SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Product Manual page 73

Table 4-10 describes all the application specific commands supported/reserved by the SD Card. All the following
ACMDs shall be preceded with APP_CMD command (CMD55)
Table 4-10. Application Specific Commands Used/Reserved by SD Card
ACMD Type Argument
INDEX
ACMD6 ac [31:2] stuff bits
[1:0]bus width
ACMD13 adtc [31:0] stuff bits
ACMD17
ACMD18 --
ACMD19
to
ACMD21
ACMD22 adtc [31:0] stuff bits
ACMD23 ac [31:23] stuff bits
[22:0]Number of blocks
ACMD24
ACMD25 --
ACMD26 --
ACMD38 --
ACMD39
to
ACMD40
ACMD41 bcr [31:0]OCR
without busy
ACMD42 ac [31:1] stuff bits
[0]set_cd
ACMD43 --
ACMD49
ACMD51 adtc [31:0] staff bits
NOTES: 1) Refer to SD Card Security Specification for detailed explanation about the SD Security Features
2) Command STOP_TRAN (CMD12) shall be used to stop the transmission in Write Multiple Block whether the pre-
erase (ACMD23) feature is used or not.
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
Resp.
R1 SET_BUS_WIDTH
R1
-- --
R1 SEND_NUM_WR_
R1 SET_WR_BLK_
ERASE_COUNT
-- --
-- --
-- --
R3 SD_APP_OP_COND
R1 SET_CLR_CARD_
-- --
R1
Secure Digital (SD) Card Protocol Description
.
Abbreviation
Defines the data bus width ('00'=1bit or '10'=4 bits bus)
to be used for data transfer.
SD_STATUS Send the SD Card status. The status fields are given in
Table 4-28.
Reserved
-- Reserved for SD security applications.
Reserved
Send the number of the written (without errors) write
BLOCKS blocks. Responds with 32bit+CRC data block.
Set the number of write blocks to be pre-erased before
writing (to be used for faster Multiple Block WR
command). "1"=default (one wr block)
Reserved
-- Reserved for SD security applications.
-- Reserved for SD security applications.
-- Reserved for SD security applications.
Reserved
Asks the accessed card to send its operating condition
register (OCR) con tent in the response on the CMD
line.
Connect[1]/Disconnect[0] the 50KOhm pull-up resistor
DETECT on CD/DAT3 (pin 1) of the card. The pull-up may be
used for card detection.
-- Reserved for SD security applications.
SEND_SCR Reads the SD Configuration Register (SCR).
Command Description
1
2 .
1
1
1
1
4-23