WM8993 datasheet(67/229 Pages) WOLFSON

67 / 229 page

Production Data

WM8993

PD, November 2010, Rev 4.0

OUTPUT SIGNAL PATHS ENABLE

The output mixers and drivers can be independently enabled and disabled as described in Table 38.

Note that the headphone outputs HPOUT1L and HPOUT1R have dedicated output PGAs and

volume controls. As a result, a low power consumption DAC playback path can be supported without

needing to enable the output mixers MIXOUTL / MIXOUTR or the mixer output PGAs MIXOUTLVOL /

MIXOUTRVOL.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1 (01h)

Power

Management

(1)

SPKOUTR_ENA

SPKMIXR Mixer, SPKRVOL PGA

and SPKOUTR Output Enable

0 = Disabled

1 = Enabled

SPKOUTL_ENA

SPKMIXL Mixer, SPKLVOL PGA

and SPKOUTL Output Enable

0 = Disabled

1 = Enabled

HPOUT2_ENA

HPOUT2 Output Stage Enable

0 = Disabled

1 = Enabled

HPOUT1L_ENA

Enables HPOUT1L input stage

0 = Disabled

1 = Enabled

Note: When HPOUT1_AUTO_PU is

set, the HPOUT1L_ENA bit

automatically enables all stages of

the left headphone driver

HPOUT1R_ENA

Enables HPOUT1R input stage

0 = Disabled

1 = Enabled

Note: When HPOUT1_AUTO_PU is

set, the HPOUT1R_ENA bit

automatically enables all stages of

the right headphone driver

R3 (03h)

Power

Management

(3)

LINEOUT1N_ENA

LINEOUT1N Line Out and

LINEOUT1NMIX Enable

0 = Disabled

1 = Enabled

LINEOUT1P_ENA

LINEOUT1P Line Out and

LINEOUT1PMIX Enable

0 = Disabled

1 = Enabled

LINEOUT2N_ENA

LINEOUT2N Line Out and

LINEOUT2NMIX Enable

0 = Disabled

1 = Enabled

LINEOUT2P_ENA

LINEOUT2P Line Out and

LINEOUT2PMIX Enable

0 = Disabled

1 = Enabled

SPKRVOL_ENA

SPKMIXR Mixer and SPKRVOL

PGA Enable

0 = Disabled

1 = Enabled

Note that SPKMIXR and SPKRVOL

are also enabled when

SPKOUTR_ENA is set.

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