> Someone suggested the next time I put something in an OTP device, I make
the
> ORG higher so I can later reburn the lower region and overwrite the reset
> area with the new lower ORG as long as the new ORG only has bits changing
> from 1 to 0 in the number so that they can be burned and updated.
>
> Does this work, or is it a nice fairy tale?  I would first think the
> picstart would yell at me that it's not a blank device even if I
technically
> can burn the untouched 1's sitting in the OTP.

no problem to do it with PICs
I'm doing this permanently - sometimes forget to set the right fuses,
sometimes change constants.
PICSTART will warn you, but will ateampt to program and if you didn't set
the security fuse everythink will be OK.

Regards
Tsvetan
---
PCB prototypes for $26 at http://run.to/pcb

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