WM8994 datasheet(113/359 Pages) WOLFSON

113 / 359 page

Production Data

WM8994

PD, April 2012, Rev 4.4

113

OUTPUT MIXER CONTROL

The Output Mixer path select and volume controls are described in Table 57 for the Left Channel

(MIXOUTL) and Table 58 for the Right Channel (MIXOUTR). The gain of each of input path may be

controlled independently in the range described in Table 59.

Note that the DAC input levels may also be controlled by the DAC digital volume controls (see “Digital

to Analogue Converter (DAC)”) and the Audio Interface digital volume controls (see “Digital Volume

and Filter Control”).

When using the IN2LP, IN2LN, IN2RP or IN2RN signal paths to the output mixers, the buffered VMID

reference must be enabled, using the VMID_BUF_ENA register, as described in “Reference Voltages

and Master Bias”.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R45 (002Dh)

Output Mixer

(1)

IN2RN_TO_MIXOUTL

IN2RN to MIXOUTL Mute

0 = Mute

1 = Un-mute

Note that VMID_BUF_ENA must be

set when using the IN2RN input to

MIXOUTL.

R49 (0031h)

Output Mixer

(5)

8:6

IN2RN_MIXOUTL_VOL

[2:0]

000

IN2RN to MIXOUTL Volume

0dB to -21dB in 3dB steps

000 = 0dB

001 = -3dB

…(3dB steps)

111 = -21dB

(See Table 59 for Volume Range)

R45 (002Dh)

Output Mixer

(1)

IN2LN_TO_MIXOUTL

IN2LN to MIXOUTL Mute

0 = Mute

1 = Un-mute

Note that VMID_BUF_ENA must be

set when using the IN2LN input to

MIXOUTL.

R47 (002Fh)

Output Mixer

(3)

8:6

IN2LN_MIXOUTL_VOL

[2:0]

000

IN2LN to MIXOUTL Volume

0dB to -21dB in 3dB steps

000 = 0dB

001 = -3dB

…(3dB steps)

111 = -21dB

(See Table 59 for Volume Range)

R45 (002Dh)

Output Mixer

(1)

IN1L_TO_MIXOUTL

IN1L PGA Output to MIXOUTL

Mute

0 = Mute

1 = Un-mute

R47 (002Fh)

Output Mixer

(3)

2:0

IN1L_MIXOUTL_VOL

[2:0]

000

IN1L PGA Output to MIXOUTL

Volume

0dB to -21dB in 3dB steps

000 = 0dB

001 = -3dB

…(3dB steps)

111 = -21dB

(See Table 59 for Volume Range)

R45 (002Dh)

Output Mixer

(1)

IN1R_TO_MIXOUTL

IN1R PGA Output to MIXOUTL

Mute

0 = Mute

1 = Un-mute

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