NXP Semiconductors QorIQ LS1012A Reference Manual

Table 18-14. Commands for /SD/SDIO cards and eMMC device (continued)CMDINDEXType Argument Resp Abbreviation DescriptionCMD41 ReservedCDM42 adtc [31:0] stuff bits R1b LOCK_UNLOCK Used to set/reset the password or lock/unlock the card. The size of the datablock is set by the SET_BLOCK_LENcommand.CMD43-51 ReservedCMD52 ac As per SDIO specCMD52 formatR5 IO_RW_DIRECT Access a single register within the total128k of register space in any I/Ofunction.CMD53 ac As per SDIO specCMD53 formatR5 IO_RW_EXTENDED Accesses a multiple I/O register with asingle command. Allows the reading orwriting of a large number of I/Oregisters.CMD54 ReservedCMD55 ac [31:16] RCA[15:0] stuff bitsR1 APP_CMD Indicates to the card that the nextcommand is an application specificcommand rather that a standardcommand.CMD56 adtc [31:1] stuff bits[0]: RD/WRR1b GEN_CMD Used either to transfer a data block tothe card or to get a data block from thecard for general purpose / applicationspecific commands. The size of the datablock is set by the SET_BLOCK_LENcommand.CMD57-63 ReservedACMD6 ac [31:2] stuff bits [1:0]bus widthR1 SET_BUS_WIDTH Defines the data bus width ('00'=1bit or'10'=4bit bus) to be used for datatransfer. The allowed data bus widthsare given in SCR register.ACMD136 adtc [31:0] stuff bits R1 SD_STATUS Send the SD Memory Card status.ACMD186 adtc [31:0] stuff bits R1 SECURE_READ_MULTI_BLOCKProtected Area Access Command:Reads continuously transfer data blocksfrom protected area of SD memory card.Refer Security Specification Version2.00 for more details.ACMD226 adtc [31:0] stuff bits R1 SEND_NUM_WR_SECTORSSend the number of the written sectors(without errors). Responds with 32-bitplus the CRC data block.ACMD236 ac [31:0] stuff bits R1 SET_WR_BLK_ERASE_COUNTIn SD cards, set the number of writeblocks to be pre-erased before writing(to be used for faster multiple block writecommand)Default value is 1 (one write block).ACMD256 adtc [31:0] stuff bits R1 SECURE_WRITE_MULTI_BLOCKProtected Area Access Command:Table continues on the next page...Chapter 18 Enhanced Secured Digital Host Controller (eSDHC)QorIQ LS1012A Reference Manual, Rev. 1, 01/2018NXP Semiconductors 849