[time-nuts] How to get 32.768KHz from 10MHz.

Didier Juges didier at cox.net
Wed Jul 23 11:56:04 EDT 2008

Problem is one period of 32768 is not a multiple of 100nS (one period of 10 MHz) so that won't work. Maybe there is a common denominator and it may be possible to generate an average 32768 periods over one second, even though all periods may not be equal.

Didier KO4BB

---- Mike S <mikes at flatsurface.com> wrote: 
> At 10:09 AM 7/23/2008, Max Skop wrote...
> >How does one get a 32.768KHz signal from our 10MHz reference.
> >There does not appear to be a nice divide ratio to do this.
> I've thought about this too. It seems the simple way would be to clock 
> a PIC with the 10 MHz, then use loops to produce the 32768 Hz. It's 
> easier than it seems once you realize that phase noise doesn't really 
> matter in this application - duty cycles don't need to be exactly 50%, 
> etc. 
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