On Sun, 22 Jun 2003 16:56:13 +0200, Kyrre Aalerud <kreature@C2I.NET>
wrote:

>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.  This was too bad
>though as I now need to clamp the FET-voltage before feeding it to the
>comparator.  (I was trying to check for over-current without external
>OP-AMPS...)
>

The port may appear to be fine but you could have blown the clamp
diode and not know it. I've got no data to back this up but 25mA
sounds like a lot of current for a clamp diode.

I'd suggest testing that pin for proper clamping with a
current-limited variable voltage source. If the clamp diode's blown,
it won't limit the voltage properly and further damage to the chip
could result later.


Regards, Bob

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