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USB Superspeed Peripherals

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Just got the Benicia DVK yesterday and have a big question about PMMC, the reason to use Benicia is because it has build-in eMMC 4.41 host controller, that means I can issue COMMAND to access eMMC instead of read/write only, but from datasheet, PMMC is activate when connecting to a application processor with eMMC host. But if I already had eMMC host on the host AP, why I still need an additional Benicia to access eMMC?? Is it possible: MMC_D0 - MMC_D7/ MMC_CLK / MMC_CMD connect to eMMC device and then use PMMC interface to access eMMC device?


Thank you!

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