ATMEGA644 Datasheet - ATMEL Corporation

ATMEGA644 - 8-bit Microcontroller

2.2.1 VCC 2.2.2 GND Digital supply voltage. 2.2.3 Ground. 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 symmetri.

ATMEGA644 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 Thr

ATMEGA644_ATMELCorporation.pdf