Timing Constraints in the UCF

Software & Version:
2.1i

Audience
Designers with Xilinx FPGA design experience.

Prerequisites
1) Getting Started class or significant FPGA design experience
2) Constraints Editor I module

What is the level of the material?
Level II - Intermediate

Training Duration
1 Hour

Content Description
This module will explain three popular timing constraints: (1) period, (2) offset, and (3)from:to. Examples will be given on how to use each in the User Constraints File (UCF).

Objectives
After completing this training, student will be able to:

• Define the PERIOD and OFFSET constraints
• State the syntax for the PERIOD and OFFSET constraint in the UCF
• Explain the syntax of the FROM:TO constraint
• Describe how to create a time group using TNM

Topics or Training Outline

• Overview
• Period
• Offset From:To
• TNM
• More examples/info
• Summary

Supporting Files
None

References
http://support.xilinx.com/support/techsup/journals/index.htm
Libraries Guide, Chapter 12

Teaching Activities
Review questions
Test

Instructor Notes
None