C Programming for Microcontrollers : Featuring ATMEL's AVR Butterfly and the FREE WinAVR Compiler by Joe Pardue (2006, Trade Paperback) for sale online | eBay
AT AVR BUTTERFLY: Atmel AVR Butterfly, Demoboard mit ATmega169 bei reichelt elektronik
BASIC BLOCK DIAGRAM
Stand alone AVR butterfly datalogger - Embedds
Polyphemus – The Colorful AVR Butterfly! - Embedds