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ATMEGA644 - 8-bit Microcontroller

General Description

Digital supply voltage.

Ground.

Port A serves as analog inputs to the Analog-to-digital Converter.

Key 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 20MHz.
  • High Endurance Non-volatile Memory segments.
  • 64 Kbytes of In-System Self-programmable Flash program memory.
  • 2 Kbytes EEPROM.
  • 4 Kbytes Internal SRA.

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Other Datasheets by Atmel (now Microchip Technology)

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ATmega644A 8-bit Atmel Microcontroller
ATMEGA644P 8-Bit Microcontroller
ATmega644PA 8-bit Microcontroller
ATmega64 8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash
ATMEGA640 8-BIT Microcontroller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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 20MHz • High Endurance Non-volatile Memory segments – 64 Kbytes of In-System Self-programmable Flash program memory – 2 Kbytes EEPROM – 4 Kbytes Internal SRAM – Write/Erase cyles: 10,000 Flash/100,000 EEPROM(1)(3) – Data retention: 20 years at 85°C/100 years at 25°C(2)(3) – Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation – Programming Lock for Software Security • JTAG (IEEE std. 1149.