AN3955 datasheet(35/68 Pages) STMICROELECTRONICS

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AN3955

ISO/IEC 14443-3 layers

Doc ID 022017 Rev 1

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The ISO14443A_Is14443_4Compatible function returns RESULTOK if the bit

Contactless Tag

is compliant with ISO/IEC 14443_4. Otherwise, the

ISO14443A_Is14443_4Compatible

function returns ERRORCODE_GENERIC. Table 47

describes the ISO14443A_Is14443_4Compatible function.

Table 47.

ISO14443A_Is14443_4Compatible function description

The ISO14443A_IsUIDComplete function returns RESULTOK if the UID is complete.

Otherwise, the ISO14443A_IsUIDComplete function returns ERRORCODE_GENERIC.

Table 48 describes the ISO14443A_IsUIDComplete function.

Table 48.

ISO14443A_IsUIDComplete function description

The ISO14443A_IsPresent function returns RESULTOK if a 14443 Type A contactless

tag is present into RF field. Otherwise, the ISO14443A_IsPresent function returns

ERRORCODE_GENERIC

. Table 49 describes the ISO14443A_IsPresent function.

Table 49.

ISO14443A_IsPresent function description

Prototype

int8_t ISO14443A_Is14443_4Compatible(uc8 SAKbyte);

Input parameter

SAKbyte: Contactless tag response to the Select command

Output parameter

None

Return parameter

RESULTOK: The contactless tag is compatible with ISO/IEC 14443_4.

ERRORCODE_GENERIC: The contactless tag is not compatible with the

ISO/IEC 14443_4.

Prototype

int8_t ISO14443A_IsUIDComplete(uc8 SAKbyte);

Input parameter

SAKbyte: Contactless tag response to select command

Output parameter

None

Return parameter

RESULTOK: UID is complete. The anti-collision loop is over.

ERRORCODE_GENERIC: UID is not complete.

Prototype

int8_tISO14443A_IsPresent (void);

Input parameter

None

Output parameter

None

Return parameter

RESULTOK: An ISO/IEC 14443 Type A contactless tag is present.

ERRORCODE_GENERIC: No ISO/IEC 14443 Type A contactless tag

available

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