The 3874 group is the 8-bit microcomputer based on the 740 family core technology. The 3874 group includes data link layer communication control circuit, A-D converters, D-A converter, automatic data transfer serial I/O, UART, and watchdog timer etc.
The Mitsubishi 3874 Group is a single-chip 8-bit CMOS microcomputer based on 740 family core technology. It integrates various functions including data link layer communication control circuits, analog-to-digital (A-D) and digital-to-analog (D-A) converters, UARTs, and watchdog timers to reduce system complexity.
The group offers variations in internal memory size and packaging types, such as 80-pin DIP or PLCC. Key features include up to 61KB of ROM, 2KB of RAM, multiple I/O ports with programmable directions, three 8-bit timers, two 16-bit timers, and support for operating temperatures from -40°C to +85°C.
| Architecture | 8-bit CMOS Microcomputer |
|---|---|
| ROM Size Range | 16 K to 60 K bytes |
| RAM Size Range | 1024 to 2048 bytes |
The minimum instruction execution time is 0.32 us at a 6.4 MHz oscillation frequency in double-speed mode.
It is designed for automotive comfort control, body electronics, household appliances, and other consumer applications.