WM8956 Datasheet, PDF (30/80 Pages) Cirrus Logic – Hi-Fi DAC with 1W Stereo Class D Speaker Drivers

WM8956
Production Data
REGISTER
ADDRESS
R34 (22h)
Left Output
Mixer Control
R45 (2Dh)
Bypass (1)
R37 (25h)
Right Output
Mixer Control
R46 (2Eh)
Bypass (2)
BIT
LABEL
DEFAULT
DESCRIPTION
8
LD2LO
0
7
LI2LO
0
6:4 LI2LOVOL
[2:0]
101
(-15dB)
7
LB2LO
0
6:4 LB2LOVOL 101
[2:0]
(-15dB)
8
RD2RO
0
7
RI2RO
0
6:4 RI2ROVOL 101
[2:0]
(-15dB)
7
RB2RO
0
6:4 RB2ROVOL 101
[2:0]
(-15dB)
Left DAC to Left Output Mixer
0 = Disable (Mute)
1 = Enable Path
LINPUT3 to Left Output Mixer
0 = Disable (Mute)
1 = Enable Path
LINPUT3 to Left Output Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
Left Input Boost Mixer to Left Output
Mixer
0 = Disable (Mute)
1 = Enable Path
Left Input Boost Mixer to Left Output
Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
Right DAC to Right Output Mixer
0 = Disable (Mute)
1 = Enable Path
RINPUT3 to Right Output Mixer
0 = Disable (Mute)
1 = Enable Path
RINPUT3 to Right Output Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
Right Input Boost Mixer to Right Output
Mixer
0 = Disable (Mute)
1 = Enable Path
Right Input Boost Mixer to Right Output
Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
Table 16 Left and Right Output Mixer Mute and Volume Control
The mono output mixer can output, left, right, left+right or a buffered VMID. 0dB or 6dB attenuation is
selectable using MOUTVOL register bit. It is recommended to attenuate a mono mix of left and right
channels by 6dB in order to prevent clipping. This attenuation control (MOUTVOL) should not be
modified while OUT3 is enabled as this may cause an audible click noise.
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PD, November 2011, Rev 4.1
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