AN3955 datasheet(34/68 Pages) STMICROELECTRONICS

34 / 68 page

ISO/IEC 14443-3 layers

AN3955

34/68

Doc ID 022017 Rev 1

5.1.9

ISO/IEC 14443-3 Type A Is function

The Is functions return RESULTOK if the function is successful, otherwise the Is functions

return ERRORCODE_GENERIC.

The Is functions return RESULTOK if the bit collision is detected. The

ISO14443A_IsCollisionDetected

function returns RESULTOK if the bit

CollisionDetected

of the CR95HF control byte is set.

Table 44 describes the ISO14443A_IsCollisionDetected function.

Table 44.

ISO14443A_IsCollisionDetected function description

The ISO14443A_IsCRCError function returns RESULTOK if the bit CRC Error of

CR95HF control bytes is set. Otherwise, the ISO14443A_IsCRCError function returns

ERRORCODE_GENERIC

. Table 45 describes the ISO14443_IsCRCError function.

Table 45.

ISO14443A_IsCRCError function description

The ISO14443A_IsParityError function returns RESULTOK if the bit Parity Error

of CR95HF control bytes is set. Otherwise, the ISO14443A_IsParityError function

returns ERRORCODE_GENERIC. Table 46 describes the ISO14443A_IsParityError

function.

Table 46.

ISO14443A_IsParityError function description

Prototype

int8_t ISO14443A_IsCollisionDetected(uc8*CR95HFContr

olByteIndex);

Input parameter

CR95HFControlByteIndex: Pointer to the CR95HF control byte (3 bytes)(1).

Three control bytes are appended by CR95HF to contactless tag response. Refer to Table 12: CR95HF

success response value for ISO/IEC 14443-3 Type A.

Output parameter None

Return parameter

RESULTOK: CollisionDetected bit is set.

ERRORCODE_GENERIC: CollisionDetected bit is reset.

Prototype

int8_t ISO14443A_IsCRCError(uc8*CR95HFControlByteI

ndex);

Input parameter

CR95HFControlByteIndex: Pointer of the CR95HF control bytes (3 bytes)(1).

Three control bytes are appended by CR95HF to contactless tag response. Refer to Table 12: CR95HF

success response value for ISO/IEC 14443-3 Type A.

Output parameter

None

Return parameter

RESULTOK: CRC Error bit is set.

ERRORCODE_GENERIC: CRC Error bit is reset.

Prototype

int8_t ISO14443A_IsParityError(uc8*CR95HFControlByte

Index);

Input parameter

CR95HFControlByteIndex: Pointer on CR95HF control bytes (3 bytes)(1).

Three control bytes are appended by CR95HF to contactless tag response. Refer to Table 12: CR95HF

success response value for ISO/IEC 14443-3 Type A.

Output parameter None

Return parameter

RESULTOK: Parity Error bit is set.

ERRORCODE_GENERIC: Parity Error bit is reset.

AN3955 bảng dữ liệu(PDF) 34 Page - STMicroelectronics

AN3955 bảng dữ liệu(HTML) 34 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

bảng dữ liệu tải về

Link URL