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PICList Thread
'Bondout Chip'
1999\10\20@112812 by Todd Peterson

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Greetings all,

Our ICEPIC II in-circuit emulator seems to have developed a new "feature".
RB5 seems to not be able to drive high or low.  If externally pulled high,
the emulator software indicates the pin is high, otherwise when a high is
written the emulator software still says the pin is low.  Pulled high with a
4.7K, it cannot pull itse;f low, either.  I suspect static damage to the the
bondout chip, PIC16C01-ME.  Does anyone have any experience in repairing
ICEPIC daughterboards?  The system diagnostics program tests all OK, so I
suspect it is the output driver of this chip.  Is Microchip the only source
for 16C01-ME's?

Thanks for any and all assistance!

Todd Peterson
E-Lab Digital Engineering, Inc.

  (816) 257-9954  FAX: (816) 257-9945
  http://www.elabinc.com

1999\10\20@150722 by Richard Prosser

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The same thing happened to me with port RC2. But it was the 16C77-ME that
was damaged. I traced the output pin back through daughterboard to figure
out which chip was faulty. Apparently the 16C01-ME is the more commonly
damaged.
Avnet (locally) managed to get a replacement out of their Singapore office
but it took about 3 weeks.
They were generous enough to make it no charge but then we do spend a lot of
money with them!
Replacing the part is a piece of cake - just take the normal static
precautions.

Richard P

> {Original Message removed}

1999\10\20@152002 by l.allen

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TODD wrote

> Greetings all,
>
> Our ICEPIC II in-circuit emulator seems to have developed a new "feature".
> RB5 seems to not be able to drive high or low.  If externally pulled high,
> the emulator software indicates the pin is high, otherwise when a high is
> written the emulator software still says the pin is low.  Pulled high with a
> 4.7K, it cannot pull itse;f low, either.  I suspect static damage to the the
> bondout chip, PIC16C01-ME.  Does anyone have any experience in repairing
> ICEPIC daughterboards?  The system diagnostics program tests all OK, so I
> suspect it is the output driver of this chip.  Is Microchip the only source
> for 16C01-ME's?
>

Our ICEPIC II has low level clock noise on some of the i/o lines,
traced it back to a bondout chip but since we were in the process of
ordering an MPLAB-ICE we have just left it, causes a hassle if one
buffers the output, the effect gets amplified and starts becoming
'valid' digital levels.
So we didn't fix it, just coped with it.


_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand
_____________________________

1999\10\20@225022 by adastra

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I just had exactly the same problem.  I first called RF Solutions (maker of
the ICEPIC), and they said it was almost certainly the 16C02-ME chip.  They
said they were prone to fail due to ESD, and thet they were not under
warranty.  I needed to get going so I ordered it from them at a cost of 49
pounds (about $80 US) and gave them my credit card and FEDEX number.  When
it didn't show up in a couple of days I called Microchip, and they replaced
it for free, asking only that I send back the failed part. I cancelled the
order with RF Solutions (by FAX) but the cancellation has not yet been
acknowledged, so I don't know what their posture on this will be.  MC was
great, though!

> {Original Message removed}

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