WM1811A datasheet(112/328 Pages) WOLFSON

112 / 328 page

WM1811A

Production Data

PD, November 2013, Rev 4.1

112

The speakeroutput PGA controls are shown in Table 63.The SPKOUT_VU bits control the loading of

the speaker PGA volume data. When SPKOUT_VU is set to 0, the volume control data will be loaded

into the respective control register, but will not actually change the gain setting. The speaker PGA

volume settings are both updated when a 1 is written toeither SPKOUT_VU bit. This makes it possible

to update the gain of both output paths simultaneously.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R38 (0026h)

Speaker

Volume Left

SPKOUT_VU

N/A

SpeakerOutput PGA Volume

Update

Writing a 1 to this bit will update

SPKLVOL and SPKRVOL volumes

simultaneously.

SPKOUTL_ZC

SPKLVOL (Left Speaker Output

PGA) Zero Cross Enable

0 = Zero cross disabled

1 = Zero cross enabled

SPKOUTL_MUTE_N

SPKLVOL (Left Speaker Output

PGA) Mute

0 = Mute

1 = Un-mute

5:0

SPKOUTL_VOL[5:0]

39h

(0dB)

SPKLVOL (Left Speaker Output

PGA) Volume

-57dB to +6dB in 1dB steps

00_0000 = -57dB

00_0001 = -56dB

… (1dB steps)

11_1111 = +6dB

(See Table 64 for output PGA

volume control range)

R39 (0027h)

Speaker

Volume Right

SPKOUT_VU

N/A

Speaker PGA Volume Update

Writing a 1 to this bit will update

SPKLVOL and SPKRVOL volumes

simultaneously.

SPKOUTR_ZC

SPKRVOL (Right Speaker Output

PGA) Zero Cross Enable

0 = Zero cross disabled

1 = Zero cross enabled

SPKOUTR_MUTE_

SPKRVOL (Right Speaker Output

PGA) Mute

0 = Mute

1 = Un-mute

5:0

SPKOUTR_VOL[5:0]

39h

(0dB)

SPKRVOL (Right Speaker Output

PGA) Volume

-57dB to +6dB in 1dB steps

00_0000 = -57dB

00_0001 = -56dB

… (1dB steps)

11_1111 = +6dB

(See Table 64 for output PGA

volume control range)

Table 63 Speaker Output PGA (SPKLVOL, SPKRVOL) Control

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