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DM8148 GPMC

Madhura Shetty
Intellectual 810 points

Hi,

We are using DM8148 in our design. The plan is to use GPMC lines to excess the external device.The confusion is to go with multiplexed scheme or non-multiplexed scheme. (If we go with multiplexed mode we can save upto 16 pins in the external device which is a great help for us). if we go with multiplexed mode what are the limitations?

What is the bandwidth usage in each case ?

Also is it possible to share the timing diagram of  GPMC non-multiplexed mode as i could not find it in technical reference module ?

Thanks & Regards

Madhura Shetty

  • 0
    TI__Guru**** 170625 points
    Hi Madhura,

    Regarding bandwidth, we have performance test for NAND and NOR flash, see below wiki pages:

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

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

    Regarding timing diagram, see DM814x datasheet (SPRS647E), section 8.8.2 GPMC Electrical Data/Timing

    BR
    Pavel