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  1. [Teensy 4.1] After reset, After reset, SD card becomes slow.

    When the first power is applied and the SD card is initialized, S18A responds with 1 in response to ACMD41. So it can be converted to 1.8V.
    In this case, since the 1.8V interface is used,...
  2. The former is what I want. Thank you for answer....

    The former is what I want.
    Thank you for answer.
    I will try to develop with Baremetal, not Arduino.
  3. Can I use the Teensy 4.1 as a USB mass storage device?

    Hello,

    I want to use the Teensy 4.1 as a USB mass storage device.
    Is there anywhere I can find these examples?

    Thanks.
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