STRFNFCA datasheet(20/74 Pages) STMICROELECTRONICS

20 / 74 page

Commands

STRFNFCA

20/74

Doc ID 023077 Rev 10

ISO/IEC 18092

NFC Forum Tag

Type 3

0x04

7:6

Transmission data rate

: RFU

: 212 Kbps

: 424 Kbps

: RFU

>>>0x02020451

ISO/IEC18092 tag, 212 Kbps

transmission and reception

rates with CRC appended.

Parameter ‘Slot counter’ is not

mandatory. If it is not present, it

is assumed that SlotCounter =

0x00

(1 slot)

For device detection

commands, byte 1 bit 4 must be

set to ‘0’. In this case, the FWT

is 2.4 ms for the 1st slot and

1.2 ms more for each following

slot, if slot counter is specified.

If slot counter = 0x10, the

STRFNFCA does not respect

reply timings, but polls

incoming data and searches a

valid response during ~8.4 ms.

5:4

Reception data rate

: RFU

: 212 Kbps

: 424 Kbps

: RFU

3:1

RFU

Append CRC if set to ‘1’.

(1)

7:5

RFU

0: FWT = 2.4 ms

1: FWT is specified by

PP:MM bits

3:0

Slot counter

: 1 slot

: 2 slots

…

: 16 slots

2,3

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 ~ 302 µs

It is recommended to set this bit to ‘1’.

Not characterized.

Max TR1 (Synchronization Time as defined in ISO/IEC 14443-2, Type B) supported by the STRFNFCA is

170 µs. This value will be increased to 302 µs in the next STRFNFCA revision.

Table 9.

List of <Parameters> values for the PROTOCOLSELECT command for

different protocols (Reader) (continued)

Protocol

Code

Parameters

Examples of commands

Byte

Bit

Function

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