ST25R95 datasheet(15/61 Pages) STMICROELECTRONICS

15 / 61 page

Note:

There is no ‘Field ON’ command. When the application selects an RF communication protocol, the field

automatically switches ON if the Reader state is selected.

When the application selects a protocol, the ST25R95 performs all necessary settings: it will choose the

appropriate reception and transmission chains, switch ON or OFF the RF field and connect the antenna

accordingly.

Different protocols have different sets of parameters. Values for the <Parameters> field are listed in Table 12.

Table 12. List of <Parameters> values for the ProtocolSelect command for different protocols (Reader)

Protocol

Code

Parameters

Examples of commands

Byte

Bit

Function

Field OFF

0x00

7:0

RFU

>>>0x020100

ISO/IEC 15693

NFC Forum Tag Type 5

0x01

7:6

RFU

H 100 S:

>>>0x02 02 01 01

H 100 D:

>>>0x02 02 01 03

H 10 S:

>>>0x02 02 01 05

H 10 D:

>>>0x02 02 01 07

L 100 S:

>>>0x02 02 01 21

L 100 D:

>>>0x02 02 01 23

L 10 S:

>>>0x02 02 01 25

L 10 D:

>>>0x02 02 01 27

In these examples, the CRC is

automatically appended.

5:4

00: 26 Kbps (H)

01: 52 Kbps

10: 6 Kbps (L)

11: RFU

0: Respect 312-µs delay

1: Wait for SOF

0: 100% modulation (100)

1: 10% modulation (10)

0: Single subcarrier (S)

1: Dual subcarrier (D)

0: no CRC appended

1: automatically append CRC

ISO/IEC 14443 Type A

NFC Forum Tag Type 1

(Topaz)

NFC Forum Tag Type 2

NFC Forum Tag Type

0x02

7:6

Transmission data rate

00: 106 Kbps

01: 212 Kbps

10: 424 Kbps

11: RFU

>>>0x02020200: ISO/IEC 14443

Type A tag, 106 Kbps transmission and

reception rates, FDT 86/90 µs

5:4

Reception data rate

00: 106 Kbps

01: 212 Kbps

10: 424 Kbps

11: RFU

3:0

RFU

7:0

(0x00 - 0x0E, other values RFU)

When there is PP, MM must also be

provided.

These 3 bytes are optional. The default

PP:MM:DD value is 0

(corresponds to FDT 86/90µs).

For other values, FDT = (2^PP)*(MM

+1)*(DD+128) *32/13.56 µs

7:0

DD (0x00 - 0x7F, other values RFU)

ST25R95

Protocol select command (0x02) description

DS12807 - Rev 4

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