WM9090ECSSLASHR datasheet(20/81 Pages) WOLFSON

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WM9090

Production Data

PD, November 2010, Rev 4.1

OUTPUT SIGNAL PATH

The WM9090 output mixers provide a high degree of flexibility, allowing configurable operation of

multiple signal paths through the device to a variety of analogue outputs. The outputs comprise a

ground referenced headphone driver and Class D loudspeaker driver. See “Analogue Outputs” for

further details of these outputs.

The WM9090 output signal paths and control registers are illustrated in Figure 3.

Figure 3 Control Registers for Output Signal Path

OUTPUT SIGNAL PATHS ENABLE

The output mixers and drivers can be independently enabled and disabled as described in Table 4.

See “Power Sequences and Pop Suppression Control” for details of additional control bits relating to

the Headphone Output configuration.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1 (01h)

Power

Management

(1)

SPKOUTL_ENA

Speaker Output Enable

0 = Disabled

1 = Enabled

HPOUT1L_ENA

Headphone Output (HPOUTL) input

stage enable

0 = Disabled

1 = Enabled

HPOUT1R_ENA

Headphone Output (HPOUTR)

input stage enable

0 = Disabled

1 = Enabled

R3 (03h)

Power

Management

SPKLVOL_ENA

Speaker PGA Enable

0 = Disabled

1 = Enabled

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