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WM8978GEFL/V Datasheet(PDF) 22 Page - Wolfson Microelectronics plc

Part # WM8978GEFL/V
Description  STEREO CODEC WITH SPEAKER DRIVER
PDF  78 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8978GEFL/V Datasheet(HTML) 22 Page - Wolfson Microelectronics plc

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WM8978
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PP Rev 1.7 January 2005
22
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
2:0
AUXL2BOOSTVOL
000
Controls the auxilliary amplifer to
the left channel input boost stage:
000=Path disabled (disconnected)
001=-12dB gain through boost
stage
010=-9dB gain through boost
stage
…
111=+6dB gain through boost
stage
R47
Left channel
Input BOOST
control
6:4
L2_2BOOSTVOL
000
Controls the L2 pin to the left
channel input boost stage:
000=Path disabled (disconnected)
001=-12dB gain through boost
stage
010=-9dB gain through boost
stage
…
111=+6dB gain through boost
stage
R48
Right channel
Input BOOST
control
2:0
AUXR2BOOSTVOL
000
Controls the auxilliary amplifer to
the right channel input boost
stage:
000=Path disabled (disconnected)
001=-12dB gain through boost
stage
010=-9dB gain through boost
stage
…
111=+6dB gain through boost
stage
6:4
R2_2BOOSTVOL
000
Controls the R2 pin to the right
channel input boost stage:
000=Path disabled (disconnected)
001=-12dB gain through boost
stage
010=-9dB gain through boost
stage
…
111=+6dB gain through boost
stage
Table 6 Input BOOST Stage Control
The BOOST stage is enabled under control of the BOOSTEN register bit.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
4
BOOSTENL
0
Left channel Input BOOST enable
0 = Boost stage OFF
1 = Boost stage ON
R2
Power
management
2
5
BOOSTENR
0
Right channel Input BOOST enable
0 = Boost stage OFF
1 = Boost stage ON
Table 7 Input BOOST Enable Control



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