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WM8986GECO/V Datasheet(PDF) 30 Page - Wolfson Microelectronics plc

Part # WM8986GECO/V
Description  Multimedia DAC With Class D Headphone and Line Out
PDF  87 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8986GECO/V Datasheet(HTML) 30 Page - Wolfson Microelectronics plc

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WM8986
Pre-Production
w
PP, Rev 3.1, February 2007
30
The input PGA paths can have a +20dB boost (PGABOOSTL/R=1), a 0dB pass through
(PGABOOSTL/R=0) or be completely isolated from the input boost circuit (INPPGAMUTEL/R=1).
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R47 (2Fh)
Left Input
BOOST
control
8
PGABOOSTL
1
Boost enable for left channel input
PGA:
0 = PGA output has +0dB gain
through input BOOST stage.
1 = PGA output has +20dB gain
through input BOOST stage.
R48 (30h)
Right Input
BOOST
control
8
PGABOOSTR
1
Boost enable for right channel input
PGA:
0 = PGA output has +0dB gain
through input BOOST stage.
1 = PGA output has +20dB gain
through input BOOST stage.
Table 7 Input BOOST Stage Control
The Auxiliary amplifier path to the BOOST stages is controlled by the AUXL2BOOSTVOL[2:0] and
AUXR2BOOSTVOL[2:0] register bits. When AUXL2BOOSTVOL/AUXR2BOOSTVOL=000 this path
is completely disconnected from the BOOST stage. Settings 001 through to 111 control the gain in
3dB steps from -12dB to +6dB.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R47 (2Fh)
Left channel
Input BOOST
control
2:0
AUXL2BOOSTVOL
000
Controls the auxiliary amplifier to
the left channel input boost stage:
000 = Path disabled
(disconnected)
001 = -12dB gain
010 = -9dB gain
011 = -6dB gain
100 = -3dB gain
101 = +0dB gain
110 = +3dB gain
111 = +6dB gain
R48 (30h)
Right channel
Input BOOST
control
2:0
AUXR2BOOSTVOL
000
Controls the auxiliary amplifier to
the right channel input boost
stage:
000 = Path disabled
(disconnected)
001 = -12dB gain
010 = -9dB gain
011 = -6dB gain
100 = -3dB gain
101 = +0dB gain
110 = +3dB gain
111 = +6dB gain
Table 8 Input BOOST Stage Control



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