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SD Specifications
Part 1
Physical Layer
Simplified Specification
Version 3.01
May 18, 2010
SD Group
Panasonic Corporation
SanDisk Corporation
Toshiba Corporation
Technical Committee
SD Card Association
©Copyright 2001-2010 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 3.01
i
Revision History
Date Version Changes compared to previous issue
April 3, 2006 1.10 Physical Layer Simplified Specification Version 1.10 initial release.
(Supplementary Notes Ver1.00 is applied.)
September 25, 2006 2.00 Physical Layer Simplified Specification Version 2.00
May 18, 2010 3.01 Physical Layer Simplified Specification Version 3.01
To the extent this proposed specification, which is being submitted for review under the IP
Policy, implements, incorporates by reference or refers to any portion of versions 1.0 or 1.01
of the SD Specifications (including Parts 1 through 4), adoption of the proposed specification
shall require Members utilizing the adopted specification to obtain the appropriate licenses
from the SD-3C, LLC, as required for the utilization of those portion(s) of versions 1.0 or 1.01
of the SD Specifications.
For example, implementation of the SD Specifications in a host device under versions 1.0 or
1.01 and under the adopted specification requires the execution of a SD Host Ancillary
License Agreement with the SD-3C, LLC; and implementation of the SD Specifications under
versions 1.0 or 1.01 and under the proposed specification in a SD Card containing any
memory storage capability (other than for storage of executable code for a controller or
microprocessor within the SD Card) requires the execution of a SD Memory Card License
Agreement with the SD-3C, LLC.
©Copyright 2001-2010 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 3.01
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: office@sdcard.org
Copyright Holders:
The SD Group
Panasonic Corporation
SanDisk Corporation
Toshiba Corporation
The SD Card Association
Notes:
The copyright of the previous versions (Version 1.00 and 1.01) and all corrections or non-material
changes thereto are owned by SD Group.
The copyright of material changes to the previous versions (Version 1.01) 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. No license is
granted by implication or otherwise under any patent or rights of SD Group and SD Card Association or
others.
©Copyright 2001-2010 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 3.01
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, e.g., FFFFh and 80h.
• Binary numbers are written with a lower case "b" suffix (e.g., 10b).
• Binary numbers larger than four digits are written with a space dividing each group of four digits, as in
1000 0101 0010b.
• 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 2001-2010 SD Group (Panasonic, SanDisk, Toshiba) and SD Card Association
Physical Layer Simplified Specification Version 3.01
iv
Table of Contents
1. General Description............................................................................................................1
2. System Features.................................................................................................................3
3. SD Memory Card System Concept....................................................................................5
3.1 Read-Write Property......................................................................................................................5
3.2 Supply Voltage...............................................................................................................................5
3.3 Card Capacity................................................................................................................................5
3.3.1 User Area and Protected Area ................................................................................................5
3.3.2 Card Capacity Classification ...................................................................................................5
3.4 Speed Class ..................................................................................................................................6
3.5 Bus Topology .................................................................................................................................6
3.6 Bus Protocol ..................................................................................................................................7
3.6.1 SD Bus ....................................................................................................................................7
3.6.2 SPI Bus .................................................................................................................................10
3.7 SD Memory Card–Pins and Registers......................................................................................... 11
3.8 ROM Card ................................................................................................................................... 11
3.8.1 Register Setting Requirements .............................................................................................11
3.8.2 Unsupported Commands ......................................................................................................11
3.8.3 Optional Commands ............................................................................................................. 11
3.8.4 WP Switch.............................................................................................................................12
3.9 Ultra High Speed Phase I (UHS-I) Card ......................................................................................13
3.9.1 UHS-I Operation Modes........................................................................................................13
3.9.2 UHS-I Card Types .................................................................................................................13
3.9.3 Host and Card Combination..................................................................................................14
3.9.4 Bus Speed Modes Selection Sequence ................................................................................15
3.9.5 UHS System Block Diagram .................................................................................................16
3.9.6 Summary of Bus Speed Mode ..............................................................................................17
4. SD Memory Card Functional Description .......................................................................18
4.1 General........................................................................................................................................18
4.2 Card Identification Mode..............................................................................................................19
4.2.1 Card Reset ............................................................................................................................19
4.2.2 Operating Condition Validation..............................................................................................19
4.2.3 Card Initialization and Identification Process ........................................................................21
4.2.3.1 Initialization Command (ACMD41)........................................................................................ 23
4.2.4 Bus Signal Voltage Switch Sequence ...................................................................................24
4.2.4.1 Initialization Sequence for UHS-I .......................................................................................... 24
4.2.4.2 Timing to Switch Signal Voltage............................................................................................ 25
4.2.4.3 Timing of Voltage Switch Error Detection.............................................................................. 25
4.2.4.4 Voltage Switch Command..................................................................................................... 25
4.2.4.5 Tuning Command ................................................................................................................. 25
4.2.4.6 An Example of UHS-I System Block Diagram....................................................................... 26
4.3 Data Transfer Mode.....................................................................................................................27
4.3.1 Wide Bus Selection/Deselection ...........................................................................................29
4.3.2 2 GByte Card ........................................................................................................................29
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资源评论
- dtcmzt2013-09-08我觉得这种资料还是英文的讲的详实一些,谢谢了
- a121207272015-05-08很实用的文档
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