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WM8971LEFL/R 数据表(PDF) 29 Page - Wolfson Microelectronics plc

部件名 WM8971LEFL/R
功能描述  STEREO CODEC FOR PORTABLE AUDIO APPLLICATIONS
PDF  56 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8971LEFL/R 数据表(HTML) 29 Page - Wolfson Microelectronics plc

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Advanced Information
WM8971L
w
AI Rev 3.0 March 2004
29
OUTPUT MIXERS
The WM8971L provides the option to mix the DAC output signal with analogue line-in signals from
the LINPUT1, RINPUT1, MIC pins or a mono differential input (LINPUT1 – RINPUT1). The level of
the mixed-in signals can be controlled with PGAs (Programmable Gain Amplifiers).
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R34 (22h)
Left Mixer (1)
2:0
LMIXSEL
000
Left Input Selection for Output Mix
000 = LINPUT1
011 = Left ADC Input (after PGA /
MICBOOST)
100 = Differential input
R36 (24h)
Right Mixer
(1)
2:0
RMIXSEL
000
Right Input Selection for Output Mix
000 = RINPUT1
001 = MIC
010 = Reserved (do not use)
011 = Right ADC Input (after PGA /
MICBOOST)
100 = Differential input
Table 16 Output Mixer Signal Selection
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
LD2LO
0
Left DAC to Left Mixer
0 = Disable (Mute)
1 = Enable Path
7
LI2LO
0
LMIXSEL Signal to Left Mixer
0 = Disable (Mute)
1 = Enable Path
R34 (22h)
Left Mixer
Control (1)
6:4
LI2LOVOL
[2:0]
101
(-9dB)
LMIXSEL Signal to Left Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
8
RD2LO
0
Right DAC to Left Mixer
0 = Disable (Mute)
1 = Enable Path
7
RI2LO
0
RMIXSEL Signal to Left Mixer
0 = Disable (Mute)
1 = Enable Path
R35 (23h)
Left Mixer
Control (2)
6:4
RI2LOVOL
[2:0]
101
(-9dB)
RMIXSEL Signal to Left Mixer Volume
000 = +6dB
… (3dB steps)
111 = -15dB
Table 17 Left Output Mixer Control



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