ATMEGA644P Datasheet - ATMEL Corporation

ATMEGA644P 8-Bit Microcontroller

2.3.1 VCC Digital supply voltage. 2.3.2 GND Ground. 2.3.3 Port A (PA7:PA0) Port A serves as analog inputs to the Analog-to-digital Converter. Port A also serves as an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port A output buffers have symmetrica.

ATMEGA644P Features

* High-performance, Low-power Atmel® AVR® 8-bit Microcontroller

* Advanced RISC Architecture ̶ 131 Powerful Instructions

* Most Single-clock Cycle Execution ̶ 32 × 8 General Purpose Working Registers ̶ Fully Static Operation ̶ Up to 20 MIPS Throughput at 20 MHz ̶ On-chip 2-cycle Mult

ATMEGA644P_ATMELCorporation.pdf