WM9090ECSSLASHR datasheet(21/81 Pages) WOLFSON

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Production Data

WM9090

PD, November 2010, Rev 4.1

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

(3)

MIXOUTL_ENA

MIXOUTL Headphone Mixer Enable

0 = Disabled

1 = Enabled

MIXOUTR_ENA

MIXOUTR Headphone Mixer

Enable

0 = Disabled

1 = Enabled

SPKMIX_ENA

SPKMIX Speaker Mixer Enable

0 = Disabled

1 = Enabled

Table 4 Output Signal Paths Enable

SPEAKER MIXER CONTROL

The signal path configuration registers for the Speaker Mixer are described in Table 5. Each of the

input PGAs IN1A, IN1B, IN2A and IN2B is independently selectable as an input to the Speaker

Mixer.

Care should be taken when enabling more than one path to a Speaker Mixer in order to avoid

clipping. The gain of each input path is adjustable using a selectable volume control in each path to

facilitate this.

The Speaker Mixer output can be muted or enabled using the SPKMIX_MUTE register bit. The

Speaker Mixer volume is also controlled by the Speaker Output PGA, as defined in Table 6.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R54 (36h)

Speaker Mixer

IN1A_TO_SPKMIX

IN1A to SPKMIX enable

0 = Disabled

1 = Enabled

IN1B_TO_SPKMIX

IN1B to SPKMIX enable

0 = Disabled

1 = Enabled

IN2A_TO_SPKMIX

IN2A to SPKMIX enable

0 = Disabled

1 = Enabled

IN2B_TO_SPKMIX

IN2B to SPKMIX enable

0 = Disabled

1 = Enabled

R34 (22h)

SPKMIXL

Attenuation

SPKMIX_MUTE

SPKMIX Output mute

0 = Un-Mute

1 = Mute

7:6

IN1A_SPKMIX_VOL

IN1A to SPKMIX volume control

00 = 0dB

01 = -6dB

10 = -9dB

11 = -12dB

5:4

IN1B_SPKMIX_VOL

IN1B to SPKMIX volume control

00 = 0dB

01 = -6dB

10 = -9dB

11 = -12dB

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