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Hi,
i am having issues with getting a UHS-I card to run in SPI high speed mode (50MHz). I have a older class 4 card that works fine on 50MHz but the UHS-I card does not work. According to the simplified SD specs 3.9.1 a UHS-I card must support high speed mode. But cmd6 always returns an error when querying for high speed mode.
My initialization routine:
CMD0
CMD8
CMD58
ACMD41
CMD6
This always fails on the UHS-I cards i tried (Transcend 16GB & Sandisk 16GB). While the older card switches to high speed mode no problem.
Does anyone have a clue why this doesnt work?
i am having issues with getting a UHS-I card to run in SPI high speed mode (50MHz). I have a older class 4 card that works fine on 50MHz but the UHS-I card does not work. According to the simplified SD specs 3.9.1 a UHS-I card must support high speed mode. But cmd6 always returns an error when querying for high speed mode.
My initialization routine:
CMD0
CMD8
CMD58
ACMD41
CMD6
This always fails on the UHS-I cards i tried (Transcend 16GB & Sandisk 16GB). While the older card switches to high speed mode no problem.
Does anyone have a clue why this doesnt work?
