OrCAD X Resources

10. If you scroll to the right, you will see all the fields populated, and the Min BB Via Gap value is already set (see image below). Now that the spacing constraint set has been created for any object in the BGA Region/area, we are ready to apply it to said region. 11. In CM, return to the left section Spacing - Region - All Layers to open the worksheet shown below. 12. Let's assign our new spacing constraint set to this BGA-REGION by clicking the cell in the column named Referenced Spacing CSet and choosing SCS_BGA-REGION. 13. Notice that all the cells (values under every column) get populated with the spacing rule we set just earlier (3 mils = 0.076 mm). 23 www.cadence.com Part 1 of 5

• Cover
• Part 1 - Introduction to Constraint Management
• What is Constraint Management?
• Problems Solved by Constraint Management
• Benefits of Proper Constraint Management
• Applications of Constraint Management
• Finding the Constraint Manager (CM)
• Understanding How the Constraint Manager Works
• Types of Constraints
• Electrical Constraints
• Physical Constraints
• Spacing Constraints
• Manufacturing Constraints
• High-Speed Design Constraints
• Understanding Net Classes, Net Groups, and Regions in PCB Design
• 1. Net Classes
• Example - Creating a Net Class
• 2. Net Groups
• Example - Create a Net Group
• 3. Regions
• Region Physical Constraint Set
• Region Spacing Constraint Set
• Manual Constraint Entry vs. Constraint Sets
• Applying The Constraint Region
• Key Differences and Implications Among Net Classes, Groups, and Constraint Regions
• Summary
• Conclusion to Part 1