On Thu, 13 Nov 1997 08:46:52 +1100, you wrote: >A couple of quick questions to the PIC Guru's on the list. > >(1) Is it possible to operate 2 PIC16C84's on the same pcb from one >crystal ? (XT mode). The data sheet shows how to use an external clock input >but I am uncertain how to obtain this clock from the other PIC without >loading the oscillator circuit. Yes - connect oscout on the crystal to oscin on the secons PIC. Keep track as short as poss. Adding a K or so series resistance may be useful to reduce loading, and you may need to reduce the cap on oscout to compensate for the extra track length and Cin of the second PIC ____ ____ _/ L_/ Mike Harrison / White Wing Logic / wwl@netcomuk.co.uk _/ L_/ _/ W_/ Hardware & Software design / PCB Design / Consultancy _/ W_/ /_W_/ Industrial / Computer Peripherals / Hazardous Area /_W_/