MultiMediaCard System
MultiMediaCard System Specification Version 3.31 Official Release (c) March 2003 MMCA 5
Table Of Contents
1 General Description ..........................................................................................................11
2 System Features ................................................................................................................ 13
3 MultiMediaCard System Concept .................................................................................. 15
3.1 Card Concept ...................................................................................................................... 18
3.1.1 Form Factors .................................................................................................................................... 19
3.2 Bus Concept ........................................................................................................................ 20
3.2.1 Bus Lines ......................................................................................................................................... 20
3.2.2 Bus Protocol ..................................................................................................................................... 21
3.3 Controller Concept ............................................................................................................. 24
3.3.1 Application Adapter Requirements .................................................................................................. 25
3.3.2 MultiMediaCard Adapter Architecture ............................................................................................ 25
4 MultiMediaCard Functional Description ....................................................................... 29
4.1 General ............................................................................................................................... 29
4.2 Card Identification Mode ...................................................................................................30
4.2.1 Card Reset ........................................................................................................................................ 30
4.2.2 Operating Voltage Range Validation ............................................................................................... 30
4.2.3 Card Identification Process .............................................................................................................. 32
4.3 Interrupt Mode .................................................................................................................... 32
4.4 Data Transfer Mode ............................................................................................................ 34
4.4.1 Data Read ......................................................................................................................................... 35
4.4.2 Data Write ........................................................................................................................................ 37
4.4.3 Erase ................................................................................................................................................. 39
4.4.4 Write Protect Management .............................................................................................................. 39
4.4.5 Card Lock/Unlock Operation ........................................................................................................... 40
4.4.6 Application specific commands ....................................................................................................... 42
4.5 Clock Control ..................................................................................................................... 43
4.6 Error Conditions ................................................................................................................. 43
4.6.1 CRC and Illegal Command .............................................................................................................. 43
4.6.2 Read, Write and Erase Time-out Conditions ................................................................................... 44
4.6.3 Read ahead in Stream and multiple block read operation ................................................................ 44
4.7 Commands .......................................................................................................................... 45
4.7.1 Command Types .............................................................................................................................. 45
4.7.2 Command Format ............................................................................................................................ 45
4.7.3 Command Classes ............................................................................................................................ 45
4.7.4 Detailed Command Description ....................................................................................................... 46
4.8 Card State Transition Table ................................................................................................52
4.9 Responses ........................................................................................................................... 53
