SDI Technologies SDIO Card Tuple Version, Sdio Card Metaformat, Tuples Supported by Sdio Cards

©Copyright 2000-2007 SD Card Association

SDIO Simplified Specification Version 2.00

16.4Tuple Version

With the introduction of SDIO Specification Version 1.10, a different format for the tuple information is possible based on the changes made by each specification revision. These changes could be added fields in a tuple or entirely new tuples. In order to maintain backward compatibility, new data fields are added after existing fields in order to maximize backward compatibility. It is the responsibility of the host program that is scanning the tuple chain (sometimes called “walking the tuples”) to first determine the SDIO specification version that the card was designed to. The program shall be designed to anticipate that SDIO cards will be encountered that are built to a later version of the specification. This requires the program to ignore the additional data existing in SDIO cards built to a later specification. Specifically, the program shall first read the SDIO specification version that the card was designed to meet from the SDIOx field in the CCCR area. If the version is less than or equal to the version of the tuple scan program, then the program shall know and properly decode all tuple information. If the card version is greater than the scan program’s version, the scan program may need to ignore additional information fields or tuples. The unknown tuples can be ignored by simply skipping those tuples with unrecognized codes. Skipping is accomplished by using the TPL_LINK field (always the second byte) to jump over the unknown tuple. In a similar manner, the additional data fields in tuples should be ignored using the link field. For example, if a scan program is expecting 0x15 bytes of data and the TPL_LINK field indicates a size of 0x19 bytes, the scan program should ignore and skip over the last 4 bytes of data.

16.5SDIO Card Metaformat

Unlike the PCMCIA card, the SDIO card has multiple CIS areas. There is a common CIS for the entire card and a CIS assigned to each function. Because of the multiple CIS areas, the SDIO card does not need to support the CISTPL_LONGLINK_MFC tuple or the CISTPL_LINKTARGET as described in section 2.3.6 of the PCMCIA spec. Table 16-2 lists the tuple codes supported by SDIO cards. The type field indicates if a tuple is Optional (O), Mandatory (M), Recommended (R), or not applicable (n/a) for the common (function 0) tuple and for each function (1-7) supported by the card. For more details on each tuple, see the PCMCIA metaformat specification section referenced.

Code	Name	Description	PCMCIA	Type	Type Function
			Reference	Common
0x00	CISTPL_NULL	Null tuple	3.1.9	O	O
0x10	CISTPL_CHECKSUM	Checksum control	3.1.1	R	R
0x15	CISTPL_VERS_1	Level 1	3.2.10	O	O
		version/product-information
0x16	CISTPL_ALTSTR	The Alternate Language String	3.2.1	O	O
		Tuple
0x20	CISTPL_MANFID	Manufacturer Identification	3.2.9	M	O
		String Tuple
0x21	CISTPL_FUNCID	Function Identification Tuple	3.2.7	n/a	M
0x22	CISTPL_FUNCE	Function Extensions	3.2.6	n/a	M
0x80-		Vendor Unique Tuples	None	O	O
0x8F
0x91	CISTPL_SDIO_STD	Additional information for	6.1.2	n/a	M1:Standard
		functions built to support			SDIO Function
		application specifications for			O1:non-Standard
		standard SDIO functions.			SDIO Function
0x92	CISTPL_SDIO_EXT	Reserved for future use with	6.1.3	n/a	n/a
		SDIO devices.
0xFF	CISTPL_END	The End-of-chain Tuple	3.1.2	M	M

Table 16-2 Tuples Supported by SDIO Cards

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