Did you set the configuration fuses for the RC mode?



At 12:33 PM 7/5/02 +0930, you wrote:
>Hi Folks
>Just trying to see what can be done with a 16F87A, I tried to kick it over
>with an RC oscillator as described in the various MicroChip appnotes.
>(Resistor from supply to oscillator pin, capacitor from pin to ground)
>I can't seem to get it going. It starts OK with all the crystals I have,
>anywhere between a couple of hundred KHz, all the way out to 16MHz, but not
>with a resistor-capacitor pair. I have tried 40pf/5K (5MHz), 20pf/5K
>(10MHz), 40pf/6.2K (4MHz) plus other combinations that are equally
>reliable - in that they don't start!
>I am doing this on a breadboard, so I guess there is plenty of stray
>capacitance - is this the problem. - ? Suggestions, comments, abuse ...
>
>Peter L
>
>First posting here, so please excuse if this has been covered a million
>times already. (I can't find anything helpful in archives).
>
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Larry G. Nelson Sr.
mailto:L.Nelson@ieee.org
http://www.ultranet.com/~nr

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