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Fine tune GPMC timing on AM3894

Other Parts Discussed in Thread: AM3894

Hi all,

I used NAND flash(MT29F32G08CBADAWP-D) on AM3894. I referred TRM into GPMC chapter to know the calculations in each registers of GPMC_CONFIG1_i - GPMC_CONFIG7_i .

After that I could R/W the NAND flash successfully. But I still encountered Inconsistent R/W result when I did the stress test. 

Here was my GPMC registers setting.

==============================

GPMC_CONFIG1_1: 0x00000800

GPMC_CONFIG2_1: 0x00161600

GPMC_CONFIG3_1: 0x00161600

GPMC_CONFIG4_1: 0x150A0F7F

GPMC_CONFIG5_1: 0x0F1F1F1F

GPMC_CONFIG6_1: 0x1F000F0F

GPMC_CONFIG7_1: 0x00000C44

==============================

Did TI have the GPMC timing spreadsheet for this support? I was afraid my calculation had the margin of errors.

Thanks in advance.

B.R.

OC

  • Hi OC,

    OC said:
    Did TI have the GPMC timing spreadsheet for this support?

    No, I can not find such spreadsheet.

    I was able to find the below wiki page:

    http://processors.wiki.ti.com/index.php/Tips_for_configuring_OMAP35x,_AM35x,_and_AM-DM37x_GPMC_registers

    Also below wiki pages show the performance:

    http://processors.wiki.ti.com/index.php/TI81XX_PSP_04.04.00.01_Feature_Performance_Guide#NAND_Driver

    http://processors.wiki.ti.com/index.php/TI81XX_PSP_04.04.00.02_Feature_Performance_Guide#NAND_Driver

    And some e2e threads that might be in help:

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/99/t/168062.aspx

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/187690.aspx

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/185451.aspx

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/169220.aspx

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/191923.aspx

    Regards,
    Pavel