The W78C516 is a derivative of the W78C52 microcontroller family that provides extended internal ROM. The chip has 64K bytes of mask ROM and 256 bytes of RAM. This device provides an enhanced architecture that makes it more powerful and suitable for a variety of applications for general control systems. It provides on-chip 64KB mask ROM to accommodate large program codes, 256-bytes of non-volatile on-chip RAM, four 8-bit I/O ports, one 4-bit I/O port, three 16-bit timer/counters, eight sources with two-level interrupt structures, and on-chip oscillator clock circuits.
The W78C516 is a derivative of the W78C52 microcontroller family with extended internal ROM, providing 64 KB mask ROM and 256 bytes of RAM for general control system applications. It includes four 8‑bit I/O ports, one 4‑bit I/O port, three 16‑bit timer/counters, six interrupt sources with two priority levels, and on‑chip oscillator circuits.
Key features include DC‑to‑40 MHz operating frequency, built‑in power‑saving modes (Idle and Power‑down), and three package options: DIP‑40, PLCC‑44, and QFP‑44. The device offers 64 KB address space for both external program and data memory.
| Mask ROM size | 64 KB |
|---|---|
| On‑chip RAM size | 256 bytes |
| External program memory address space | 64 KB |
| External data memory address space | 64 KB |
| I/O ports | Four 8‑bit ports, one 4‑bit port |
| Timer/counters | Three 16‑bit |
| Interrupt sources | Six sources, two priority levels |
| Operating frequency | DC to 40 MHz |
| Package options | DIP‑40, PLCC‑44, QFP‑44 |
The W78C516 contains 64 KB of mask ROM on the chip.
It provides four 8‑bit bit‑addressable I/O ports and one additional 4‑bit bit‑addressable I/O port.
The microcontroller operates from DC up to 40 MHz.
It is offered in DIP‑40, PLCC‑44, and QFP‑44 packages.