Re: [PATCH v2 2/2] mtd: spinand: micron: fixing the offset for OOB

Martin Kurbanov
2023-08-22T16:57:20Z

Hi Miquel,

On 22.08.2023 16:35, Miquel Raynal wrote:
> Hi Martin,
>
> mmkurbanov@sberdevices.ru wrote on Tue, 22 Aug 2023 15:25:34 +0300:
>
>> The first 4 bytes are reserved for bad block data.
>
> Are you sure about that? I've never seen 4-bytes BBM.

Yes, I'm sure. I have checked in all the relevant datasheets:
----------------------------------------------------------------------------------
| Name | Max Byte | Min Byte | Area | Description |
| | Address | Address | | |
|--------------------+----------+----------+---------+---------------------------|
| MT29F2G01ABAGD [1] | | | | |
|--------------------| | | | |
| MT29F2G01ABBGD [2] | | | | |
|--------------------| 803h | 800h | | |
| MT29F1G01ABAFD [3] | | | | |
|--------------------| | | | |
| MT29F4G01ADAGD [4] | | | | |
|--------------------+----------+----------| Spare 0 | Reserved (bad block data) |
| MT29F4G01ABAFD [5] | | | | |
|--------------------| | | | |
| MT29F4G01ABBFD [6] | | | | |
|--------------------| 1003h | 1000h | | |
| MT29F8G01ADAFD [7] | | | | |
|--------------------| | | | |
| MT29F8G01ADBFD [8] | | | | |
----------------------------------------------------------------------------------

Note: to view the datasheet on the Micron (https://www.micron.com/) website, you need
to register.

Links:
[1] https://datasheet.lcsc.com/lcsc/1912111437_Micron-Tech-MT29F2G01ABAGDWB-IT-G_C410863.pdf - page 45
[2] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nand-flash/70-series/m79a_2gb_1_8v_nand_spi.pdf - page 46
[3] https://datasheet.lcsc.com/lcsc/2209201030_Micron-Tech-MT29F1G01ABAFDWB-IT-F_C2905686.pdf - page 46
[4] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nand-flash/70-series/m79a_ddp_4gb_3v_nand_spi.pdf - page 46
[5] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nand-flash/70-series/m70a_4gb_3v_nand_spi.pdf - page 47
[6] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nand-flash/70-series/m70a_4gb_1_8v_nand_spi.pdf - page 49
[7] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nand-flash/70-series/m70a_ddp_8gb_3v_nand_spi.pdf - page 48
[8] https://www.micron.com/-/media/client/global/documents/products/data-sheet/nand-flash/70-series/m70a_ddp_8gb_1_8v_nand_spi.pdf - page 48

--
Best Regards,
Martin Kurbanov