WM8993 datasheet(78/229 Pages) WOLFSON

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WM8993

Production Data

PD, November 2010, Rev 4.0

The speaker output PGA controls are shown in Table 49.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 to either SPKOUT_VU bit. This makes it

possible to update the gain of both output paths simultaneously.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R38 (26h)

Speaker

Volume Left

SPKOUT_VU

N/A

Speaker Output 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

(See Table 50 for output PGA

volume control range)

R39 (27h)

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_N

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

(See Table 50 for output PGA

volume control range)

Table 49 Speaker Output PGA (SPKLVOL, SPKRVOL) Control

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