WM8711 Wolfson Microelectronics Ltd., WM8711 Datasheet - Page 20

• Manufacturer Part Number: WM8711
• Description: Internet Audio DAC With Integrated Headphone Driver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8711
WOLFSON MICROELECTRONICS LTD
Table 8 Digital Audio Interface Control
Note: If right justified 32 bit mode is selected then the WM8711 defaults to 24 bits.
MASTER AND SLAVE MODE OPERATION
The WM8711 can be configured as either a master or slave mode device. As a master mode device
the WM8711 controls sequencing of the data and clocks on the digital audio interface. As a slave
device the WM8711 responds with data to the clocks it receives over the digital audio interface. The
mode is set with the MS bit of the control register as shown in Table 9.
Table 9 Programming Master/Slave Modes
0000111
Digital Audio
Interface Format
0000111
Digital Audio Interface
Format
REGISTER
ADDRESS
REGISTER
ADDRESS
1:0
3:2
4
5
6
7
BIT
6
FORMAT[1:0]
IWL[1:0]
LRP
LRSWAP
MS
BCLKINV
BIT
LABEL
MS
LABEL
10
10
0
0
0
0
DEFAULT
0
DEFAULT
Audio Data Format Select
11 = DSP Mode, frame sync + 2 data
packed words
10 = I
justified
01 = MSB-First, left justified
00 = MSB-First, right justified
Input Audio Data Bit Length Select
11 = 32 bits
10 = 24 bits
01 = 20 bits
00 = 16 bits
DACLRC phase control (in left, right
or I
1 = Right Channel DAC data when
DACLRC high
0 = Right Channel DAC data when
DACLRC low
(opposite phasing in I
or
DSP mode A/B select ( in DSP mode
only)
1 = MSB is available on 2
rising edge after DACLRC rising
edge
0 = MSB is available on 1st BCLK
rising edge after DACLRC rising
edge
DAC Left Right Clock Swap
1 = Right Channel DAC Data Left
0 = Right Channel DAC Data Right
Master Slave Mode Control
1 = Enable Master Mode
0 = Enable Slave Mode
Bit Clock Invert
1 = Invert BCLK
0 = Don’t invert BCLK
Master Slave Mode Control
1 = Enable Master Mode
0 = Enable Slave Mode
2
S modes)
2
S Format, MSB-First left-1
DESCRIPTION
DESCRIPTION
PP Rev 1.2 November 2000
2
S mode)
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nd
BCLK
20