P89C5x microcontroller is a 8-bit microcontroller produced by Philips company, using advanced CMOS technology, with non-volatile FLASH program storage, and supports serial system-on-chip programming.
The Philips P89C5x series are 8‑bit microcontrollers compatible with the 80C51 instruction set. They integrate on‑chip FLASH program memory, RAM, three 16‑bit timers, UART, watchdog and multiple I/O ports. Variants differ in flash size (4 KB‑32 KB) and RAM (128‑256 bytes).
The document provides pin‑out tables for PLCC, PQFP and PDIP packages, describes special function registers, power‑down and idle modes, and details the Timer/Counter2 operation modes. Package dimensions and voltage ranges are also listed. This manual is written in Chinese.