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 AssociationRange Speed Range[Mbps]RCLK FrequencyRange [MHz]RCLK:D0/D1RatioMin Max Min MaxA 390 780 26 52 1:15B 780 1,560 26 52 1:30Table 6-12 : Detailed Definitions of Transmission Speed Range70
UHS-II Simplified Addendum Version 1.01©Copyright 2010-2013 SD Card Association6.2.9.2.6 LINK/TRAN Settings RegisterThe table shown below describes LINK/TRAN Settings Register.LocationAttrib Register Field Name and Explanation WritableStateEffectiveTimingCMDcategory63-40 Rsvd -- Config/ -- Broadcast39-32 RW N_DATA_GAPThis field indicates minimum number of DIDLbetween DATA packets determined throughActive In Active(See Note(1))/P2PConfiguration. Initiator shall send DIDL atleast N_DATA_GAP between EOP and SOPwith in the DATA Burst. It is common for bothread and write transaction.31-20 RW MAX_BLKLENThis field indicates maximum payload lengthof one block in byte determined throughIn Active(See Note(2))Configuration (000h is reserved). BlockLength shall be smaller or equal to this value(refer to Section 6.2.8.2 for more details).If bit 16 in Generic Capabilities Register isequal to 1 ("Application Type" is SD-memory),this field shall be 200h (512 bytes).Default value is 200h.19-18 Rsvd -- --17-16 RW MAX_RETRY_NUMThis field indicates maximum retry times ofDATA Burst Retry. If MAX_RETRY_NUM =00b, DATA Burst Retry becomes disable.Default value is 11b.In Active(See Note(1))15-08 RW N_FCUThis field indicates maximum number ofblocks in a flow control unit (FCU) determinedthrough Configuration. 00h means 256.Default value is 01h. (See Note (3) and (4).)In Active(See Note(1))07-00 Rsvd -- --Note:(1) It is immediately effective in Active State.(2) It is immediately effective in Active State if there are no application specific layers. With any application specific layers, thisparameter is not reflected immediately if it is written in Active State.(3) If bit 16 in Generic Capabilities Register is equal to 1 ("Application Type" is SD-memory), its possible settings are 01h,02h, 04h, 08h, 10h, 20h, 40h, and 80h.(4) The length of a DATA Burst obtained by Block Length and N_FCU shall be smaller than or equal to 64K (65,536) bytesTable 6-13 : LINK/TRAN Settings Register6.2.9.2.7 Preset RegisterThe table shown below describes Preset Register.71
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SD Specifications Part 1 UHS-II Simplified Addendum - SD Association

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