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GPIO usage of HiFiBerry boards

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    Georg Düsterhöft

    Seems to be a little outdated to me as my HifiBerry DAC+ HW 2.2 doesn't use Pin 38 at all (no connections from or to this pin).

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    HiFiBerry team

    No, this is completely correct. While this pin isn't connected, you can't use it is it is part of the sound subsystem and it is reserved.