Bob Blick wrote:

> Apparently Microchip documentation for electrical specification
> continues to live up to its (not so good) reputation.

Hi Bob,

Yes, I can see how the data sheet can confuse people since at one point
Microchip uses the phrase "recommended values" and then they state that the
user should consult the specifications of the crystal manufacturer:

"Recommended values of C1 and C2 are identical to the ranges tested table."

"These values are for design guidance only....Since each crystal has its own
characteristics, the user should consult the crystal manufacturer for
appropriate values of external components."

But the second quote above really sums it all up and drives the point home
to follow the specifications of the crystal manufacturer. Bob, here's a link
I forgot to give you in my last post that should be applicable to you:

Application Note for Fox Tuning Forks by Louis Bradshaw

http://foxonline.com/appnotes.htm


I could not agree with David VanHorn more. There's definitely a lot of
theory involved with crystals and it's sometimes easy to take these great
devices for granted.

Best wishes with your project Bob.


Best regards,

Ken Pergola

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