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SanDisk microSD
OEM Product Manual
Revision 2.0
Document No. 80-36-03335
March 2013
SanDisk Corporation
Corporate Headquarters • 601 McCarthy Blvd. • Milpitas, CA 95035
Phone (408) 801-1000 • Fax (408) 801-8657
www.sandisk.com
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
agreements
SanDisk microSD
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Products, samples and prototypes are subject to update and change for technological and manufacturing
purposes.
SanDisk® Corporation general policy does not recommend the use of its products in life support
applications wherein a failure or malfunction of the product may directly threaten life or injury. Without
limitation to the foregoing, SanDisk shall not be liable for any loss, injury or damage caused by use of its
products in any of the following applications:
Special applications such as military related equipment, nuclear reactor control, and aerospace
Control devices for automotive vehicles, train, ship and traffic equipment
Safety system for disaster prevention and crime prevention
Medical-related equipment including medical measurement device
Accordingly, in any use of SanDisk products in life support systems or other applications where failure
could cause damage, injury or loss of life, the products should only be incorporated in systems designed
with appropriate redundancy, fault tolerant or back-up features. Per SanDisk Terms and Conditions of
Sale, the user of SanDisk products in life support or other such applications assumes all risk of such use
and agrees to indemnify, defend and hold harmless SanDisk Corporation and its affiliates against all
damages.
Security safeguards, by their nature, are capable of circumvention. SanDisk cannot, and does not,
guarantee that data will not be accessed by unauthorized persons, and SanDisk disclaims any warranties
to that effect to the fullest extent permitted by law.
This document and related material is for information use only and is subject to change without prior notice.
SanDisk Corporation assumes no responsibility for any errors that may appear in this document or related
material, nor for any damages or claims resulting from the furnishing, performance or use of this document
or related material. SanDisk Corporation explicitly disclaims any express and implied warranties and
indemnities of any kind that may or could be associated with this document and related material, and any
user of this document or related material agrees to such disclaimer as a precondition to receipt and usage
hereof. EACH USER OF THIS DOCUMENT EXPRESSLY WAIVES ALL GUARANTIES AND
WARRANTIES OF ANY KIND ASSOCIATED WITH THIS DOCUMENT AND/OR RELATED MATERIALS,
WHETHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR INFRINGEMENT,
TOGETHER WITH ANY LIABILITY OF SANDISK CORPORATION AND ITS AFFILIATES UNDER ANY
CONTRACT, NEGLIGENCE, STRICT LIABILITY OR OTHER LEGAL OR EQUITABLE THEORY FOR
LOSS OF USE, REVENUE, OR PROFIT OR OTHER INCIDENTAL, PUNITIVE, INDIRECT, SPECIAL OR
CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION PHYSICAL INJURY OR DEATH,
PROPERTY DAMAGE, LOST DATA, OR COSTS OF PROCUREMENT OF SUBSTITUTE GOODS,
TECHNOLOGY OR SERVICES.
No part of this document may be reproduced, transmitted, transcribed, stored in a retrievable manner or
translated into any language or computer language, in any form or by any means, electronic, mechanical,
magnetic, optical, chemical, manual or otherwise, without the prior written consent of an officer of SanDisk
Corporation.
All parts of the SanDisk documentation are protected by copyright law and all rights are reserved.
SanDisk and the SanDisk logo are registered trademarks of SanDisk Corporation, registered in the United
States and other countries. All other brand names mentioned herein are for identification purposes only
and may be trademarks and/or registered trademarks of their respective holder(s).
© 2008 - 2010 SanDisk Corporation. All rights reserved.
Document No. 80-36-03335 Rev 2.0
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
agreements
SanDisk microSD
Revision History
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OEM Product Manual
Revision 2.0
Date
Revision
Description
July 2008
1.0
First Revision
March 2010
2.0
Added 32GB; Removed 512MB
Replaced SD2.0 with SD3.0
ACMD41 to ready after power-up updated
Automatic Sleep Mode description updated
Partial blocks for read not allowed for microSDHC
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
agreements
SanDisk microSD
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Table of Contents
1
Introduction ................................................................ 1
1.1 General Description ....................................................... 1
1.2 Features ...................................................................... 2
1.3 Scope .......................................................................... 2
1.4 SD Card Standard ......................................................... 2
1.5 Functional Description ................................................... 3
1.5.1 Technology Independence ............................................ 3
1.5.2 Defect and Error Management ....................................... 3
1.5.3 Content Protection ....................................................... 3
1.5.4 Wear Leveling ............................................................. 3
1.5.5 Automatic Sleep Mode .................................................. 4
1.5.6 Hot Insertion ............................................................... 4
1.6 microSD Card Products in SD Bus Mode ........................... 4
1.7 SPI Mode ..................................................................... 6
2 Product Specifications .................................................. 7
2.1 microSD Card Product Family ......................................... 7
2.1.1 Typical Card Power Requirements .................................. 7
2.1.2 System Performance .................................................... 7
2.1.3 Physical Specifications .................................................. 8
Interface Description .................................................... 9
3.1 Pins and Registers ......................................................... 9
3.2 Bus Topology .............................................................. 10
3.2.1 SD Bus ..................................................................... 10
3.2.2 SPI Bus .................................................................... 10
3.3 Hot Insertion and Power Protection ................................ 10
3.4 Electrical Interface ....................................................... 11
3.4.1 Power Up .................................................................. 11
3.4.2 Bus Operating Conditions ............................................ 11
3.4.3 Bus Timing (Standard Mode) ....................................... 11
3.4.4 Bus Timing (High Performance Mode) ........................... 11
3.5 microSD Card Product Family Registers .......................... 12
3.5.1 Operation Conditions Register ..................................... 12
3.5.2 Card Identification Register ......................................... 12
3.5.3 Card Specific Data Register ......................................... 13
3.5.4 Card Status Register .................................................. 15
3.5.5 SD Status Register ..................................................... 15
3.5.6 Relative Card Address Register .................................... 15
3.5.7 SD Card Configuration Register ................................... 16
3.5.8 microSD Card Product Family Registers in SPI Mode....... 16
3
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
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3.5.9 Data Interchange Format and Card Sizes ...................... 16
4 microSD Card Protocol Description ................................ 17
4.1 General Description ...................................................... 17
4.2 SD Bus Protocol ........................................................... 17
4.3 Functional Description .................................................. 17
4.3.1 Card Identification Mode ............................................. 17
4.3.2 Data Transfer Mode ................................................... 17
4.3.3 Clock Control ............................................................ 17
4.3.4 Cyclic Redundancy Codes............................................ 18
4.3.5 Error Conditions ........................................................ 18
4.3.6 Commands ............................................................... 18
4.3.7 Card State Transition ................................................. 18
4.3.8 Timing Diagrams and Values ....................................... 18
4.3.9 Speed Class Specification ........................................... 18
4.3.10Erase Timeout Calculation ........................................... 18
5 Marking ..................................................................... 19
6 Ordering Information ................................................... 20
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
agreements
SanDisk microSD
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1
INTRODUCTION
1.1 General Description
The SanDisk microSD and microSDHC (SD High Capacity) Cards are flash based
removable non-volatile memory devices specifically designed to meet the security,
capacity, performance and environmental requirements inherent in next generation
mobile phones and consumer electronic devices. The SanDisk microSD Card is based
on the SD Card specification.1 microSDHC cards (above 2GB) have both the SDHC
and the Speed Class logo (Class 2, Class 4, Class 6 or Class 10) as defined by SD
Specification Version 3.0.
The SanDisk microSD Card includes a faster content protection system that complies
with the security of the Secure Digital Music Initiative (SDMI) standard and has a
higher memory capacity. In the SanDisk microSD Card, card content is protected
from illegal use by mutual authentication and a cipher algorithm. Unsecured access to
the user's own content is also available.
microSD Cards are based on a 8-pin interface designed to operate in a maximum
operating frequency of 50 MHz. The interface for microSD Card products allows for
easy integration into any design, regardless of which type of microprocessor is used.
In addition to the interface, microSD Card products offer an alternate communication-
protocol based on the SPI standard.
SanDisk microSD Card Product Family provides up to 32 gigabytes (GB) of memory
using flash memory chips, which were designed especially for use in mass storage
applications. In addition to the mass storage-specific flash memory chip, cards in the
microSD Card Product Family includes an on-board intelligent controller which
manages interface protocols; security algorithms for content protection; data storage
and retrieval, as well as Error Correction Code (ECC) algorithms; defect handling;
power management; wear leveling and clock control.
Figure 1: SD Card Block Diagram
1
Matsushita Electric Industrial Co. Ltd., SanDisk Corporation and Toshiba Corporation (SD-3C, LLC) originally defined
specifications for the SD Card. SD card specifications are now maintained, controlled and assigned by the SD-3C, LLC.
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
agreements
SanDiskSingle Chip ControllerNANDData In/OutControlSanDisk SD CardSD Bus/SPI BusInterface
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1.2 Features
General features of cards in the SanDisk microSD Card Product Family include:
Up to 32 GB2 of data storage
SD - protocol compatible
Supports SPI Mode
Targeted for portable and stationary applications for secured (content protected)
and unsecured data storage
Voltage range of 2.7 to 3.6V
Variable clock rate 0-25 MHz (standard), 0-50 MHz (high performance)
Up to 25 MB/sec data transfer rate (using four parallel data lines)
Memory field error correction
Content protection mechanism that complies with highest security of SDMI
standard
Password protection
Built-in write protection features (permanent and temporary)
Supports card detection (insertion and removal)
Application-specific commands
1.3 Scope
This document describes key features and specifications of the SanDisk microSD
Cards as well as the information required to interface these products to a host system.
Chapter 2 describes the physical and mechanical properties of cards in the SanDisk
microSD Card Product Family, Chapter 3 contains the pins and register overview, and
Chapter 4 gives a general overview of the SD protocol. Information about SPI
Protocol can be referenced in Section 7 of the SDA Physical Layer Specification,
Version 3.00.
1.4 SD Card Standard
SanDisk microSD cards are fully compatible with the SDA Physical Layer
Specification, Version 3.00. This specification is available from the SD Card
Association (SDA).
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
Web site: www.sdcard.org
2
1 megabyte (MB) = 1 million bytes; 1 gigabyte (GB) = 1 billion bytes. Some of the listed capacity is used for
formatting and other functions, and thus is not available for data storage.
03/10, Version 2.0. © 2008 - 2010 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure
agreements