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MITSUBISHI MICROCOMPUTERS
7477/7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DESCRIPTION
The 7477/7478 group is the single-chip microcomputer designed
with CMOS silicon gate technology.
The single-chip microcomputer is useful for business equipment
and other consumer applications.
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.
In addition, built-in PROM type microcomputers with built-in elec-
trically writable PROM, and additional functions equivalent to the
mask ROM version are also available.
7477/7478 group products are shown noted below.
The 7477 and the 7478 differ in the number of I/O ports, package
outline, and clock generating circuit only.
Version
Mask ROM version
One Time PROM version
(Built-in PROM type microcomputers)
Mask ROM version
One Time PROM version
(Built-in PROM type microcomputers)
PROM version
(Built-in PROM type microcomputer)
Product
M37477M4-XXXSP/FP
M37477M8-XXXSP/FP
M37477E8SP/FP
M37477E8-XXXSP/FP
M37478M4-XXXSP/FP
M37478M8-XXXSP/FP
M37478E8SP/FP
M37478E8-XXXSP/FP
M37478E8SS
FEATURES
G
Basic machine-language instructions ......................................71
G
Memory size
ROM.............................. 8192 bytes (M37477M4, M37478M4)
RAM ................................ 192 bytes (M37477M4, M37478M4)
G
The minimum instruction execution time
......................................0.5
μ
s (at 8MHz oscillation frequency)
G
Power source voltage
.......... 2.7 to 4.5V (at 2.2V
CC
– 2.0MHz oscillation frequency)
............................. 4.5 to 5.5V (at 8MHz oscillation frequency)
G
Power dissipation in normal mode
.................................... 35mW (at 8MHz oscillation frequency)
G
Subroutine nesting
................................. 96 levels max. (M37477M4, M37478M4)
G
Interrupt ................................................... 13 sources, 11 vectors
G
8-bit timers ................................................................................. 4
G
Programmable I/O ports
(Ports P0, P1, P4) .......................................... 18 (7477 group)
20 (7478 group)
G
Input ports (Ports P2, P3) .................................... 8 (7477 group)
(Ports P2, P3, P5) ............................16 (7478 group)
G
8-bit serial I/O........................... 1 (UART or clock-synchronized)
G
8-bit A-D converter................................4 channels (7477 group)
8 channels (7478 group)
PIN CONFIGURATION (TOP VIEW)
APPLICATIONS
Audio-visual equipment, VCR, Tuner,
Office automation equipment
Note :
The only differences between the 32P4B package prod-
uct and the 32P2W-A package product are package
shape and absolute maximum ratings.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
M
M
M
P1
7
/S
RDY
P1
6
/S
CLK
P1
5
/T
X
D
P1
4
/R
X
D
P1
3
/T
1
P1
2
/T
0
P1
1
P1
0
P2
3
/IN
3
P2
2
/IN
2
P2
1
/IN
1
P2
0
/IN
0
V
REF
X
IN
X
OUT
V
SS
P0
7
P0
6
P0
5
P0
4
P0
3
P0
2
P0
1
P0
0
P4
1
P4
0
P3
3
/CNTR
1
P3
2
/CNTR
0
P3
1
/INT
1
P3
0
/INT
0
RESET
V
CC
Outline 32P4B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
M
M
M
P1
7
/S
RDY
P1
6
/S
CLK
P1
5
/T
X
D
P1
4
/R
X
D
P1
3
/T
1
P1
2
/T
0
P1
1
P1
0
P2
3
/IN
3
P2
2
/IN
2
P2
1
/IN
1
P2
0
/IN
0
V
REF
X
IN
X
OUT
V
SS
P0
7
P0
6
P0
5
P0
4
P0
3
P0
2
P0
1
P0
0
P4
1
P4
0
P3
3
/CNTR
1
P3
2
/CNTR
0
P3
1
/INT
1
P3
0
/INT
0
RESET
V
CC
Outline 32P2W-A