> I'm getting a little bit of this. But I don't quite understand the > circuit behind this pin (RA4), but I think it's because I don't > know anything about the circuit behind the other pins either > Is there an acronym for 'I will work on that'? Er, RTFM ? ;-) Block diagrams of pins are in the manuals -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.