The Aurora 64B66B core reports Negative SETUP slack violations on some paths that have more routing delay than logic delay.
For IP configurations that include a higher number of lanes/flow control options, the routing of some logics is not optimal with the default settings from the tool.
To overcome this scenario, the implementation tool requires additional options to be enabled.
Once these options are enabled, the tools will be able to provide a more optimized routing that will meet the timing for the IP.
The following Tcl command needs to be executed before running the implementation of the IP:
For further guidance, please refer to Xilinx Timing Analysis Solution Center (Xilinx Answer 40832)
07/30/2015 - Initial Release
10/06/2015 - Updated with better strategy recommendation
02/24/2016 - Updated details for further guidance