> If we lost power during a flash block erase on a traditional CFI NOR flash
> (e.g. S29AL032D) what would the resulting bit pattern likely look like? I
> know that the erase operation flips all bits to 1 so would it be possible to
> see an occasional 0 in a sea of 1s? Or would we see successive 0xFFs up to
> some point and then the previous content in the higher addresses?
I don't know for certain but expect that the block is erased in parallel,
so that you could see some, but not all bits changed from 0 to 1. More
worrisome is that some of the erased bits may be barely erased, susceptable
to misreading later.
You could run an experiment of interrupting erasures and looking at memory.
--
Thad
Reply by andrew queisser●July 28, 20082008-07-28
If we lost power during a flash block erase on a traditional CFI NOR flash
(e.g. S29AL032D) what would the resulting bit pattern likely look like? I
know that the erase operation flips all bits to 1 so would it be possible to
see an occasional 0 in a sea of 1s? Or would we see successive 0xFFs up to
some point and then the previous content in the higher addresses?
Thanks,
Andrew