
0: Parity cheching disabled
1: Parity checking enabled
Parity selection bit (PARS)
0: Even parity
1: Odd parity
Stop bit length selection bit (STPS)
0: 1 stop bit
1: 2 stop bits
P45/TXD P-channel output disable bit (POFF)
0: CMOS output (in output mode)
1: N-channel open-drain output (in output mode)
Not used (return "1" when read)
Fig. 37. Structure of serial I/O1 related register
39
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
●Serial I/O2
The serial I/O2 can be operated only as the clock synchronous
type. As a synchronous clock for serial transfer, either internal clock
or external clock can be selected by the serial I/O2 synchronous
clock selection bit (b6) of serial I/O2 control register 1.
The internal clock incorporates a dedicated divider and permits
selecting 6 types of clock by the internal synchronous clock selection bit (b2, b1, b0) of serial I/O2 control register 1.
Regarding SOUT2 and SCLK2 being output pins, either CMOS output
format or N-channel open-drain output format can be selected by
the P71/SOUT2 , P72/SCLK2 P-channel output disable bit (b7) of
serial I/O2 control register 1.
When the internal clock has been selected, a transfer starts by a
write signal to the serial I/O2 register (address 001F16). After completion of data transfer, the level of the SOUT2 pin goes to high impedance automatically but bit 7 of the serial I/O2 control register 2 is
not set to "1" automatically.
When the external clock has been selected, the contents of the
serial I/O2 register is continuously sifted while transfer clocks are
input. Accordingly, control the clock externally. Note that the SOUT2
pin does not go to high impedance after completion of data transfer.
To cause the SOUT2 pin to go to high impedance in the case where
the external clock is selected, set bit 7 of the serial I/O2 control
register 2 to "1" when SCLK2 is "H" after completion of data transfer.
After the next data transfer is started (the transfer clock falls), bit 7
of the serial I/O2 control register 2 is set to "0" and the SOUT2 pin is
put into the active state.
Regardless of the internal clock to external clock, the interrupt request bit is set after the number of bits (1 to 8 bits) selected by the
optional transfer bit is transferred. In case of a fractional number of
bits less than 8 bits as the last data, the received data to be stored
in the serial I/O2 register becomes a fractional number of bits close
to MSB if the transfer direction selection bit of serial I/O2 control
register 1 is LSB first, or a fractional number of bits close to LSB if
the said bit is MSB first. For the remaining bits, the previously received data is shifted.
At transmit operation using the clock synchronous serial I/O, the
SCMP2 signal can be output by comparing the state of the transmit
pin SOUT2 with the state of the receive pin SIN2 in synchronization
with a rise of the transfer clock. If the output level of the SOUT2 pin is
equal to the input level to the SIN2 pin, "L" is output from the SCMP2
pin. If not, "H" is output. At this time, an INT2 interrupt request can
also be generated. Select a valid edge by bit 2 of the interrupt edge
selection register (address 003A16).
[Serial I/O2 Control Registers 1, 2] SIO2CON1 / SIO2CON2
The serial I/O2 control registers 1 and 2 are containing various selection bits for serial I/O2 control as shown in Figure 40.
40
b7
b0
Serial I/O2 control register 1
(SIO2CON1 : address 001D16)
Internal synchronous clock selection bit
b2 b1 b0
0 0 0: f(XIN)/8 (f(XCIN)/8 in low-speed mode)
0 0 1: f(XIN)/16 (f(XCIN)/16 in low-speed mode)
0 1 0: f(XIN)/32 (f(XCIN)/32 in low-speed mode)
0 1 1: f(XIN)/64 (f(XCIN)/64 in low-speed mode)
1 1 0: f(XIN)/128 f(XCIN)/128 in low-speed mode)
1 1 1: f(XIN)/256 (f(XCIN)/256 in low-speed mode)
Serial I/O2 port selection bit
0: I/O port
1: SOUT2,SCLK2 output pin
SRDY2 output enable bit
0: P73 pin is normal I/O pin
1: P73 pin is SRDY2 output pin
Transfer direction selection bit
0: LSB first
1: MSB first
Serial I/O2 synchronous clock selection bit
0: External clock
1: Internal clock
P71/SOUT2 ,P72/SCLK2 P-channel output disable bit
0: CMOS output (in output mode)
1: N-channel open-drain output (in output mode )
b7
b0
Serial I/O2 control register 2
(SIO2CON2 : address 001E16)
Optional transfer bits
b2 b1 b0
0 0 0: 1 bit
0 0 1: 2 bit
0 1 0: 3 bit
0 1 1: 4 bit
1 0 0: 5 bit
1 0 1: 6 bit
1 1 0: 7 bit
1 1 1: 8 bit
Not used ( returns "0" when read)
Serial I/O2 I/O comparison signal control bit
0: P51 I/O
1: SCMP2 output
SOUT2 pin control bit (P71)
0: Output active
1: Output high-impedance
Fig. 38 Structure of Serial I/O2 control registers 1, 2
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Internal synchronous
clock selection bit
1/8
XCIN
1/16
"10"
"00"
"01"
XIN
Serial I/O2 synchronous
clock selection bit
"0"
"1"
SRDY2 output enable bit
"1"
Synchronous circuit
SCLK2
SRDY2
1/64
1/128
1/256
P73 latch
P73/SRDY2
Data bus
1/32
Divider
Main clock division ratio
selection bits (Note)
"0"
External clock
P72 latch
Optional transfer bits (3)
"0"
P72/SCLK2
Serial I/O2
interrupt request
Serial I/O counter 2 (3)
"1"
Serial I/O2 port selection bit
P71 latch
"0"
P71/SOUT2
"1"
Serial I/O2 port selection bit
Serial I/O2 register (8)
P70/SIN2
P51 latch
"0"
D
P51/SCMP2/INT2
Q
"1"
Serial I/O2 I/O comparison
signal control bit
Note: Either high-speed, middle-speed or low-speed mode is selected by bits 6 and 7 of CPU mode register.
Fig. 39. Block diagram of Serial I/O2
Transfer clock (Note 1)
Write-in signal to
serial I/O2 register
(Note 2)
Serial I/O2 output SOUT2
D0
D1
.
D2
D3
D4
D5
D6
D7
Serial I/O2 input SIN2
Receive enable signal SRDY2
Serial I/O2 interrupt request bit set
Notes 1: When the internal clock is selected as a transfer clock, the f(XIN) clock division (f(XCIN) in low-speed mode) can be selected
by setting bits 0 to 2 of serial I/O2 control register 1.
2: When the internal clock is selected as a transfer clock, the SCOUT2 pin has high impedance after transfer completion.
Fig. 40. Timing chart of Serial I/O2
41
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
SCMP2
SCLK2
SOUT2
SIN2
Judgement of I/O data comparison
Fig. 41 S CMP2 output operation
42
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
A-D Converter
f(XIN) to at least 500kHz during A-D conversion. Use a CPU system
clock dividing the main clock XIN as the internal clock φ .
[A-D Conversion Register] AD (address 003516 )
The A-D conversion register is a read-only register that contains the
result of an A-D conversion. When reading this register during an
A-D conversion, the previous conversion result is read.
■Note
When the A-D external trigger is invalidated by the AD external
trigger valid bit, any interrupt request is not generated at a fall of the
ADT input. When the AD external trigger valid bit is set to "1" beforehand, A-D conversion is not started by writing "0" into the AD conversion completion bit and "0" is not written into the AD conversion
completion bit. Do not set "0" in the AD conversion completion bit
concurrently with the timing at which the AD external trigger valid bit
is rewritten. Put an interval of at least 50 cycles to more of the
internal clock φ between a start of A-D conversion and the next start
of A-D conversion.
[A-D Control Register] ADCON
The A-D control register controls the A-D conversion process. Bits 0
to 3 of this register select specific analog input pins. Bit 4 signals the
completion of an A-D conversion. The value of this bit remains at "0"
during an A-D conversion, then changes to "1" when the A-D conversion is completed. Writing "0" to this bit starts the A-D conversion.
When bit 6, which is the AD external trigger valid bit, is set to "1", this
bit enables A-D conversion at a falling edge of an ADT input. Set
ports which is also used as ADT pins to input when using an A-D
external trigger. Bit 5 is the ADV REF input switch bit. Writing "1" to
this bit, this bit always causes ADVREF connection. Writing "0" to this
bit causes ADV REF connection only during A-D conversion and cut
off when A-D conversion is completed.
b7
b0
A-D control register
(ADCON : address 003416)
Analog input pin selection bit
0000: P73/SRDY2/ADT/AN0
0001: P74/AN1
0010: P75/AN2
0011: P76/AN3
0100: P77/AN4
0101: P60/AN5
0110: P61/AN6
0111: P62/AN7
1000: P63/CMPIN/AN8
1001: P64/CMPREF/AN9
1010: P65/DAVREF/AN10
1011: P80/DA3/AN11
1100: P81/DA4/AN12
[Comparison Voltage Generator]
The comparison voltage generator divides the voltage between AV SS
and ADVREF by 256, and outputs the divided voltages.
[Channel Selector]
The channel selector selects one of the input ports AN 12 to AN0 and
inputs it to the comparator.
AD conversion completion bit
0: Conversion in progress
1: Conversion completed
ADVREF input switch bit
0: OFF
1: ON
[Comparator and Control Circuit]
The comparator and control circuit compares an analog input
voltage with the comparison voltage and stores the result in the A-D
conversion register. When an A-D conversion is completed, the
control circuit sets the AD conversion completion bit and the AD
conversion interrupt request bit to "1."
Note that the comparator is constructed linked to a capacitor, so set
AD external trigger valid bit
0: A-D external trigger invalid
1: A-D external trigger valid
Interrupt source selection bit
0: Interrupt request at A-D
conversion completed
1: Interrupt request at ADT
input falling
Fig. 42. Structure of A-D control register
Data bus
b7
b0
A-D control register
4
A-D control circuit
Channel selector
P73/SRDY2/ADT/AN0
P74/AN1
P75/AN2
P76/AN3
P77/AN4
P60/AN5
P61/AN6
P62/AN7
P63/CMPIN/AN8
P64/CMPREF/AN9
P65/DAVREF/AN10
P80/DA3/AN11
P81/DA4/AN12
Comparator
ADT/A-D interrupt request
A-D conversion register
8
Resistor ladder
AVSS ADVREF
Fig. 43. Block diagram of A-D converter
43
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
D-A Converter
The 3807 group has an on-chip D-A converter with 8-bit resolution
and 4 channels (DAi (i=1—4)). The D-A converter is performed by
setting the value in the D-A conversion register. The result of D-A
converter is output from DAi pin by setting the DAi output enable bits
to "1." When using the D-A converter, the corresponding port direction register bit (P6 5/DAVREF/AN10, P56/DA1, P57/DA2, P80/DA3/AN11,
P81/DA4/AN12) should be set to "0" (input status).
The output analog voltage V is determined by the value n (base 10)
in the D-A conversion register as follows:
b0
b7
D-A control register
(DACON : address 003316)
DA1 output enable bit
DA2 output enable bit
DA3 output enable bit
DA4 output enable bit
Not used (return "0" when read)
V=DAVREF x n/256 (n=0 to 255)
Where DAV REF is the reference voltage.
0 : Output disabled
1 : Output enabled
At reset, the D-A conversion registers are cleared to "0016 ", the DAi
output enable bits are cleared to "0", and DAi pin is set to input (high
impedance). The DA output is not buffered, so connect an external
buffer when driving a low-impedance load.
Fig. 44. Structure of D-A control register
Data bus
D-A1 conversion register (003616)
D-A2 conversion register (003716)
D-A3 conversion register (003816)
D-A4 conversion register (003916)
D-A i conversion register (8)
R-2R resistor ladder
DA i output enable bit
P56/DA1
P57/DA2
P80/DA3/AN11
P81/DA4/AN12
Fig. 45. Block diagram of D-A converter
DA i output enable bit (Note)
P56/DA1
P57/DA2
P80/DA3/AN11
P81/DA4/AN12
"0"
R
"1"
2R
"0"
"1"
AVSS
P65/DAVREF/AN10
Note: i=1 to 4
Fig. 46. Equivalent connection circuit of D-A converter
44
2R
R
2R
R
2R
R
2R
R
2R
R
2R
2R
2R
LSB
MSB
D-A i conversion
register (Note)
R
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Analog Comparator
An analog comparator circuit which is independent of peripheral circuits in the microcomputer is incorporated (Note).
An analog comparator outputs the result of comparison with an input
voltage of CMP REF pin which is specified as a reference voltage and
an input voltage of CMP IN pin to CMPOUT pin. The result is "1" when
the input voltage to port CMP IN is higher than the voltage applied to
port CMPREF and "0" when the voltage is lower.
Because the analog comparator consists of an analog MOS circuit,
set the input voltage to the CMPIN pin and the CMPREF pin within the
following range :
■Note
The analog comparator circuit is separated from the MCU internal
peripheral circuit in the microcomputer. Accordingly, even if the microcomputer runs away, the analog comparator is still in operation.
For this reason, the analog comparator can be used for safety circuit
design.
VSS +1.2 V to CMPVCC–0.5V
CMPVCC
P63/CMPIN /AN8
+
–
P64/CMPREF /AN9
CMPOUT
AVSS
Fig. 47. Block diagram of Analog comparator
45
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Watchdog Timer
The watchdog timer gives a mean of returning to the reset status
when a program cannot run on a normal loop (for example, because
of a software run-away). The watchdog timer consists of an 8-bit
watchdog timer L and a 8-bit watchdog timer H.
●Standard operation of watchdog timer
When any data is not written into the watchdog timer control register
(address 001716 ) after resetting, the watchdog timer is in the stop
state. The watchdog timer starts to count down by writing an optional
value into the watchdog timer control register (address 0017 16) and
an internal resetting takes place at an underflow of the watchdog
timer H.
Accordingly, programming is usually performed so that writing to the
watchdog timer control register (address 001716) may be started
before an underflow. When the watchdog timer control register
(address 0017 16) is read, the values of the 6 high-order bits of the
watchdog timer H, STP instruction disable bit, and watchdog timer H
count source selection bit are read.
(2) Watchdog timer H count source selection bit operation
Bit 7 of the watchdog timer control register (address 001716 ) permits
selecting a watchdog timer H count source. When this bit is set to
"0", the count source becomes the underflow signal of watchdog timer
L. The detection time is set then to f(X IN)=131.072 ms at 8 MHz
frequency and f(XCIN)=32.768 s at 32 kHz frequency.
When this bit is set to "1", the count source becomes the signal
divided by 16 for f(XIN) (or f(XCIN)). The detection time in this case is
set to f(XIN)=512 µs at 8 MHz frequency and f(XCIN)=128 ms at 32
KHz frequency. This bit is cleared to "0" after resetting.
(3) Operation of STP instruction disable bit
Bit 6 of the watchdog timer control register (address 001716 ) permits
disabling the STP instruction when the watchdog timer is in operation.
When this bit is "0", the STP instruction is enabled.
When this bit is "1", the STP instruction is disabled.
Once the STP instruction is executed, an internal resetting takes place.
When this bit is set to "1", it cannot be rewritten to "0" by program.
This bit is cleared to "0" after resetting.
(1) Initial value of watchdog timer
At reset or writing to the watchdog timer control register (address
001716), each watchdog timer H and L is set to "FF16."
“FF16” is set when
watchdog timer
control register is
written to.
XCIN
XIN
“FF16” is set when
watchdog timer
control register is
written to.
"0"
"10"
Main clock division
ratio selection bits
(Note)
Data bus
Watchdog timer L (8)
1/16
"1"
"00"
"01"
Watchdog timer H (8)
Watchdog timer H count
source selection bit
STP instruction disable bit
STP instruction
Reset
circuit
RESET
Note: Either high-speed, middle-speed or low-speed mode is selected by bits 7 and 6 of CPU mode register.
Fig. 48. Block diagram of Watchdog timer
b7
b0
Watchdog timer control register
(WDTCON : address 001716)
Watchdog timer H (for read-out of high-order 6 bit)
STP instruction disable bit
0: STP instruction enabled
1: STP instruction disabled
Watchdog timer H count source selection bit
0: Watchdog timer L underflow
1: f(XIN)/16 or f(XCIN)/16
Fig. 49. Structure of Watchdog timer control register
46
Internal reset
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Clock output function
The internal clock φ can be output from I/O port P34. Control of I/O
ports and clock output function can be performed by port P2P3
control register (address 001516).
b7
b0
Port P2P3 control register
(P2P3C : address 001516)
(1) I/O ports or clock output function selection
The P3 4 clock output control bit (b0) of port P2P3 control register
selects the I/O port or clock output function. When clock output
function is selected, the clock is output regardless of the port P3 4
direction register settings.
Directly after bit 0 is written to, the port or clock output is switched
synchronous to a falling edge of clock frequency selected by the
output clock frequency selection bit. When memory expansion mode
or microprocessor mode is selected in CPU mode register (b1, b0),
clock output is selected on regardless of P34 clock output control bit
settings or port P34 direction register settings.
P34 clock output control bit
0: I/O port
1: Clock output
Output clock frequency selection bits
000: φ
001: f(XCIN)
010: "L" fixed for output
011: "L" fixed for output
100: f(XIN)
(f(XCIN) in low-speed mode)
101: f(XIN)/2 (f(XCIN)/2 in low-speed mode)
110: f(XIN)/4 (f(XCIN)/4 in low-speed mode)
111: f(XIN)/16 (f(XCIN)/16 in low-speed mode)
Not used (return "0" when read)
P2•P32 input level selection bit
0: CMOS level input
1: TTL level input
(2) Selection of output clock frequency
The output clock frequency selection bits (b3, b2, b1) of port P2P3
control register select the output clock frequency.
The output waveform when f(X IN) or f(XCIN) is selected, depends on
X IN or X CIN input waveform however; all other output waveform
settings have a duty cycle of 50%.
Fig. 50. Structure of Port P2P3 control register
P34 direction register
P34 clock output control bit
Microprocessor mode/memory expansion mode
P34 port latch
Output clock frequency
selection bits
"000"
"001"
XCIN
Main clock division ratio
selection bits (Note)
P34/CKOUT/ø
Low-speed mode
"100"
High-speed or
middle-speed
mode
1/2
1/4
1/16
XIN
"101"
"110"
"111"
"010"
"011"
Note: Either high-speed, middle-speed or low-speed mode is selected by bits 7 and 6 of CPU mode register.
Fig. 51. Block diagram of Clock output function
47
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Reset Circuit
Poweron
______
To reset the microcomputer, RESET pin should be held at an "L"
______
level for 2 µs or more. Then the RESET pin is returned to an "H" level
(the power source voltage should be between 2.7 V and 5.5 V, and
the oscillation should be stable), reset is released. After the reset is
completed, the program starts from the address contained in address
FFFD16 (high-order byte) and address FFFC16 (low-order byte). Make
sure that the reset input voltage is less than 0.54 V for VCC of 2.7 V.
RESET
Power source
voltage
0V
VCC
Reset input
voltage
0V
(Note)
0.2VCC
Note : Reset release voltage ; Vcc=2.7 V
RESET
VCC
Power source
voltage detection
circuit
Fig. 52. Reset circuit example
XIN
φ
RESET
Internal
reset
?
?
Address
?
?
FFFC
FFFD
ADH,L
Reset address from the vector table.
?
Data
?
?
?
ADL
ADH
SYNC
XIN: 10.5 to 18.5 clock cycles
Notes 1: The frequency relation of f(XIN) and f(φ) is f(XIN)=8 • f(φ).
2: The question marks (?) indicate an undefined state that depends on the previous state.
Fig. 53. Reset sequence
48
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Address Register contents
Address Register contents
(1) Port P0
000016
0016
(34) Timer 3
002616
FF16
(2) Port P0 direction register
000116
0016
(35) Timer X mode register
002716
0016
(3) Port P1
000216
0016
(36) Timer Y mode register
002816
0016
(4) Port P1 direction register
000316
0016
(37) Timer 123 mode register
002916
0016
(5) Port P2
000416
0016
(38) Real time port register 0—7
002A16
0016
(6) Port P2 direction register
000516
0016
(39) Real time port control register 0
002B16 1 0 0 1 0 0 0 0
(7) Port P3
000616
0016
(40) Real time port control register 1
002C16 1
(8) Port P3 direction register
000716
0016
R/W pointer
1 1 1
(9) Port P4
000816
0016
Output pointer
1 1 1
(10) Port P4 direction register
000916
0016
(41) Real time port control register 2
(11) Port P5
000A16
0016
R/W pointer
1 1 1
(12) Port P5 direction register
000B16
0016
Output pointer
1 1 1
(13) Port P6
000C16
0016
(42) Real time port control register 3
002E16
0016
(14) Port P6 direction register
000D16
0016
(43) Timer A (low-order)
002F16
FF16
(15) Port P7
000E16
0016
(44) Timer A (high-order)
003016
FF16
(16) Port P7 direction register
000F16
0016
(45) Timer B (low-order)
003116
FF16
(17) Port P8
001016
0016
(46) Timer B (high-order)
003216
FF16
(18) Port P8 direction register
001116
0016
(47) D-A control register
003316
0016
(19) Timer XY control register
001416 0 0 0 0 0 0 1 1
(48) A-D control register
003416 0 0 0 1 0 0 0 0
(20) Port P2P3 control register
001516 * 0 0 0 0 0 0 0
(49) D-A1 conversion register
003616
0016
(21) Pull-up control register
001616
(50) D-A2 conversion register
003716
0016
(22) Watchdog timer control register
001716 0 0 1 1 1 1 1 1
(51) D-A3 conversion register
003816
0016
(23) Serial I/O1 status register
001916 1 0 0 0 0 0 0 0
(52) D-A4 conversion register
003916
0016
(24) Serial I/O1 control register
001A16
(53) Interrupt edge selection register
003A16
0016
(25) UART control register
001B16 1 1 1 0 0 0 0 0
(54) CPU mode register
003B16 0 1 0 0 1 0 * 0
(26) Serial I/O2 control register 1
001D16
(55) Interrupt request register 1
003C16
0016
(27) Serial I/O2 control register 2
001E16 0 0 0 0 0 1 1 1
(56) Interrupt request register 2
003D16
0016
(28) Timer X (low-order)
002016
FF16
(57) Interrupt control register 1
003E16
0016
(29) Timer X (high-order)
002116
FF16
(58) Interrupt control register 2
003F16
0016
(30) Timer Y (low-order)
002216
FF16
(59) Processor status register
(31) Timer Y (high-order)
002316
FF16
(60) Program counter
(32) Timer 1
002416
FF16
(33) Timer 2
002516
0116
0016
0016
0016
0 0 0 0
002D16 1
0 0 0 0
(PS) ✕ ✕ ✕ ✕ ✕ 1 ✕ ✕
(PCH)
FFFD16 contents
(PCL)
FFFC16 contents
* The initial values depend on level of port CNVSS.
X: Not fixed
Since the initial values for other than above mentioned registers and RAM contents are indefinite at reset, they must be set.
Fig. 54. Internal status at reset
49
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Clock Generating Circuit
The 3807 group has two built-in oscillation circuits. An oscillation
circuit can be formed by connecting a resonator between XIN and
XOUT (XCIN and X COUT). Use the circuit constants in accordance with
the resonator manufacturer's recommended values. No
external resistor is needed between XIN and XOUT since a feed-back
resistor exists on-chip. However, an external feed-back resistor is
needed between X CIN and X COUT.
Immediately after poweron, only the X IN oscillation circuit starts
oscillating, and XCIN and XCOUT pins function as I/O ports.
●Frequency control
(1) Middle-speed mode
The internal clock φ is the frequency of XIN divided by 8. After reset,
this mode is selected.
("0") before executing the STP instruction. Oscillator restarts when
an external interrupt is received, but the internal clock φ is not supplied to the CPU (remains at "H") until timer 2 underflows. This allows time for the clock circuit oscillation to stabilize. The internal clock
φ is supplied for the first time, when timer 2 underflows. Therefore
make sure not to set the timer 2/INT3 interrupt request bit to "1" before the STP instruction stops the oscillator. When the
______
oscillator is restarted by reset apply "L" level to port RESET until the
oscillation is stable since a wait time will not be generated.
(2) Wait mode
If the WIT instruction is executed, the internal clock φ stops at an "H"
level. The states of XIN and XCIN are the same as the state before
executing the WIT instruction. The internal clock restarts at reset or
when an interrupt is received. Since the oscillator does not stop, normal operation can be started immediately after the clock is restarted.
(2) High-speed mode
The internal clock φ is half the frequency of XIN.
(3) Low-speed mode
The internal clock φ is half the frequency of XCIN.
■Note
If you switch the mode between middle/high-speed and low-speed,
stabilize both XIN and XCIN oscillations. The sufficient time is required
for the sub clock to stabilize, especially immediately after poweron
and at returning from stop mode. When switching the mode between
middle/high-speed and low-speed, set the frequency on condition
that f(XIN) > 3f(XCIN).
(4) Low power consumption mode
The low power consumption operation can be realized by stopping
the main clock XIN in low-speed mode. To stop the main clock, set bit
5 of the CPU mode register to "1." When the main clock XIN is restarted (by setting the main clock stop bit to "0"), set enough time for
oscillation to stabilize.
By clearing furthermore the XCOUT drivability selection bit (b3) of CPU
mode register to "0", low power consumption operation of less than
55 µA (VCC=3 V, X CIN=32 kHz) can be realized by reducing the
drivability between XCIN and XCOUT. At reset or during STP instruction execution this bit is set to "1" and a reduced drivability that has
an easy oscillation start is set. The sub-clock XCIN-XCOUT oscillating
circuit can not directly input clocks that are generated externally. Accordingly, make sure to cause an external resonator to oscillate.
●Oscillation control
(1) Stop mode
If the STP instruction is executed, the internal clock φ stops at an "H"
level, and XIN and XCIN oscillators stop. Timer 1 is set to "FF16" and
timer 2 is set to "0116 ."
Either X IN or XCIN divided by 16 is input to timer 1 as count source,
and the output of timer 1 is connected to timer 2. The bits of the timer
123 mode register except timer 3 count source selection bit (b4) are
cleared to "0". Set the timer 2/INT3 interrupt source bit to "1" and
timer 1/INT2 as well as timer 2/INT3 interrupt enable bit to disabled
50
XCIN
XCOUT
Rf
CCIN
XIN
XOUT
Rd
CCOUT
CIN
COUT
Fig. 55. Ceramic resonator circuit
XCIN
XCOUT
Rf
CCIN
XIN
Rd
XOUT
open
External oscillation circuit
CCOUT
VCC
VSS
Fig. 56. External clock input circuit
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
XCOUT
XCIN
"0"
"1"
Port XC
switch bit
Timer 1 count source
selection bits
XOUT
XIN
Main clock division ratio
selection bits (note)
"10"
"01"
Timer 1
Low-speed mode
1/2
Timer 2 count source
selection bit
1/4
1/2
"0"
Timer 2
"00"
High-speed or
middle-speed
mode
"1"
Main clock division ratio
selection bits (note)
Middle-speed mode
Timing φ (internal clock)
High-speed or
low-speed mode
Main clock stop bit
Q
S
R
S Q
STP instruction
WIT instruction
R
Q S
R
STP instruction
Reset
Interrupt disable flag l
Interrupt request
Note: Either high-speed, middle-speed or low-speed mode is selected by bits 7 and 6 of CPU mode register.
When low-speed mode is selected, set port Xc switch bit (b4) to “1”.
Fig. 57. System clock generating circuit block diagram (Single-chip mode)
51
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Reset
"0
"
"0
"
"
High-speed mode
(f( ) =4MHz)
CM6
"1 "
"1
"0 "
CM
"0 4
"
CM
"1 6
"1
"
"
CM4
"1 "
CM "
"1 6
CM "
"1
"0
C M 7=0
C M 6=0
C M 5=0(8MHz oscillating)
C M 4=0(32kHz stopped)
"0 "
"0 "
C M7=0
C M6=0
C M5=0(8MHz oscillating)
C M4=1(32kHz oscillating)
CM
"0 7
CM "
"
6
"1
"0
"
"0 "
"0 "
CM4
"1 "
4
Middle-speed mode
(f( ) =1MHz)
C M 7=0
C M 6=1
C M 5=0(8MHz oscillating)
C M 4=1(32kHz oscillating)
High-speed mode
(f( ) =4MHz)
CM6
"1 "
"
CM7
"1 "
Middle-speed mode
(f( ) =1 MHz)
C M 7=0
C M 6=1
C M 5=0(8MHz oscillating)
C M 4=0(32kHz stopped)
Low-speed mode
(f( ) =16 kHz)
CM5
"1 "
"0 "
C M 7=1
C M 6=0
C M 5=0(8MHz oscillating)
C M 4=1(32kHz oscillating)
Low-speed mode
(f( ) =16 kHz)
C M 7=1
C M 6=0
C M 5=1(8MHz stopped)
C M 4=1(32kHz oscillating)
b7
b4
CPU mode register
(CPUM : address 003B16)
CM4 : Port Xc switch bit
0 : I/O port function (stop oscillating)
1 : XCIN-XCOUT oscillating function
CM5 : Main clock (XIN- XOUT ) stop bit
0 : Operating
1 : Stopped
CM7,CM 6 : Main clock division ratio selection bit
b7 b6
0
0 : = f(XIN)/2 ( High-speed mode)
0
1 : = f(XIN)/8 (Middle-speed mode)
1
0 : = f(XCIN)/2 (Low-speed mode)
1
1 : Not available
Note 1:Switch the mode by the allows shown between the mode blocks. (Do not switch between the mode directly without an allow . )
2:The all modes can be switched to the stop mode or the wait mode and return to the source mode when the stop mode or the wait
mode is ended.
3:Timer operates in the wait mode.
4:When the stop mode is ended, a delay of approximately 1 ms occurs by Timer 1 and Timer 2 in middle/high-speen mode.
5:When the stop mode is ended, a delay of approximately 0.25 s occurs by Timer 1 and Timer 2 in low-speed mode.
6:Wait until oscillation stabilizes after oscillating the main clock XIN before the switching from the low-speed mode to middle/highspeed mode.
7:The example assumes that 8 MHz is being applied to the XIN pin and 32 kHz to the XCIN pin. φ indicates the internal clock.
Fig. 58. State transitions of system clock
52
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Processor Mode
Single-chip mode, memory expansion mode, and microprocessor
mode can be selected by changing the contents of the processor
mode bits (CM0 and CM1 : b1 and b0 of address 003B16). In memory
expansion mode and microprocessor mode, memory can be expanded externally through ports P0 to P3. In these modes, ports P0
to P3 lose their I/O port functions and become bus pins.
000016
000016
000816
Port P3
P3 0 and P31 function only as output pins
(except that
the port latch cannot be read).
____
P32 is the ONW input pin.
P33 is the RESTOUT output pin. (Note)
P34 is the φ output pin.
P35 is the SYNC output pin.
___
___
P36 is the WR output pin, and P37 is the RD output
pin.
Note : If CNV SS is connected to VSS , the microcomputer goes to
single-chip mode after a reset, so this pin cannot be used as
the RESETOUT output pin.
SFR area
004016
004016
internal RAM
reserved area
Table. 7. Port functions in memory expansion mode and microprocessor mode
Port Name
Function
Port P0
Outputs 8-bits low-order byte of address.
Port P1
Outputs 8-bits high-order byte of address.
Port P2
Operates as I/O pins for data D 7 to D0
(including instruction code)
000816
SFR area
internal RAM
reserved area
084016
084016
*
YYYY16
internal ROM
FFFF16
FFFF16
Memory expansion mode
Microprocessor mode
The shaded area are external memory area.
*: YYYY16 indicates the first address of internal ROM.
Fig. 59. Memory maps in various processor modes
(1) Single-chip mode
Select this mode by resetting the microcomputer with CNV SS
connected to VSS.
(2) Memory expansion mode
Select this mode by setting the processor mode bits (b1, b0) to "01"
in software with CNV SS connected to VSS . This mode enables
external memory expansion while maintaining the validity of the
internal ROM. However, some I/O devices will not support the memory
expansion mode. Internal ROM will take precedence over external
memory if addresses conflict.
(3) Microprocessor mode
Select this mode by resetting the microcomputer with CNV SS connected to VCC, or by setting the processor mode bits to "10" in software with CNVSS connected to VSS. In microprocessor mode, the
internal ROM is no longer valid and external memory must be used.
b7
b0
CPU mode register
(CPUM : address 003B16)
Processor mode bits (CM1, CM0)
b1 b0
0
0
1
1
0: Single-chip mode
1: Memory expansion mode
0: Microprocessor mode
1: Not available
Stack page selection bit
0: 0 page
1: 1 page
Fig. 60. Structure of CPU mode register
53
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Bus control at memory expansion
_____
The 3807 group has a built-in ONW function to facilitate access to
external (expanded) memory and I/O devices in memory expansion
mode or microprocessor mode.
_____
If an "L" level signal is input to port P32/ONW when the CPU is in a
read or write state, the corresponding read or write cycle
is___
extended
___
by one cycle of φ. During this extended period, the RD or WR signal
remains at "L". This extension function is valid only for writing to and
reading from addresses 000016 to 000716 and 084016 to FFFF16, and
only read and write cycles are extended.
Read cycle
Dummy cycle Write cycle
Read cycle Dummy cycle
Write cycle
φ
AD15—AD0
RD
WR
ONW
*
*
*
* Period during which ONW input signal is received
During this period, the ONW signal must be fixed at either "H" or "L". At all other times, the input level of the ONW
signal has no affect on operations. The bus cycles is not extended for an address in the area 000816 to 083F16,
regardless of whether the ONW signal is received.
_____
Fig. 61. ONW function timing
54
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
NOTES ON PROGRAMMING
Processor Status Register
The contents of the processor status register (PS) after a reset are
undefined, except for the interrupt disable flag (I) which is "1." After a
reset, initialize flags which affect program execution. In particular, it
is essential to initialize the index X mode (T) and the decimal mode
(D) flags because of their effect on calculations.
Interrupts
The contents of the interrupt request bits do not change immediately
after they have been written. After writing to an interrupt request register, execute at least one instruction before performing a BBC or
BBS instruction.
Decimal Calculations
•To calculate in decimal notation, set the decimal mode flag (D) to
"1", then execute an ADC or SBC instruction. Only the ADC and
SBC instructions yield proper decimal results. After executing an
ADC or SBC instruction, execute at least one instruction before executing a SEC, CLC, or CLD instruction.
•In decimal mode, the values of the negative (N), overflow (V), and
zero (Z) flags are invalid.
Timers
If a value n (between 0 and 255) is written to a timer latch, the frequency division ratio is 1/(n+1).
Multiplication and Division Instructions
A-D Converter
The comparator uses internal capacitors whose charge will be lost if
the clock frequency is too low.
Therefore, make sure that
f(XIN) is at least on 500 kHz during an A-D
_____
conversion. (When the ONW pin has been set to "L", the A-D conversion will take twice as long to match the longer bus cycle, and so
f(XIN) must be at least 1 MHz.)
Do not execute the STP or WIT instruction during an A-D conversion.
D-A Converter
The accuracy of the D-A converter becomes rapidly poor under the
VCC = 4.0 V or less condition; a supply voltage of VCC ≥ 4.0 V is
recommended. When a D-A converter is not used, set all values of
D-Ai conversion registers (i=1 to 4) to "0016 ."
Instruction Execution Time
The instruction execution time is obtained by multiplying the frequency
of the internal clock φ by the number of cycles needed to execute an
instruction.
The number of cycles required to execute an instruction is shown in
the list of machine instructions.
The frequency of the internal clock φ is half of the X IN frequency in
high-speed mode.
_____
When the ONW function is used in modes other than single-chip
mode, the frequency of the internal clock φ may be one fourth of the
XIN frequency.
•The index X mode (T) and the decimal mode (D) flags do not affect
the MUL and DIV instruction.
•The execution of these instructions does not change the contents of
the processor status register.
Ports
The contents of the port direction registers cannot be read. The
following cannot be used:
•The data transfer instruction (LDA, etc.)
•The operation instruction when the index X mode flag (T) is "1"
•The addressing mode which uses the value of a direction register
as an index
•The bit-test instruction (BBC or BBS, etc.) to a direction register
•The read-modify-write instructions (ROR, CLB, or SEB, etc.) to a
direction register.
Use instructions such as LDM and STA, etc., to set the port direction
registers.
Serial I/O
In clock synchronous serial I/O, if the receive side is using an
external clock and it is to output the S RDY1 signal, set the transmit
enable bit, the receive enable bit, and the SRDY1 output enable bit to
"1."
Serial I/O1 continues to output the final bit from the T XD pin after
transmission is completed. S OUT2 pin for serial I/O2 goes to high impedance after transfer is completed.
When in serial I/O1 (clock-synchronous mode) or in serial I/O2 an
external clock is used as synchronous clock, write transmission data
to both the transmit buffer register and serial I/O2 register, during
transfer clock is “H.”
55
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
NOTES ON USAGE
Handling of Source Pins
In order to avoid a latch-up occurrence, connect a capacitor suitable
for high frequencies as bypass capacitor between power source pin
(VCC pin) and GND pin (Vss pin) and between power source pin (VCC
pin) and analog power source input pin (AVSS pin). Besides, connect
the capacitor to as close as possible. For bypass capacitor which
should not be located too far from the pins to be connected, a ceramic capacitor of 0.01 µF—0.1 µF is recommended.
P34 clock output function
In the case of using an I/O port P34 as a clock output function, note
the following : when an output clock frequency is changed during
outputting a clock, the port may feed a noise having a shorter pulse
width than the standard at the switch timing. Besides, it also may
happen at the timing for switching the low-speed mode to the middle/
high-speed mode.
Timer X and timer Y
In the pulse period measurement mode or the pulse width measurement mode for timers X and Y, set the "L" or "H" pulse width of input
signal from CNTR0/CNTR1 pin to 2 cycles or more of a timer count
source.
EPROM version/One Time PROM version
The CNVSS pin is connected to the internal memory circuit block by a
low-ohmic resistance, since it has the multiplexed function to be a
programmable power source pin (VPP pin) as well.
To improve the noise reduction, connect a track between CNVSS pin
and VSS pin or VCC pin with 1 to 10 kΩ resistance.
The mask ROM version track of port CNVSS has no operational interference even if it is connected via a resistor.
56
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DATA REQUIRED FOR MASK ORDERS
ROM PROGRAMMING METHOD
The following are necessary when ordering a mask ROM production:
(1) Mask ROM Order Confirmation Form
(2) Mark Specification Form
(3) Data to be written to ROM, in EPROM form (three identical copies)
The built-in PROM of the blank One Time PROM version and built-in
EPROM version can be read or programmed with a general purpose
PROM programmer using a special programming adapter. Set the
address of PROM programmer in the user ROM area.
Table. 8. Special programming adapter
Package
80P6N-A
80D0
Name of Programming Adapter
PCA4738F-80A
PCA4738L-80A
The PROM of the blank One Time PROM version is not tested or
screened in the assembly process and following processes. To ensure proper operation after programming, the procedure shown in
Figure 64 is recommended to verify programming.
Programming with PROM
programmer
Screening (Caution)
(150°C for 40 hours)
Verification with
PROM programmer
Functional check in
target device
Caution : The screening temperature is far higher
than the storage temperature. Never
expose to 150 °C exceeding 100 hours.
Fig. 62. Programming and testing of One Time PROM version
57
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Table 9 Absolute maximum ratings
Symbol
Parameter
Conditions
Ratings
Unit
VCC
Power source voltage
–0.3 to 7.0
V
CMPVCC
Analog comparator power source voltage
–0.3 to 7.0
V
VI
Input voltage
–0.3 to VCC +0.3
V
VI
Input voltage
RESET, XIN
–0.3 to VCC +0.3
V
VI
Input voltage
CNVSS (ROM version)
–0.3 to 7
V
VI
Input voltage
CNVSS (PROM version)
VI
In-phase input voltage
CMPIN, CMPREF
VID
Differential input voltage
VO
P00–P07, P1 0–P17 , P20–P2 7,
P30–P37, P4 0–P47, P5 0–P57 ,
P60–P65, P7 0–P77, P8 0–P87 ,
ADVREF
____________
All voltages are
based on VSS.
Output transistors
are cut off.
–0.3 to 13
V
–0.3 to CMPVCC +0.3
V
|CMPIN–CMPREF|
CMPVCC
V
Output voltage
P00–P07, P1 0–P17 , P20–P2 7,
P30–P37, P4 0–P47, P5 0–P57 ,
P60–P62, P6 5, P70–P7 7,
P80–P87, XOUT
–0.3 to VCC +0.3
V
VO
Output voltage
CMP OUT
–0.3 to CMPVCC +0.3
V
Pd
Power dissipation
Topr
Operating temperature
Tstg
Storage temperature
58
Ta = 25°C
500
mW
–20 to 85
°C
–40 to 125
°C
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
RECOMMENDED OPERATING CONDITIONS
Table 10 Recommended operating conditions (1) (Vcc = 2.7 to 5.5 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
VCC
Limits
Parameter
Power source voltage
f(XIN)
4.1MHz
f(XIN) = 8MHz
Typ.
Max.
2.7
5.0
5.5
V
4.0
5.0
5.5
V
VSS
Power source voltage
0
ADVREF
A-D comparator reference voltage
2.0
DAVREF
D-A comparator reference voltage
2.7
CMPVCC
Analog comparator power source voltage
AVSS
Analog power source voltage
VIA
A-D comparator input voltage
AN0—AN12
VIH
“H” input voltage
P00—P07, P1 0—P17, P30, P3 1,
P33—P37, P4 0—P47, P50—P57,
P60—P65, P7 0—P77, P80—P87
VIH
“H” input voltage (CMOS input level selected) P20—P27, P32
VIH
“H” input voltage (TTL input level selected)
VIH
“H” input voltage
RESET, XIN, CNVSS
VIL
“L” input voltage
P00—P07, P1 0—P17, P30, P3 1,
P33—P37, P4 0—P47, P50—P57,
P60—P65, P7 0—P77, P80—P87
VIL
VIL
VIL
“L” input voltage
VIL
“L” input voltage
V
VCC
V
VCC
V
VCC
V
0
P20—P27, P3 2 (Note)
Unit
Min.
V
AVSS
VCC
V
0.8VCC
VCC
V
0.8VCC
VCC
V
2.0
VCC
V
0.8VCC
VCC
V
0
0.2VCC
V
“L” input voltage (CMOS input level selected) P20—P27, P32
0
0.2VCC
V
“L” input voltage (TTL input level selected)
0
0.8
V
RESET, CNVSS
0
0.2VCC
V
XIN
0
0.16VCC
V
______
P20—P27, P3 2 (Note)
______
Note: When Vcc is 4.0 to 5.5 V.
Table 11 Recommended operating conditions (2) (Vcc = 2.7 to 5.5 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Limits
Min.
Typ.
Max.
Unit
∑I OH(peak)
“H” total peak output current (Note)
P0 0–P07, P1 0–P17 , P20–P2 7,
P30–P37, P8 0–P87
–80
mA
∑I OH(peak)
“H” total peak output current (Note)
P4 0–P47, P5 0–P57 , P60–P6 2, P65,
CMPOUT, P70–P7 7
–80
mA
∑I OL(peak)
“L” total peak output current (Note)
P0 0–P07, P1 0–P17 , P20–P2 3,
P30–P37, P8 0–P87
80
mA
∑I OL(peak)
“L” total peak output current (Note)
P24–P27
in single chip mode
80
mA
in memory expansion mode and
microprocessor mode
80
mA
80
mA
∑I OL(peak)
“L” total peak output current (Note)
P4 0–P47, P5 0–P57 , P60–P6 2, P65,
CMPOUT, P70–P7 7
∑I OH(avg)
“H” total average output current (Note)
P00–P07, P1 0–P17 , P20–P2 7,
P30–P37, P8 0–P87
–40
mA
∑I OH(avg)
“H” total average output current (Note)
P40–P47, P5 0–P57 , P60–P6 2, P65,
CMPOUT, P70–P7 7
–40
mA
∑I OL(avg)
“L” total average output current (Note)
P0 0–P07, P1 0–P17 , P20–P2 3,
P30–P37, P8 0–P87
40
mA
∑I OL(avg)
“L” total average output current (Note)
P24–P27
in single chip mode
40
mA
in memory expansion mode and
microprocessor mode
40
mA
P4 0–P47, P5 0–P57 , P60–P6 2, P65,
CMPOUT, P70–P7 7
40
mA
∑I OL(avg)
“L” total average output current (Note)
Note: The total output current is the sum of all the currents flowing through all the applicable ports. The total average current is an average
value measured over 100ms. The total peak current is the peak value of all the currents.
59
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 12 Recommended operating conditions (3) (Vcc = 2.7 to 5.5 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Limits
Min.
Typ.
Max.
Unit
IOH(peak)
“H” peak output current (Note 1)
P00 –P07, P1 0–P17, P2 0–P27 ,
P30–P3 7, P4 0–P47, P5 0–P57,
P60–P6 2, P65 , CMPOUT, P7 0–P77,
P80–P8 7
–10
mA
IOL(peak)
“L” peak output current (Note 1)
P00 –P07, P1 0–P17, P2 0–P23 ,
P30–P3 7, P4 0–P47, P5 0–P57,
P60–P6 2, P65 , CMPOUT, P7 0–P77,
P80–P8 7
10
mA
IOL(peak)
“L” peak output current (Note 1)
P24–P27
in single chip mode
20
mA
in memory expansion mode and
microprocessor mode
10
mA
IOH(avg)
“H” average output current (Note 2)
P00 –P07, P1 0–P17, P2 0–P27 ,
P30–P3 7, P4 0–P47, P5 0–P57,
P60–P6 2, P65 , CMPOUT, P7 0–P77,
P80–P8 7
–5
mA
IOL(avg)
“L” average output current (Note 2)
P00 –P07, P1 0–P17, P2 0–P23 ,
P30–P3 7, P4 0–P47, P5 0–P57,
P60–P6 2, P65 , CMPOUT, P7 0–P77,
P80–P8 7
5
mA
IOL(avg)
“L” average output current (Note 2)
P24–P27
in single chip mode
15
mA
in memory expansion mode and
microprocessor mode
5
mA
Main clock input oscillation
frequency (Note 3)
High-speed mode
4.0V VCC 5.5V
8
MHz
High-speed mode
2.7V VCC 4.0V
3VCC–4
MHz
Middle-speed mode
4.0V VCC 5.5V
8
MHz
Middle-speed mode (Note 5)
2.7V VCC 4.0V
8
MHz
Middle-speed mode (Note 5)
2.7V VCC 4.0V
3VCC–4
MHz
50
kHz
f(XIN)
f(XCIN)
Note1:
2:
3:
4:
Sub-clock input oscillation frequency (Note 3, 4)
32.768
The peak output current is the peak current flowing in each port.
The average output current IOL (avg), IOH (avg) in an average value measured over 100ms.
When the oscillation frequency has a duty cyde of 50%.
When using the microcomputer in low-speed mode, set the sub-clock input oscillation frequency on condition that f(XCIN) f(X IN)/
3.
5: When using the timer X/Y, timer A/B (real time output port), timer 1/2/3, serial I/O1, serial I/O2, and A-D converter, set the main
clock input oscillation frequency to the max. 3 Vcc–4 (MHz).
60
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
ELECTRICAL CHARACTERISTICS
Table 13 Electrical characteristics (1) (Vcc = 2.7 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 ° C, unless otherwise noted)
Symbol
VOH
VOL
VT+ –VT–
Parameter
Test conditions
Limits
Min.
Typ.
Max.
Unit
“H” output voltage P00–P07, P1 0–P17, P2 0–P27 ,
P30–P37, P4 0–P47, P5 0–P57 ,
P60–P62, P6 5, P70–P7 7,
P80–P87, CMP OUT (Note 1)
IOH = –10mA
VCC = 4.0 to 5.5V
VCC–2.0
V
IOH = –1.0mA
VCC = 2.7 to 5.5V
VCC–1.0
V
“L” output voltage P00–P07, P1 0–P17, P2 0–P27 ,
P30–P37, P4 0–P47, P5 0–P57 ,
P60–P62, P6 5, P70–P7 7,
P80–P87, CMP OUT
IOL = 10mA
VCC = 4.0 to 5.5V
2.0
V
IOL = 1.6mA
VCC = 2.7 to 5.5V
0.4
V
Hysteresis
P42, P43, P5 1–P55, P7 3 (Note 2),
CNTR0, CNTR 1, INT0–INT4, ADT
0.4
V
VT+ –VT–
Hysteresis
RXD, SCLK1, SIN2, SCLK2
0.5
V
VT+ –VT–
Hysteresis
RESET
IIH
“H” input current
P00–P07, P1 0–P17, P2 0–P27 ,
P30–P37, P4 0–P47, P5 0–P57 ,
P60–P65, P7 0–P77, P8 0–P8 7
IIH
“H” input current
RESET, CNVSS
VI = VCC
IIH
“H” input current
XIN
VI = VCC
IIL
“L” input current
P00–P07, P1 0–P17, P2 0–P27 ,
P30–P37, P4 0–P47, P5 0–P57 ,
P60–P65, P7 0–P77, P8 0–P8 7
VI = VSS
(Pin floating. Pull-up
transistors “off”)
–5.0
µA
IIL
“L” input current
RESET, CNVSS
VI = VSS
–5.0
µA
IIL
“L” input current
XIN
VI = VSS
IIL
“L” input current
P00–P07, P1 0–P17, P2 0–P2 7
Pull-up transistors “on”
VI = VSS
VRAM
RAM hold voltage
____________
0.5
VI = VCC
(Pin floating. Pull-up
transistors “off”)
V
5.0
µA
5.0
µA
____________
µA
4
____________
When clock stopped
2.0
–4
µA
–0.2
mA
5.5
V
Note1: P45 is measured when the P45/TXD P-channel output disable bit of the UART control register (bit 4 of address 001B16) is “0”.
P71, and P12 are measured when the P71/SOUT2 and P7 2/SCLK2 P-channel output disable bit of the serial I/O2 control register 1
(bit 7 of address 001D 16).
2: P73 is measured when the AD external trigger valid bit of the A–D control register (bit 6 of address 003416) is “1”.
61
MITSUBISHI MICROCOMPUTERS
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 14 Electrical characteristics (2) (Vcc = 2.7 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 ° C, unless otherwise noted)
Symbol
ICC
CMPICC
62
Parameter
Power source current
Analog comparator
Power source current
Limits
Test conditions
Min.
Unit
Typ.
Max.
High-speed mode
f(X IN) = 8MHz
f(X CIN) = 32.768kHz
Output transistors “off”
6.8
13
High-speed mode
f(X IN) = 8MHz (in WIT state)
f(X CIN) = 32.768kHz
Output transistors “off”
1.6
Low-speed mode
f(X IN) = stopped
f(X CIN) = 32.768kHz
Low-power dissipation mode (CM 3 = 0)
Output transistors “off”
60
200
µA
Low-speed mode
f(X IN) = stopped
f(X CIN) = 32.768kHz (in WIT state)
Low-power dissipation mode (CM 3 = 0)
Output transistors “off”
20
40
µA
Low-speed mode (V CC = 3V)
f(X IN) = stopped
f(X CIN) = 32.768kHz
Low-power dissipation mode (CM 3 = 0)
Output transistors “off”
20
55
µA
Low-speed mode (V CC = 3V)
f(X IN) = stopped
f(X CIN) = 32.768kHz (in WIT state)
Low-power dissipation mode (CM 3 = 0)
Output transistors “off”
5.0
10.0
µA
Middle-speed mode
f(X IN) = 8MHz
f(X CIN) = stopped
Output transistors “off”
4.0
7.0
mA
Middle-speed mode
f(X IN) = 8MHz (in WIT state)
f(X CIN) = stopped
Output transistors “off”
1.5
mA
Increment when A-D conversion is executed
f(X IN) = 8MHz
800
µA
All oscillation stopped (in STP state)
Output transistors “off”
0.1
Ta = 25°C
Ta = 85°C
200
mA
mA
1.0
µA
10
µA
500
µA
MITSUBISHI MICROCOMPUTERS
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
A-D CONVERTER CHARACTERISTICS
Table 15 A-D converter characteristics
(Vcc = 2.7 to 5.5 V, Vss = AVss = 0 V, ADV REF = 2.0 V to Vcc, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Test conditions
—
Resolution
—
Absolute accuracy (excluding quantization error)
tCONV
Conversion time
RLADDER
Ladder resistor
IADVREF
Reference power
source input current
II(AD)
ADVREF
“ on”
ADVREF
“ off”
Min.
Limits
Typ.
VCC = ADVREF = 5.0V
ADVREF = 5.0V
Max.
Unit
8
Bits
±2
LSB
50
tc(φ)
12
35
100
kΩ
50
150
200
µA
5
µA
5.0
µA
A-D port input current
D-A CONVERTER CHARACTERISTICS
Table 16 D-A converter characteristics
(Vcc = 2.7 to 5.5 V, Vss = AVss = 0 V, DAV REF = 2.7 V to Vcc, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
—
Resolution
—
Absolute accuracy
Test conditions
Min.
Limits
Typ.
Max.
Unit
8
Bits
VCC = 4.0 to 5.5V
1.0
%
VCC = 2.7 to 4.0V
2.5
%
3
µs
tsu
Setting time
Ro
Output resistor
IDAVREF
Reference power source input current (Note)
1
2.5
4
kΩ
3.2
mA
Note: Using one D-A converter, with the value in the D-A conversion register of the other D-A converter being “00 16”.
ANALOG COMPARATOR CHARACTERISTICS
Table 17 Analog comparator characteristics
(Vcc = 2.7 to 5.5 V, Vss = AVss = 0 V, CMPVcc = 2.7 V to Vcc, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Test conditions
Limits
Min.
CMPVCC = 5.0V
CMPREF = 2.5V, Rs = 0Ω
Unit
Typ.
Max.
3
50
mV
VIO
Input offset voltage
IB
Input bias current
5
µA
IIO
Input offset current
5
µA
VICM
In-phase input voltage range
CMPVCC
–0.5
V
AV
Voltage gain
tPD
Response time
2500
ns
1.2
∞
CMPVCC = 5.0V
CMPREF = 2.5V
60
63
MITSUBISHI MICROCOMPUTERS
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TIMING REQUIREMENTS
Table 18 Timing requirements (1) (Vcc = 4.0 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Limits
Min.
Typ.
Max.
Unit
____________
tW(RESET)
Reset input “L” pulse width
2
s
tC(XIN)
External clock input cycle time
125
ns
tWH(XIN)
External clock input “H” pulse width
50
ns
tWL(XIN)
External clock input “L” pulse width
50
ns
tC(CNTR)
CNTR 0, CNTR 1 input cycle time
200
ns
tWH(CNTR)
CNTR 0, CNTR 1 input “H” pulse width
80
ns
tWL(CNTR)
CNTR 0, CNTR 1 input “L” pulse width
80
ns
tWH(INT)
INT0 to INT4 input “H” pulse width
80
ns
tWL(INT)
INT0 to INT4 input “L” pulse width
80
ns
tC(SCLK1)
Serial I/O1 clock input cycle time (Note)
800
ns
tWH(SCLK1)
Serial I/O1 clock input “H” pulse width (Note)
370
ns
tWL(SCLK1)
Serial I/O1 clock input “L” pulse width (Note)
370
ns
tsu (RXD–SCLK1)
Serial I/O1 clock input set up time
220
ns
th(SCLK1–R XD)
Serial I/O1 clock input hold time
100
ns
tC(SCLK2)
Serial I/O2 clock input cycle time
1000
ns
tWH(SCLK2)
Serial I/O2 clock input “H” pulse width
400
ns
tWL(SCLK2)
Serial I/O2 clock input “L” pulse width
400
ns
tsu (SIN2–SCLK2)
Serial I/O2 clock input set up time
200
ns
200
ns
th(SCLK2–SIN2)
Serial I/O2 clock input hold time
Note: When bit 6 of address 001A16 is “1” (clock synchronous).
Divide this value by four when bit 6 of address 001A16 is “0” (UART).
Table 19 Timing requirements (2) (Vcc = 2.7 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Limits
Min.
____________
Typ.
Max.
Unit
2
µs
External clock input cycle time
243
ns
tWH(XIN)
External clock input “H” pulse width
100
ns
tWL(XIN)
External clock input “L” pulse width
100
ns
tC(CNTR)
CNTR 0, CNTR 1 input cycle time
500
ns
tWH(CNTR)
CNTR 0, CNTR 1 input “H” pulse width
230
ns
tWL(CNTR)
CNTR 0, CNTR 1 input “L” pulse width
230
ns
tWH(INT)
INT0 to INT4 input “H” pulse width
230
ns
tWL(INT)
INT0 to INT4 input “L” pulse width
230
ns
2000
ns
tW(RESET)
tC(XIN)
Reset input “L” pulse width
tC(SCLK1)
Serial I/O1 clock input cycle time (Note)
tWH(SCLK1)
Serial I/O1 clock input “H” pulse width (Note)
950
ns
tWL(SCLK1)
Serial I/O1 clock input “L” pulse width (Note)
950
ns
tsu (RXD–SCLK1)
Serial I/O1 clock input set up time
400
ns
th(SCLK1–R XD)
Serial I/O1 clock input hold time
200
ns
tC(SCLK2)
Serial I/O2 clock input cycle time
2000
ns
tWH(SCLK2)
Serial I/O2 clock input “H” pulse width
950
ns
tWL(SCLK2)
Serial I/O2 clock input “L” pulse width
950
ns
Serial I/O2 clock input set up time
400
ns
300
ns
tsu (SIN2–SCLK2)
th(SCLK2–SIN2)
Serial I/O2 clock input hold time
Note: When bit 6 of address 001A16 is “1” (clock synchronous).
Divide this value by four when bit 6 of address 001A16 is “0” (UART).
64
MITSUBISHI MICROCOMPUTERS
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SWITCHING CHARACTERISTICS
Table 20 Switching characteristics (1) (Vcc = 4.0 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Test conditions
Fig. 3.1.1
Limits
Min.
Typ.
Max.
Unit
tWH (SCLK1)
Serial I/O1 clock output “H” pulse width
tWL(SCLK1)
Serial I/O1 clock output “L” pulse width
tC(SCLK1)/2–30
ns
tC(SCLK1)/2–30
ns
td(SCLK1–TXD)
Serial I/O1 output delay time (Note 1)
tv (SCLK1–TXD)
Serial I/O1 output valid time (Note 1)
tr (SCLK1)
Serial I/O1 clock output rising time
30
ns
tf(SCLK1)
Serial I/O1 clock output falling time
30
ns
tWH (SCLK2)
Serial I/O2 clock output “H” pulse width
tWL(SCLK2)
Serial I/O2 clock output “L” pulse width
td(SCLK2–SOUT2)
Serial I/O2 output delay time (Note 2)
tv (SCLK2–SOUT2)
Serial I/O2 output valid time (Note 2)
tf(SCLK2)
Serial I/O2 clock output falling time
tr (CMOS)
CMOS output rising time (Note 3)
tf(CMOS)
CMOS output falling time (Note 3)
140
ns
–30
Fig. 3.1.1
ns
t C(SCLK2)/2–160
ns
t C(SCLK2)/2–160
ns
200
ns
0
ns
Fig. 3.1.1
30
ns
10
30
ns
10
30
ns
Note 1: When the P4 5/TXD P-channel output disable bit of the UART control register (bit 4 of address 001B 16) is “0”.
2: When the P71/S OUT2, P72/SCLK2 P-channel output disable bit of the serial I/O2 control register1 (bit 7 of address 001D16) is “0”.
3: XOUT pin is excluded.
Table 21 Switching characteristics (2) (Vcc = 2.7 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Test conditions
Fig. 3.1.1
Limits
Min.
Typ.
Max.
Unit
tWH (SCLK1)
Serial I/O1 clock output “H” pulse width
tWL(SCLK1)
Serial I/O1 clock output “L” pulse width
tC(SCLK1)/2–50
ns
tC(SCLK1)/2–50
ns
td(SCLK1–TXD)
Serial I/O1 output delay time (Note 1)
tv (SCLK1–TXD)
Serial I/O1 output valid time (Note 1)
tr (SCLK1)
Serial I/O1 clock output rising time
50
ns
tf(SCLK1)
Serial I/O1 clock output falling time
50
ns
tWH (SCLK2)
Serial I/O2 clock output “H” pulse width
tWL(SCLK2)
Serial I/O2 clock output “L” pulse width
td(SCLK2–SOUT2)
Serial I/O2 output delay time (Note 2)
tv (SCLK2–SOUT2)
Serial I/O2 output valid time (Note 2)
tf(SCLK2)
Serial I/O2 clock output falling time
tr (CMOS)
CMOS output rising time (Note 3)
tf(CMOS)
CMOS output falling time (Note 3)
350
–30
Fig. 3.1.1
ns
t C(SCLK2)/2–240
ns
t C(SCLK2)/2–240
ns
400
0
Fig. 3.1.1
ns
ns
ns
50
ns
20
50
ns
20
50
ns
Note 1: When the P4 5/TXD P-channel output disable bit of the UART control register (bit 4 of address 001B 16) is “0”.
2: When the P7 1/SOUT2, P72/S CLK2 P-channel output disable bit of the serial I/O2 control register1 (bit 7 of address 001D16 ) is “0”.
3: XOUT pin is excluded.
65
MITSUBISHI MICROCOMPUTERS
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TIMING REQUIREMENTS IN MEMORY EXPANSION MODE AND MICROPROCESSOR MODE
Table 22 Timing requirements in memory expansion and microprocessor mode(1)
(Vcc = 4.0 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 °C, in high-speed mode, unless otherwise noted)
Symbol
Limits
Parameter
Min.
Typ.
Max.
Unit
_________
____
tsu(ONW–φ)
–20
ns
th(φ–ONW)
ONW input set up time
ONW input hold time
–20
ns
tsu(DB–φ)
Data bus set up time
50
ns
th(φ–DB)
Data bus hold time
0
ns
–20
ns
ONW input hold time
–20
ns
Data bus set up time
50
ns
Data bus hold time
0
ns
_________
____
____ __
____ __
tsu(ONW–RD), tsu(ONW–WR)
__ ____
__ ____
th(RD–ONW), th(WR–ONW)
__
tsu(DB–RD)
__
th(RD–DB)
________
ONW input set up time
_________
SWITCHING CHARACTERISTICS IN MEMORY EXPANSION MODE AND MICROPROCESSOR MODE
Table 23 Switching characteristics in memory expansion and microprocessor mode(1)
(Vcc = 4.0 to 5.5 V, Vss = 0 V, Ta = – 20 to 85 °C, in high-speed mode, unless otherwise noted)
Symbol
Parameter
Test conditions
Limits
Min.
Typ.
Max.
Unit
tc(φ)
φ
clock cycle time
tWH(φ)
φ
clock “H” pulse width
tC(XIN)–10
tWL( φ)
φ
clock “L” pulse width
tC(XIN)–10
td(φ–AH)
AD15 –AD8 delay time
16
35
ns
td(φ–AL)
AD7–AD 0 delay time
20
40
ns
tv(φ–AH)
AD15 –AD8 valid time
2
5
ns
tv(φ–AL)
AD7–AD 0 valid time
2
5
ns
td(φ–SYNC)
SYNC delay time
16
ns
tv(φ–SYNC)
SYNC valid time
5
ns
td(φ–DB)
Data bus delay time
tv(φ–DB)
Data bus valid time
__
__
__
tWL(RD), t WL(WR)
__
__
__
__
td(AL–RD), td(AL–WR)
__
__
__
__
tv(RD–AH), t v(WR–AH)
tv(RD–AL), tv(WR–AL)
__
td(WR–DB)
_____
____________
____________
tv(φ–RESETOUT)
ns
15
30
ns
tC(XIN)–10
ns
3tC (XIN)–10
ns
tC(XIN)–35
t C(XIN)–16
ns
AD7–AD 0 delay time
tC(XIN)–40
t C(XIN)–20
ns
AD15 –AD8 valid time
2
5
ns
AD7–AD 0 valid time
2
5
ns
15
30
10
ns
ns
_______________
RESETOUT output delay time
200
ns
100
ns
_______________
RESETOUT output valid time (Note)
0
Note: ____________
The RESETOUT output goes “H” in sync with the fall of the φ clock that is anywhere between about 8 cycle and 13 cycles after the
RESET input goes “H”.
66
ns
AD15 –AD8 delay time
Data bus valid time
td(RESET–RESETOUT)
ns
10
Data bus delay time
__
tv(WR–DB)
ns
___
RD pulse width, WR pulse width
(When one-wait is valid)
td(AH–RD), td(AH–WR)
2tC (XIN)
___
RD pulse width, WR pulse width
__
Fig. 3.1.1
MITSUBISHI MICROCOMPUTERS
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
1k
Measurement output pin
100pF
Measurement output pin
100pF
CMOS output
N-channel open-drain output
Fig. 63 Circuit for measuring output switching
characteristics(1)
Fig. 64 Circuit for measuring output switching
characteristics (2)
67
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timing Diagram
tC(CNTR)
tWL(CNTR)
tWH(CNTR)
0.8VCC
CNTR0, CNTR1
0.2VCC
tWL(INT)
tWH(INT)
0.8VCC
INT0 INT4
0.2VCC
tW(RESET)
RESET
0.8VCC
0.2VCC
tC(XIN)
tWL(XIN)
tWH(XIN)
0.8VCC
XIN
tC(SCLK1), tC(SCLK2)
tr
tWL(SCLK1 ), tWL(SCLK2)
tf
SCLK1
SCLK2
0.2VCC
0.8VCC
0.2VCC
tsu(RXD-SCLK1),
tsu(SIN2-SCLK2)
RXD
SIN2
th(SCLK1- RXD),
th(SCLK2-SIN2)
0.8VCC
0.2VCC
td(SCLK1 -TXD),td(SCLK2-SOUT2)
TXD
SOUT2
Fig. 65 Timing diagram (1) (in single-chip mode)
68
tWH(SCLK1 ), tWH(SCLK2)
tv(SCLK1 -TXD),
tv(SCLK2-SOUT2)
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timing Diagram in Memory Expansion Mode and Microprocessor Mode (CMOS level input)
tC(
tWH(
)
tWL(
)
)
0.5VCC
td(
- AH)
AD15 AD8
tv(
- AH)
tv(
- AL)
tv(
- SYNC)
tv(
- WR)
0.5VCC
td(
- AL)
AD7 AD0
0.5VCC
td(
- SYNC)
0.5VCC
SYNC
td(
RD,WR
- WR)
0.5VCC
tSU(ONW -
th(
)
- ONW )
0.8VCC
0.2VCC
ONW
tSU(DB-
th(
- DB)
tv(
-DB)
)
0.8VCC
0.2VCC
DB0 DB7
(At CPU reading)
td(
-DB)
DB0 DB7
(At CPU writing)
0.5VCC
Timing Diagram in Microprocessor Mode
RESET
0.8VCC
0.2VCC
0.5VCC
td(RESET- RESETOUT)
RESETOUT
tv(
- RESETOUT )
0.5VCC
Fig. 66 Timing diagram (2) (in memory expansion mode and microprocessor mode)
69
MITSUBISHI MICROCOMPUTERS
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timing Diagram in Memory Expansion Mode and Microprocessor Mode (CMOS level input)
tWL(RD)
tWL(WR)
RD,WR
0.5VCC
td(AH-RD)
td(AH-WR)
AD15 AD8
tv(RD-AH)
tv(WR-AH)
0.5VCC
td(AL- RD)
td(AL-WR)
AD7 AD0
tv(RD-AL)
tv(WR-AL)
0.5VCC
th(RD-ONW)
th(WR-ONW)
tsu(ONW-RD)
tsu(ONW-WR)
ONW
0.8VCC
0.2VCC
(At CPU reading)
RD
0.5VCC
tSU(DB-RD)
th(RD-DB)
0.8VCC
0.2VCC
DB0 DB7
(At CPU writing)
WR
0.5VCC
tv(WR-DB)
td(WR-DB)
DB 0 DB7
Fig. 67 Timing diagram (3) (in memory expansion mode and microprocessor mode)
70
0.5VCC
MITSUBISHI MICROCOMPUTERS
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timing Diagram in Memory Expansion Mode and Microprocessor Mode (TTL level input)
tC(
tWH(
)
tWL(
)
)
2.0V
0.8V
td(
tv(
- AH)
tv(
- AL)
tv(
- SYNC)
tv(
- WR)
th(
- ONW )
th(
- DB)
tv(
- DB)
- AH)
2.0V
0.8V
AD15 AD8
td(
- AL)
2.0V
0.8V
AD7 AD0
td(
- SYNC)
2.0V
0.8V
SYNC
td(
- WR)
2.0V
0.8V
RD,WR
tSU(ONW -
)
2.4V
0.45V
ONW
tSU(DB-
)
2.4V
0.45V
DB0 DB7
(At CPU reading)
td(
- DB)
DB0 DB7
(At CPU writing)
2.0V
0.8V
Timing Diagram in Microprocessor Mode
RESET
0.8VCC
0.2VCC
2.0V
0.8V
td(RESET- RESETOUT )
RESETOUT
tv(
- RESETOUT )
2.0V
0.8V
Fig. 68 Timing diagram (4) (in memory expansion mode and microprocessor mode)
71
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Timing Diagram in Memory Expansion Mode and Microprocessor Mode (TTL level input)
tWL(RD)
tWL(WR)
RD,WR
AD15 AD8
AD7 AD0
2.0V
0.8V
td(AH-RD)
td(AH-WR)
tv(RD-AH)
tv(WR-AH)
td(AL- RD)
td(AL-WR)
tv(RD-AL)
tv(WR-AL)
2.0V
0.8V
2.0V
0.8V
th(RD-ONW )
th(WR-ONW )
tsu(ONW-RD)
tsu(ONW-WR)
ONW
2.4V
0.45V
(At CPU reading)
RD
2.0V
0.8V
tSU(DB-RD)
th(RD-DB)
2.4V
0.45V
DB0 DB7
(At CPU writing)
WR
2.0V
0.8V
tv(WR-DB)
td(WR-DB)
DB0 DB7
Fig. 69 Timing diagram (5) (in memory expansion mode and microprocessor mode)
72
2.0V
0.8V
MITSUBISHI MICROCOMPUTERS
3807 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Keep safety first in your circuit designs!
•
Mitsubishi Electric Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with
semiconductors may lead to personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of
substitutive, auxiliary circuits, (ii) use of non-flammable material or (iii) prevention against any malfunction or mishap.
•
These materials are intended as a reference to assist our customers in the selection of the Mitsubishi semiconductor product best suited to the customer’s application; they do not convey any license under any
intellectual property rights, or any other rights, belonging to Mitsubishi Electric Corporation or a third party.
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Mitsubishi Electric Corporation semiconductors are not designed or manufactured for use in a device or system that is used under circumstances in which human life is potentially at stake. Please contact
Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product distributor when considering the use of a product contained herein for any specific purposes, such as apparatus or systems for
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Notes regarding these materials
•
•
•
•
•
•
© 1996 MITSUBISHI ELECTRIC CORP.
H-DF047-A KI-9609
New publication, effective Sep. 1996.
Specifications subject to change without notice.
REVISION DESCRIPTION LIST
Rev.
No.
1.0
3807 GROUP DATA SHEET
Revision Description
First Edition
Rev.
date
9711.30
(1/1)