Serge, Serge Bets wrote: > On Thursday, April 10, 2008 at 18:02:38 +0100, Maciej W. Rozycki wrote: > >>> This holds the clock for up to a second >> I am not sure what you mean > > Anyway I experimented a little: This doesn't seem to work as I hoped. > And it can even lock the clock, requiring a oscillator reset. :-( > > The idea was about the RTC_SET flag (bit #7 of register B). It suspends > clock updates, without any effect on the oscillator nor PIE. I was > hoping it would delay next updates by as long as it was asserted. But > no: the next update is either skipped, or happens at the usual time.
About 20 years ago I worked with the same same RTC type which was controlled by a microcontroller. IIRC we changed the clock rate of the counter chain to the highest rate for a certain interval in order to compensate the 500 ms offset which was introduced when the RTC was set to a new time. Martin -- Martin Burnicki Meinberg Funkuhren Bad Pyrmont Germany _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
