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WM8956 Datasheet(PDF) 31 Page - Wolfson Microelectronics plc

Part # WM8956
Description  Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers
PDF  80 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8956 Datasheet(HTML) 31 Page - Wolfson Microelectronics plc

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Preliminary Technical Data
WM8956
w
PTD, July 2007, Rev 2.1
31
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
LD2LO
0
Left DAC to Left Output Mixer
0 = Disable (Mute)
1 = Enable Path
7
LI2LO
0
LINPUT3 to Left Output Mixer
0 = Disable (Mute)
1 = Enable Path
R34 (22h)
Left Output
Mixer Control
6:4
LI2LOVOL
[2:0]
101
(-15dB)
LINPUT3 to Left Output Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
7
LB2LO
0
Left Input Boost Mixer to Left Output
Mixer
0 = Disable (Mute)
1 = Enable Path
R45 (2Dh)
Bypass (1)
6:4
LB2LOVOL
[2:0]
101
(-15dB)
Left Input Boost Mixer to Left Output
Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
8
RD2RO
0
Right DAC to Right Output Mixer
0 = Disable (Mute)
1 = Enable Path
7
RI2RO
0
RINPUT3 to Right Output Mixer
0 = Disable (Mute)
1 = Enable Path
R37 (25h)
Right Output
Mixer Control
6:4
RI2ROVOL
[2:0]
101
(-15dB)
RINPUT3 to Right Output Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
7
RB2RO
0
Right Input Boost Mixer to Right Output
Mixer
0 = Disable (Mute)
1 = Enable Path
R46 (2Eh)
Bypass (2)
6:4
RB2ROVOL
[2:0]
101
(-15dB)
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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