Pre-Production
WM8959
The output mixers LOPMIX and LONMIX and their outputs LOP and LON are controlled as described
in Table 31. Care should be taken to avoid clipping when enabling more than one path to LOP or
LON. The LOATTN attenuation control can be used to prevent clipping when more than one full scale
signal is input to the LOP mixer.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R30 (1Eh)
6
LONMUTE
1b
LON Line Output Mute
0 = Un-mute
1 = Mute
5
4
6
5
4
2
1
0
LOPMUTE
LOATTN
1b
0b
0b
0b
0b
0b
0b
0b
LOP Line Output Mute
0 = Un-mute
1 = Mute
LOP Attenuation
0 = 0dB
1 = -6dB
R52 (34h)
LLOPGALON
LROPGALON
LOPLON
LOPGA to LONMIX
0 = Mute
1 = Un-mute
ROPGA to LONMIX
0 = Mute
1 = Un-mute
Inverted LOP Output to LONMIX
0 = Mute
1 = Un-mute
LR12LOP
RIN12 PGA Output to LOPMIX
0 = Mute
1 = Un-mute
LL12LOP
LIN12 PGA Output to LOPMIX
0 = Mute
1 = Un-mute
LLOPGALOP
LOPGA to LOPMIX
0 = Mute
1 = Un-mute
Table 31 LOP and LON Volume Control
PP, May 2008, Rev 3.1
65
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
