SanDisk SD Card

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Revision 2.2SanDisk SD Card Product Manual5.5 Data Write...............................................................................................5-35.6 Erase and Write Protect Management.....................................................5-45.7 Read CID/CSD Registers .......................................................................5-55.8 Reset Sequence.......................................................................................5-55.9 Clock Control .........................................................................................5-55.10 Error Conditions ....................................................................................5-65.11 Memory Array Partitioning....................................................................5-75.12 Card Lock/Unlock .................................................................................5-75.13 Application-specific Commands............................................................5-75.14 Copyright Protection Commands...........................................................5-75.15 Switch Function Command ...................................................................5-75.16 High-speed Mode (25MB/sec interface speed)......................................5-75.17 SPI Command Set..................................................................................5-85.18 Responses ............................................................................................5-125.19 Data Tokens .........................................................................................5-145.20 Data Error Token .................................................................................5-155.21 Clearing Status Bits .............................................................................5-155.22 Card Registers......................................................................................5-175.23 SPI Bus Timing Diagrams ...................................................................5-175.24 Timing Values......................................................................................5-195.25 SPI Electrical Interface........................................................................5-205.26 SPI Bus Operating Conditions.............................................................5-205.27 Bus Timing ..........................................................................................5-20Appendix A Ordering Information...............................................................A-1Appendix B SanDisk Worldwide Sales Offices........................................... B-1Appendix C Limited Warranty..................................................................... C-1Appendix D Disclaimer of Liability ............................................................D-1Appendix E Application Note...................................................................... E-1© 2004 SanDisk Corporation iii
Revision 2.2Chapter 1 – IntroductionSanDisk SD Card Product Manual1 Introduction1.1 General DescriptionThe SanDisk Secure Digital (SD) Card is a flash-based memory card specifically designedto meet the security, capacity, performance and environmental requirements inherent innext generation mobile phones and consumer electronic devices. The SanDisk SD Cardincludes a copyright protection mechanism that complies with the security of the SDMIstandard, and is faster and capable of higher memory capacity. The SD Card securitysystem uses mutual authentication and a “new cipher algorithm” to protect against illegalusage of the card content. Unsecured access to the user‘s own content is also available. Thephysical form factor: pin assignment and data transfer protocol, with some additions, areforward compatible with the SD Card.SanDisk SD Card communication is based on an advanced nine-pin interface (clock,command, 4xData and 3xPower lines) designed to operate in a low voltage range. Thecommunication protocol is defined as part of this specification. The SD Card host interfacesupports regular MultiMediaCard operation as well. In other words, MultiMediaCardforward compatibility was kept. The main difference between the SD Card andMultiMediaCard is the initialization process. Matsushita Electric Company (MEI), ToshibaCorporation, and SanDisk Corporation defined the SD Card Specification originally.Currently, the Secure Digital Association (SDA) controls the specifications. The SanDiskSD Card was designed to be compatible with the SD Card Physical Specification.The SD Card Interface allows for easy integration into any design, regardless ofmicroprocessor used. For compatibility with existing controllers, the SanDisk SD Cardoffers, in addition to the SD Card Interface, an alternate communication protocol based onthe SPI standard.Currently, the SanDisk SD Card provides up to 1024 million bytes of memory using flashmemory chips, which were designed especially for use in mass storage applications. Inaddition to the mass storage specific flash memory chip, the SD Card includes an on-cardintelligent controller which manages interface protocols, security algorithms for copyrightprotection, data storage and retrieval, as well as Error Correction Code (ECC) algorithms,defect handling and diagnostics, power management and clock control.Figure 1-1SanDisk SD Card Block DiagramSD Bus/SPI BusInterfaceSanDiskSingle ChipControllerData In/OutControlFlashModulesSanDisk SD Card© 2004 SanDisk Corporation 1-1 12/08/04
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