Fw: corrupt my NAND flash device
Alex Samoutin
samoutin at hotbox.ru
Wed Apr 30 12:54:48 EDT 2003
Hi Thayne,
>I'm jumping in because I have some chips that appear to be broken - they
>occasionally drop operations (erase/write)
> When a command is
>"dropped" it seems to always succeed when sent a second time (don't have
>any examples that failed on the second try). I'm interested because
>your situation seems to be related. Is the problem that the chip
>sometimes ignores a command? Does your retry fix things?
Yes I had absolutely the same problem. Some times first write command was
ignored, but second always successful. However I have no problem with erase
operations, only write some times was ignored.
(For Thomas) It’s not a bad H/W or incorrect timing. I’ve played with timing
and result was the same. Also I have 5 boards with Toshiba NAND chip and 2
of them are working fine without retry, but other 3 need retry for normal
operation.
Alex.
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