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Type: Posts; User: LitterBug

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    Sorry if I was a little thick headed, but I have...

    Sorry if I was a little thick headed, but I have seen the light. :)
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    I think I see the error in my ways after a lot...

    I think I see the error in my ways after a lot more digging.

    I think there is an easy workaround whether or not the vselect signal is output on the intended pin or not. There is nothing stopping...
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    Which is an internal signal handled by the IOMUX.

    Which is an internal signal handled by the IOMUX.
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    The IOMUX is an internal component of the CPU. ...

    The IOMUX is an internal component of the CPU. it is NOT exposed. VSELECT gets set by writing to CMD6. The IOMUX does the the voltage change internally.

    For SDIO cards, the high speed...
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    Those are internal pins on the IOMUXC. Not...

    Those are internal pins on the IOMUXC. Not exposed pins. The voltage selection and change happens inside the CPU via a configuration register.

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    The NXP reference board has the SD VDD wired the...

    The NXP reference board has the SD VDD wired the same to 3.3v, and pretty much the rest of the SD slot for that matter. No level shifter between the CPU and SDcard.
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    The SDCARD SDIO...
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    It is handled internal to the CPU. no external...

    It is handled internal to the CPU. no external hardware is necissary.
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    Just a quick update on my uSDHC / UHS-I / SDR104...

    Just a quick update on my uSDHC / UHS-I / SDR104 findings. People over on the NXP forums have in fact run these iMXRT106x chips successfully at full UHS-1 specifications. There is a register that...
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    From what I'm reading in the CPU specs and...

    From what I'm reading in the CPU specs and manual, That can be done using the SD/SDIO interfaces. Data sheets are here https://www.pjrc.com/teensy/datasheets.html
    High level DataSheet:...
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    These numbers suggest we are using High Speed...

    These numbers suggest we are using High Speed Mode (25 MB/s) 50mhz-4bit clocking and not UHS clocking. Wonder if the hardware can handle at least the slower 100Mhz UHS clock and 50MB/s. I won't beg...
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    I don't have any of the EVO Selects, but I have...

    I don't have any of the EVO Selects, but I have been doing my own playing and bench testing of cards on a 4.1, 1-54B4, with the Built in reader and FIFO_SDIO. All of these cards have worked. I can...
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