The 38B4 series is an 8-bit microcomputer based on the 740 family core technology. The 38B4 series has six 8-bit timers, a 16-bit timer, a fluorescent display automatic display circuit, 12-channel 10-bit A-D converter, a serial I/O with automatic transfer function, which are available for controlling musical instruments and household appliances.
The 38B4 group is an 8‑bit CMOS microcomputer from Mitsubishi Microcomputers, featuring built‑in timers, A/D converter, PWM, and a range of I/O ports for use in musical instruments, VCRs, and household appliances.
This datasheet lists the device’s electrical characteristics, pin assignments, memory configurations, functional block diagram, and expansion plans, along with part numbering and revision information.
| Supply voltage | 4.0‑5.5 V |
|---|---|
| I/O pins | 40 control pins |
| A/D converter | 12‑channel 10‑bit |
| PWM output | 14‑bit |
| Timers | Six 8‑bit timers and one 16‑bit timer |
It operates from a supply voltage of 4.0 V to 5.5 V applied to the Vcc pin.
The device provides a total of 40 control pins for I/O functions.