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WM8940CGEFL/V Datasheet(PDF) 19 Page - Wolfson Microelectronics plc

No. de pieza WM8940CGEFL/V
Descripción Electrónicos  Mono CODEC with Speaker Driver
PDF  91 Pages
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Fabricante Electrónico  WOLFSON [Wolfson Microelectronics plc]
Página de inicio  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8940CGEFL/V Datasheet(HTML) 19 Page - Wolfson Microelectronics plc

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Production Data
WM8940
w
PD, Rev 4.3, November 2011
19
Figure 6 Microphone Input PGA Circuit (switch positions shown are for differential mic
input)
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R44
Input Control
2
AUX2INPPGA
0
Select AUX amplifier output as input PGA
signal source.
0=AUX not connected to input PGA
1=AUX connected to input PGA amplifier
negative terminal.
1
MICN2INPPGA 1
Connect MICN to input PGA negative
terminal.
0=MICN not connected to input PGA
1=MICN connected to input PGA amplifier
negative terminal.
0
MICP2INPPGA
0
Connect input PGA amplifier positive
terminal to MICP or VMID.
0 = input PGA amplifier positive terminal
connected to VMID
1 = input PGA amplifier positive terminal
connected to MICP through variable resistor
string
Table 2 Input Control
The input PGA is enabled by the IPPGAEN register bit.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R2
Power
Management 2
2
INPPGAEN
0
Input microphone PGA enable
0 = disabled
1 = enabled
Table 3 Input PGA Enable Control



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