ST25R3916 datasheet(91/157 Pages) STMICROELECTRONICS

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DS12484 Rev 4

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ST25R3916/7

Application information

156

4.5.22

No-response timer register 1

Address: 10h

Type: RW

4.5.23

No-response timer register 2

Address: 11h

Type: RW

Table 49. No-response timer register 1

Bit

Name

Default

Function

Comments

7nrt15

No-response timer definition

MSB bits

nrt_step = 0:

Step: 64 / fc (4.72 μs),

Range: 309 ms

nrt_step = 1:

Step: 4096 / fc (302 µs)

Range: 19.8 s.

Defines timeout after end of Tx. If this timeout

expires without detecting a response a

No-response interrupt is sent.

In NFC mode the No-response timer is started

only when external field is detected. In the

NFCIP-1 active communication mode the

No-response timer is automatically started when

the transmitter is turned off after the message has

been sent.

All 0: No-response timer is not started.

No-response timer is reset and restarted with

Start No-response timer direct command.

6nrt14

5nrt13

4nrt12

3nrt11

2nrt10

1nrt9

0nrt8

Table 50. No-response timer register 2

Bit

Name

Default

Function

Comments

7nrt7

No-response timer definition

LSB bits

6nrt6

5nrt5

4nrt4

3nrt3

2nrt2

1nrt1

0nrt0

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