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Procedures for Common Operations
6.Repeat step 4 and step 5 to identify and retrieve relative addresses from all remaining SD cards until no card responds to the CMD2 command. No card responding within 5 memory clock cycles indicates that all cards have been identified and the MMC card and the identification procedure terminates.
The sequence of events in this operation is shown in Figure 13.
Figure 13. SD Card Identification Procedure
SPRUE30B | Multimedia Card (MMC)/Secure Digital (SD) Card Controller | 31 |