The 12F PICs have two bandgap calibration bits in the fuses word that should be saved/restored by the progranmmer when the chip is erased. Has anyone found a clue as to what these bits are used for by the chip? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body