3.15.3. Card interface description

Figure 3.33 shows the memory card interface.

Table 3.14. MMC signals

SignalDescription
MCIPWREnables supply voltage to card
MCIxCMDCommand selection
CARDINCard detect signal. Read the current state from bit 1 of GPIO2.
MCIxDAT[3:0]Card data bus
WPROTWrite protection indication. Read the current state from bit 0 of GPIO2.
MCICLKClock to card

See MMC and SD flash card interface for details of the MMC/SD card socket and pin numbering.

See also MultiMedia Card Interface, MCI and the ARM PrimeCell Multimedia Card Interface (PL180) Technical Reference Manual.

Figure 3.33. MCI interface

MCI interface

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