PCB83C654 - CMOS Single-Chip 8-Bit Microcontroller
The P83C654 Single-Chip 8-Bit Microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family.
The 83C654 has the same instruction set as the 80C51.
Two versions of the derivative exist: 83C654 * 16k bytes mask programmable ROM 87C654 <
PCB83C654 Features
* 80C51 central processing unit
* 16k × 8 ROM expandable externally to 64k bytes
* 256 × 8 RAM, expandable externally to 64k bytes
* Two standard 16-bit timer/counters
* Four 8-bit I/O ports
* I2C-bus serial I/O port with byte oriented master and slave
