The 7477/7478 is a single-chip 8-bit CMOS microcomputer with simple instructions, ROM, RAM, and I/O addresses all located in the same memory map for easy programming. In addition, embedded PROM type microcomputers with built-in electrically writable PROM and additional functions equivalent to the mask ROM version are also available. The 7477/7478 group products are shown below. The 7477 and the 7478 differ only in the number of I/O ports, package outline, and clock generating circuit.
The Mitsubishi 7477/7478 group is a single-chip microcomputer designed with CMOS silicon gate technology. It is intended for use in business equipment and other consumer applications. The group includes various product versions with built-in PROM, mask ROM, or electrically writable PROM options.
| Clock input oscillation frequency | 8 MHz |
|---|---|
| ROM size (M37477M4) | 8192 bytes |
| Operating temperature range | -20 to 85°C |
The minimum instruction execution time is 0.5us when operating at an 8MHz oscillation frequency.
The device operates within a temperature range of -20 to 85°C.
You must apply a voltage of 2.7 to 5.5V to Vcc and 0V to Vss.