DS90UB960-Q1: Layout review DS90UB960-Q1 interface with SC206E

Hello Harri,

HARI T O1 said:

Below is the enlarged version of CSI0 interface. The yellow color signals are clock and red color are CSI0 t0 3 data line.
These signals are travelling from top to bottom. But there is no return vias are provided.What you see in blue color is the ground

If you do not add return current Vias you will have serious EMC problems.

Is blue ground connected through all layer using ground Vias?

HARI T O1 said:

My question is do we need to place return vias near symmetrical to the vias which are moving from top to bottom.

Yes, these are very important for EMC performance.

HARI T O1 said:

Is it a good idea to pour GND in between differential pairs.You can see that in between CSIO_D1 and CSI0_D2 gnd is poured.As per my knowledge this will affect the impedance of the trace.Please correct me if I am wrong

If you want to pour ground then you must increase the spacing between differential-pair traces and ground to >2xS. Where S is the spacing between N and P parts of a pair.

Thanks for the feedback.

As I said, If you do not add return current Vias you will have serious EMC problems.