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HARDWARE
7531 Group User’s Manual
1-2
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 s
(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 XIN oscillation frequency at ceramic oscillation
................................................................................... 4.0 to 5.5 V
At 4 MHz XIN oscillation frequency at ceramic oscillation
................................................................................... 2.4 to 5.5 V
At 2 MHz XIN oscillation frequency at ceramic oscillation
................................................................................... 2.2 to 5.5 V
At 4 MHz XIN oscillation frequency at RC oscillation
................................................................................... 4.0 to 5.5 V
At 2 MHz XIN oscillation frequency at RC oscillation
................................................................................... 2.4 to 5.5 V
At 1 MHz XIN 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
P00
CNVSS
XOUT
XIN
VSS
P01
P02
P03
P04
P30(LED0)
Vcc
VREF
P05
P10/RXD
P26/AN6
P27/AN7
P11/TXD
P12/SCLK
P13/SDATA
P23/AN3
P22/AN2
P21/AN1
P20/AN0
P31(LED1)
P36(LED6)/INT1
P24/AN4
P25/AN5
P06
P07
P37/INT0
RESET
M37531M4-XXXFP
M37531M4T-XXXFP
M37531M8-XXXFP
M37531E4FP
M37531E8FP
P14/CNTR0
P35(LED5)
P34(LED4)
P33(LED3)
P32(LED2)
DESCRIPTION/FEATURES/APPLICATION/PIN CONFIGURATION