3.15.3. Card interface description

Figure 3.33 shows the memory card interface.

Table 3.14. MMC signals

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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