> up (for an 18F452) and need to order a 10 Mhz crystal.  They seem to come
> in two flavors:  serial, and 20pF.   My understanding is that the 20pF is
> the preferred one.  If that is true, is it still necessary to use the two
> caps to ground from the leads???

        Yes, in fact using a serial resonance crystal is not advised for the simple
reason that it will not oscillate at the marked frequency, it will be off a
certain percentage. With the PIC you always need the caps. TTYL

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