Re. varying clock rate of PICs. I had a flyer from my local distributor drop through to letterbox today, in it there is mention of the 16C717, 770 and 771 which include: "Dual speed oscillator, dynamically toggle operating frequency" and "ER mode allows adjustment of execution speed using a single resistor" Cheers Andy . -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu