Datasheet

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Table Of Contents
datasheet SD Card
Rev. 1.0
MMBTFxxGWBCA-xMExx
1.0 INFORMATION...........................................................................................................................................................4
2.0 PRODUCT LINE-UP...................................................................................................................................................4
3.0 INTRODUCTION ........................................................................................................................................................5
3.1 General Description................................................................................................................................................. 5
3.2 System Features ..................................................................................................................................................... 5
3.3 System Block Diagram ............................................................................................................................................ 5
4.0 PRODUCT SPECIFICATION......................................................................................................................................6
4.1 Current Consumption .............................................................................................................................................. 6
4.2 System Performance............................................................................................................................................... 6
4.2.1 Product Performance & Speed Class Information ............................................................................................ 6
4.2.2 Read, Write Timeout Error Conditions .............................................................................................................. 6
4.3 SD Mode Card Registers......................................................................................................................................... 7
4.3.1 OCR Register.................................................................................................................................................... 7
4.3.2 CID Register...................................................................................................................................................... 8
4.3.3 CSD Register (CSD Version 1.0)......................................................................................................................9
4.3.4 CSD Register (CSD Version 2.0)...................................................................................................................... 10
4.3.5 RCA Register .................................................................................................................................................... 10
4.3.6 SCR Register .................................................................................................................................................... 11
4.3.7 SD Status Register............................................................................................................................................ 12
4.4 SPI Mode Card Registers........................................................................................................................................ 12
4.5 User Capacity .......................................................................................................................................................... 12
5.0 INTERFACE DESCRIPTION ......................................................................................................................................13
5.1 SD/microSD SD mode Bus Topology / SD/microSD SPI Bus Topology .................................................................13
5.2 Bus Protocol ............................................................................................................................................................ 14
5.2.1 SD Bus.............................................................................................................................................................. 14
5.2.2 SPI Bus ............................................................................................................................................................. 14
5.3 SD/microSD Card Pin Assignment .......................................................................................................................... 14
5.3.1 SD Card Pin Assignment .................................................................................................................................. 14
5.3.2 microSD Card Assignment................................................................................................................................ 15
5.4 Mechanical Specification ......................................................................................................................................... 16
5.4.1 Mechanical Form Factor of microSD.................................................................................................................16
5.4.2 Mechanical Form Factor of SD Card................................................................................................................. 20
5.4.3 Electrical features, Environmental Reliability and Durability ............................................................................. 22
5.5 Electrical Interface................................................................................................................................................... 23
5.5.1 Power Up .......................................................................................................................................................... 23
5.5.2 Reset Level Power Up ...................................................................................................................................... 24
5.5.3 Power Down and Power Cycle.......................................................................................................................... 24
5.5.4 Bus Operating Conditions for 3.3V Signaling.................................................................................................... 25
5.5.4.1 Threshold Level for High Voltage Range.................................................................................................... 25
5.5.4.2 Bus Signal Line Load.................................................................................................................................. 25
5.5.5 Bus Signal Levels.............................................................................................................................................. 26
5.5.6 Bus Timing (Default Mode) .............................................................................................................................. 27
5.5.7 Bus Timing (High-speed Mode) ........................................................................................................................ 28
6.0 SD/MICROSD CARD FUNCTIONAL DESCRIPTION ................................................................................................29
6.1 General.................................................................................................................................................................... 29
6.2 Card Identification Mode.......................................................................................................................................... 29
6.3 Clock Control ........................................................................................................................................................... 29
6.4 Cyclic Redundancy Code ........................................................................................................................................ 29
6.5 Command ................................................................................................................................................................ 29
6.6 Memory Array Partitioning ....................................................................................................................................... 30
6.7 Timings.................................................................................................................................................................... 31
6.8 Speed Class Specification....................................................................................................................................... 31
6.9 Erase Timeout Calculation ......................................................................................................................................31