Cirrus Logic WM8940 Manual page 73

REGISTER BIT LABEL
ADDRESS
6 DACMU
5:3
2 AMUTE
1
0 DACPOL
11 (0Bh) 15:8
7:0 DACVOL
12 (0Ch) 15:0
13 (0Dh) 15:0
14 (0Eh) 15:9
8 HPFEN
7 HPFAPP
6:4 HPFCUT
3:1
0 ADCPOL
15 (0Fh) 15:8
7:0 ADCVOL
16 (10h) 15 NF0_UP
14 NF0_EN
13:0 NF0_A0
17 (11h) 15 NF0_UP
14
Rev 4.4
DEFAULT
0 DAC soft mute enable
0 = DACMU disabled
1 = DACMU enabled
00 Reserved
0 DAC auto mute enable
0 = auto mute disabled
1 = auto mute enabled
0 Reserved
0 DAC Polarity Invert
0 = No inversion
1 = DAC output inverted
00h Reserved
11111111 DAC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
Reserved
Reserved
00h Reserved
1
High Pass Filter Enable
0=disabled
1=enabled
0 Select audio mode or application mode
st
0=Audio mode (1
1=Application mode (2
000 Application mode cut-off frequency
See Table 14 for details.
00 Reserved
0 ADC Polarity
0=normal
1=inverted
00h Reserved
11111111 ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -127dB
0000 0010 = -126.5dB
... 0.5dB steps up to
1111 1111 = 0dB
0 Notch filter 0 update. The notch filter 0 values used
internally only update when one of the NF0_UP bits is
set high.
0
Notch filter 0 enable:
0=Disabled
1=Enabled
0000h Notch Filter 0 a0 coefficient
0 Notch filter 0 update. The notch filter 0 values used
internally only update when one of the NF0_UP bits is
set high.
0 Reserved
DESCRIPTION
order, fc = ~3.7Hz)
nd
order, fc = HPFCUT)
WM8940
REFER TO
Output Signal
Path
Output Signal
Path
Output Signal
Path
Output Signal
Path
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
Analogue to
Digital Converter
(ADC)
73