ST STM32L4x6 User Manual

SD/SDIO/MMC card host interface (SDMMC) RM0351
1428/1693 DocID024597 Rev 3
Table 239. 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 240. 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.
CMD40 bcr [31:0] stuff bits R5 GO_IRQ_STATE Places the system in the interrupt mode.
CMD41 Reserved
Table 241. Lock card
CMD
index
Type Argument
Response
format
Abbreviation Description
CMD42 adtc [31:0] stuff bits R1b LOCK_UNLOCK
Sets/resets the password or locks/unlocks
the card. The size of the data block is set
by the SET_BLOCK_LEN command.
CMD43
...
CMD54
Reserved

ST STM32L4x6 Specifications

General

Brand	ST
Model	STM32L4x6
Category	Microcontrollers
Language	English