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WM8956 Datasheet(PDF) 69 Page - Wolfson Microelectronics plc

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

WM8956 Datasheet(HTML) 69 Page - Wolfson Microelectronics plc

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Preliminary Technical Data
WM8956
w
PTD, July 2007, Rev 2.1
69
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
6:4
LI2LOVOL[2:0]
101
LINPUT3 to Left Output Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
Output Signal
Path
3:0
0000
Reserved
R35 (23h)
8:0
001010000
Reserved
R36 (24h)
8:0
001010000
Reserved
8
RD2RO
0
Right DAC to Right Output Mixer
0 = Disable (Mute)
1 = Enable Path
Output Signal
Path
7
RI2RO
0
RINPUT3 to Right Output Mixer
0 = Disable (Mute)
1 = Enable Path
Output Signal
Path
6:4
RI2ROVOL[2:0]
101
RINPUT3 to Right Output Mixer Volume
000 = 0dB
...(3dB steps)
111 = -21dB
Output Signal
Path
R37 (25h)
Right Out
Mix
3:0
0000
Reserved
8
0
Reserved
7
L2MO
0
Left Output Mixer to Mono Output Mixer Control
0 = Left channel mix disabled
1 = Left channel mix enabled
Output Signal
Path
R38 (26h)
Mono Out
Mix (1)
6:0
0000000
Reserved
8
0
Reserved
7
R2MO
0
Right Output Mixer to Mono Output Mixer
Control
0 = Right channel mix disabled
1 = Right channel mix enabled
Output Signal
Path
R39 (27h)
Mono Out
Mix (2)
6:0
0000000
Reserved
8
SPKVU
N/A
Speaker Volume Update
Writing a 1 to this bit will cause left and right
speaker volumes to be updated (SPKLVOL and
SPKRVOL)
Analogue
Outputs
7
SPKLZC
0
Left Speaker Zero Cross Enable
1 = Change gain on zero cross only
0 = Change gain immediately
Analogue
Outputs
R40 (28h)
Left
Speaker
Volume
6:0
SPKLVOL[6:0]
0000000
SPK_LP/SPK_LN Volume
1111111 = +6dB
… 1dB steps down to
0110000 = -73dB
0101111 to 0000000 = Analogue MUTE
Analogue
Outputs
8
SPKVU
N/A
Speaker Volume Update
Writing a 1 to this bit will cause left and right
speaker volumes to be updated (SPKLVOL and
SPKRVOL)
Analogue
Outputs
7
SPKRZC
0
Right Speaker Zero Cross Enable
1 = Change gain on zero cross only
0 = Change gain immediately
Analogue
Outputs
R41 (29h)
Right
Speaker
Volume
6:0
SPKRVOL[6:0]
0000000
SPK_RP/SPK_RN Volume
1111111 = +6dB
… 1dB steps down to
0110000 = -73dB
0101111 to 0000000 = Analogue MUTE
Analogue
Outputs
R42 (2Ah)
8:7
00
Reserved


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