> Some new PICs have a similar circuit built in, but I know the > 12F629 is not one of them. IIRC not, the weren't the 16F818/819 the first nanopower chips? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist