ATMEGA644-20AU Family Name, Microchip ATMEGA644-20AU, 8bit AVR Microcontroller, ATmega, 20MHz, 64 kB Flash, 44-Pin TQFP

Microchip Technology Microcontroller
The Microchip Technology ATMEGA family type, TQFP package, surface mount, 44-pin CMOS-processor 8-bit microcontroller. It has a maximum voltage rating of 5.5V. The microcontroller operates at a maximum speed of 20MHz and features 64kb ISP flash program memory, 4kb of internal SRAM and 2kb of EEPROM. It has a real-time counter, PWM, 8-channel 10-bit A/D converter and a watchdog timer (WDT). By executing powerful instructions in a single clock cycle, it achieves throughputs approaching 1MIPS per MHz allowing the system to optimize power consumption versus processing speed.
Features and Benefits
131 powerful instructions - Most single-clock cycle execution 32 font face=\"symbol\""´/font 8 general-purpose working registers 32 programmable I/O lines External and internal interrupt sources Fully static operation On-chip 2-cycle multiplier Operating temperature ranges between -40°C and 85°C Power-on reset and programmable brown-out detection Six PWM channels Six sleep modes- Idle, ADC noise reduction, power-save, power-down, standby and extended standby Three USART with fractional baud rate generator, auto baud, and start-of-frame detection Write/Erase cycles- 10,000 flash/100,000 EEPROM
Applications
Embedded systems LCD monitors and TVs Mobile PC docking PC motherboards Portable hub boxes Printers and scanners