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ADV7623 CEC communicate Fail

Question asked by henry-tang on Sep 6, 2017
Latest reply on Sep 7, 2017 by JeyasudhaMuthuPerumal


Hi ADI Expert,


We found an issue that if we switch audio source rapidly between two source feed into ADV7623.

It may cause HPD pin be pulled low and sent 0x05 head code every 5 second.

And then system will send mute request to MCU, MCU will mute amp which cause no sound output. 


But if we switch audio source slower, this issue will not appear.


So switching source too fast may result from CEC communicate failure?

Or any register you may suggest us to check for verifying this issue.


Thanks very much!