WM8741 datasheet(46/66 Pages) CIRRUS

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WM8741

Production Data

PD, Rev 4.3, February 2013

ADDRESS

BITS

NAME

DEFAULT

DESCRIPTION

Volume

Control

04h

VOL_RAMP

Ramps volume from existing attenuation setting to new setting when

UPDATE applied.

0: Step volume change

1: Ramp volume change

ATT2DB

Anti-clipping mode control. Attenuates PCM gain path by 2 dB:

0: 0dB gain

1: -2dB gain

ATC

Attenuator Control Mode:

0 = Right channels use Right attenuation

1 = Right Channels use Left Attenuation

SOFTMUTE

Soft mute select

0: Normal Operation

1: Soft mute both channels

IZD

Enables infinite zero detect (detects 1024 zeros on input):

0 = Disable infinite zero detect

1 = Enable infinite zero detect

6:5

ZEROFLR

[1:0]

Zero flag output:

00 = Pin assigned to logical AND of LEFT and RIGHT channels

01 = Pin assigned to LEFT channel

10 = Pin assigned to RIGHT channel

11 = ZFLAG disabled

AMUTE

Applies analogue mute in DSD mode

0 = Normal operation

1 = Analogue mute applied

Table 57 R4 Volume Control Register

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