Gordon,

I haven't look up the 12C671 datasheet in particular, but in general you
cannot program a location in a code-protected chip.

However, if you do the following:

1: Burn in your program.

2: Run the calibrartion test

3: Compute the calibration constant(s)

4: Burn the constants into unused memory locations ($FF)

5: Set the code-protect bit

Then you can get the effect you are looking for.

Bob Ammerman
RAm Systems


\----- Original Message -----
From: "Gordon Varney" <gordonv@IAMNEE.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, June 05, 2002 4:07 PM
Subject: [PIC]:adding a value to rom


> Is it possible, and how is it possible.
>
> I have a PIC12C671, The part will be programmed, I would like to run a
calibration sequence on a function, then store
> the calibrated value in the rom of the part. If it had EEprom, then no
problem. Can I write over a protected rom space
> that I know is not used with a new value? Or, do I have to do the new ORG
procedure and reprogram the part.
>
> Gordon Varney
> www.iamnee.com
>
> --
> http://www.piclist.com hint: To leave the PICList
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>
>
>

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