Part Number: DS90UB954-Q1
Hello Support member
I refer to the data sheet(SNLS570B) P30, "Table 2. Strap Configuration Mode Select".
It seems that when Rhigh = OPEN and Rlow = 10KΩ, the RX MODE will be set to CSI-2 nonsynchronous Back Channel.

Q1.
Is it able to change to CSI-2 Synchronous mode after startup?
If it is possible, please tell me the setting procedure.
Best Regards,