AS3911 datasheet(85/159 Pages) AMSCO

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ams Datasheet

Page 85

[v2-11] 2016-Jun-13

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AS3911 − Application Information

No-Response Timer Register 1

Figure 65:

No-Response Timer Register 1

Note(s):

1. Default setting is set at power-up and after Set Default command.

No-Response Timer Register 2

Figure 66:

No-Response Timer Register 2

Address 0Fh: No-Response Timer Register 1

Type: RW

Bit

Name

Default

Function

Comments

7nrt15

No-Response Timer definition MSB

bits

Defined in steps of 64/fc (4.72 μs).

Range from 0 to 309 ms

In case bit nrt_step in General

Purpose and No-Response Timer

Control Register is set the step is

changed to 4096/fc

Defines timeout after end of Tx.

In case 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

Address 10h: No-Response Timer Register 2

Type: RW

Bit

Name

Default

Function

Comments

7nrt7

No-Response Timer definition

LSB bits

6nrt6

5nrt5

4nrt4

3nrt3

2nrt2

1nrt1

0nrt0

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