Pre-Production
WM8959
OUTPUT SIGNAL PATHS ENABLE
The output mixers and drivers can be independently enabled and disabled as described in Table 23.
Note that the headphone outputs LOUT and ROUT have dedicated volume controls. As a result, the
output PGAs LOPGA and ROPGA do not need to be enabled to provide volume control for the LOUT
and ROUT outputs.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R3 (03h)
13
LON_ENA
(rw)
0b
LON Line Out and LONMIX Enable
0 = disabled
1 = enabled
12
11
10
8
LOP_ENA
(rw)
0b
0b
0b
0b
LOP Line Out and LOPMIX Enable
0 = disabled
1 = enabled
RON_ENA
(rw)
RON Line Out and RONMIX Enable
0 = disabled
1 = enabled
ROP_ENA
(rw)
ROP Line Out and ROPMIX Enable
0 = disabled
1 = enabled
SPKPGA_ENA
(rw)
SPKMIX Mixer and Speaker PGA Enable
0 = disabled
1 = enabled
Note that SPKMIX and SPKPGA are also
enabled when SPK_ENA is set.
7
6
LOPGA_ENA
(rw)
0b
0b
0b
0b
0b
LOPGA Left Volume Control Enable
0 = disabled
1 = enabled
ROPGA_ENA
(rw)
ROPGA Right Volume Control Enable
0 = disabled
1 = enabled
5
LOMIX_ENA
(rw)
LOMIX Left Output Mixer Enable
0 = disabled
1 = enabled
4
ROMIX_ENA
(rw)
ROMIX Right Output Mixer Enable
0 = disabled
1 = enabled
R1 (01h)
12
SPK_ENA
(rw)
SPKMIX Mixer, Speaker PGA and Speaker
Output Enable
0 = disabled
1 = enabled
11
10
9
OUT3_ENA
(rw)
0b
0b
0b
0b
OUT3 and OUT3MIX Enable
0 = disabled
1 = enabled
OUT4_ENA
(rw)
OUT4 and OUT4MIX Enable
0 = disabled
1 = enabled
LOUT_ENA
(rw)
LOUT (Left Headphone Output) Enable
0 = disabled
1 = enabled
8
ROUT_ENA
(rw)
ROUT (Right Headphone Output) Enable
0 = disabled
1 = enabled
Table 23 Output Signal Paths Enable
PP, May 2008, Rev 3.1
57
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
