> > > AFAIR an internal pull up is somewhat im-precise but usually equates to > 50k or > more. It's been about forever since I was deep enough into that to speak with authority, I was near certain that the internal weak pull ups are implemented in the silicon as current mirrors - hence the non-specific pull up "value". -Denny --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .