James Nick Sears wrote: > And Olin, have YOU even looked at the datasheet? There is some info > yes, but it's not immediately apparent how to select RC values or the > range of appropriate frequencies with an RC to someone who doesn't > have some prior knowledge of how RC oscillators work. I know about RC circuits, about the time constant, about exponential decay and all that. What I don't know is how the RC values actually yield a specific processor speed. I just need an equation, something like: Processor Speed = 7.56 * Time Constant And then my next question would be what capacitor value I should use, given that I can have a really small one with a really big resistance, or a really big one with a really small resistance. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist