WM1811A datasheet(99/328 Pages) WOLFSON

99 / 328 page

Production Data

WM1811A

PD, November 2013, Rev 4.1

OUTPUT SIGNAL PATHS ENABLE

The output mixers and drivers can be independently enabled and disabled as described in Table 53.

The supply rails for headphone outputs HPOUT1L and HPOUT1R are generated using an integrated

dual-mode Charge Pump, which must be enabled whenever the headphone outputs are used. See the

“Charge Pump” section for details on enabling and configuring this circuit.

Note that the Headphone Outputs are also controlled by fields located within Register R96, which

provide suppression of pops & clicks when enabling and disabling the HPOUT1L and HPOUT1R

signal paths. These registers are described in the following “Headphone Signal Paths Enable” section.

For normal operation of the output signal paths, the reference voltage VMID and the bias current must

also be enabled. See “Reference Voltages and Master Bias” for details of the associated controls

VMID_SEL and BIAS_ENA.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1 (0001h)

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

For normal operation, this bit should

be set as the first step of the

HPOUT1L Enable sequence.

HPOUT1R_ENA

Enables HPOUT1R input stage

0 = Disabled

1 = Enabled

For normal operation, this bit should

be set as the first step of the

HPOUT1R Enable sequence.

R3 (0003h)

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

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