Hi:

I recently put together a clock using a Timer1 external oscillator.  I
used a 32.768 kHz crystal.  The program is designed to 'tick' every
two seconds, as the Timer1 buffer overflows.  Unfortunately, the ticks
come every 1.8 seconds, instead.  I thought maybe I'd done something
screwy to the crystal, but the oscilloscope shows it chunking away at
as close to exactly 32.768 kHz as I can measure on it.  (i.e. Maybe
not exact, but certainly not 10% off.)

What else can I check?  When the Timer1 overflows, I assume it jsut
keeps counting from zero.  Perhaps this is not correct?  Do I need to
clear the Timer1 buffers explicitly?

Thanks,

-Tom

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tomss at ids.net - 401-861-2831 - 42 Forge Rd, Potowomut, RI 02818 USA