WM8962B datasheet(115/295 Pages) WOLFSON

115 / 295 page

WM8962

Rev 4.3

115

OUTPUT SIGNAL PATHS ENABLE

The four output mixers, and each analogue output pin and associated PGA, can be independently

enabled or disabled using the register bits described in Table 69.

The Class D speaker drivers are controlled using SPKOUTL_ENA and SPKOUTR_ENA. The

headphone drivers are controlled by HP1L_ENA and HP1R_ENA.

To enable the output PGAs, the reference voltage VMID and the bias current must also be enabled.

See “Reference Voltages and Bias Control” for details of the associated controls VMID_SEL and

BIAS_ENA.

Note that the Speaker and Headphone outputs, the Speaker and Headphone PGAs, and the Speaker

and headphone mixers are all disabled by default. The required signal paths must be enabled and un-

muted using the control bits described in the respective tables below.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R26 (1Ah)

Pwr Mgmt (2)

HPOUTL_PGA_E

Headphone Left PGA enable

0 = Disabled

1 = Enabled

HPOUTR_PGA_E

Headphone Right PGA enable

0 = Disabled

1 = Enabled

SPKOUTL_PGA_

ENA

Speaker Left PGA enable

0 = Disabled

1 = Enabled

SPKOUTR_PGA_

ENA

Speaker Right PGA enable

0 = Disabled

1 = Enabled

R49 (31h)

Class D

Control (1)

SPKOUTR_ENA

Right channel class D Speaker

Enable

0 = Disabled

1 = Enabled

SPKOUTL_ENA

Left channel class D Speaker

Enable

0 = Disabled

1 = Enabled

R69 (45h)

Analogue HP

HP1L_ENA

Enables HP1L input stage

0 = Disabled

1 = Enabled

For normal operation, this bit should

be set as the final stage of the

HP1L Enable sequence.

HP1R_ENA

Enables HP1R input stage

0 = Disabled

1 = Enabled

For normal operation, this bit should

be set as the final stage of the

HP1R Enable sequence.

R99 (63h)

Mixer Enables

HPMIXL_ENA

Left Headphone Mixer Enable

0 = Disabled

1 = Enabled

HPMIXR_ENA

Right Headphone Mixer Enable

0 = Disabled

1 = Enabled

SPKMIXL_ENA

Left Speaker Mixer Enable

0 = Disabled

1 = Enabled

SPKMIXR_ENA

Right Speaker Mixer Enable

0 = Disabled

1 = Enabled

Table 69 Output Signal Paths Enable

WM8962B Datasheet(PDF) 115 Page - Wolfson Microelectronics plc

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