SanDisk 4GB micro SDHC Memory Card for Product Manual - Page 23

SanDisk microSD™, microSDHC™ and microSDXC™ cards OEM Product Manual 2.5 4.3.3 Clock Control The host can use the bus clock signal in SanDisk microSD cards to switch them to energy saving mode or to control data flow on the bus. See Section 4.4 of the SDA Physical Layer Specification, Version 3.01. Cyclic Redundancy Codes The Cyclic Redundancy Check (CRC) protects against transmission errors that may occur on the bus in SanDisk microSD Card Product Family cards. Detailed information and examples for CRC7 and CRC16 are provided in Section 4.5 of the SDA Physical Layer Specification, Version 3.01. 4.3.4 Error Conditions See Section 4.6 of the SDA Physical Layer Specification, Version 3.01. 4.3.5 Commands See Section 4.7 of the SDA Physical Layer Specification, Version 3.01 for detailed information about card commands in the SanDisk microSD Card Product Family. 4.3.6 Card State Transition In microSD cards, the state transition is dependent on the received command. The transition is defined in Section 4.8 of the SDA Physical Layer Specification, Version 3.01 along with responses sent on the command line. 4.3.7 Timing Diagrams and Values See Section 4.12 of the SDA Physical Layer Specification, Version 3.01. 4.3.8 Speed Class Specification SDA speed class specification classifies card minimum write performance by speed class number and offers the method to test performance. For more information, refer to Section 4.13 of the SDA Physical Layer Specification, Version 3.01. 4.3.9 Erase Timeout Calculation See Section 4.14 of the SDA Physical Layer Specification, Version 3.01. January 2012 Version 2.5 © 2008 - 2012 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure agreements 18