STRFNFCA datasheet(18/74 Pages) STMICROELECTRONICS

18 / 74 page

Commands

STRFNFCA

18/74

Doc ID 023077 Rev 10

Table 9.

List of <Parameters> values for the PROTOCOLSELECT command for

different protocols (Reader)

Protocol

Code

Parameters

Examples of commands

Byte

Bit

Function

Field OFF

0x00

07:0

RFU

>>>0x02020000

ISO/IEC 15693

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

: 26 Kbps (H)

: 52 Kbps

: 6 Kbps (L)

: RFU

: Respect 312-µs delay

: Wait for SOF (1)

: 100% modulation (100)

: 10% modulation (10)

: Single subcarrier (S)

: Dual subcarrier (D)

Append CRC if set to ‘1’.

(1)

ISO/IEC 14443

Type A

NFC Forum Tag

Type 1

(Topaz)

NFC Forum Tag

Type 2

NFC Forum Tag

Type 4A

0x02

7:6

Transmission data rate

: 106 Kbps

: 212 Kbps (2)

: 424 Kbps

: RFU

>>>0x02020200

: ISO/IEC

14443 Type A tag, 106 Kbps

transmission and reception

rates, Time interval 86/90

Note that REQA, WUPA,

Select20 and Select70

commands use a fixed interval

of 86/90 µs between a request

and its reply. Other commands

use a variable interval with fixed

granularity.

Refer to the ISO/IEC 14443

standard for more details.

5:4

Reception data rate

: 106 Kbps

: 212 Kbps (2)

: 424 Kbps

: RFU

3RFU

2:0

RFU

1, 2

AFDT (Optional) 2 bytes

0xPP 0xMM

Set the maximum

STRFNFCA listening time

so that it fits the maximum

ISO FWT:

0xPP

≤0x0E,

0x01

≤0xMM ≤0xFE

Frame Waiting Time (FWT) =

(2PP) *(MM+1) * 4096/13.56 µs

If AFDT is not specified,

the default FWT is ~ 86 µs

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