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PROCESSOR-SDK-AM335X: SD card emulation

Part Number: PROCESSOR-SDK-AM335X

Hi,

I'm trying to emulate an SD card (long story) -- heres the diagram:

I'm fairly sure I need an FPGA but I was wondering if its possible to use the AM335x?

SDIO on the AM335x is most likely host only, can't be used as a slave what about the GPIOs? They can't toggle faster than 208 MHz (which is necessary for the highest speeds SDR104, 104 MB/s, 208 MHz), what about slower speeds like 100 MHz or 50 MHz?

  • Hi,

    No, you will not be able to achieve this with a Sitara processor. One factor is that all MMC interfaces are Host controllers. Another is that GPIO toggle is not realistic at the frequencies you mention. The PRU units can toggle GPIOs at about 50MHz, but that is an absolute maximum, without any software overhead.