Thank you very much for your reply. Your understanding is correct. Following your advice, I have reviewed the relevant documents about "Digital Audio Interface (DAI)" and "Signal Routing Units (SRUs)". However, I find it difficult to understand for me. Could you please help me check the following connections which are referenced in the schematic "EV-21562-AUTO"?

ADSP-21565   AD1939
DAI0_PIN03 DBCLK
DAI0_PIN04 DLRCLK
DAI0_PIN08 DSDATA1
DAI0_PIN07 DSDATA2
DAI0_PIN06 DSDATA3
DAI0_PIN05 DSDATA4
     
DAI0_PIN20 ABCLK
DAI0_PIN19 ALRCLK
DAI0_PIN09 ASDATA1
DAI0_PIN10 ASDATA2