NXP Semiconductors QorIQ LS1012A Reference Manual

Table 18-14. Commands for /SD/SDIO cards and eMMC device (continued)CMDINDEXType Argument Resp Abbreviation DescriptionReads random number RN2 aschallenge2 in AKE process. Refersecurity specification version 2.00 formore details.ACMD476 adtc [31:0] stuff bits R1 SET_CER_RES2 AKE Command:Writes RES2 as response2 to RN2 inAKE processRefer Security Specification Version2.00 for more details.ACMD486 adtc [31:0] stuff bits R1 GET_CER_RES1 AKE Command:Reads RES1 as response1 to RN1 inAKE process.Refer Security Specification Version2.00 for more details.ACMD496 ac [31:0] stuff bits R1b CHANGE_SECURE_AREAProtected Area Access Command:Change size of the protected area. ReferSecurity Specification Version 2.00 formore details.ACMD516 adtc [31:0] stuff bits R1 SEND_SCR Reads the SD configuration register(SCR).1. CMD3 differs for eMMC devices and SD cards. For eMMC device, it is referred to as SET_RELATIVE_ADDR, with aresponse type of R1. For SD cards, it is referred to as SEND_RELATIVE_ADDR, with a response type of R6 (with RCAinside).2. CMD6 differs completely between high speed eMMC devices and high speed SD cards. Command SWITCH_FUNC is forhigh speed SD cards.3. Command SWITCH is for high speed eMMC devices. The Index field can contain any value from 0-255, but only values0-191 are valid. If the Index value is in the 192-255 range the card does not perform any modification and theSWITCH_ERROR status bit in the EXT_CSD register is set. The Access Bits are shown in Table 2.4. CMD8 for SD stands for SEND_IF_COND.5. CMD8 for eMMC stands for SEND_EXT_CSD.6. ACMDs should be preceded with the APP_CMD command. (Commands listed are used for SD only, other SD commandsnot listed are not supported on this module).Table 18-15. EXT_CSD access modesBits Access name Operation00 Command set The command set is changed according to the Cmd set field of the argument.01 Set Bits The bits in the pointed byte are set, according to the 1 bit in the Value field.10 Clear bits The bits in the pointed byte are cleared, according to the 1 bit in the Value field.11 Write Byte The Value field is written into the pointed byte.Chapter 18 Enhanced Secured Digital Host Controller (eSDHC)QorIQ LS1012A Reference Manual, Rev. 1, 01/2018NXP Semiconductors 851