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DM3730 with single 512MB NAND

Erwin Groenendaal
Prodigy 100 points
Other Parts Discussed in Thread: DM3730

Hello,

We would like to use 512MB NAND flash with the DM3730 (CUS100 package). According to the datasheet it is possible to address up to 1GB. I even see multiple board with 1 512MB NAND: http://www.technexion.com/images/datasheets/tdm-3730.pdf

The device i want to use is the Micron MT29F4G08ABBEAH4.

However,when I open the reference manual i see this:

It says i can only do 256MB with one chip. Is there a way to avoid this issue? Or cvan the GPMC handle 512?

  • 0
    TI__Guru 65405 points

    Hi Erwin,

    As you can read from the TRM the GPMC on DM3730 can address up to 256 MB on cs0 and cs1. Therefore if you want to use 512 MB NAND it must be on 2 chips each one 256 MB.

    BR

    Tsvetolin Shulev

  • 0 in reply to Cvetolin Shulev-XID
    Prodigy 100 points

    Hello Tsvetolin,


    I know, i saw it in the TRM. However there are multiple other boards which have one single NAND chip with 512MB (Or higher):

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/537/t/207171.aspx

    http://www.technexion.com/images/datasheets/tdm-3730.pdf

    Also, page 26.4.7.4.1 shows the GPMC is compatible with NAND devices up to 64Gb. The TRM shows inconsistency's and therefore I am asking. I am trying on our board now and we only get some minor ECC errors which can (probably) be fixed in software (still checking).


  • 0 in reply to Erwin Groenendaal
    TI__Expert 6735 points

    Erwin:

    The 256 MiB limit on GPMC would be for a memory-mapped peripheral.

    NAND is not memory mapped - it is accessed thru registers in the GPMC module.

    Our current software is limited to 2048-byte page size (64-byte spare and BCH8 ECC.

    MichaelT