WM8766 Wolfson Microelectronics plc, WM8766 Datasheet - Page 20

• Manufacturer Part Number: WM8766
• Description: 24-bit, 192khz 6-channel Dac
• Manufacturer: Wolfson Microelectronics plc

WM8766
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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:
DAC DIGITAL AUDIO INTERFACE CONTROL REGISTER
Interface format is selected via the FMT[1:0] register bits:
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
In left justified, right justified or I
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
REGISTER ADDRESS
REGISTER ADDRESS
Interface Control
Interface Control
DAC Control
0000010
0000011
0000011
BIT
BIT
1:0
BIT
8:5
2
2
S modes, the LRP register bit controls the polarity of LRCLK. If this
LABEL
LABEL
LABEL
PL[3:0]
FMT
[1:0]
LRP
DEFAULT
DEFAULT
DEFAULT
1001
0
00
In left/right/I
LRCLK Polarity (normal)
In DSP Mode:
PL[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Interface Format Select:
00 : Right justified mode
01: Left justified mode
10: I
11: DSP modes A or B
0 : Normal LRCLK polarity
1: Inverted LRCLK polarity
0 : DSP mode A
1: DSP mode B
2
S mode
DESCRIPTION
DESCRIPTION
DESCRIPTION
2
S Modes:
Left
Output
Mute
Left
Right
(L+R)/2
Mute
Left
Right
(L+R)/2
Mute
Left
Right
(L+R)/2
Mute
Left
Right
(L+R)/2
PD Rev 4.1 July 2005
Production Data
Right
Output
Mute
Mute
Mute
Mute
Left
Left
Left
Left
Right
Right
Right
Right
(L+R)/2
(L+R)/2
(L+R)/2
(L+R)/2
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