4.3.7.5 Commands Accepted for Locked Card ................................................................................. 28
4.3.7.6 Two Types of Lock/Unlock Card............................................................................................ 29
4.3.8 Content Protection ................................................................................................................29
4.3.9 Application-Specific Commands............................................................................................29
4.3.9.1 Application-Specific Command – APP_CMD (CMD55)......................................................... 29
4.3.9.2 General Command - GEN_CMD (CMD56)........................................................................... 30
4.3.10 Switch Function Command.................................................................................................31
4.3.10.1 General............................................................................................................................... 31
4.3.10.2 Mode 0 Operation - Check Function ................................................................................... 32
4.3.10.3 Mode 1 Operation - Set Function........................................................................................33
4.3.10.4 Switch Function Status........................................................................................................ 35
4.3.10.4.1 Busy Status Indication for Functions ............................................................................ 36
4.3.10.4.2 Data Structure Version ................................................................................................. 37
4.3.10.4.3 Function Table of Switch Command............................................................................. 37
4.3.10.5 Relationship between CMD6 data & other commands ....................................................... 38
4.3.10.6 Switch Function Flow Example ...........................................................................................38
4.3.10.7 Example of Checking.......................................................................................................... 38
4.3.11 High-Speed Mode (25 MB/sec interface speed)..................................................................39
4.3.12 Command System...............................................................................................................39
4.3.13 Send Interface Condition Command (CMD8) .....................................................................40
4.3.14 Command Functional Difference in High Capacity SD Memory Card.................................41
4.4 Clock Control ...............................................................................................................................42
4.5 Cyclic Redundancy Code (CRC).................................................................................................43
4.6 Error Conditions...........................................................................................................................45
4.6.1 CRC and Illegal Command ...................................................................................................45
4.6.2 Read, Write and Erase Timeout Conditions..........................................................................45
4.6.2.1 Read ..................................................................................................................................... 45
4.6.2.2 Write ..................................................................................................................................... 45
4.6.2.3 Erase .................................................................................................................................... 45
4.7 Commands..................................................................................................................................46
