> > Voltage into a pin should not be lower than 0.6V or it'll pop, > > That should say MINUS 0.6V. As in a diode drop below ground. > 0 V in is perfectly acceptable on ALL PIC pins configured as inputs. Ah, good catch. Yes, I did mean -0.6V (internal diode voltage) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist