ATmega644 8-bit AVR Microcontroller With 64K Bytes In-System Programmable Flash

ATmega644 8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash ,The ATMEGA644 is a low-power CMOS 8-bit Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single Clock cycle, the ATMEGA644 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. By ATMEL Corporation