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> If TLEN = 0000000h, it does not affect the data transaction (same as LM = 0). It is transmitted in msb first, lsb last. Rsvd (Reserved): Reserved bits. Initiator (Host) shall set them to '0', and receiver (Device) shallignore them.7.2.1.3 RESFigure 7-6 illustrates the generic structure of RES associated with CCMD and DCMD on <strong>SD</strong>-TRAN.BitByte4::01237 or 197 6 5 4 3 2 1 0NACK=0Header(NP=0, Packet Type = RES)CMD_ECHO_BACK(Argument of CMD is copied here)CONTENTFigure 7-6 : RES Format on <strong>SD</strong>-TRAN (Generic) NACK (Negative Acknowledgement): Indicator whether the corresponding CMD is accepted ornot. CMD_ECHO_BACK[14:0] (Command Echo Back): Copied field of CMD Argument.Header Argument PayloadEncapsulated <strong>SD</strong> RES /wo CRC7The same values in Argument field such as CMD_INDEX or TMODE are copied from thecorresponding CMD (echo back). Specifically, [6:0] in the second byte, and [7:0] in thethird byte of CMD packet are copied to the same location of RES packet. CONTENT: Content of Response. Refer to Figure 7-7 for R2, and Figure 7-8 for other than R2 formore details. Rsvd in Figure 7-7 is reserved bits, so initiator (Device) shall set it to '0' and receiver(Host) shall ignore them.DID field in Header is set to the same value as SID field in Header of the corresponding command. TIDfield in Header is set to the same value as TID field in Header of the corresponding command.80
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