In the UltraScale and UltraScale+ device XPE spreadsheets, the BRAM sheet has additional column named Cascade Group Size. For cascaded BRAMs, this column shows how many BRAMs are cascaded together in each group. This number and the total number of BRAMs in the modules are used to determine the number of active BRAMs at a given time.
For example, if the module has a total of 20 BRAMs and the Cascade Group Size is 4, the tool calculates 20/4=5 groups each with 4 BRAMs cascaded together. If none of the BRAMs are cascaded, leave this column empty or set to 0.