I thought....from the datasheet...that if you set up the config for the internal clock using the config directive of "_INTRC_IO" that it will by default allow those pins to be I/O Is there something else I need to do? I've got TRISA all set to '1's, ADCON1 set for all of PORTA to be digital....there isnt anything else I see that needs to be done? Bottom line...input signal doesnt appear to be getting inside.... --------------------------------- Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist