The PCM2902C employs both S/PDIF input and output. Isochronous-out data from the host are encoded to the S/PDIF
output and the DAC analog output. Input data are selected as either S/PDIF or ADC analog input.
When the device detects an S/PDIF input and successfully locks the received data, the isochronous-in transfer
data source is automatically selected from S/PDIF itself; otherwise, the data source is selected to ADC analog
input.
This feature is a customer option. It is the responsibility of the user to implement this feature