DCI Cascade and Internal VREF are features that span multiple banks in an HPIO column. When migrating, if a bank (or banks) moves to another column or if it crosses an SLR/interposer boundary, it is no longer allowed as part of the original DCI cascade or internal VREF group. Each SLR contains its own DCI and VREF circuitry. See the DCI Cascading and Internal VREF sections in UltraScale Architecture SelectIO Resources User Guide (UG571) [Ref 10] to learn more about these features.