Table 169. I/O Mode Commands; Table 170. Lock Card; Table 171. Application-Specific Commands - STMicroelectronics STM32F405 Reference Manual

RM0090
CMD
Type Argument
index
Reserved. This command index cannot be used in order to maintain backward compatibility with older
CMD37
versions of the MultiMediaCards
CMD38 ac [31:0] stuff bits
CMD
Type Argument
index
[31:16] RCA
[15:15] register
write flag
CMD39 ac
[14:8] register
address
[7:0] register data
CMD40 bcr [31:0] stuff bits
CMD41 Reserved
CMD
Type Argument
index
CMD42 adtc [31:0] stuff bits
CMD43
... Reserved
CMD54
CMD
Type Argument
index
[31:16] RCA
CMD55 ac
[15:0] stuff bits
[31:1] stuff bits
CMD56 adtc
[0]: RD/WR
Table 168. Erase commands (continued)
Response
format
R1
ERASE

Table 169. I/O mode commands

Response
Abbreviation
format
R4
FAST_IO
R5 GO_IRQ_STATE Places the system in the interrupt mode.

Table 170. Lock card

Response
Abbreviation
format
R1b
LOCK_UNLOCK

Table 171. Application-specific commands

Response
Abbreviation
format
R1
APP_CMD
DocID018909 Rev 11
Secure digital input/output interface (SDIO)
Abbreviation
Erases all previously selected write
blocks.
Used to write and read 8-bit (register) data
fields. The command addresses a card and a
register and provides the data for writing if
the write flag is set. The R4 response
contains data read from the addressed
register. This command accesses
application-dependent registers that are not
defined in the MultiMediaCard standard.
Sets/resets the password or locks/unlocks
the card. The size of the data block is set
by the SET_BLOCK_LEN command.
Indicates to the card that the next command
bits is an application specific command rather
than a standard command
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.
Description
Description
Description
Description
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