>I've found the DigiKey resonators (ECS I think) to work great at 4MHz and
>10MHz and not at all at 20MHz.  Haven't tried other frequencies; any idea
>what the problem at 20MHz is?

We've tested this extensively about 6 months ago.  It seems as though the
Murata brand are the only type which will work with PICs at 20MHz.  The
others are not efficient enough to resonate with the circuitry inside a PIC,
even on HS.   Last I checked the other companies were working on a version
to work with the PIC; anyone heard any new news on this?

-Todd Peterson
E-Lab Digital Engineering, Inc.  (816) 257-9954

EDE300 IC -  PC Interface IC
EDE700 IC -  Serial to LCD Interface IC
EDE1200 IC - Stepper Motor Controller
EDE1400 IC - Serial to Parallel-Printer IC

http://www.elabinc.com