SD Specifications Part 1 UHS-II Simplified Addendum - SD Association
SD Specifications Part 1 UHS-II Simplified Addendum - SD Association
SD Specifications Part 1 UHS-II Simplified Addendum - SD Association
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<strong>UHS</strong>-<strong>II</strong> <strong>Simplified</strong> <strong>Addendum</strong> Version 1.01©Copyright 2010-2013 <strong>SD</strong> Card <strong>Association</strong> <strong>SD</strong>_DATA: Data included with DATA The length of Payload field depends on CMD_INDEX. Refer to Section 7.2.2 for moredetails. It is transmitted in LSB first, MSB last.Following of Section 7.2.1 is a blank in the <strong>Simplified</strong> <strong>Addendum</strong>.7.2.2 DATA Burst Framing Rules in <strong>SD</strong>-TRANSection 7.2.2 is a blank in the <strong>Simplified</strong> <strong>Addendum</strong>.7.2.3 Interface Selection for <strong>UHS</strong>-<strong>II</strong> Card and Initialization7.2.3.1 OverviewAs Hosts and Devices supporting <strong>UHS</strong>-<strong>II</strong> interface shall also support <strong>SD</strong> Legacy interface, Hostsupporting <strong>UHS</strong>-<strong>II</strong> (simply described as "Host") interface may select either <strong>UHS</strong>-<strong>II</strong> interface or Legacy<strong>SD</strong> interface after power up. Only in Section 7.2.3, "CMD" denotes the command described in <strong>SD</strong>Physical <strong>Simplified</strong> Specification Version 4.10, and <strong>SD</strong> command on <strong>UHS</strong>-<strong>II</strong> is described as"encapsulated CMD".7.2.3.2 Interface Selection after Power UpFigure 7-11 shows a concept diagram of initialization flow after power up.From "data transfer mode in Legacy <strong>SD</strong>"<strong>SD</strong> I/F is selected<strong>UHS</strong>-<strong>II</strong><strong>SD</strong>I/FI/FSELBECard ControllerCMD0Host sets RCLKLane to DIF-Z(to stop RCLK)Host supplies<strong>SD</strong>CLKCMD0 (*1)CMD8 (*2)ACMD41<strong>UHS</strong>-<strong>II</strong> I/F DeactivationDisabling <strong>UHS</strong>-<strong>II</strong> I/FCMD2CMD3NoConfigurationenables to detectApplication Type is<strong>SD</strong>-memory(*3)CMD0(<strong>SD</strong>-TRAN)Power UpHost supplies VDD2, RCLK (and VDD1),and sets STB.L on D0.TxHost detects STB.Lon D1.Rx?YesPHY Initialization• PLL Activation• Establishing synchronization• Disabling <strong>SD</strong> I/FDevice InitializationEnumerationConfigurationInitialization for <strong>SD</strong>-TRAN(*4)CMD8ACMD41CMD2CMD3<strong>UHS</strong>-<strong>II</strong> InitializationBoot CodeLoading maybe executed.GO_DORMANT_STATE<strong>UHS</strong>-<strong>II</strong> I/F is selected<strong>UHS</strong>-<strong>II</strong><strong>SD</strong>I/FI/FSELBECard Controller"<strong>SD</strong>-TRAN card identification mode""data transfer mode" in Legacy <strong>SD</strong>"<strong>SD</strong>-TRAN data transfer mode"Note:(*1) CMD0 can be issued before CMD8.(*2) CMD8 is mandatory because <strong>UHS</strong>-ll Card is not available over <strong>SD</strong>SC.(*3) Refer to <strong>SD</strong> <strong>Specifications</strong> <strong>Part</strong> 1 Physical Layer Specification Version 4.00.(*4) All CMDs are executed on <strong>SD</strong>-TRAN.Figure 7-11 : Initialization Flow after Power Up83
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