SDI Technologies SDIO Card User Manual
©Copyright 2000-2007 SD Card Association
SDIO Simplified Specification Version 2.00
20
identify it as an I/O only response.
I/O specific status is reported by I/O response and Memory specific status is reported by Memory response
except for the following case: In the SD bus mode, the card shall not respond to an Illegal Command or a
command with a CRC error. The indication of those two error cases shall be given by the card in the following
command’s response. This is true for an I/O only card as well as for combo cards, even in cases where the
erroneous command and the command that follows are not targeting the same card module (Memory or I/O).
I/O specific status is reported by I/O response and Memory specific status is reported by Memory response
except for the following case: In the SD bus mode, the card shall not respond to an Illegal Command or a
command with a CRC error. The indication of those two error cases shall be given by the card in the following
command’s response. This is true for an I/O only card as well as for combo cards, even in cases where the
erroneous command and the command that follows are not targeting the same card module (Memory or I/O).
Bit
Identifier
Type
Value
Description
Clear
Condition
31
OUT_OF_RANGE
E R
’0’= no error
’1’= error
’1’= error
The command’s argument was out
of the allowed range for this card.
of the allowed range for this card.
C
30
ADDRESS_ERROR
N/A
0
Not used with SDIO operation
C
29
BLOCK_LEN_ERROR
N/A
0
Not used with SDIO operation
C
28
ERASE_SEQ_ERROR
N/A
0
Not used with SDIO operation
C
27
ERASE_PARAM
N/A
0
Not used with SDIO operation
C
26
WP_VIOLATION
N/A
0
Not used with SDIO operation
C
25
CARD_IS_LOCKED
N/A
0
Not used with SDIO operation
C
24
LOCK_UNLOCK_FAILED
N/A
0
Not used with SDIO operation
C
23
COM_CRC_ERROR
E R
’0’= no error
’1’= error
’1’= error
The CRC check of the previous
command failed. (Note 1)
command failed. (Note 1)
B
22
ILLEGAL_COMMAND
E R
’0’= no error
’1’= error
’1’= error
Previous command not legal for the
card state. (Note 2)
card state. (Note 2)
B
21
CARD_ECC_FAILED
N/A
0
Not used with SDIO operation
C
20
CC_ERROR
N/A
0
Not used with SDIO operation
C
19
ERROR
E R
’0’= no error
’1’= error
’1’= error
A general or an unknown error
occurred during the operation.
occurred during the operation.
C
18
UNDERRUN
N/A
0
Not used with SDIO operation
C
17
OVERRUN
N/A
0
Not used with SDIO operation
C
16
CID/ CSD_OVERWRITE
N/A
0
Not used with SDIO operation
C
15
WP_ERASE_SKIP
N/A
0
Not used with SDIO operation
C
14
CARD_ECC_DISABLED
N/A
0
Not used with SDIO operation
C
13
ERASE_RESET
N/A
0
Not used with SDIO operation
C
12:9
CURRENT_STATE
S X
15=I/O only
For an I/O only card, the current
state shall be fixed at a value of
0x0F. This indicates that it is an I/O
only card and the normal memory
states do not apply
state shall be fixed at a value of
0x0F. This indicates that it is an I/O
only card and the normal memory
states do not apply
B
8
READY_FOR_DATA
N/A
0
Not used with SDIO operation
C
7:6
Reserved
5
APP_CMD
N/A
0
CMD55 not used in SDIO operation
C
4
Reserved
3
AKE_SEQ_ERROR (SD
Memory Card app. spec.)
Memory Card app. spec.)
N/A
0
Not used with SDIO operation
C
2
Reserved for application specific commands
1, 0
Reserved for manufacturer test mode
Table 4-7 SDIO Status Register Structure
Note 1: In the SPI mode, if the card detects a CRC error, it returns a com CRC error in the R1 response
immediately following the command (see Figure 3-7). In this situation, the note that the CRC error is for the
previous command does not apply.
Note 2: In the SPI mode, if the card detects an Illegal Command, it returns an Illegal Command error in the R1
response immediately following the command (see Figure 3-7). In this situation, the note that the Illegal
Command error is for the previous command does not apply.