Off topic but interestingly, my brother in law just bought a rediculously
expensive omega watch, somewhere around the $2.5k mark, and the instruction
book (not just a little brochure mind you, but a hard cover bound volume)
indicates that the expected accuracy is only +/- 40 seconds a day or so...

> -----Original Message-----
> From: D Yates [SMTP:piclist@NERDULATOR.NET]
> Sent: Thursday, December 04, 2003 3:14 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC:] Argh, more crystal questions.
>
> > ----- Original Message -----
> > From: "Keith L. Kovala" <klk@KSU.EDU>
>
> <snip>
> > I'm still not sure whether I want a parallel or series resonant crystal,
> <snip>
>
> It doesn't make any difference unless you're into *very* timing critical
> applications, or into very long term applications where a couple
> instruction
> cycles eventually add up to a significant error.  If you run the pic at
> 20.01mhz instead of 20.00 for an entire day, you'll be off by a total of
> about 45 seconds.  After a month that adds up to over 20 minutes...  and
> after a year to over 4 hours.  It's starting to sound like my watch...
>
> D
>
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