WM8941
Pre Production
Figure 6 Microphone Input PGA Circuit (switch positions shown are for differential mic
input)
REGISTER BIT
ADDRESS
R44
Input Control
LABEL
DEFAULT
DESCRIPTION
2
1
0
AUX2INPPGA
0
1
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.
MICN2INPPGA
MICP2INPPGA
Connect MICN to input PGA negative
terminal.
0=MICN not connected to input PGA
1=MICN connected to input PGA amplifier
negative terminal.
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
PP, Rev 3.3, December 2007
20
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
