Part Number : ATMEGA640
Function : 8-bit Atmel Microcontroller
Package : TQFP 100 Pin Type
Maker : Atmel Corporation
Image : 
Description :
The ATmega640 / ATmega1280 / ATmega1281 / ATmega2560 / ATmega2561 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 ATmega640/1280/1281/2560/2561 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
Features
1. Advanced RISC Architecture
(1) 135 Powerful Instructions
(2) Most Single Clock Cycle Execution
(3) 32 × 8 General Purpose Working Registers
(4) Fully Static Operation
(5) Up to 16 MIPS Throughput at 16MHz
(6) On-Chip 2-cycle Multiplier
Datasheet PDF Download : 
Others datasheet of same file :
ATmega1280-16AU, ATmega1280-16AUR, ATmega1280-16CU,
ATmega1280-16CUR, ATmega1280/V
