Hello
we use the C6657 in a stand alone controller application. We don' t use the fast serial links PCIe, HyperLink, SRIO.
In the Data Sheet the clocking input are specified with min and max values.
The question: Is it possible to use the C6657 without SRIOGMIICLK, HyerLinkCLK, PCIeCLK because of saving power on the board.
Hi Detlef,
yes. Any unused LJCB or LVDS differential clock inputs should be connected to the
appropriate rails to establish a valid logic level.
With an 1-k Ohm resistor you can reduce power consumption. The positive terminal should be connected to
the respective power rail. This is described in the Hardware Design Guide for KeyStone I Devices. 
Kind regards,
one and zero
