Pre-Production
WM8904
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Left Input PGA Common Mode Rejection enable
0 = Disabled
Input PGA
Common Mode
Amplifier
R46 (2Eh)
Analogue
Left Input 1
6
INL_CM_ENA
1
1 = Enabled
(only available for L_MODE=01 – Differential Line)
In Single-Ended or Differential Line Modes, this field
selects the input pin for the inverting side of the left
input path.
Analogue Input
Signal Path
5:4
3:2
1:0
L_IP_SEL_N
[1:0]
00
01
00
In Differential Mic Mode, this field selects the input pin
for the non-inverting side of the left input path.
00 = IN1L
01 = IN2L
1X = IN3L
In Single-Ended or Differential Line Modes, this field
selects the input pin for the non-inverting side of the left Signal Path
input path.
Analogue Input
L_IP_SEL_P
[1:0]
In Differential Mic Mode, this field selects the input pin
for the inverting side of the left input path.
00 = IN1L
01 = IN2L
1X = IN3L
Sets the mode for the left analogue input:
00 = Single-Ended
Analogue Input
Signal Path
L_MODE [1:0]
01 = Differential Line
10 = Differential MIC
11 = Reserved
Register 2Eh Analogue Left Input 1
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Right Input PGA Common Mode Rejection enable
0 = Disabled
Input PGA
Common Mode
Amplifier
R47 (2Fh)
Analogue
Right Input 1
6
INR_CM_ENA
1
1 = Enabled
(only available for R_MODE=01 – Differential Line)
In Single-Ended or Differential Line Modes, this field
selects the input pin for the inverting side of the right
input path.
Analogue Input
Signal Path
5:4
R_IP_SEL_N
[1:0]
00
In Differential Mic Mode, this field selects the input pin
for the non-inverting side of the right input path.
00 = IN1R
01 = IN2R
1X = IN3R
In Single-Ended or Differential Line Modes, this field
selects the input pin for the non-inverting side of the
right input path.
Analogue Input
Signal Path
3:2
R_IP_SEL_P
[1:0]
01
In Differential Mic Mode, this field selects the input pin
for the inverting side of the right input path.
00 = IN1R
01 = IN2R
1X = IN3R
Sets the mode for the right analogue input:
00 = Single-Ended
01 = Differential Line
10 = Differential MIC
11 = Reserved
Analogue Input
Signal Path
1:0
R_MODE [1:0]
00
Register 2Fh Analogue Right Input 1
PP, Rev 3.3, September 2012
157
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
