8-bittinen MCU; 64kB-FL; 4kB-SRAM; 2kB-EE; 32 I/O; 1,8V~5,5V; 20MHz; A/D; USART; SPI; TWI; -40°C ~ 85°C; , Vastine: ATMEGA644P-20AU; ATMEGA644PV-10AU; ATMEGA644PA-AUR;