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Is it possible boot 8bit image on NAND 16 device?

Shino Samuel
Intellectual 970 points
Other Parts Discussed in Thread: OMAPL138

Hi 

Is it possible boot 8bit image on NAND 16 device? We are using Micron 8bit and 16bit devices (MT29F4G16ABBDAHC-IT)  on our platform. If it works it will be useful to use same code on both devices.

Regards,

  • 0
    TI__Guru** 116100 points
    Samuel,
    No. We are not able to boot 8bit image on 16bit NAND flash because NAND initialization is different for 8bit & 16bit.
    We have to create separate boot images for 8bit & 16bit in separate 2 different locations.
  • 0 in reply to Titusrathinaraj Stalin
    Intellectual 970 points
    Hi

    I want to know if we use 8 bit timing on the image, can it be possible to operate as if it is 8bit. Is ECC calculation is different for NAND 8 and NAND 16?

    Thanks
  • 0 in reply to Shino Samuel
    TI__Guru** 116100 points
    You would get ECC errors if you run 8bit image on 16bit flash vice versa.,

    Please refer to the following TI wiki.

    http://processors.wiki.ti.com/index.php/NAND_8bit_support
  • 0 in reply to Shino Samuel
    TI__Mastermind 43955 points

    Hi Shino Sameul,

    Shino says said:
    I want to know if we use 8 bit timing on the image, can it be possible to operate as if it is 8bit. Is ECC calculation is different for NAND 8 and NAND 16?

    First of all, yes, it is possible to configure the 16 bit NAND device [ MT29F4G16ABADAH4-IT:D ] to operate it as a 8 bit device provided the configuration like timing parameters are done correctly.

    The EMIFA of OMAPL138 supports 4-bit ECC on 8bit or 16 bit NAND flash. But not sure how much effort needed in maintaining the ECC as well not sure on the side effects like reduction in the speed or  pros and cons of doing so..

    Regards,

    Shankari

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