SLR-Crossing Optimization - 2024.1 English

Vivado Design Suite User Guide: Implementation (UG904)

Document ID
UG904
Release Date
2024-06-05
Version
2024.1 English

Performs post-place or post-route optimizations to improve the path delay of inter-SLR connections. The optimization adjusts the locations of the driver, load, or both along the SLR crossing. Replication is supported in post-route optimization if the driver has inter- and intra-SLR loads. A TNS cleanup option is supported with the -tns_cleanup switch with the -slr_crossing_opt switch. TNS cleanup allows some slack degradation on other paths when performing inter-SLR path optimization as long as the overall WNS of the design does not degrade. For UltraScale devices, either a TX_REG or an RX_REG SLL register can be targeted. In UltraScale+ devices both, TX_REG and RX_REG registers on the same inter-SLR connection can be targeted.