On Aug 7, 2008, at 3:42 AM, Shawn Tan wrote: >> is there a binary level specification for the opcodes of AVRs? I >> have the assembly programming specification and I hope to find it >> there. > > Oh, so what you were looking for is the "instruction set" of the AVRs. See also http://www.geocities.com/westfw/avr-instructionset.html This is a "decode table" for converting Hex opcodes to actual instructions, and gives a quick overview of the instruction set, as well as being "interesting" in its relative randomness. It's clear (IMMO) that the AVR is a very "top down" digital design... BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist