SD Specifications Part 1 UHS-II Simplified Addendum - SD Association

UHS-II Simplified Addendum Version 1.01©Copyright 2010-2013 SD Card Association3.4 UHS-II Initialization OutlineHost shall execute UHS-II Initialization flow as described in Section 3.4.1 (in case of without Boot CodeLoading) or in Section 3.4.2 (in case of with Boot Code Loading). If Host violates those rules, Deviceoperation is not guaranteed.3.4.1 UHS-II Initialization Flow without Boot Code LoadingFigure 3-11 shows a UHS-II Initialization flow after I/F power cycle or issuing FULL_RESET command(refer to Table 6-20 for more details). Details of state transition are defined in Section 5.2.9.Process nameOutline of processPower OnFULL_RESETPHY Initialization starts whenDevice detects STB.LPHY Initialization• PLL Activation• Establishing synchronizationWakeup StateThese processes aremandatory after power cycleor FULL_RESET.Device Initialization• Starting Device wakeupEnumeration• Device ID assignmentConfig StateConfiguration• Reading and Setting forCFG_REG"Config Completion"is set to 1Active StateFigure 3-11 : UHS-II Initialization FlowAfter I/F power cycle or FULL_RESET, PHY Initialization process is started by Host's providing RCLKand STB.L.After finishing PHY Initialization, the state transits to Config State and the following three processestake place. Device Initialization: This process is executed by DEVICE_INIT CCMD and makes wholecomponents in Device activated. Refer to Section 6.2.6 for more details. Enumeration: This process is executed by ENUMERATE CCMD and assigns Node IDs for each11