Part 1 Physical Layer Simplified Specification …

1 SD Specifications Part 1 physical layer simplified specification Version September 25, 2006 SD Group Matsushita Electric Industrial Co., Ltd. (Panasonic) SanDisk Corporation Toshiba Corporation Technical Committee SD Card Association Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version i Revision History Date Version Changes compared to previous issue April 3, 2006 Physical Layer Simplified Specification Version initial release. (Supplementary Notes is applied.) September 25, 2006 Physical Layer Simplified Specification Version Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version ii Conditions for publication Publisher: SD Card Association 2400 Camino Ramon, Suite 375 San Ramon, CA 94583 USA Telephone: +1 (925) 275-6615, Fax: +1 (925) 886-4870 E-mail: Copyright Holders: The SD Group Matsushita Electric Industrial Co.

2 , Ltd. (Panasonic) SanDisk Corporation (SanDisk) Toshiba Corporation (Toshiba) The SD Card Association Notes: The copyright of the previous versions (Version and ) and all corrections or non-material changes thereto are owned by SD Group. The copyright of material changes to the previous versions (Version ) are owned by SD Card Association. Disclaimers: The information contained herein is presented only as a standard Specification for SD Card and SD Host/Ancillary products. No responsibility is assumed by SD Card Association for any damages, any infringements of patents or other right of the third parties, which may result from its use.

3 No license is granted by implication or otherwise under any patent or rights of SD Group and SD Card Association or others. Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version iii Conventions Used in This Document Naming Conventions Some terms are capitalized to distinguish their definition from their common English meaning. Words not capitalized have their common English meaning. Numbers and Number Bases Hexadecimal numbers are written with a lower case h suffix, , FFFFh and 80h. Binary numbers are written with a lower case b suffix ( , 10b). Binary numbers larger than four digits are written with a space dividing each group of four digits, as in 1000 0101 0010b.

4 All other numbers are decimal. Key Words May: Indicates flexibility of choice with no implied recommendation or requirement. Shall: Indicates a mandatory requirement. Designers shall implement such mandatory requirements to ensure interchangeability and to claim conformance with the Specification . Should: Indicates a strong recommendation but not a mandatory requirement. Designers should give strong consideration to such recommendations, but there is still a choice in implementation. Application Notes Some sections of this document provide guidance to the host implementers as follows: Application Note: This is an example of an application note. Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version iv Table of Contents 1.

5 General 2. System Features ..3 3. SD Memory Card System Concept ..5 Read-Write Property .. 5 Supply 5 Card Capacity .. 5 Speed Class .. 6 Bus Topology .. 7 Bus Protocol .. 7 SD Bus .. 7 SPI Bus .. 10 SD Memory Card Pins and 11 4. SD Memory Card Functional Description ..12 12 Card Identification 13 Card Reset .. 13 Operating Condition 13 Card Initialization and Identification Process .. 15 Data Transfer Mode .. 17 Wide Bus Selection/Deselection ..19 2 GByte Card .. 19 Data Read .. 19 Data Write .. 20 22 Write Protect Management .. 22 Card Lock/Unlock Operation .. 23 General .. 23 Parameter and the Result of CMD42 .. 25 Forcing Erase .. 27 Force Erase Function to the Locked 27 Relation Between ACMD6 and Lock/Unlock 28 Commands Accepted for Locked Card.

6 28 Two Types of Lock/Unlock 29 Content Protection .. 29 Application-Specific Application-Specific Command APP_CMD (CMD55).. 29 General Command - GEN_CMD (CMD56) .. 30 Switch Function Command ..31 General .. 31 Mode 0 Operation - Check Function .. 32 Mode 1 Operation - Set Switch Function 35 Busy Status Indication for Functions .. 36 Data Structure Version .. 37 Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version Function Table of Switch Command .. 37 Relationship between CMD6 data & other commands .. 38 Switch Function Flow Example ..38 Example of Checking .. 38 High-Speed Mode (25 MB/sec interface speed).. 39 Command 39 Send Interface Condition Command (CMD8).

7 40 Command Functional Difference in High Capacity SD Memory 41 Clock Control .. 42 Cyclic Redundancy Code (CRC) .. 43 Error 45 CRC and Illegal Command ..45 Read, Write and Erase Timeout Conditions .. 45 Read .. 45 Write .. 45 Erase .. 45 Commands .. 46 Command Types .. 46 Command Format .. 46 Command 46 Detailed Command Description .. 49 Card State Transition Table .. 56 58 R1 (normal response command):.. 58 58 R2 (CID, CSD register) .. 58 R3 (OCR register) .. 59 R6 (Published RCA response) ..59 R7 (Card interface condition) .. 59 Two Status Information of SD Memory Card .. 61 Card Status .. 61 SD Status .. 65 Memory Array Partitioning .. 68 Timings .. 68 Speed Class Specification .

8 69 Allocation Unit (AU) .. 69 Recording Unit (RU).. 69 Write Performance .. 69 Read Performance .. 69 Performance Curve Definition ..69 Speed Class Definition .. 69 Consideration for Inserting FAT Update during 70 Measurement Conditions and Requirements of the Speed 70 Erase Timeout 71 Erase Unit .. 71 Case Analysis of Erase Time 71 Method for Erase Large Areas ..72 Calculation of Erase Timeout Value Using the Parameter Registers .. 72 5. Card Registers ..73 OCR 74 Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version CID register .. 75 CSD 77 CSD_STRUCTURE .. 77 CSD Register (CSD Version ) .. 78 CSD Register (CSD Version ).

9 86 RCA register .. 89 DSR register (Optional) .. 89 SCR register .. 89 6. SD Memory Card Hardware Hot Insertion and Removal .. 91 Card Detection (Insertion/Removal) .. 91 Power Protection (Insertion/Removal) .. 91 Power Scheme .. 91 Power Up .. 91 Power Down and Power 92 Programmable Card Output Driver (Optional) .. 92 Bus Operating 92 Bus Timing (Default) .. 92 Bus Timing (High-Speed Mode).. 92 7. SPI 93 SPI Bus Protocol .. 93 Mode Selection and 94 Bus Transfer 96 Data Read .. 96 Data Write .. 97 Erase & Write Protect 98 Read CID/CSD 99 Reset 99 Error Conditions .. 99 Memory Array 99 Card 99 Application Specific Commands .. 99 Content Protection 99 Switch Function Command.

10 100 High-Speed Mode .. 100 Speed Class 100 SPI Mode Transaction Packets .. 101 Command Tokens .. 101 Command Format .. 101 Command Classes .. 101 Detailed Command Description .. 102 Card Operation for CMD8 in SPI mode .. 108 Responses .. 109 Format 109 Format 109 Format Format Formats R4 & R5 ..111 Copyright 2001-2006 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association Physical Layer Simplified Specification Version Format Control Tokens .. 111 Data Response Start Block Tokens and Stop Tran Data Error Clearing Status Bits .. 113 Card 114 SPI Bus Timing 114 SPI Electrical Interface .. 114 SPI Bus Operating 114 Bus 114 8. SD Memory Card Mechanical Specification .