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The evaluation tool is shipped with preloaded firmware that supports temperature sensing, light measurement, voltage readings and music playback. AVR Butterfly can also be used as a nametag. AVR Butterfly can be reprogrammed from AVR Studio using a serial cable for use as a development kit for the onboard ATmega169PV, or even as target hardware for simple applications. The bootloader source code is available as application note AVR109. The code is written for the ATmega169V device, but is compatible and will work correctly without board modifications with the onboard ATmega169PV device. AVR Studio online-help contains the most current information and a complete list of supported devices.

Key Features

  • LCD with 120 segments, for demonstrating the ATmega169 LCD controller
  • Four-direction joystick with centre push for user input
  • Piezo element to play sounds
  • 32kHz crystal for the real-time clock
  • 4Mbit DataFlash for data storage
  • RS-232 level-converter, for communicating with off-board units
  • NTC thermistor for temperature measurements
  • 3V button cell battery (600mAh) to provide operating power
  • JTAG connector for debugging
  • USI-interface, for additional communication interface
  • Supported by AVR Studio 4
  • Only a serial cable is required to reprogram the AVR Butterfly
  • Pre-programmed with a demonstration application, including bootloader

Ordering Code Atmel Store Availability1 Unit Price2 Buy Online

1Backlog orders can be placed for items currently not available.
2Suggested retail price per unit for budgetary use only.


AVR Butterfly - Bootloader rev04
AVR Butterfly - Bootloader rev04
(4030, updated January 2007)
AVR Butterfly - Application Rev07
AVR Butterfly - Application Rev07
(66375, updated January 2007)
AVR Butterfly - Application rev07 and Bootloader rev04
AVR Butterfly - Application rev07 and Bootloader rev04
(40867, updated January 2007)