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MSP432E401Y: Bit-Banging interface for communication with external eMMC storage

Tyler McKean
Prodigy 80 points
Part Number: MSP432E401Y


Hello, I've been looking for ways to communicate via hardware with a MSP432E401Y and an eMMC, but it seems the SPI on the MCU isn't an option because the JEDEC protocol has made the SPI for eMMC obsolete with the newer versions of eMMC. So, I've seen bit-banging floated around as an option to write the interface between MCU and eMMC as a software option. Does anyone have any resources with getting started on this process? I have all the documents for the eMMC protocol. Any help on writing the software in CCS or providing additional documentation would be greatly appreciated! Thanks

Cheers,

TM

  • 0
    TI__Mastermind 39775 points

    Sorry, for MSP432E, it doesn't have a software SPI code. I think you can move a such function to MSP432E as well. The most difficult thing is the communication speed. If you want to make it faster, you need to choose register level C code or even the assembly code to realize it.

  • 0
    Guru 100365 points

    I haven't kept up with the advances in SD/MMC, but I thought the quad-SPI implemented in the E-series QSSI is the same as that used by at least some SD cards. Is this not the same as the JEDEC protocol?