AN3955 datasheet(28/68 Pages) STMICROELECTRONICS

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ISO/IEC 14443-3 layers

AN3955

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Doc ID 022017 Rev 1

5.1.5

Functions of ISO/IEC 14443_A layer

The lib_iso14443A.c file includes all the commands defined in the ISO/IEC 14443-3

Type A specifications.

Table 27 lists the command to configure the CR95HF in order to communicate with an

ISO/IEC 14443-3 Type A tag.

Table 28 lists the functions of this layer which emit an ISO/IEC 14443-3 Type A command.

A CR95HF response includes different information fields extracted by the following

functions. Table 29 describes the ISO14443A_ProtocolSelect function.

Table 29.

ISO14443A_ProtocolSelect function description

Table 27.

Configuration of the CR95HF

Function

Description

ISO14443A_ProtocolSelect

Configures CR95HF to communicate with an ISO/IEC

14443 Type A contactless tag.

Table 28.

ISO/IEC 14443-3 Type A layer function description

Function

Description

ISO14443A_REQA

Sends a REQA command to a contactless tag.

ISO14443A_WUPA

Sends a WUPA command to a contactless tag.

ISO14443A_HLTA

Sends an HLTA command to a contactless tag.

ISO14443A_AntiCollisionLevel1

Sends an anti-collision command (Level 1) to a

contactless tag.

ISO14443A_AntiCollisionLevel2

Sends an anti-collision command (Level 2) to a

contactless tag.

ISO14443A_AntiCollisionLevel3

Sends an anti-collision command (Level 3) to a

contactless tag.

ISO14443A_SelectLevel1

Sends a select command (Level 1) to a contactless tag.

ISO14443A_SelectLevel2

Sends a select command (Level 2) to a contactless tag.

ISO14443A_SelectLevel3

Sends a select command (Level 3) to a contactless tag.

Function

Description

ISO14443A_ProtocolSelect

Configures CR95HF to communicate with an ISO/IEC

14443 Type A contactless tag.

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