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

More documents

Recommendations

Info

UHS-II Simplified Addendum Version 1.01©Copyright 2010-2013 SD Card AssociationBitByte01237 6 5 4 3 2 1 0RsvdAPPHeader(NP=0, Packet Type = CCMD)Rsvd[45] CMD_INDEX [40]4::7[39][15]SD_ARG[32][8]Header Argument PayloadEncapsulated SD CMD /wo CRC7Figure 7-4 : CCMD Format on SD-TRAN APP: Indicator for application command. APP = 1 means application command, otherwise regularcommand. Device shall regard as application command if APP = 1. CMD_INDEX[5:0]: CMD Index in Legacy SD Command to be issued. SD_ARG: Corresponding argument for the Legacy SD Command. Notice the bit order of Payload field. Rsvd (Reserved): Reserved bits. Initiator (Host) shall set them to '0', and receiver (Device) shallignore them.78
UHS-II Simplified Addendum Version 1.01©Copyright 2010-2013 SD Card Association7.2.1.2 DCMDFigure 7-5 illustrates DCMD on SD-TRAN.BitByte01237 6 5 4 3 2 1 0RsvdRsvdHeader(NP=0, Packet Type = DCMD)TMODERsvdAPP [45] CMD_INDEX [40]4567[891011](msb)(msb)SD_ARG[TLEN](lsb)(lsb)Header Argument Extended ArgumentEncapsulated SD CMD /wo CRC7Figure 7-5 : DCMD Format on SD-TRAN TMODE[3:0] (Transfer Mode): Parameter settings for data transaction. Host may set DM to 1 for DCMD which supports multi-block read / write regardless ofdata transfer length (e.g., CMD18, CMD25). Otherwise, it shall not set DM to 1. (e.g.CMD6, CMD17, CMD24). These rules are also applied to other multi-block read / writecommands defined in other Part of SD specifications (for example, Host may set DM to 1for ACMD18 or ACMD25). LM is alternative only for CMD18 and 25, and it shall be set to 0 for other DCMDs. Both DAM and TLUM shall be set to 0. If Host issues DCMD with DM = 1 to Device which does not support 2L-HD mode, Devicereturns RES with NACK = 1. APP: Indicator for application command. APP = 1 means application command, otherwise regularcommand. Device shall regard as application command if APP = 1. CMD_INDEX[5:0]: CMD Index in Legacy SD Command to be issued. SD_ARG: Corresponding argument for the Legacy SD Command. TLEN[31:0] (Transfer Length): Total length of data transmitted during a data transaction This field exists only for CMD18 or CMD25 with LM = 1, and unit of TLEN is a block (512bytes in SD-memory). It is strongly recommended for Host to be set LM = 1 and TLEN > 0in case of CMD18 and CMD25.79
Page 4:
UHS-II Simplified Addendum Version
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41: UHS-II Simplified Addendum Version
Page 60: UHS-II Simplified Addendum Version
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?