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WM8771 Datasheet(PDF) 28 Page - Wolfson Microelectronics plc

Part # WM8771
Description  24-bit, 192kHz 8-Channel Codec
PDF  44 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8771 Datasheet(HTML) 28 Page - Wolfson Microelectronics plc

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WM8771
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PP Rev 2.0 December 2001
28
DAC OUTPUT CONTROL
The DAC output control word determines how the left and right inputs to the audio Interface are
applied to the left and right DACs:
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
PL[3:0]
Left
Output
Right
Output
0000
Mute
Mute
0001
Left
Mute
0010
Right
Mute
0011
(L+R)/2
Mute
0100
Mute
Left
0101
Left
Left
0110
Right
Left
0111
(L+R)/2
Left
1000
Mute
Right
1001
Left
Right
1010
Right
Right
1011
(L+R)/2
Right
1100
Mute
(L+R)/2
1101
Left
(L+R)/2
1110
Right
(L+R)/2
10011
DAC Control
7:4
PL[3:0]
1001
1111
(L+R)/2
(L+R)/2
DAC DIGITAL VOLUME CONTROL
The DAC volume may be adjusted in the digital domain using independent digital attenuation control
registers
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
7:0
LDA1[7:0]
11111111
(0dB)
Digital Attenuation data for Left channel DACL1 in 0.5dB steps. See
Table 10
01001
Digital
Attenuation
DACL1
8
UPDATE
Not latched
Controls simultaneous update of all Attenuation Latches
0: Store LDA1 in intermediate latch (no change to output)
1: Store LDA1 and update attenuation on all channels
7:0
RDA1[6:0]
11111111
(0dB)
Digital Attenuation data for Right channel DACR1 in 0.5dB steps.
See Table 10
01010
Digital
Attenuation
DACR1
8
UPDATE
Not latched
Controls simultaneous update of all Attenuation Latches
0: Store RDA1 in intermediate latch (no change to output)
1: Store RDA1 and update attenuation on all channels.
7:0
LDA2[7:0]
11111111
(0dB)
Digital Attenuation data for Left channel DACL2 in 0.5dB steps. See
Table 10
01011
Digital
Attenuation
DACL2
8
UPDATE
Not latched
Controls simultaneous update of all Attenuation Latches
0: Store LDA2 in intermediate latch (no change to output)
1: Store LDA2 and update attenuation on all channels.



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