Chapter 5

Design Constraints

This chapter describes constraints, options, and attributes supported for use with XST.

This chapter contains the following sections.

• "Introduction"

• "Setting Constraints and Options"

• "XST Constraints"

• "HDL Inference and Optimization"

• "FPGA Options"

• "CPLD Options"

• "Summary"

• "Implementation Constraints"

• "Third Party Constraints"

• "Constraints Precedence"