WM8731 / WM8731L
Production Data
The software control is given in Table 9.
REGISTER
ADDRESS
BIT
6:0
LABEL
DEFAULT
DESCRIPTION
0000010
LHPVOL[6:0]
1111001
( 0dB )
Left Channel Headphone Output
Volume Control
Left
Headphone
Out
1111111 = +6dB
. . 1dB steps down to
0110000 = -73dB
0000000 to 0101111 = MUTE
7
8
LZCEN
0
0
Left Channel Zero Cross detect
Enable
1 = Enable
0 = Disable
LRHPBOTH
Left to Right Channel Headphone
Volume, Mute and Zero Cross Data
Load Control
1 = Enable Simultaneous Load of
LHPVOL[6:0] and LZCEN to
RHPVOL[6:0] and RZCEN
0 = Disable Simultaneous Load
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
Table 9 Headphone Output Software Control
PD, Rev 4.9, October 2012
31
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
