Why independent clock is fed separately to SERDES?

[sharanbr]

I am looking at a legacy design. The design accepts 2 clocks (of same frequency and from same source), one goes to core logic and other goes to SERDES block.
I am not sure why an indepdent clock is fed separately to SERDES while the same
core clock can be used. When I refered to design document, it says that this is for the PLL to have an independent clock referece ..

Any idea ?

 

[master_picengineer]

independent

Hi,
Your question seems to me strange. Can you send me the design design document ?