
Slave data in, master data out
Slave data out, master data in
MMC/SD Card Data bit 2SPI Enable
1
MMC/SD Card Data bit 3SPI Enable
0
MMC/SD Card Data bit 0Slave data
out, master data in
MMC/SD command signalSlave
data in, master data out
MMC/SD Output ClockSPI Clock
Received serial dataUART2 Request
To Send
Combined serial clockUART2
Transmit data
Combined frame
synchronizationUART2 Receive
data
Transmitted serial dataUART2 Clear
To Send
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