WM8731 / WM8731L
Production Data
DESCRIPTION
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
0000011
6:0
RHPVOL
[6:0]
1111001
( 0dB )
Right Channel Headphone Output
Volume Control
Right
Headphone Out
1111111 = +6dB
. . 1dB steps down to
0110000 = -73dB
0000000 to 0101111 = MUTE
7
8
RZCEN
0
0
Right Channel Zero Cross detect
Enable
1 = Enable
0 = Disable
RLHPBOTH
Right to Left Channel Headphone
Volume, Mute and Zero Cross Data
Load Control
1 = Enable Simultaneous Load of
RHPVOL[6:0] and RZCEN to
LHPVOL[6:0] and LZCEN
0 = Disable Simultaneous Load
Microphone Input Level Boost
1 = Enable Boost
0000100
0
MICBOOST
MUTEMIC
INSEL
0
Analogue Audio
Path Control
0 = Disable Boost
1
1
Mic Input Mute to ADC
1 = Enable Mute
0 = Disable Mute
2
0
Microphone/Line Input Select to ADC
1 = Microphone Input Select to ADC
0 = Line Input Select to ADC
Bypass Switch
3
BYPASS
1
1 = Enable Bypass
0 = Disable Bypass
DAC Select
4
DACSEL
0
1 =Select DAC
0 = Don’t select DAC
Side Tone Switch
5
SIDETONE
SIDEATT[1:0]
0
1 = Enable Side Tone
0 = Disable Side Tone
Side Tone Attenuation
11 = -15dB
7:6
00
10 = -12dB
01 = -9dB
00 = -6dB
PD, Rev 4.8, April 2009
51
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
