Steve Willoughby wrote:

<<<<<<<<<<<<<<<<<<<<<<<<
I can follow the Microchip datasheets in selecting the appropriate
caps for a crystal or ceramic resonator (or just take the built-in
caps if I get a resonator w/caps), but Microchip says to take care
not to overdrive the crystal/resonator and put a series resistor
between the OSC2 pin and the crystal/resonator "if necessary".

How do I tell if that's necessary, and what value of resistor to
use?
>>>>>>>>>>>>>>>>>>>>>>>>


Perhaps these MCHP docs could help:

AN826, "Crystal Oscillator Basics and Crystal Selection for rfPIC and
PICmicroR Devices"

AN849, "Basic PICmicroR Oscillator Design"

AN943, "Practical PICmicroR Oscillator Analysis and Design"


---
Mike.

_______________________________________________
http://www.piclist.com
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist