Xilinx Design Constraints files (XDC) are TCL scripts, which define timing and physical constraints for the synthesis and implementation flow in Xilinx Vivado.

Xilinx Design Constraints files (XDC) are a Xilinx extended version of Synopsis Design Constraints files (SDC). XDC files are TCL scripts, which define timing and physical constraints for the synthesis and implementation flow in Xilinx Vivado. Prior to the XDC format, constraints were defined in User Constraint Files (UCF), which are not supported by Vivado.

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