Atmel AT89C52 Microcontroller
Sepcifications
Program store enable; Read from external program memory PSEN
Address Latch Enable
Program pulse input during Flash programming Prog
External Access Enable; Vcc for internal program executions
Programming enable voltage; 12V (during Flash programming)
8 bit input/output port (P ) pins
Low-order address bits when interfacing with external memo
Supply voltage; 5V (up to 6.6V)