The processor-addressable memories are shown in This Figure and include the following: •External DDR DRAM memory. •Internal OCM memory (LPD), see On-chip Memory. •RPU tightly-coupled memory (TCM), see Real-time Processing Unit. •PL block UltraRAM memories, see UltraScale Architecture Memory Resources User Guide (UG573) [Ref 10]. Figure 17-1: System Memories X-Ref Target - Figure 17-1