Problem with Hynix HY27UF081G2A 1Gb NAND flash?

[Ricard Wanderlof]

On Fri, 19 Sep 2008, Enrico Scholz wrote:

> Ricard Wanderlof <ricard.wanderlof at axis.com> writes:
>
>> I'm testing the above mentioned NAND flash chip in a design
>> which has previously used the corresponding 1Gb parts from
>> Samsung and Numonyx (ST) without problems. However, with the
>> Hynix chip, mtd won't even read the ID code, it's just as if
>> the chip wasn't there (it fails with
>
> Some Hynix NAND chips seem to have problems with bus arbitration;
> e.g. they continue to shift out data when chipselect is
> deasserted during a operation (e.g. because ethernet controller
> was accessed in this time).  We saw this with HY27UG088G5M on
> PXA320 and read-page operations.

Interesting. We don't have any other devices on the bus that the NAND chip 
is connected to however.

/Ricard
--
Ricard Wolf Wanderlöf                           ricardw(at)axis.com
Axis Communications AB, Lund, Sweden            www.axis.com
Phone +46 46 272 2016                           Fax +46 46 13 61 30
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