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WM8960CGEFL/V Datasheet(PDF) 25 Page - Cirrus Logic

Part # WM8960CGEFL/V
Description  Speaker and Headphone Drivers for Portable Audio Applications
PDF  94 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8960CGEFL/V Datasheet(HTML) 25 Page - Cirrus Logic

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WM8960
Rev 4.4
25
INPUT BOOST
The input path to the ADCs is via a boost stage, which can mix signals from the microphone PGAs
and the line inputs.
The boost stage can provide up to +29dB additional gain from the microphone PGA output to the ADC
input, providing a total maximum available analogue gain of +59dB from microphone to ADC. The
microphone PGA path to the boost mixer is muted using LINMUTE and RINMUTE as shown in Table
4. Microphone PGA to boost gain settings are shown in Table 5.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R32 (20h)
ADCL Signal
path
5:4
LMICBOOST
[1:0]
00
Left Channel Input PGA Boost Gain
00 = +0dB
01 = +13dB
10 = +20dB
11 = +29dB
R33 (21h)
ADCR Signal
path
5:4
RMICBOOST
[1:0]
00
Right Channel Input PGA Boost
Gain
00 = +0dB
01 = +13dB
10 = +20dB
11 = +29dB
Table 5 Microphone PGA Boost Control
For line inputs, -12dB to +6dB gain is available on the boost mixer, with mute control, as shown in
Table 6.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R43 (2Bh)
Input Boost
Mixer 1
6:4
LIN3BOOST
[2:0]
000
LINPUT3 to Boost Mixer gain
000 = Mute
001 = -12dB
...3dB steps up to
111 = +6dB
3:1
LIN2BOOST
[2:0]
000
LINPUT2 to Boost Mixer gain
000 = Mute
001 = -12dB
...3dB steps up to
111 = +6dB
R44 (2Ch)
Input Boost
Mixer 2
6:4
RIN3BOOST
[2:0]
000
RINPUT3 to Boost Mixer gain
000 = Mute
001 = -12dB
...3dB steps up to
111 = +6dB
3:1
RIN2BOOST
[2:0]
000
RINPUT2 to Boost Mixer gain
000 = Mute
001 = -12dB
...3dB steps up to
111 = +6dB
Table 6 Line Input Boost Control
When all three input paths to the boost mixer are disabled, the boost mixer will automatically be
muted.



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