When SSI devices are used, the PCI Express hard block and the GTH quads connected to the PCIe hard block must be on the same Super Logic Region (SLR).
The following figure shows the XCVU125 device in an A2377 package. The integrated block for PCIe located at location Y2 cannot select the GTH at bank 228, because an SLR boundary would be crossed.
Figure 1. XCVU125 Device in an A2377 Package
