MITSUBISHI MICROCOMPUTERS
7477/7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FUNCTIONS OF 7477/7478 GROUP
Parameter
Basic machine-language instructions
Instruction execution time
Functions
71
0.5µs (The minimum instructions, at 8 MHz oscillation frequency)
Clock input oscillation frequency
8 MHz (max.)
M37477M4
M37478M4
M37477M8/E8
M37478M8/E8
P0, P1
ROM
8192 bytes
RAM
(P)ROM
RAM
I/O
192 bytes
Memory size
16384 bytes
384 bytes
8-bit ✕ 2
P2
Input
Input
I/O
8-bit ✕ 1 (4-bit ✕ 1 for the 7477 group)
Input/Output port
P3, P5
4-bit ✕ 2 (Port P5 is not included in the 7477 group)
P4
4-bit ✕ 1 (2-bit ✕ 1 for the 7477 group)
Serial I/O
Timers
8-bit ✕ 1
8-bit timer ✕ 4
A-D converter
8-bit ✕ 1 (8 channels) (8-bit ✕ 1 (4 channels) for the 7477 group)
96 (max.)
M37477M4, M37478M4
Subroutine nesting
192 (max.)
M37477M8/E8, M37478M8/E8
Interrupt
5 external interrupts, 7 internal interrupts, 1 software interrupt
Built-in circuit with internal feedback resistor (a ceramic or a quartz-
crystal oscillator)
Clock generating circuit
2.7 to 4.5V (at 2.2VCC–2.0MHz oscillation frequency), 4.5 to 5.5V
(at 8MHz oscillation frequency)
Power source circuit
Power dissipation
35mW (at 8MHz oscillation frequency)
5V
Input/Output voltage
Output current
Input/Output characters
–5 to 10mA (P0, P1, P4 : CMOS tri-states)
–20 to 85°C
Operating temperature range
Device structure
CMOS silicon gate
32-pin shrink plastic molded DIP
32-pin plastic molded SOP
42-pin shrink plastic molded DIP
56-pin plastic molded QFP
42-pin ceramic DIP
M37477M4/M8/E8-XXXSP
M37477M4/M8/E8-XXXFP
M37478M4/M8/E8-XXXSP
M37478M4/M8/E8-XXXFP
M37478E8SS
Package
6
MITSUBISHI [ Mitsubishi Group ]
