> Perhaps I'm misunderstanding something Olin but to me "serial resistors in > the scl and sda wire" does NOT sound like he/she is using those resistors > for pullups. While out of spec I don't understand how putting a 600ohm > resitor in series with either the scl or sda lines has any chance of harming > an I2C part. TTYL I didn't catch the fact that they were in series. I thought he was using 600 ohm pullups on each unit. Sorry. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.