Hi The normal NTP kernel does a pretty good job in “flywheel” mode. For modest outages, it’s quite adequate.
Bob > On Nov 1, 2017, at 7:21 PM, MLewis <mlewis...@rogers.com> wrote: > > Is this a workable or worthwhile strategy?: > - RTC providing date & time to second to system on boot > - RTC frequency output driving a counter/divider to produce PPS > - GPS module providing UTC PPS > - GPS module's secondary PPS disciplining the RTC-counter-divider PPS by > resetting the RTC's counter/divider (I'm assuming there's one that will rest > fast enough to sync; I've never looked into these...) > > If GPS PPS is lost, then the RTC counter/divider is producing a recently > disciplined PPS. > > Valid or invalid? > > And the DS3231 has: > - a 32K output, and > - an Active-Low-Interrupt/SQW output that can be set to PPS. > It's unclear to me how to sync the DS3231 PPS to the GPS PPS, or if that can > be done. > > Thanks, > > Michael > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.