SDC Constraints • Chapter 08

Chapter 08: Combinational & Modal Analysis

set_case_analysis, set_disable_timing, combinational feedback loops, mode-based timing constraints, and operational modes.

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Authored by VLSI Veteran (9+ Years Experience)

Practical physical design signoff insights, real Primetime flows, and interview preparation.

💡 Key Technical Topics Covered

set_case_analysis (Logic 0, 1, Rising, Falling)
set_disable_timing for Breaking Feedback Loops
Func vs Test Mode Constraint Management
Combinational Path Delay Constraints (set_max_delay)

🎯 VLSI Physical Design Interview Questions Addressed

How do you use set_case_analysis to disable test mode during functional STA?
What is set_disable_timing and when is it safe to use?
How do you constrain purely combinational paths in SDC?

← Chapter 07: Multicycle Paths Chapter 09: Managing Constraints →