On 2010-11-17 14:40, Forrest Christian wrote:
>    On 11/17/10 5:47 AM, Michael Rigby-Jones wrote:
>> Have you actually confirmed the voltage on the MCLR pin is 3.3v under
>> normal operation? e.g. no excessive leakage currents pulling the voltage
>> down close to logic 0 threshold?
> I'm about 99% sure the answer to this is yes...  but will have to double
> check tomorrow..
>
> The good news as far as testing goes is that this board seems to be
> locking up every 2-3 hours.  So after 3-4 lockups, I've jumpered across
> the resistor (I.E. inserted a 0K resistor in it's place ;) and we'll see
> how long it runs in that configuration.
>
> The even better news is that if this turns out to be the cause of the
> instability that I likely can release a firmware update (these are field
> upgradeable) that reprograms the configuration registers
> (self-reprogrammable on the 'K20) to use that pin as an input not a
> reset...
>

And you do have a programmer that supports "internal-MCLR" ?
Or maybe you are using a bootloader. And maybe that isn't
an issue with these newer PICs... :-)




> -forrest
--=20
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