WM8976 datasheet(94/108 Pages) WOLFSON

94 / 108 page

WM8976

Pre-Production

PP Rev 3.0 April 2006

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

40 (28h)

8:0

00000000

Reserved

8:4

00000

Reserved

41 (29h)

3:0

DEPTH3D

0000

Stereo depth

0000: 0% (minimum 3D effect)

0001: 6.67%

....

1110: 93.3%

1111: 100% (maximum 3D effect)

3D Stereo

Enhancement

8:6

000

Reserved

MUTERPGA

2INV

Mute input to INVROUT2 mixer

Analogue

Outputs

INVROUT2

Mute input to INVROUT2 mixer

Analogue

Outputs

3:1

BEEPVOL

000

AUXR input to ROUT2 inverter gain

000 = -15dB

...

111 = +6dB

Analogue

Outputs

43 (2Bh)

BEEPEN

0 = mute AUXR beep input

1 = enable AUXR beep input

Analogue

Outputs

MBVSEL

Microphone Bias Voltage Control

0 = 0.9 * AVDD

1 = 0.6 * AVDD

Input Signal

Path

7:3

00000

Reserved

L2_2INP

PGA

Connect L2 pin to input PGA positive terminal.

0=L2 not connected to input PGA

1=L2 connected to input PGA amplifier positive

terminal (constant input impedance).

Input Signal

Path

LIN2INP

PGA

Connect LIN pin to input PGA negative terminal.

0=LIN not connected to input PGA

1=LIN connected to input PGA amplifier negative

terminal.

Input Signal

Path

44 (2Ch)

LIP2INP

PGA

Connect LIP pin to input PGA amplifier positive

terminal.

0 = LIP not connected to input PGA

1 = input PGA amplifier positive terminal

connected to LIP (constant input impedance)

Input Signal

Path

INPPGA

UPDATE

N/A

INPPGAVOLL and INPPGAVOLR volume do not

update until a 1 is written to INPPGAUPDATE (in

reg 45 or 46)

Input Signal

Path

INPPGAZCL

Input PGA zero cross enable:

0=Update gain when gain register changes

1=Update gain on 1

st zero cross after gain register

write.

Input Signal

Path

INPPGA

MUTEL

Mute control for input PGA:

0=Input PGA not muted, normal operation

1=Input PGA muted (and disconnected from the

following input BOOST stage).

Input Signal

Path

45 (2Dh)

5:0

INPPGA

VOLL

010000

Input PGA volume

000000 = -12dB

000001 = -11.25db

010000 = 0dB

111111 = 35.25dB

Input Signal

Path

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