MITSUBISHI MICROCOMPUTERS
7470/7471 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
The 7470/7471 group is a single-chip microcomputer designed
with CMOS silicon gate technology. It is housed in a 32-pin shrink
plastic molded DIP. The M37471M2-XXXSP/FP is a single-chip mi-
crocomputer designed with CMOS silicon gate technology. It is
housed in a 42-pin shrink plastic molded DIP or a 56-pin plastic
molded QFP.
1
2
3
4
5
6
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
P17/SRDY
P16/CLK
P07
P06
P05
P15/SOUT
P14/SIN
P04
These single-chip microcomputer are useful for business equip-
ment and other consumer applications.
P03
P13/T1
P12/T0
P02
In addition to its simple instruction set, the ROM, RAM, and I/O
addresses are placed on the same memory map to enable easy
programming .
7
8
P11
P10
P01
P00
9
P23/IN3
P22/IN2
P21/IN1
P20/IN0
VREF
P41
The differences between the M37471M2-XXXSP and the
M37471M2-XXXFP are the package outline and the power dissi-
pation ability (absolute maximum ratings).
10
P40
11
12
13
14
15
16
P33/CNTR1
P32/CNTR0
P31/INT1
P30/INT0
RESET
VCC
The differences among M37470M2-XXXSP, M37470M4-XXXSP,
M37470M8-XXXSP, M37471M2-XXXSP/FP, M37471M4-XXXSP/
FP and M37471M8-XXXSP/FP are noted below.
XIN
XOUT
VSS
Type name
ROM size
4096 bytes
RAM size
128 bytes
I/O ports
26
Outline 32P4B
M37470M2-XXXSP
M37471M2-XXXSP/FP
M37470M4-XXXSP
M37471M4-XXXSP/FP
M37470M8-XXXSP
M37471M8-XXXSP/FP
36
26
8192 bytes
192 bytes
384 bytes
36
APPLICATION
26
16384 bytes
Audio-visual equipment, VCR, Tuner,
36
Office automation equipment
FEATURES
●Basic machine-language instructions ...................................... 71
●Memory size
ROM ..................................................... 4096 bytes (M37471M2)
RAM ........................................................ 128 bytes (M37471M2)
●The minimum instruction execution time
....................................... 0.5 µs (at 8 MHz oscillation frequency)
●Power source voltage
.............. 2.7 to 4.5 V (at 2.2VCC–2.0 MHz oscillation frequency)
............................... 4.5 to 5.5 V (at 8 MHz oscillation frequency)
●Power dissipation in normal mode
................................... 35 mW (at 8.0 MHz oscillation frequency)
●Subroutine nesting ...... 64 levels max. (M37470M2, M37471M2)
●Interrupt ................................................... 12 sources, 10 vectors
●8-bit timers .................................................................................. 4
●Programmable I/O ports
(Ports P0, P1, P2, P4) ......................................... 22(7470 group)
28(7471 group)
●Input port (Port P3) ............................................... 4(7470 group)
(Ports P3, P5)....................................... 8(7471 group)
●Serial I/O (8-bit) .......................................................................... 1
●A-D converter ............................... 8-bit, 4channels (7470 group)
8-bit, 8channels (7471 group)
ETC [ ETC ]
