> John, > > That's interesting to me. What exactly are the actual structural limitations > of [that] pic? > > -CH
The PIC has a 4:1 external clock / internal instruction cycle ratio so a software-based divider can't divide by a low number like 10. See www.LeapSecond.com/picdiv for details, and source code. Although initially intended as a 1 PPS divider, the [re]programmable PIC and TAPR T2-Mini make a compact frequency divider solution for frequencies from once a day to 100 kHz. As far as frequencies close to 10 MHz -- I assumed that division by 2 (e.g., 10 MHz -> 5 MHz) or division by 10 (e.g., 10 MHz -> 1 MHz) were simple to implement using a single IC (one flip-flop or decade counter). The '7490 or '390 come to mind. /tvb _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
