[time-nuts] Using a frequency synthesizer replacement for motherboard oscillator

Eric Garner garnere at gmail.com
Sat Dec 1 00:15:28 UTC 2012

I've never done it using to the RTC crystal, but I  do it quite frequently
in my Day Job to Ethernet controllers on those same pc mother boards.


On Fri, Nov 30, 2012 at 4:10 PM, Sarah White <kuzetsa at gmail.com> wrote:

> On 11/30/2012 6:30 PM, Eric Garner wrote:
> > the actual RTC on modern (Intel based) PC's is driven from a standard
> > 32,768 Hz crystal attached to the PCH. some of them are in incredibly
> small
> > packages now instead of the old tuning fork-in-a-can ones. peeling off
> the
> > load caps and crystal from the board would allow you plenty of spaces to
> > tack down a lead from an external synthesizer.
> Yeah, the one on the (Soekis) example was pretty small. So far none of
> of the replies have indicated that anyone on here has experience beyond
> an embedded system.
> Mostly I started this thread because there have been a few with people
> discussing implementing NTP on embedded microcontrollers, arduino, etc.
> and I was thinking of doing it from the other side (turning a nice-ish
> server into a rock-solid timekeeper)
> Thanks so far everyone. Really impressed that I already managed to get
> 4x replies so quickly :)
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Eric Garner

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