CROSSING CHIPLET BOUNDARIES WITH PCIE OVER UCIE

Summary from the TLDR Hardware newsletter

PCIe 8.0 traffic can cross chiplet boundaries through UCIe 3.0, but engineers must coordinate both protocols' power, reset, and recovery states. Timing mismatches can cause completion timeouts, dropped traffic, and deadlocks. Siemens' verification tools trace transactions across both layers and inject faults before silicon bring-up.