Martin McCormick wrote: > I understand that the oscillator in a PIC is divided by 4 to > get the event clock frequency. Is the input for TMR0 and its optional > prescaler the oscillator frequency or the event clock frequency? Fosc/4, wich is perfectly clear from the "block diagram" of TMR0 from a data sheet from just about any PIC (that has a TMR0, of course)... Jan-Erik. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads