Re: mtd: nand: lock unlock function

Zhi Li
2014-11-06T03:31:40Z

On Wed, Nov 5, 2014 at 8:32 PM, bpqw <bpqw@micron.com> wrote:
>> Yes, we recently met a problem with micron flash. Need send unlock
>> command.
>> The datasheet I get from micron
>> MT29F8G08ABACA, MT29F8G16ABACA, MT29F8G08ABBCA, MT29F8G16ABBCA,
>> MT29F16G08ADACA, MT29F16G16ADACA, MT29F16G08ADBCA , MT29F16G16ADBCA
>
> Hi Zhi,
> There is a LOCK# pin for Micron NAND flash device, lock feature is disabled
> if you leave this LOCK# pin low or unconnected. Only when you pull high this
> LOCK# pin, all NAND flash blocks are locked after power on, users need to send
> Unlock command to unlock blocks.
> Can you help descript what problem you met?

Yes, that's exact problem. Our board design connect LOCK# to VCC wrongly.

>
> Thanks