WM8766 Wolfson Microelectronics plc, WM8766 Datasheet - Page 15

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

Production Data
DIGITAL AUDIO INTERFACE
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MASTER AND SLAVE MODES
The audio interface operates in either Slave or Master mode, selectable using the MS control bit. In
both Master and Slave modes DIN1/2/3 are always inputs to the WM8766 and DOUT is always an
output. The default is Slave mode.
In Slave mode, LRCLK and BCLK are inputs to the WM8766 DIN1/2/3 and LRCLK are sampled by
the WM8766 on the rising edge of BCLK.
By setting the control bit BCP the polarity of BCLK may be reversed so that DIN1/2/3 and LRCLK are
sampled on the falling edge of BCLK and DOUT changes on the rising edge of BCLK
Figure 11 Slave Mode
In Master mode, LRCLK and BCLK are outputs from the WM8766 (Figure 12). LRCLK and BCLK are
generated by the WM8766. DIN1/2/3 are sampled by the WM8766 on the rising edge of BCLK.
By setting control bit BCP the polarity of BCLK may be reversed so that DIN1/2/3 are sampled on the
falling edge of BCLK, and DOUT changes on the rising edge of BCLK.
Figure 12 Master Mode
WM8766
WM8766
DAC
DAC
DIN1/2/3
DIN1/2/3
LRCLK
LRCLK
BCLK
BCLK
3
3
DECODER
DECODER
DSP/
DSP/
PD Rev 4.1 July 2005
WM8766
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