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WM8766 Arkusz danych(PDF) 20 Page - Wolfson Microelectronics plc

Numer części WM8766
Szczegółowy opis  24-bit, 192kHz 6-Channel DAC
PDF  36 Pages
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Producent  WOLFSON [Wolfson Microelectronics plc]
Strona internetowa  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8766 Arkusz danych(HTML) 20 Page - Wolfson Microelectronics plc

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WM8766
Production Data
w
PD Rev 4.1 July 2005
20
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
0000010
DAC Control
8:5
PL[3:0]
1001
1111
(L+R)/2
(L+R)/2
DAC DIGITAL AUDIO INTERFACE CONTROL REGISTER
Interface format is selected via the FMT[1:0] register bits:
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0000011
Interface Control
1:0
FMT
[1:0]
00
Interface Format Select:
00 : Right justified mode
01: Left justified mode
10: I
2S mode
11: DSP modes A or B
In left justified, right justified or I
2S modes, the LRP register bit controls the polarity of LRCLK. If this
bit is set high, the expected polarity of LRCLK will be the opposite of that shown in Figure 13, Figure
14 and Figure 15. Note that if this feature is used as a means of swapping the left and right
channels, a 1 sample phase difference will be introduced. In DSP modes, the LRP register bit is
used to select between modes A and B.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
In left/right/I
2S Modes:
LRCLK Polarity (normal)
0 : Normal LRCLK polarity
1: Inverted LRCLK polarity
0000011
Interface Control
2
LRP
0
In DSP Mode:
0 : DSP mode A
1: DSP mode B
By default, LRCLK and DIN1/2/3 are sampled on the rising edge of BCLK and should ideally change
on the falling edge. Data sources that change LRCLK and DIN1/2/3 on the rising edge of BCLK can



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