ATMEL 8-bit Flash Microcontroller AT89C51RE2 Manual
User Manual
7663B-8051 is an MCU with 80C52 compatibility and 8051 instruction compatibility, featuring six 8-bit I/O ports, three 16-bit timers/counters, 256 bytes of scratch pad RAM, 11 interrupt sources with 4 priority levels. The chip uses standard VCC power supply, integrated power monitor (POR/PFD) to supervise internal power supply, and contains serial loader for in-system programming.
