The W78C32B is an 8‑bit CMOS microcontroller with a wide frequency range and compatibility with the 80C32 series. It includes four 8‑bit bidirectional ports, three 16‑bit timer/counters, a full‑duplex serial port, 256 bytes of on‑chip RAM, and supports ROMless operation.
Key features include low standby current, two software‑selectable power‑management modes (idle and power‑down), 64 KB program and data memory spaces, and a built‑in Boolean processor. Electrical specifications cover operating voltage, current consumption, and temperature limits, while package data list DIP‑40, PLCC‑44, and QFP‑44 options.
| Program memory address space | 64 KB |
|---|---|
| Data memory address space | 64 KB |
| On‑chip RAM | 256 bytes |
| I/O ports | Four 8‑bit bidirectional ports |
| Timers/Counters | Three 16‑bit timer/counters |
| Serial port | One full‑duplex serial port |
| Operating voltage (typical) | 5 V ±10 % |
| Maximum operating temperature | 70 °C |
| Storage temperature range | -55 °C to +150 °C |
It provides two software‑selectable power‑management modes: idle mode and power‑down mode.
The device includes 256 bytes of on‑chip RAM.
The maximum operating temperature is 70 °C.
It is offered in 40‑pin DIP, 44‑pin PLCC, and 44‑pin QFP packages.