I/O Path Report Command Lines Example - 2022.1 English

UltraFast Design Methodology Guide for Xilinx FPGAs and SoCs (UG949)

Document ID
Release Date
2022.1 English
report_timing -from [all_inputs] -nworst 1000 -sort_by group \
-delay_type min_max
report_timing -to [all_outputs] -nworst 1000 -sort_by group \
-delay_type min_max

Improper I/O delay constraints can lead to impossible timing closure. The implementation tools are timing driven and work on optimizing the placement and routing to meet timing. If the I/O path requirements cannot be met and I/O paths have the worst violations in the design, the overall design QoR will be impacted.