Hi All:

   I'm just starting out with PIC's, and have breadboarded
a 16F877 with an oscillator composed of a 4Mhz parallel-cut crystal, and
15pf caps.  When I scope out OSC1 and OSC1, I don't see any
oscillation.  I've tried a range of caps from 12 to 33pf.

   The 16F877 is straight from the distributor - completely
unprogrammed, since I haven't built a programmer yet.  ;-)

   My question is:  Should I be seeing oscillation under these
conditions?  Or do the configuration fuses need to be programmed first,
before the oscillator will start?

   It will be a couple of days before I have a programmer, so I'm
curious whether I'm simply missing some other important factor, or if
this is the default behavior with an unprogrammed PIC.

Thanks,
   - Rich



--
Richard Mulvey <rich@mulveyfamily.com>

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