SDI Technologies SDIO Card manual Sdio Status Register Structure, Clear

©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

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).

					Clear
Bit	Identifier	Type	Value	Description	Condition
31	OUT_OF_RANGE	E R	’0’= no error	The command’s argument was out	C
			’1’= error	of the allowed range for this card.
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	The CRC check of the previous	B
			’1’= error	command failed. (Note 1)
22	ILLEGAL_COMMAND	E R	’0’= no error	Previous command not legal for the	B
			’1’= error	card state. (Note 2)
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	A general or an unknown error	C
			’1’= error	occurred during the operation.
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	B
				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
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	N/A	0	Not used with SDIO operation	C
	Memory Card app. spec.)
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.

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