Marty Robertson wrote: > I'm seeing that the pull up's value depends on the bus capacitance and > supply voltage. The minimum pullup value has nothing to do with capacitance, only supply voltage. Capacitance dictates how fast you can do. ****************************************************************** Embed Inc, Littleton Massachusetts, (978) 742-9014. #1 PIC consultant in 2004 program year. http://www.embedinc.com/products -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist