Dan, Kelly mentioned Microchip's app note (AN588) which is a
good source of info. In the last five years running PICs at 20MHz
in the HS mode using a parallel resonant crystal with a maximum
drive level of >= 1mw, I've never needed the resistor.

   - Tom

At 09:48 AM 2/26/00 -0700, Dan Michaels wrote:
>I'm almost afraid to ask this [given the recent thread about
>using a series R1 in the MCLR line], but what are sentiments
>about using a series R between the xtal and OSC2 for hi-speed
>operation?
>
>Some people swear by them (eg, SimmStick), but my new Scenix
>SX28-52 eval board, operating with whopper 50Mhz xtal, doesn't
>use one.
>
>I figure [possibly wrongly] that higher speed xtals are
>built to handle higher oscillator currents. Can anyone point me
>at info that specifically deals with this issue?
>
>- Dan Michaels
>Oricom Technologies
>http://www.sni.net/~oricom


------------------------------------------------------------------------
Tom Handley
New Age Communications
Since '75 before "New Age" and no one around here is waiting for UFOs ;-)