AN3955 datasheet(32/68 Pages) STMICROELECTRONICS

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ISO/IEC 14443-3 layers

AN3955

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Doc ID 022017 Rev 1

The ISO14443A_AnticollisionLevel3 function sends an anticollision (level 3)

command to a contactless tag.

Table 39 describes the ISO14443A_AnticollisionLevel3 function.

Table 39.

ISO14443A_AnticollisionLevel3 function description

The ISO14443A_SelectLevel1 function sends a Select (level 1) command to a

contactless tag. Table 40 describes the ISO14443A_SelectLevel1 function.

Table 40.

ISO14443A_SelectLevel1 function description

The ISO14443A_SelectLevel2 function sends a Select (level 2) command to a

contactless tag. Table 41 describes the ISO14443A_SelectLevel2 function.

Table 41.

ISO14443A_SelectLevel2 functiond description

Prototype

int8_t ISO14443A_AnticollisionLevel3 (uint8_t

*pResponse);

Input parameter

None

Output parameter

pResponse: Pointer to the CR95HF response

Return parameter

RESULTOK: The anticollision (level 3) command is successfully emitted to a

contactless tag.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns an error

code.

Prototype

int8_t ISO14443A_SelectLevel1 (uc8 NbByteUIDin,

uc8*UIDin, uint8_t*pResponse);

Input parameter

NbByteUIDin: Number of bytes of UID in parameter

UIDin: Pointer of contacless tag UID

Output parameter

pResponse: Pointer to the CR95HF response

Return parameter

RESULTOK: The Select (level 1) command is successfully emitted to a

contactless tag.

ISO14443A_ERRORCODE_PARAMETER: NbByteUIDin is incorrect.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns an error

code.

Prototype

int8_t ISO14443A_SelectLevel2 (uc8 NbByteUIDin,

uc8*UIDin, uint8_t*pResponse);

Input parameter

NbByteUIDin: Number of bytes of UIDin parameter

UIDin: Pointer of contacless tag UID

Output parameter

pResponse: Pointer to the CR95HF response

Return parameter

RESULTOK: The Select (level 2) command is successfully emitted to a

contactless tag.

ISO14443A_ERRORCODE_PARAMETER: NbByteUIDin is incorrect.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns an error

code.

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