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

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UHS-II Simplified Addendum Version 1.01©Copyright 2010-2013 SD Card Association 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 SD-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 SD-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 SD 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
UHS-II Simplified Addendum Version 1.01©Copyright 2010-2013 SD Card AssociationBitByte01237 6 5 4 3 2 1 0NACK=0Header(NP=0, Packet Type = RES)CMD_ECHO_BACK(Argument of CMD is copied here)4[127][120]:::CID or CSD register incl.internal CRC7:19[7][1]RsvdHeader Argument PayloadEncapsulated SD RESNote: In UHS-II mode, field of CRC7 in R2 response is not used to check CRC, and may be set any valueFigure 7-7 : RES Format on SD-TRAN (R2)BitByte012345677 6 5 4 3 2 1 0NACK=0[39][15]Header(NP=0, Packet Type = RES)CMD_ECHO_BACK(Argument of CMD is copied here)Response Data[32][8]Header Argument PayloadEncapsulated SD RESFigure 7-8 : RES Format on SD-TRAN (Other than R2)81
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SD Specifications Part 1 UHS-II Simplified Addendum - SD Association

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