Problem with Hynix HY27UF081G2A 1Gb NAND flash?
ricard.wanderlof at axis.com
Mon Sep 22 05:58:26 EDT 2008
On Mon, 22 Sep 2008, Ricard Wanderlof wrote:
> On Fri, 19 Sep 2008, Enrico Scholz wrote:
>> 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.
Sorry, I was wrong, we do share the bus with the RAM (mixed up two designs
here). Did you only see the problem with page read operations, or was it a
general problem. We don't even seem to get by the ID read stage.
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
"With Free Software you are employing the best programmers on the planet"
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