Richard Mellina wrote... >Thanks for the quick reply. >The 16F628 does not have any A/D converters. No, but it has comparators on port A, and they remain enabled out of reset until you turn them off by initializing the CMCON register. DD -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads