AD1981B

Rev. C | Page 28 of 32

Table 41. Jack Sense Mute Select—JSMT [2:0]

Ref

JS1

Headphone

JS0

LINE_OUT

JSMT2

JSMT1

JSMT0

HP_OUT

LINE_OUT

MONO_OUT

Notes

0

OUT (0)

OUT (0)

0

0

0

ACTIVE

ACTIVE

ACTIVE

JS0 and JS1 ignored.

1

OUT (0)

IN (1)

0

0

0

ACTIVE

ACTIVE

ACTIVE

2

IN (1)

OUT (0)

0

0

0

ACTIVE

ACTIVE

ACTIVE

3

IN (1)

IN (1)

0

0

0

ACTIVE

ACTIVE

ACTIVE

4

OUT (0)

OUT (0)

0

0

1

FMUTE

FMUTE

ACTIVE

JS0 no mute action;

JS1 mutes Line_Out.

5

OUT (0)

IN (1)

0

0

1

FMUTE

ACTIVE

ACTIVE

6

IN (1)

OUT (0)

0

0

1

ACTIVE

FMUTE

ACTIVE

7

IN (1)

IN (1)

0

0

1

ACTIVE

FMUTE

ACTIVE

8

OUT (0)

OUT (0)

0

1

0

FMUTE

FMUTE

ACTIVE

JS0 no mute action;

JS1 mutes Mono and

Line-Out.

9

OUT (0)

IN (1)

0

1

0

FMUTE

ACTIVE

ACTIVE

10

IN (1)

OUT (0)

0

1

0

ACTIVE

FMUTE

FMUTE

11

IN (1)

IN (1)

0

1

0

ACTIVE

FMUTE

FMUTE

12

OUT (0)

OUT (0)

0

1

1

**

**

**

**Reserved.

13

OUT (0)

IN (1)

0

1

1

**

**

**

14

IN (1)

OUT (0)

0

1

1

**

**

**

15

IN (1)

IN (1)

0

1

1

**

**

**

16

OUT (0)

OUT (0)

1

0

0

FMUTE

FMUTE

ACTIVE

JS0 mutes Mono;

JS1 no mute action.

17

OUT (0)

IN (1)

1

0

0

FMUTE

ACTIVE

FMUTE

18

IN (1)

OUT (0)

1

0

0

ACTIVE

FMUTE

ACTIVE

19

IN (1)

IN (1)

1

0

0

ACTIVE

ACTIVE

FMUTE

20

OUT (0)

OUT (0)

1

0

1

FMUTE

FMUTE

ACTIVE

JS0 mutes Mono;

JS1 mutes Line-Out.

21

OUT (0)

IN (1)

1

0

1

FMUTE

ACTIVE

FMUTE

22

IN (1)

OUT (0)

1

0

1

ACTIVE

FMUTE

ACTIVE

23

IN (1)

IN (1)

1

0

1

ACTIVE

FMUTE

FMUTE

24

OUT (0)

OUT (0)

1

1

0

FMUTE

FMUTE

ACTIVE

JS0 mutes Mono;

JS1 mutes Mono and

Line-Out.

25

OUT (0)

IN (1)

1

1

0

FMUTE

ACTIVE

FMUTE

26

IN (1)

OUT (0)

1

1

0

ACTIVE

FMUTE

FMUTE

27

IN (1)

IN (1)

1

1

0

ACTIVE

FMUTE

FMUTE

28

OUT (0)

OUT (0)

1

1

1

**

**

**

**Reserved.

29

OUT (0)

IN (1)

1

1

1

**

**

**

30

IN (1)

OUT (0)

1

1

1

**

**

**

31

IN (1)

IN (1)

1

1

1

**

**

**

FMUTE = Output is forced to mute independent of the respective volume register setting.

ACTIVE = Output is not muted, and its status is dependent on the respective volume register setting.

OUT = Nothing plugged into the jack and, therefore, the JS status is low (via the load resistor pull-down).

IN = Jack has plug inserted and, therefore, the JS status is high (via the codec JS internal pull-up).