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PICList Thread
'32Khz CLOCK'
1995\09\05@074556 by Scott Stephens

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>I'VE GOT A 32768Hz WATCH XTAL CONNECTED TO A PIC84 IT HAS A Rs VALUE
>OF 22k (25K RECOMMENDED BY THE MANUFACTURER) AND TWO 10pF CERAMIC
>CAPS TO GROUND. THE OSCILLATOR OUTPUT ON PIN 15 HAS A PERIOD OF
>4.96uS. IT SHOULD BE 30.517uS SHOULD'NT IT ( IF THE CLOCK OUT IS /4
>THEN THIS WOULD GIVE 122uS ).
>
I used around 100pf capacitors & 10K ohms (but I'm guessing). It works.
Check your oscillator programming fuses (did you tell the PIC its an RC?).
Are you using a breadboard? A year back, I had a nasty problem with the
oscillator malfunctioning depending on what was under the breadboard- my
steel desk changed the capacitance of the circuit.

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