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ATmega644A Datasheet 8-bit Atmel Microcontroller

Manufacturer: Atmel (now Microchip Technology)

Download the ATmega644A datasheet PDF. This datasheet also includes the ATmega164A variant, as both parts are published together in a single manufacturer document.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (ATmega164A-ATMELCorporation.pdf) that lists specifications for multiple related part numbers.

Overview

ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable.

Key Features

  • High-performance, low-power 8-bit Atmel® AVR® Microcontroller.
  • Advanced RISC architecture ̶ 131 powerful Instructions.
  • most single-clock cycle execution ̶ 32 × 8 general purpose working registers ̶ Fully static operation ̶ Up to 20MIPS throughput at 20MHz ̶ On-chip 2-cycle multiplier.
  • High endurance non-volatile memory segments ̶ 16/32/64/128KBytes of In-System Self-programmable Flash program memory ̶ 512/1K/2K/4KBytes EEPROM ̶ 1/2/4/16KBytes Internal SRAM ̶ Write/Erase.