Product manual

Secure Digital (SD) Card Protocol Description
4-22 SanDisk Industrial Grade SD Product Manual, Rev. 1.0 © 2003 SANDISK CORPORATION
Table 4-7. Erase Commands (Class 5)
Cmd
Index
Type Argument Resp Abbreviation Command Description
CMD32 ac [31:0] data
address
R1 ERASE_WR_BLK_START Sets the address of the first write block to be
erased.
CMD33 ac [31:0] data
address
R1 ERASE_WR_BLK_END Sets the address of the last write block of the
continuous range to be erased.
CMD34
…
CMD37
Reserved
CMD38 ac [31:0] don’t care* R1b ERASE Erases all previously selected write blocks.
CMD39
…
CMD41
Reserved
* The bit places must be filled but the value is irrelevant.
Table 4-8. Lock Card Commands (Class 7)
Cmd
Index
Type Argument Resp Abbreviation Command Description
CMD42
….
CMD54
SDA Optional Commands, currently supported by SanDisk Industrial Grade SD Card.
Table 4-9. Application Specific Commands (Class 8)
CMD
INDEX
Type Argument Resp. Abbreviation Command Description
CMD55 ac [31:16] RCA [15:0]
stuff bits
R1 APP_CMD Indicates to the card that the next command is an
application specific command rather than a
standard command
CMD56 adtc [31:1] stuff bits.
[0]: RD/ WR
1
R1 GEN_CMD Used either to transfer a data block to the card or
to get a data block from the card for general
purpose / application specific commands. The
size of the data block shall be set by the
SET_BLOCK_LEN command.
CMD57 ...
CMD59
Reserved
CMD60 -63 Reserved for Manufacturer
1) RD/WR: “1” = the host gets a block of data from the card. “0” = the host sends a block of data to the card.