AN3955 datasheet(31/68 Pages) STMICROELECTRONICS

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AN3955

ISO/IEC 14443-3 layers

Doc ID 022017 Rev 1

31/68

The ISO14443A_HLTA function sends an HLTA command to a contactless tag. Table 36

describes the ISO14443A_HLTA function.

Table 36.

ISO14443A_HLTA function description

The ISO14443A_AnticollisionLevel1 function sends an anticollision (level 1)

command to a contactless tag.

Table 37 describes the ISO14443A_AnticollisionLevel1 function.

Table 37.

ISO14443A_AnticollisionLevel1 function description

The ISO14443A_AnticollisionLevel2 function sends an anticollision (level 2)

command to a contactless tag.

Table 38 describes the ISO14443A_AnticollisionLevel2 function.

Table 38.

ISO14443A_AnticollisionLevel2 function description

Prototype

int8_t ISO14443A_HLTA (uint8_t *pResponse);

Input parameter

None

Output parameter

pResponse: Pointer to the CR95HF response

Return parameter

RESULTOK: The HLTA command is successfully emitted to a contactless tag.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns an error

code

Prototype

int8_t ISO14443A_AnticollisionLevel1 (uint8_t

*pResponse);

Input parameter

None

Output parameter

pResponse: Pointer to the CR95HF response

Return parameter

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

contactless tag.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns an error

code.

Prototype

int8_t ISO14443A_AnticollisionLevel2 (uint8_t

*pResponse);

Input parameter

None

Output parameter

pResponse: Pointer to the CR95HF response

Return parameter

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

contactless tag.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns an error

code.

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