The W78E054C is an 8-bit microcontroller with low power consumption and a wide frequency range.
The W78E054C/W78E54C is an 8‑bit CMOS microcontroller compatible with the standard 8051 instruction set. It integrates 16 KB Flash EPROM, 256 bytes of RAM, four 8‑bit bi‑directional I/O ports, an additional 4‑bit port (P4), three 16‑bit timer/counters, a full‑duplex UART, and a watchdog timer.
The device operates from a 4.5 V to 5.5 V supply, offers 64 KB program and data address spaces, and is available in lead‑free DIP‑40, PLCC‑44, and PQFP‑44 packages. It includes power‑down and idle modes for low‑power operation and features EMI‑reduction controls.
| Flash EPROM size | 16 KB |
|---|---|
| RAM size | 256 bytes |
| Supply voltage range | 4.5 V to 5.5 V |
| Program memory address space | 64 KB |
| Data memory address space | 64 KB |
| Timers | Three 16‑bit timer/counters |
| Serial interface | One full‑duplex UART |
| Watchdog timer | Included |
The microcontroller operates from 4.5 V to 5.5 V.
It includes a 16 KB electrically erasable/programmable Flash EPROM.
Yes, the microcontroller includes a watchdog timer for system monitoring.