I have done this with two 16F84's (based on input from this very list) and it worked great. Bill Ruehl "Paul B. Webster VK2BZC" wrote: > Vincent Deno wrote: > > > We used a resonator with built-in caps to reduce costs to drive the > > first pic, and the osc outfrom pic #1 to osc in on pic #2. > > The caps in the resonator are presumably relatively large so this > shouldn't matter. If using a crystal, you should reduce the OSC2 cap on > the first device by the quoted input capacitance of the second PIC. > -- > Cheers, > Paul B.