Production Data
WM8750L
LOUT2/ROUT2 OUTPUTS
The LOUT2 and ROUT2 output pins are essentially similar to LOUT1 and ROUT1, but they are
independently controlled and can also drive an 8 mono speaker (see Speaker Output section). For
speaker drive, the ROUT2 signal must be inverted (ROUT2INV = 1), so that the left and right channel
are mixed to mono in the speaker [L–(-R) = L+R].
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R40 (28h)
LOUT2
LO2VU
Same as LO1VU
8
7
0
0
LO2ZC
Left zero cross enable
Volume
1 = Change gain on zero cross only
0 = Change gain immediately
Similar to LOUT1VOL
LOUT2VOL
[6:0]
6:0
1111001
(0dB)
R41 (29h)
ROUT2
RO2VU
RO2ZC
Same as RO1VU
8
7
0
0
Right zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
Similar ROUT1VOL
Volume
ROUT2VOL
[6:0]
6:0
4
1111001
(0dB)
0
R24 (18h)
ROUT2INV
ROUT2 Invert
Additional
Control (2)
0 = No Inversion (0 phase shift)
1 = Signal inverted (180 phase shift)
Table 26 LOUT2/ROUT2 Volume Control
MONO OUTPUT
The MONOOUT pin can drive a mono line output. The signal volume on MONOOUT can be adjusted
under software control by writing to MOUTVOL.
REGISTER
ADDRESS
BIT
LABEL
MOZC
DEFAULT
DESCRIPTION
R42 (2Ah)
MONOOUT
Volume
MONOOUT zero cross enable
1 = Change gain on zero cross only
0 = Change gain immediately
MONOOUT Volume
7
0
MOUTVOL
[6:0]
6:0
1111001
(0dB)
1111111 = +6dB
… (80 steps)
0110000 = -67dB
0101111 to 0000000 = Analogue MUTE
Table 27 MONOOUT Volume Control
PD, Rev 4.4, August 2012
35
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
