wm9090 Wolfson Microelectronics plc, wm9090 Datasheet - Page 19

• Manufacturer Part Number: wm9090
• Description: Ultra Low Power Audio Subsystem
• Manufacturer: Wolfson Microelectronics plc

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Pre-Production
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 4.
Figure 4 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.
R1 (01h)
Power
Management
(1)
R3 (03h)
Power
Management
REGISTER
ADDRESS
BIT
12
9
8
8
SPKOUTL_ENA
HPOUT1L_ENA
HPOUT1R_ENA
SPKLVOL_ENA
LABEL
DEFAULT
0
0
0
0
Speaker Output Enable
0 = Disabled
1 = Enabled
Headphone Output (HPOUTL) input
stage enable
0 = Disabled
1 = Enabled
Headphone Output (HPOUTR)
input stage enable
0 = Disabled
1 = Enabled
Speaker PGA Enable
0 = Disabled
1 = Enabled
PP, January 2010, Rev 3.0
DESCRIPTION
WM9090
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