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CONFIDENTIAL – DO NOT COPY
Page 8-51
File No. SG-0184
2. DIGITAL AUDIO INTERFACE
a. Slave mode
The audio interfaces operations in either slave mode selectable using the MS control bit. In
slave mode DIN is always an input to the WM8776 and DOUT is always an output. The default
is Slave mode. In slave mode (ms=0) ADCLRC, DACLRC, ADCBCLK, DACBCLK are input to
the WM8776 .
DIN and DACLRC are sampled by the WM8776 on the rising edge of DACBCLK; ADCLRC is
sampled on the rising edge of ADCBCLK. ADC data is output on DOUT and changes on the
falling edge of ADCBCLK. By setting control bit BCLKINV the polarity of ADCBCLK and
DACBCLK may be reversed so that DIN and DACLRC are sample on the falling edge of
DACBCLK, ADCLRC is sampled on the falling edge of ADCBCLK and DOUT changes on the
rising of ADCBCLK Slave mode as shown in the following figure.