Can anyone with a 16f877a confirm the device ID value for me? The programming manual mentions the same value as for a 16f873a, which strikes me as a bit odd, and - coincidence - I read a different value from a 16f873a, so probably only that value is stated wrong. (874a and 876a do read the stated value). Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.