WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 33

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WM8978

Manufacturer Part Number
WM8978
Description
The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet

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Preliminary Technical Data
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Table 10 Input BOOST Stage Control
Table 11 Input BOOST Enable Control
The BOOST stage is enabled under control of the BOOSTEN register bit.
R47
Left channel
Input BOOST
control
R48
Right channel
Input BOOST
control
R2
Power
management
2
REGISTER
REGISTER
ADDRESS
ADDRESS
2:0
6:4
2:0
6:4
4
5
BIT
BIT
AUXL2BOOSTVOL
L2_2BOOSTVOL
AUXR2BOOSTVOL
R2_2BOOSTVOL
BOOSTENL
BOOSTENR
LABEL
LABEL
0
0
DEFAULT
000
000
000
000
DEFAULT
Left channel Input BOOST enable
0 = Boost stage OFF
1 = Boost stage ON
Right channel Input BOOST enable
0 = Boost stage OFF
1 = Boost stage ON
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
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
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
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
Controls the L2 pin to the left
PTD Rev 2.6 November 2005
DESCRIPTION
DESCRIPTION
WM8978
33