--- William Chops Westfield wrote: > What oscillator modes are you using? Do resonators > need to > change mode with speed like crystals? Do they need > to NOT > change modes? Of course I tried both XT and HS modes. But neither started reliably. The real pain is smd footprints - 20MHz resonators with builtin caps come with pitches of 1.0, 1.2, 1.35, 1.5 and 2.5mm, so I limit myself to a smaller group of parts after I lay out the PCB. Cheerful regards, Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist