Straddle Option on CQ, CC, and RQ Interfaces - Straddle Option on CQ, CC, and RQ Interfaces - v1.3 English - PG213

UltraScale+ Devices Integrated Block for PCI Express v1.3 Product Guide (PG213)

Document_ID
PG213
Release_Date
2026-07-31
Version
v1.3 English

The CQ, CC, and RQ interfaces include a straddle option that allows up to two TLPs to transfer over the interface within the same beat. This improves the throughput for small TLPs, and when TLPs end in the first half a beat. Straddle can be enabled independently for each of these interfaces during core configuration in the AMD Vivado™ IDE. The straddle option is supported only in dword‑aligned mode.