SanDisk SD Card

More documents

Recommendations

Info

Revision 2.2Chapter 4 – SD Card Protocol DescriptionSanDisk SD Card Product ManualClass 0 1 2 3 4 5 6 7 8 9 10 11CMD Basic R BlockReadRBlockWriteEraseWriteProtectionCMD28 +CMD29 +CMD30 +CMD32 +CMD33 +CMD34 21toCMD37CMD38 +CMD42 +LockCardApp-SpecificI/OModeCMD50 22 +CMD52 +CMD53 +CMD55 +CMD56 +CMD57 23 +ACMD6 +ACMD13 +ACMD22 +ACMD41 +ACMD42 +ACMD51 +R = ReservedSwitch+R4.8.4 Command DescriptionAll future reserved commands and their responses must be 48 bits long. Responses maynot have any response. Table 4-16 details the SD Card bus commands.Table 4-16SD Card Bus Command DescriptionsCMD Index Type Argument Resp. Abbreviation DescriptionBasic Commands (Class 0)CMD0 bc [31:0] stuffbitsCMD1ReservedCMD2 bcr [31:0]stuffbits--- GO_IDLE_STATE Reset all cards to IdleState.R2 ALL_SEND_CID Asks all cards to sendtheir CID numbers onthe CMD line.21 This command is newly defined in SD Card Physical Description Spec. v1.10 .22 Ibid.23 Ibid.© 2004 SanDisk Corporation 4-32 12/08/04
Revision 2.2Chapter 4 – SD Card Protocol DescriptionSanDisk SD Card Product ManualCMD Index Type Argument Resp. Abbreviation DescriptionCMD3 bcr [31:0]stuffbitsCMD4 bcr [31:0]stuffbitsCMD5CMD7 ac [31:16]RCA[15:0] don’tcareR6 SEND_RELATIVE_ADDR Asks the card to publisha new relative address--- SET_DSR Programs the DSR of allcardsReserved for I/O cards (refer to the SDIO Card Specification)R1b(fromselectedcardonly)SELECT/DESELECT_CARDToggles card betweenthe stand-by andtransfer states -orprogramminganddisconnect states. Inboth cases, the card isselected by its ownrelative address anddeselected by any otheraddress; address 0deselects all. If theRCA=0, the host may doone of the following:>>Use other RCAnumber to perform cardde-selection.>>Re-send CMD3 tochange its RCA numberto other than 0 and useCMD7 w/RCA=0 for cardde-selectionCMD8ReservedCMD9 ac [31:16]RCA[15:0] stuffbitsCMD10 ac [31:16]RCA[15:0] stuffbitsCMD11ReservedCMD12 ac [31:0] stuffbitsCMD13 ac [31:16]RCA[15:0] stuffbitsCMD14ReservedCMD15 ac [31:16]RCA[15:0] stuffbitsR2 SEND_CSD Sends addressed card’scard-specific data (CSD)on the CMD line.R2 SEND_CID Sends addressed card’scard identification (CID)on the CMD line.R1b STOP_TRANSMISSION Forces the card to stoptransmission.R1 SEND_STATUS Sends addressed card’sStatus Register.--- GO_INACTIVE_STATE Sets the card to inactivestate.Block Read Commands (Class 2)CMD16 ac [31:0] blocklengthR1 SET_BLOCKLEN Sets the block length (inbytes) for all followingblock commands (read,write, lock). Defaultblock length is fixed512Bytes. If block lengthis set bigger than512Bytes, the card willset theBLOCK_LEN_ERRORbit. Supported only ifPartial block RD/WRoperation are allowed in© 2004 SanDisk Corporation 4-33 12/08/04
Page 4 and 5:
Revision 2.2SanDisk SD Card Product
Page 6 and 7:
Revision 2.2Chapter 1 - Introductio
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Revision 2.2Chapter 2 - Product Spe
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Revision 2.2Chapter 3 - SD Card Int
Page 24 and 25:
Revision 2.2Chapter 3 - SD Card Int
Page 26 and 27: Revision 2.2Chapter 3 - SD Card Int
Page 46 and 47: Revision 2.2Chapter 4 - SD Card Pro
Page 92 and 93: Revision 2.2Chapter 5 - SPI Protoco
Page 112 and 113: Revision 2.2Appendix B -SanDisk Wor
Page 114 and 115: Revision 2.2Appendix C -Limited War
Page 116 and 117: Revision 2.2Appendix D -Disclaimer
Page 118 and 119: Host Design Considerations:Applicat
show all

SanDisk SD Card

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

Delete template?

Save as template?