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DIR9001: DIR9001 application issue.

Part Number: DIR9001

Hi Support
The customer wants to use Pin 1 function "Channel-status data information of non-audio sample word, active-low" to detect the input Spdif audio signal. If no input the system will into the sleeping mode.
But I am no idea how to use......

They use 74LVU01+DIR9001TLV320AIC3254+MCU 

The enclosed is schematic, do you have any suggestion2818.dir9001.pdf?