WM8912 datasheet(102/129 Pages) CIRRUS

102 / 129 page

WM8912

Production Data

PD, Rev 4.1, February 2013

102

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R31 (1Fh)

DAC Digital

Volume

Right

DAC_VU

DAC Volume Update

Writing a 1 to this bit causes left and right DAC volume

to be updated simultaneously

7:0

DACR_VOL

[7:0]

1100_0000 Right DAC Digital Volume

00h = Mute

01h = -71.625dB

02h = -71.250dB

… (0.375dB steps)

C0h to FFh = 0dB

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

R33 (21h)

DAC Digital

DAC_MONO

DAC Mono Mix

0 = Stereo

1 = Mono (Mono mix output on enabled DAC)

DAC_SB_FILT

Selects DAC filter characteristics

0 = Normal mode

1 = Sloping stopband mode

DAC_MUTERA

DAC Soft Mute Ramp Rate

0 = Fast ramp (fs/2, maximum ramp time is 10.7ms at

fs=48k)

1 = Slow ramp (fs/32, maximum ramp time is 171ms at

fs=48k)

DAC_UNMUTE

_RAMP

DAC Soft Mute Mode

0 = Disabling soft-mute (DAC_MUTE=0) will cause the

DAC volume to change immediately to DACL_VOL and

DACR_VOL settings

1 = Disabling soft-mute (DAC_MUTE=0) will cause the

DAC volume to ramp up gradually to the DACL_VOL

and DACR_VOL settings

DAC_OSR128

DAC Oversample Rate Select

0 = Low power (normal OSR)

1 = High performance (double OSR)

DAC_MUTE

DAC Soft Mute Control

0 = DAC Un-mute

1 = DAC Mute

2:1

DEEMPH [1:0]

DAC De-Emphasis Control

00 = No de-emphasis

01 = 32kHz sample rate

10 = 44.1kHz sample rate

11 = 48kHz sample rate

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