Re: cfi 0001

Nicolas Pitre
2006-03-21T15:56:33Z

On Tue, 21 Mar 2006, Tomas wrote:

> Hi,
>
> There are 2 things that I didn't expect:
>
> First that the flash allways seems to be in non-readable
> state after a write. It will not change state until a read
> is performed. This might be by design for performance?

Yes it is by design.

> The second thing is that it whole flash is put
> into a non-readable state in a write operation.
> I have partition the flash in several partition
> by using physmap. I don't know how the cfi flash
> works but shoudn't it be possible to work on sector basis?

No. Those partitions are only logical partitions. Most NOR flash parts
are entirely unreadable when operations are performed on them.

Nicolas