wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 59

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Pre-Production
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OUTPUT MIXER CONTROL
Each of the four output mixers has the same four inputs:
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•
•
•
The input signals to the left and right mixers (feeding HPOUTL/R and LINEOUTL/R) are enabled
using the register fields described in Table 38. These mixers do not provide volume controls on the
inputs or outputs. However, input signals can be attenuated at source using the control fields
LIN_VOL, RIN_VOL, DACL_VOL and DACR_VOL.
Table 38 Headphone and Line Output Mixer Control
R50 (32h)
Analogue Left
Mix 0
R51 (33h)
Analogue
Right Mix 0
REGISTER
ADDRESS
DAC Left
DAC Right
Bypass Left
Bypass Right
BIT
3
2
1
0
3
2
1
0
DACL_TO_MIXO
UTL
DACR_TO_MIXO
UTL
BYPASSL_TO_MI
XOUTL
BYPASSR_TO_M
IXOUTL
DACL_TO_MIXO
UTR
DACR_TO_MIXO
UTR
BYPASSL_TO_MI
XOUTR
BYPASSR_TO_M
IXOUTR
LABEL
DEFAULT
1
0
0
0
0
1
0
0
Left DAC to Left Output Mixer
Enable
0 = disabled
1 = enabled
Right DAC to Left Output Mixer
Enable
0 = disabled
1 = enabled
Left Analogue Input to Left Output
Mixer Enable
0 = disabled
1 = enabled
Right Analogue Input to Left Output
Mixer Enable
0 = disabled
1 = enabled
Left DAC to Right Output Mixer
Enable
0 = disabled
1 = enabled
Right DAC to Right Output Mixer
Enable
0 = disabled
1 = enabled
Left Analogue Input to Right Output
Mixer Enable
0 = disabled
1 = enabled
Right Analogue Input to Right
Output Mixer Enable
0 = disabled
1 = enabled
PP, Rev 3.1, August 2009
DESCRIPTION
WM8903
59