>> Those two manuals were my first references to turn to , and the reason why I went software is because in the Mid-range ref manual, page 248 (design tips): "Question 2: Using I2C mode, I do not seem able to make the master mode work. Answer: The SSP module... << Yes, but the 16F877 has a MSSP module. The "M" stands for "master". ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.