> On Wed, 2007-04-04 at 21:50 -0400, Timothy J. Weber wrote:
>> The programming spec for this family says 4.5 V is needed for Bulk
>> Erase, but 2.0 V is sufficient for "read/write operations, program and
>> data memory."  So... does the PICkit2 always do a Bulk Erase?
>
> Sounds like it.
>
>> Any other ideas for ICSP at 3V?  For now I'm pulling it and putting on a
>
> ICD2, works perfectly for me with the 18F and 30Fs at 3.3V.
>


Running a 18LF6722 at 3.3V, I found I could not reprogram it with the
ICD-2 once I set the code protect. We modified our circuit so the PIC gets
its voltage through the programming header, then told the ICD-2 to supply
Vdd, which it does at 5V. Once the chip is programmed, we put a jumper on
the programming header that provides 3.3V to the PIC. At 3.3V, we are
still able to bootload the PIC, just not program it with the ICD-2, due to
the bulk erase issue.

Harold


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