Kyrre Aalerud wrote:
>>> If I send 10 volts in one of the comparator inputs of a 16F62x, will
>>> it work and clamp it to VDD?
>>
>> If it did, it wouldn't be 10V.  10V is way above the absolute maximum
>> rating for those inputs, so you should expect it to cause serious
>> damage.
>>
>>> Will it allow a current to flow or will it still be high impedance?
>>
>> Probably lots of current for a short time.  No guarantees after that.
>
> It didn't cause damage, but the pin did conduct.  About 25mA wendt
> through. The port is fine and everything seems to work as usual.

You are seriously trying to tell me that you held the pin at 10V with Vdd
at 5V and it only drew 25mA with no damage!!?  Something in this statement
is clearly incorrect, considering how an undamaged PIC has a diode from
the pin to Vdd.

I'm guessing that the 10V wasn't.  This could be explained if you're 10V
really had 180ohm or so in series with it.  Of course that means the 10V
claim is incorrect because the PIC pin will have only been 700mV or so
above Vdd.


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