The 3823 group is an 8-bit microcomputer based on the 740 family core technology. The 3823 group has features such as an LCD drive control circuit, an 8-channel A/D converter, a serial interface, a watchdog timer, a ROM correction function, and additional functions. The various microcomputers in the 3823 group include variations of internal memory size and packaging.
The 3823 Group is a single‑chip 8‑bit CMOS microcomputer that integrates an LCD drive circuit, an 8‑channel A/D converter, a serial interface, a watchdog timer, ROM correction, and programmable I/O ports. It is offered in various memory sizes and package types, with detailed pin‑out diagrams and functional block descriptions.
Key performance data include a minimum instruction execution time of 0.4 µs at 10 MHz, a maximum oscillation frequency of 10 MHz, ROM sizes from 16 KB to 60 KB, RAM from 640 B to 2.56 KB, and a range of power‑supply voltages depending on clock mode. The document also lists part numbering, expansion plans, and revision history.
| Instruction execution time | 0.4 µs (minimum, f(XIN)=10 MHz, high‑speed mode) |
|---|---|
| Maximum oscillation frequency | 10 MHz |
| Number of basic instructions | 71 |
| ROM size | 16 KB to 60 KB |
| RAM size | 640 B to 2 560 B |
The minimum instruction execution time is 0.4 µs at a 10 MHz clock in high‑speed mode.
The maximum oscillation frequency is 10 MHz.
ROM sizes range from 16 KB to 60 KB.