Max Yang

Securing & Unsecuring HCS12 (E256) Flash, using AN2880SW

Discussion created by Max Yang on May 22, 2007
Latest reply on May 24, 2007 by kef
Hi all,
I'm trying to AN2880SW, it's for DP256 series, and I revised it that can be adapted for E256 serise.
But there is a question I need to clarify.
Does E256 support function of unsecuring Flash via backdoor key?
If yes, AN2880 doesn't seem to work.

I've traced source code, named an2720.asm. When program runs into this section and set KEYACC,
KEYACC is still 0. That will casue unsecuring to be failed.
Did I lose something?

Outcomes