I downloaded your datasheet from your public website, and referring the power up sequence in page21.
For ADV7626, it seems, there is strict power up sequence between 3.3V supply & 1.8V supply.
I want to confirm what is the voltage level of “1.8V power supply” ADV7626 treated it as 0V, while "3.3V power supply" is ON. On GND line, of course, there are noise or something, so we assume there are some threshold level - it can be allowed.
Thank you for your help in advance.