> So, should the "INTRC" be accurate enough? I doubt it. Check the datasheet, if it promises 1% accuracy it is OK. But it will be much batter than an external RC oscillator. 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