资料里是这样说的
Data bytes on both MOSI and MISO lines are sent with the MSB first. Data on both MOSI
and MISO lines must be stable on the rising edge of the clock and can be changed on the
falling edge. Data is provided by the MFRC522 on the falling clock edge and is stable
during the rising clock edge.
然后就是那个图，可是这段话看的我很不解啊。。。
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