PHILIPS P89C51X2/52X2/54X2/58X2 80C51 8-bit Flash microcontroller family 4K/8K/16K/32K Flash 128B/256B RAM handbook
Datasheet
This document describes the features and characteristics of the Philips Semiconductors P89C51X2/52X2/54X2/58X2 80C51 8-bit Flash microcontroller family, including Flash program memory, RAM, I/O lines, counter/timers, interrupt structure, serial I/O port, and clock circuits.
