> I take it that the internal oscillators that Mchip has > internal are just as good as putting an external > crystal and associated parts. They are very good at oscillating, but the frequnecy accuracy will not match a resonator, much less a crystal. Whether it is sufficient for your application depends on what you need. Last time I checked I would not yet use them for asynch. 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