This is not an endorsement of the source for the book, I just knew that they sold copies. This book has assembly language versions of master and slave for I2C. I am in the process myself of implementing on a pic 16f509, 8 pin chip. http://www.dontronics.com/sptoc.html -- View this message in context: http://www.nabble.com/-PIC-Looking-for-smallest-possible-PIC-Solution-with-I2C-Interface-t1603127.html#a4364420 Sent from the MicroControllers - PIC forum at Nabble.com. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist