WM8959
Pre-Production
The output mixers OUT3MIX and OUT4MIX and their outputs OUT3 and OUT4 are controlled as
described in Table 30. Care should be taken to avoid clipping when enabling more than one path to
OUT3 or OUT4. The OUT3ATTN and OUT4ATTN attenuation controls can be used to prevent
clipping when more than one full scale signal is input to the mixers.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R31 (1Fh)
5
OUT3MUTE
1b
OUT3 Mute
0 = Un-mute
1 = Mute
4
1
0
5
4
1
0
OUT3ATTN
OUT4MUTE
OUT4ATTN
LI4O3
0b
1b
0b
0b
0b
0b
0b
OUT3 Attenuation
0 = 0dB
1 = -6dB
OUT4 Mute
0 = Un-mute
1 = Mute
OUT4 Attenuation
0 = 0dB
1 = -6dB
R51 (33h)
LIN4/RXN Pin to OUT3MIX
0 = Mute
1 = Un-mute
LOPGA to OUT3MIX
0 = Mute
LPGAO3
RI4O4
1 = Un-mute
RIN4/RXP Pin to OUT4MIX
0 = Mute
1 = Un-mute
ROPGA to OUT4MIX
0 = Mute
RPGAO4
1 = Un-mute
Table 30 OUT3 and OUT4 Volume Control
PP, May 2008, Rev 3.1
64
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
