AN3955 datasheet(17/68 Pages) STMICROELECTRONICS

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AN3955

CR95HF low level layer

Doc ID 022017 Rev 1

17/68

Table 7 describes the ProtocolSelect command in ISO/IEC 14443-3 Type A case.

Table 8 describes the ProtocolSelect command in ISO/IEC 14443-3 Type B case.

Table 8.

CR95HF_ProtocolSelect ISO14443-3 Type B protocol parameter

Table 7.

CR95HF_ProtocolSelect ISO/IEC 14443-3 Type A protocol parameter

Parameter name

Byte

Bit

Value

Example

Command Code

7:0

0x02

0x02020200

ISO/IEC 14443-3 Type

A with reception and

transmission data

rates at 106 kbps

Length

7:0

0x02

Protocol

7:0

0x02

: ISO/IEC 14443-3 Type A

protocol

Parameter

7:6

Transmission data rate

5:4

Reception data rate

3:0

RFU

5:4

7:0

FWT= (256*16/fc)*(2*PP)*(MM+1)(1) (2)

where “PP” represents byte 4 and “MM”

byte 5.

Optional. If not specify default FWT~86 µs

PP <= 0x0E and 0x01 <= MM <= 0xFE

Parameter name Byte

Bit

Value

Example

Command Code

7:0

0x02

0x02020301

ISO/IEC 14443-3 Type

B with reception and

transmission data

rates at 106 kbps

The CR95HF

manages the CRC.

Length

7:0

0x02

Protocol

7:0

0x03

: ISO/IEC 14443-3 Type B protocol

Parameter

7:6

Transmission data rate

5:4

Reception data rate

3:0

RFU

Append CRC

1: CR95HF appends CRC

0: CR95HF does not append CRC

5:4

7:0

FWT= (256*16/fc)*(2*PP)*(MM+1)(1) (2)

where “PP” represents byte 4 and “MM”

byte 5.

Optional. If not specify default FWT~300µs.

PP <= 0x0E and 0x01 <= MM <= 0xFE

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