ST STM32F101xx User Manual

Secure digital input/output interface (SDIO) RM0008
576/1096 Doc ID 13902 Rev 12
Table 154. Block-oriented write protection commands
CMD
index
Type Argument
Response
format
Abbreviation Description
CMD28 ac
[31:0] data
address
R1b SET_WRITE_PROT
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).
CMD29 ac
[31:0] data
address
R1b CLR_WRITE_PROT
If the card provides write protection
features, this command clears the write
protection bit of the addressed group.
CMD30 adtc
[31:0] write
protect data
address
R1 SEND_WRITE_PROT
If the card provides write protection
features, this command asks the card to
send the status of the write protection
bits.
CMD31 Reserved
Table 155. Erase commands
CMD
index
Type Argument
Response
format
Abbreviation Description
CMD32
...
CMD34
Reserved. These command indexes cannot be used in order to maintain backward compatibility with older
versions of the MultiMediaCard.
CMD35 ac [31:0] data address R1 ERASE_GROUP_START
Sets the address of the first erase
group within a range to be selected
for erase.
CMD36 ac [31:0] data address R1 ERASE_GROUP_END
Sets the address of the last erase
group within a continuous range to be
selected for erase.
CMD37
Reserved. This command index cannot be used in order to maintain backward compatibility with older
versions of the MultiMediaCards
CMD38 ac [31:0] stuff bits R1 ERASE
Erases all previously selected write
blocks.
Table 156. I/O mode commands
CMD
index
Type Argument
Response
format
Abbreviation Description
CMD39 ac
[31:16] RCA
[15:15] register
write flag
[14:8] register
address
[7:0] register data
R4 FAST_IO
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.

ST STM32F101xx Specifications

General

Brand	ST
Model	STM32F101xx
Category	Microcontrollers
Language	English