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WM8993 Datasheet(PDF) 74 Page - Wolfson Microelectronics plc

Part # WM8993
Description  Audio Hub CODEC for Multimedia Phones
PDF  229 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8993 Datasheet(HTML) 74 Page - Wolfson Microelectronics plc

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WM8993
Production Data
w
PD, November 2010, Rev 4.0
74
SPEAKER MIXER CONTROL
The Speaker Mixer path select and volume controls are described in Table 45 for the Left Channel
(SPKMIXL) and Table 46 for the Right Channel (SPKMIXR).
Care should be taken when enabling more than one path to a speaker mixer in order to avoid
clipping. The gain of each input path is adjustable using a selectable -3dB control in each path to
facilitate this. Each Speaker Mixer output is also controlled by an additional independent volume
control. The DAC input levels may also be controlled by the DAC digital volume control - see “Digital
to Analogue Converter (DAC)” for further details.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R54 (36h)
Speaker Mixer
7
MIXINL_TO_SPKMIXL
0b
MIXINL (Left ADC bypass) to
SPKMIXL Mute
0 = Mute
1 = Un-mute
5
IN1LP_TO_SPKMIXL
0b
IN1LP to SPKMIXL Mute
0 = Mute
1 = Un-mute
3
MIXOUTL_TO_SPKMIX
L
0b
Left Mixer Output to SPKMIXL
Mute
0 = Mute
1 = Un-mute
1
DACL_TO_SPKMIXL
0b
Left DAC to SPKMIXL Mute
0 = Mute
1 = Un-mute
R34 (22h)
SPKMIXL
Attenuation
5
MIXINL_SPKMIXL_VOL
0b
MIXINL (Left ADC bypass) to
SPKMIXL Fine Volume Control
0 = 0dB
1 = -3dB
4
IN1LP_SPKMIXL_VOL
0b
IN1LP to SPKMIXL Fine Volume
Control
0 = 0dB
1 = -3dB
3
MIXOUTL_SPKMIXL_V
OL
0b
Left Mixer Output to SPKMIXL Fine
Volume Control
0 = 0dB
1 = -3dB
2
DACL_SPKMIXL_VOL
0b
Left DAC to SPKMIXL Fine
Volume Control
0 = 0dB
1 = -3dB
1:0
SPKMIXL_VOL [1:0]
11b
Left Speaker Mixer Volume Control
00 = 0dB
01 = -6dB
10 = -12dB
11 = mute
Table 45 Left Speaker Mixer (SPKMIXL) Control



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