beckiewynn@yahoo.co.uk wrote : > Page 229 tells us that ADCS0-ADCS2 are Fosc select bits. No, it does not say that ! I can't see "Fosc select bits" mentioned anyware. Again, Tosc is fixed and *ONLY* depending on your actual osccillator frequency (the inverse, simply) !! > The word "select" implies we are choosing (selcting) the value? Yes, but it not *Tosc* you are selecting, it's *Tad* !! Read again... :-) Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist