wm8731

Description

Aduio codec

Register Map

Name

Address

Type

Access

Default

Description

LEFT_IN

0x00

uint16

W

0x0097

Left line in control

RIGHT_IN

0x01

uint16

W

0x0097

Right line in control

LEFT_OUT

0x02

uint16

W

0x0079

Left Headphone Out control

RIGHT_OUT

0x03

uint16

W

0x0079

Right Headphone Out control

AN_PATH

0x04

uint16

W

0x000A

analog audio path control

DIG_PATH

0x05

uint16

W

0x0008

Digital audio path control

POWER_DWN

0x06

uint16

W

0x009F

Power Down control

DIG_IFACE

0x07

uint16

W

0x009F

Digital audio interface format

SAMPLE

0x08

uint16

W

0x0000

Sampling control

ACTIVE

0x09

uint16

W

0x0000

Active Control

RESET

0x0F

uint16

W

0x0FFF

Reset control

Registers

LEFT_IN

Address:

[0x00]

Default:

[0x0097]

Left line in control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

LRINBOTH

MUTE

VOLUME

Flags

MUTE:

Mutes Left input

LRINBOTH:

Left to Right Channel Line Input Volume and Mute Data Load Control

Fields

VOLUME:

Volume control for Left input in 1.5dB steps range -34.5dB -> +12dB

Name

Value

Descriptions

MIN

b00000

-34.5dB

0dB

b10101

0db Gain

MAX

b11111

+12dB

STEP

b00001

1.5dB Step

RIGHT_IN

Address:

[0x01]

Default:

[0x0097]

Right line in control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

LRINBOTH

MUTE

VOLUME

Flags

MUTE:

Mutes Right input

LRINBOTH:

Left to Right Channel Line Input Volume and Mute Data Load Control

Fields

VOLUME:

Volume control for right input in 1.5dB steps range -34.5dB -> +12dB

Name

Value

Descriptions

MIN

b00000

minimum -34.5dB

0dB

b10101

0db Gain

MAX

b11111

maximum +12dB

STEP

b00001

1.5dB Step

LEFT_OUT

Address:

[0x02]

Default:

[0x0079]

Left Headphone Out control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

Fields

LEFT_OUT:

Left Headphone Out control

RIGHT_OUT

Address:

[0x03]

Default:

[0x0079]

Right Headphone Out control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

Fields

RIGHT_OUT:

Right Headphone Out control

AN_PATH

Address:

[0x04]

Default:

[0x000A]

analog audio path control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

SIDEATT

SIDETONE

DACSEL

BYPASS

INSEL

MUTEMIC

MICBOOST

Flags

MICBOOST:

Microphone Input Level Boost

MUTEMIC:

Mute Mic input to ADC

INSEL:

Selects input between Mic and Line-in

BYPASS:

Combines Line-in signal to Output

DACSEL:

DAC Select

SIDETONE:

Combines Mic signal to Output

Fields

SIDEATT:

Side Tone attenuation

Name

Value

Descriptions

6dB

b00

6dB of attenuation

9dB

b01

9dB of attenuation

12dB

b10

12dB of attenuation

15dB

b11

15dB of attenuation

DIG_PATH

Address:

[0x05]

Default:

[0x0008]

Digital audio path control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

HPOR

DACMU

DEEMP

ADCHPD

Flags

ADCHPD:

ADC High Pass Filter

DACMU:

DAC Soft Mute

HPOR:

Store dc offset when High Pass Filter disabled

Fields

DEEMP:

De-emphasis Control

Name

Value

Descriptions

DIS

b00

Disable

32kHz

b01

32 kHz

44_1kHz

b10

44.1 kHz

48kHz

b11

48 kHz

POWER_DWN

Address:

[0x06]

Default:

[0x009F]

Power Down control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

POWEROFF

CLKOUTPD

OSCPD

OUTPD

DACPD

ADCPD

MICPD

LINEINPD

Flags

LINEINPD:

Line Input Power Down

MICPD:

Microphone Input an Bias PowerDown

ADCPD:

ADC Power Dow

DACPD:

DAC Power Down

OUTPD:

Powers down ALL outputs including digital

OSCPD:

Oscillator Power Down

CLKOUTPD:

CLKOUT power down

POWEROFF:

POWEROFF mode

DIG_IFACE

Address:

[0x07]

Default:

[0x009F]

Digital audio interface format

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

BLCKINV

MASTER_MODE

LRSWAP

LRP

IWL

FORMAT

Flags

BLCKINV:

Inverts the bit clock

MASTER_MODE:

Enables Master mode

LRSWAP:

Swaps LR clock polarity

LRP:

DACLRC phase control (in left, right or I2S modes)

Fields

IWL:

Word Length. Audio data size

Name

Value

Descriptions

32BIT

b11

32 bit sample size

24BIT

b10

24 bit sample size

20BIT

b01

20 bit sample size

16BIT

b00

16 bit sample size
FORMAT:

Selects digital audio format

Name

Value

Descriptions

RIGHT_JUST

b00

MSB-First right justified

LEFT_JUST

b01

MSB-first left justified

I2S

b10

I2S format. MSB-First left -1 justified

DSP

b11

DSP Mode. frame sync + 2 data packed words

SAMPLE

Address:

[0x08]

Default:

[0x0000]

Sampling control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

Fields

SAMPLE:

Sampling control

ACTIVE

Address:

[0x09]

Default:

[0x0000]

Active Control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

Enable

Flags

Enable:

Enables Digital Audio interface

RESET

Address:

[0x0F]

Default:

[0x0FFF]

Reset control

Bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Field

RESET

Fields

RESET:

Setting to 0 resets the device