Datasheet Summary
Features
- 80C52 patible
- 8051 Instruction patible
- Six 8-bit I/O Ports (64 Pins or 68 Pins Versions)
- Four 8-bit I/O Ports (44 Pins Version)
- Three 16-bit Timer/Counters
- 256 Bytes Scratch Pad RAM
- 9 Interrupt Sources with 4 Priority Levels
- Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply (AT89S64 Only)
- ISP (In-System Programming) Using Standard VCC Power Supply
- 2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default
Serial Loader
- High-speed Architecture
- In Standard Mode: 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution) 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)
- In X2 mode (6...