The W78C52C microcontroller is an 8-bit microcontroller that offers a wider frequency range than most 8-bit microcontrollers on the market. It is compatible with the industry standard 80C52 microcontroller series. The microcontroller features four 8-bit bidirectional parallel ports, three 16-bit timer/counters, and a serial port. These peripherals are supported by a six-source, two-level interrupt capability. It has 256 bytes of RAM and an 8 K byte mask ROM for application programs. The microcontroller also has two power reduction modes, idle mode and power-down mode, which can be selected through software. The idle mode turns off the processor clock but allows for continued peripheral operation, while the power-down mode stops the crystal oscillator for minimum power consumption. The external clock can be stopped at any time and in any state without affecting the processor.
The W78C52C is an 8‑bit CMOS microcontroller compatible with the 80C52 family. It offers four 8‑bit bidirectional ports, three 16‑bit timer/counters, a full‑duplex serial port, 256 bytes of RAM and 8 KB of mask ROM. The device supports a wide frequency range up to 40 MHz and includes built‑in power‑management features.
The document provides detailed pin configurations, functional descriptions, timing diagrams, absolute maximum ratings, DC/AC electrical characteristics and package dimensions for the DIP, PLCC and QFP variants.