P89C557E4 Overview
The P8xC557E4 has the same instruction set as the 80C51. Three versions of the derivative exist: For systems that require extra capability the P8xC557E4 can be expanded using standard TTL patible memories and logic.
P89C557E4 Key Features
- P83C557E4
- 32 Kbytes mask programmable ROM P80C557E4
- ROMless version of the P83C557E4 P89C557E4
- 32 Kbytes FEEPROM (Flash-EEPROM)
- Idle Mode and power-down mode. The Idle Mode freezes the CPU while allowing the RAM, timers, serial ports, and interrupt