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emIDE V2.20.exe
emIDE is a free and full-featured IDE (Integrated Development Environment) integrating all features needed for developing and testing professional embedded applications.
2015-12-13
sd 协议 2.0
1 General Description
2 System Features
3 SD Memory Card System Concept
31 Read-Write Property
32 Supply Voltage
33 Card Capacity
34 Speed Class
35 Bus Topology
36 Bus Protocol
361 SD Bus
362 SPI Bus
37 SD Memory Card–Pins and Registers
4 SD Memory Card Functional Description
41 General
42 Card Identification Mode
421 Card Reset
422 Operating Condition Validation1
423 Card Initialization and Identification Process
43 Data Transfer Mode
431 Wide Bus Selection/Deselection
432 2 GByte Card
433 Data Read
434 Data Write
435 Erase
436 Write Protect Management
437 Card Lock/Unlock Operation
4371 General
4372 Parameter and the Result of CMD42
4373 Forcing Erase
43731 Force Erase Function to the Locked Card
4374 Relation Between ACMD6 and Lock/Unlock State
4375 Commands Accepted for Locked Card
4376 Two Types of Lock/Unlock Card
438 Content Protection
439 Application-Specific Commands
4391 Application-Specific Command – APP_CMD (CMD55)
4392 General Command - GEN_CMD (CMD56)
4310 Switch Function Command
43101 General
43102 Mode 0 Operation - Check Function
43103 Mode 1 Operation - Set Function
43104 Switch Function Status
431041 Busy Status Indication for Functions
431042 Data Structure Version
431043 Function Table of Switch Command
43105 Relationship between CMD6 data & other commands
43106 Switch Function Flow Example
43107 Example of Checking
4311 High-Speed Mode (25 MB/sec interface speed)
4312 Command System
4313 Send Interface Condition Command (CMD8)
4314 Command Functional Difference in High Capacity SD Memory Card
44 Clock Control
45 Cyclic Redundancy Code (CRC)
46 Error Conditions
461 CRC and Illegal Command
462 Read, Write and Erase Timeout Conditions
4621 Read
4622 Write
4623 Erase
47 Commands
471 Command Types
472 Command Format
473 Command Classes
474 Detailed Command Description
48 Card State Transition Table
49 Responses
491 R1 (normal response command):
492 R1b
493 R2 (CID, CSD register)
494 R3 (OCR register)
495 R6 (Published RCA response)
496 R7 (Card interface condition)
410 Two Status Information of SD Memory Card
4101 Card Status
4102 SD Status
411 Memory Array Partitioning
412 Timings
413 Speed Class Specification
4131 Allocation Unit (AU)
4132 Recording Unit (RU)
4133 Write Performance
4134 Read Performance
4135 Performance Curve Definition
4136 Speed Class Definition
4137 Consideration for Inserting FAT Update during Recording
4138 Measurement Conditions and Requirements of the Speed Class
414 Erase Timeout Calculation
4141 Erase Unit
4142 Case Analysis of Erase Time Characteristics
4143 Method for Erase Large Areas
4144 Calculation of Erase Timeout Value Using the Parameter Registers
5 Card Registers
51 OCR register
52 CID register
53 CSD Register
531 CSD_STRUCTURE
532 CSD Register (CSD Version 10)
533 CSD Register (CSD Version 20)
54 RCA register
55 DSR register (Optional)
56 SCR register
6 SD Memory Card Hardware Interface
61 Hot Insertion and Removal
62 Card Detection (Insertion/Removal)
63 Power Protection (Insertion/Removal)
64 Power Scheme
641 Power Up
642 Power Down and Power Cycle
65 Programmable Card Output Driver (Optional)
66 Bus Operating Conditions
67 Bus Timing (Default)
68 Bus Timing (High-Speed Mode)
7 SPI Mode
71 Introduction
72 SPI Bus Protocol
721 Mode Selection and Initialization
722 Bus Transfer Protection
723 Data Read
724 Data Write
725 Erase & Write Protect Management
726 Read CID/CSD Registers
727 Reset Sequenc
728 Error Conditions
729 Memory Array Partitioning
7210 Card Lock/Unlock
7211 Application Specific Commands
7212 Content Protection Command
7213 Switch Function Command
7214 High-Speed Mode
7215 Speed Class Specification
73 SPI Mode Transaction Packets
731 Command Tokens
7311 Command Format
7312 Command Classes
7313 Detailed Command Description
7314 Card Operation for CMD8 in SPI mode
732 Responses
7321 Format R1
7322 Format R1b
7323 Format R2
7324 Format R3
7325 Formats R4 & R5
7326 Format R7
733 Control Tokens
7331 Data Response Token
7332 Start Block Tokens and Stop Tran Token
7333 Data Error Token
734 Clearing Status Bits
74 Card Registers
75 SPI Bus Timing Diagrams
76 SPI Electrical Interface
77 SPI Bus Operating Conditions
78 Bus Timing
8 SD Memory Card Mechanical Specification
Appendix A
A1 Connector
A2 Related Documentation
Appendix B
B1 Abbreviations and terms
2011-11-19
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