> -----Original Message-----
> From: Jinx [SMTP:joecolquitt@CLEAR.NET.NZ]
> Sent: Thursday, March 06, 2003 9:23 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: PIC12f629 need help with timed sleep.
>
> > The worst case variation (including temperature) is a lot
> > greater than 1-2 seconds in 16. Each period can be as
> > short as 7ms or as long as 33ms, without the prescaler.
> > And that's not tested, but characterized,meaning that a
> > certain percentage of chips will fall outside of that range
>
> My experience with a few PICs has been that WDT is quite
> dependably 18ms at 25C. As you say though, temperature
> is a factor, approximately 0.1s / 5C. Not a good idea to rely
> on WDT for accurate timing unless tested in the actual chip
> used and/or the application can tolerate variations
>
I'm hoping that's  0.1ms? :o)

Mike


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