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DESCRIPTION
The 7531 Group is the 8-bit microcomputer based on the 740 family
core technology.
The 7531 Group has a serial I/O, 8-bit timers, and an A-D converter,
and is useful for control of home electric appliances and office auto-
mation equipment.
FEATURES
Basic machine-language instructions....................................... 69
The minimum instruction execution time .......................... 0.50 μs
(at 8 MHz oscillation frequency for the shortest instruction, in high-
speed mode)
Memory size ROM ..............................................8K to 16K bytes
RAM ..............................................256 to 384 bytes
Programmable I/O ports ........................................................... 29
(25 in 32-pin version)
Interrupts .................................................... 12 sources, 8 vectors
(11 sources, 8 vectors for 32-pin version)
Timers ............................................................................ 8-bit
3
Serial I/O1 ...................................................................... 8-bit
1
(UART)
Serial I/O2 ...................................................................... 8-bit
1
(Clock-synchronized)
A-D converter ................................................ 10-bit
8 channels
(6 channels for 32-pin version)
Clock generating circuit ............................................. Built-in type
(connect to external ceramic resonator or quartz-crystal oscillator
permitting RC oscillation)
Watchdog timer ............................................................ 16-bit
1
Power source voltage
At 8 MHz X
IN
oscillation frequency at ceramic oscillation
...................................................................................4.0 to 5.5 V
At 4 MHz X
IN
oscillation frequency at ceramic oscillation
...................................................................................2.4 to 5.5 V
At 2 MHz X
IN
oscillation frequency at ceramic oscillation
...................................................................................2.2 to 5.5 V
At 4 MHz X
IN
oscillation frequency at RC oscillation
...................................................................................4.0 to 5.5 V
At 2 MHz X
IN
oscillation frequency at RC oscillation
...................................................................................2.4 to 5.5 V
At 1 MHz X
IN
oscillation frequency at RC oscillation
...................................................................................2.2 to 5.5 V
Power dissipation ............................................ 25 mW (standard)
Operating temperature range ................................... –20 to 85 °C
(–40 to 85 °C or –40 to 125 °C for extended operating temperature
version)
APPLICATION
Office automation equipment, factory automation equipment, home
electric appliances, consumer electronics, car, etc.
PIN CONFIGURATION (TOP VIEW)
Fig. 1 Pin configuration (36P2R package type)
Package type: 36P2R-A
10
1
2
3
4
6
7
8
9
11
12
14
15
16
5
13
17
18
36
35
34
33
31
30
26
25
24
23
22
21
20
19
32
27
29
28
P0
0
P3
7
/INT
0
CNV
SS
Vcc
X
OUT
V
SS
X
IN
P0
1
P0
2
P0
3
P0
4
P3
0
(LED
0
)
V
REF
P0
5
P1
0
/R
X
D
P0
7
P2
6
/AN
6
P2
7
/AN
7
P1
1
/T
X
D
P1
2
/S
CLK
P1
3
/S
DATA
P1
4
/CNTR
0
P2
3
/AN
3
P2
4
/AN
4
P2
5
/AN
5
P2
2
/AN
2
P2
1
/AN
1
P2
0
/AN
0
P3
1
(LED
1
)
P3
6
(LED
6
)/INT
1
P3
5
(LED
5
)
P3
4
(LED
4
)
P3
3
(LED
3
)
P3
2
(LED
2
)
P0
6
RESET
M
M
M
M
M
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7531 Group