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[FAQ] AM62x: OSPI in SPI mode for booting, MOSI vs. MISO

Robert Finger
Genius 16702 points

Team, 

I found the following post regarding McSPI boot in SPI mode: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1071789/am62x-mcspi-d0-and-d1-direction-in-spi-bootmode

>>> D0 is MISO, and D1 is MOSI.  It is not configurable

Is this the same when booting from OSPI in SPI mode? The TRM is not clear about this. Where can this info be found, which pin is MISO and which MOSI?

Thanks,
  Robert

  • +1
    TI__Guru* 76350 points

    Hi Robert

    For OSPI booting in SPI mode (i will clarify this in the next TRM revision):

    OSPI0_D0:  MOSI, Data transfers FROM the processor TO the flash device

    OPSI0_D1:  MISO, Data transfers TO the processor FROM the flash device

    Note that the McSPI module is a completely different hardware module in the MCU domain and doesn't have boot capabilities.

    Regards,

    James