Sounds like you have a canned oscillator, not a Xtal.  2 of the 4
     leads should be Vdd/Vss and another is OSCOUT.  Connect this line to
     CLK1/OSCIN on the PIC and use XT mode for oscillator mode.  You cannot
     use RC mode.

     Rgds, Brian.


______________________________ Reply Separator _________________________________
Subject: Using Oscillator w/ PIC
Author:  Mike Goelzer <mgoelzer@US.NET> at Internet_Exchange
Date:    11/27/95 3:39 PM


        I'm a bit embarassed to admit this, but all the PIC projects I've
ever done have used RC oscillators.  Now I want to get more accurate timing,
so I ordered a 4.00Mhz oscillator from Mouser.  It is a little metal package
with four pins coming out.   Can anyone tell me how to connect this thing
to clock the PIC (I've never used a crystal before, as is probably plainly
obvious)?

Thanks.

-mike
--
Mike Goelzer
<mgoelzer@us.net>