SanDisk SDSDB-32-201-80 - Industrial Grade Flash Memory Card Product Manual page 93

CMD SPI Argument
INDEX Mode
CMD26 No
CMD27 Yes
CMD28 Yes [31:0] data address
1
CMD29 Yes [31:0] data address
4
CMD30 Yes [31:0] write protect
data address
CMD31
CMD32 Yes [31:0] data address
CMD33 Yes [31:0] data address
CMD34
....
CMD37
CMD38 Yes [31:0] don't care*
CMD39 No
CMD40 No
CMD41 ...
CMD54
CMD55 Yes [31:0] stuff bits
CMD56 Yes [31:0] stuff bits
[0]: RD/WR.
CMD57
CMD58 Yes
CMD59 Yes [31:1] don't care*
[0:0] CRC option
CMD60-63
* The bit places must be filled but the values are irrelevant.
1) These features are not currently supported in the SanDisk SD Card.
2) 32 write protection bits (representing 32 write protect groups starting at the specified address) followed by 16
CRC bits are transferred in a payload format via the data line.
3) RD/WR_: "1"=the host will get a block of data from the card. "0"=the host sends a block of data to the card.
SanDisk Secure Digital (SD) Card Product Manual, Rev. 1.9 © 2003 SANDISK CORPORATION
Resp
None R1 PROGRAM_CSD
R1b SET_WRITE_PROT
R1b CLR_WRITE_PROT
R1
R1 ERASE_WR_BLK_START
R1 ERASE_WR_BLK_END
R1b
R1
R1
3
None R3
R1
Abbreviation
Programming of the programmable bits of the CSD.
If the card has write protection features, this
command sets the write protection bit of the
addressed group. The properties of write protection
are coded in the card specific data
(WP_GRP_SIZE).
If the card has write protection features, this
command clears the write protection bit of the
addressed group.
SEND_WRITE_ If the card has write protection features, this
PROT command asks the card to send the status of the
write protection bits.
Reserved
Sets the address of the first write block to be
_ADDR erased.
Sets the address of the last write block in a
_ADDR continuous range to be erased.
Reserved
ERASE Erases all previously selected write blocks.
Reserved
APP_CMD Notifies the card that the next command is an
application specific command rather than a
standard command.
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 is defined with
SET_BLOCK_LEN command.
Reserved
READ_OCR Reads the OCR register of a card.
CRC_ON_OFF Turns the CRC option on or off. A '1' in the CRC
option bit will turn the option on, a '0' will turn it off.
No
SPI Protocol Definition
Command Description
2
5-11