KPL wrote: >> prescaler, and by trapping TMR1 overflows, I acheive 1Hz resolution >> at up to 16MHz (24 bit count) without having to dink external >> prescalers or > > but the quarz oscillator is not THAT precise anyway... Of course it isn't, but that's no excuse for my code to not be right. ;-) I didn't say accuracy, I said resolution. :-) Of course that's only with a 1 second gate time and my needs were to obtain the value much more often so I used a shorter gate time. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist