AR# 39749


Design Assistant for XST - Help with XST Options/Constraints/Attributes


Please refer to this answer record for help with XST Options/Constraints/Attributes.

Note: This Answer Record is a part of the Xilinx Solution Center for XST (Xilinx Answer 38927). The Xilinx Solution Center for XST is available to address all questions related to XST. Whether you are starting a new design or troubleshooting a problem, use the Solution Center for XST to guide you to the right information.


XST Options, also known as XST properties, Constraints or Attributes,help you toobtain an optimalSynthesis result based on which you willachievebetter design performance. You can use XST Options to control how XST Synthesizes your design, such as HDL sources handling, inferred logic handling, whether or not to use a Synthesis algorithm, and etc.

XST Options are used for Synthesis process.They can be set globally or applied tocertain modules,instances or signals within the RTL or XCF file.

See (Xilinx Answer 37221) for help applying a constraint globally.

See (Xilinx Answer 39649) for help applying a constraint within the RTL.

See (Xilinx Answer 39650) for help applying a constraint with an XCF.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
38927 Xilinx Solution Center for XST N/A N/A

Associated Answer Records

AR# 39749
Date 02/17/2013
Status Active
Type General Article
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