ST STM32L4x6 User Manual

SD/SDIO/MMC card host interface (SDMMC) RM0351
1418/1693 DocID024597 Rev 3
41.4.11 Card status register
The response format R1 contains a 32-bit field named card status. This field is intended to
transmit the card status information (which may be stored in a local status register) to the
host. If not specified otherwise, the status entries are always related to the previously issued
command.
Table 228 defines the different entries of the status. The type and clear condition fields in
the table are abbreviated as follows:
Type:
• E: error bit
• S: status bit
• R: detected and set for the actual command response
• X: detected and set during command execution. The SDMMC card host must poll the
card by issuing the status command to read these bits.
Clear condition:
• A: according to the card current state
• B: always related to the previous command. Reception of a valid command clears it
(with a delay of one command)
• C: clear by read
Table 228. Card status
Bits Identifier Type Value Description
Clear
condition
31
ADDRESS_
OUT_OF_RANGE
E R X
’0’= no error
’1’= error
The command address argument was out
of the allowed range for this card.
A multiple block or stream read/write
operation is (although started in a valid
address) attempting to read or write
beyond the card capacity.
C
30 ADDRESS_MISALIGN
’0’= no error
’1’= error
The commands address argument (in
accordance with the currently set block
length) positions the first data block
misaligned to the card physical blocks.
A multiple block read/write operation
(although started with a valid
address/block-length combination) is
attempting to read or write a data block
which is not aligned with the physical
blocks of the card.
C
29 BLOCK_LEN_ERROR
’0’= no error
’1’= error
Either the argument of a
SET_BLOCKLEN command exceeds the
maximum value allowed for the card, or
the previously defined block length is
illegal for the current command (e.g. the
host issues a write command, the current
block length is smaller than the maximum
allowed value for the card and it is not
allowed to write partial blocks)
C

ST STM32L4x6 Specifications

General

Brand	ST
Model	STM32L4x6
Category	Microcontrollers
Language	English