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AM437x GPMC Interfacing SD card and NOR flash

Santosh Bongane
Expert 2120 points
Other Parts Discussed in Thread: AM4376

Hi,

At present working on AM4376 processor with this desiging IoT.

i want to interface 20 bit NOR flash SD card on GPMC how to use it or interface it?

also i want to drive few LEDs, in datasheet pin description table open drain pin not available but in note (21) open drain pin mentioned 

what are the open drain pins in Am4376

  • 0
    TI__Guru**** 393215 points

    Hi,

    Santosh Bongane said:
    i want to interface 20 bit NOR flash SD card on GPMC how to use it or interface it?

    What is this "20 bit NOR flash SD card"? If you mean that you want to switch between GPMC mode and MMC mode on these pins at runtime, this is highly undesirable, because the pin remains in an undefined state for several nanoseconds when switching the pinmux, and anything can happen in this moment.

    Santosh Bongane said:
    what are the open drain pins in Am4376

    There are no open drain pins on AM437x. You should use external transistors.