"David E. Olson" wrote: > > > > > Clock /4 is machine cycles, > > prescale by 16 to get the most cycles / PWM period. > > > > SO: 23Hz * 255 * 16 *4 = 375,360 Hz clock. > > > > Another bummer about this is that I can't seem to find a 375k resonator with > built-in caps. I've got a board with holes for a 3-pin resonator and no > provision for load caps. > > Is there such a thing? Panasonic and Murata have ones at 2MHz and above. Same with ESC inc, so i think you are stuck with it. How about a pair of caps on the solder side of the board? Don McKenzie mailto:don@dontronics.com http://www.dontronics.com World's Largest Range of Atmel/AVR and PICmicro Hardware and Software. Free Basic Compiler and Programmer http://www.dontronics.com/runavr.html