SanDisk 4GB micro SDHC Memory Card for Product Manual - Page 4

SanDisk microSD™, microSDHC™ and microSDXC™ cards OEM Product Manual 2.5 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 3 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 8 2.1.3 Reliability and Durability 9 2.1.4 Physical Specifications 9 3 Interface Description 10 3.1 Pins and Registers 10 3.2 Bus Topology 11 3.2.1 SD Bus 11 3.2.2 SPI Bus 11 3.3 Hot Insertion and Power Protection 11 3.4 Electrical Interface 11 3.4.1 Power Up 11 3.4.2 Bus Operating Conditions 12 3.4.3 Bus Timing 12 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 16 3.5.6 Relative Card Address Register 16 3.5.7 SD Card Configuration Register 16 3.5.8 microSD Card Product Family Registers in SPI Mode 16 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 January 2012 Version 2.5 © 2008 - 2012 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure agreements iii