Jim Tellier wrote: > I've got a design that will use a 16F877 and a 16F676, on the same > PCB. In the interest of saving space (& component count), I'm > wondering if I can reliably drive both OSCIN's with the same XTAL? You can share an oscillator between PICs, but not that way. Set up one PIC to drive the crystal normally. Then have the OSCOUT of that PIC drive the OSCIN of the other PIC. > but obviously I don't want to use the OSCOUT of > one device to drive the other since it's 1/4 the Frequency. Huh? So you think the crystal magically turns the Fosc/4 at OSCOUT into Fosc at OSCIN. It doesn't work that way. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.