Xilinx Design

Vivado Design Suite User Guide: Synthesis - Xilinx

In most instances, the Vivado tools also support Xilinx design constraints (XDC), which is based on the industry-standard Synopsys design constraints (SDC). IMPORTANT:Vivado synthesis does not support UCF constraints. Migrate UCF constraints to XDC constraints. For more information, see this link in the ISE to Vivado Design Suite Migration Guide

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