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Course contents

  • How to Use This Course
  • Reading Path
  • CDC/RDC Glossary
  • CDC/RDC Metrics Reference
  • CDC/RDC Interview Prep
  • CDC/RDC Signoff Cheatsheet
  • Clock Domains and Failure Modes8
  • Metastability and Synchronizers16
  • CDC Protocols and Handshakes16
  • Reconvergence and Gray Coding16
    • Gray Code Crossing
    • Reconvergence Analysis
    • Multi-bit Crossing Strategies
    • Reconvergence Debug
      • Reading a Reconvergence Report
      • Worked Reconvergence Example
      • Fix and Recheck
      • Regression Guards
  • Reset Domain Crossing16
  • Architecture and Design Rules16
  • CDC Signoff Methodology24
  • RDC Signoff16
  • Debug and Case Studies11
  • CDC and RDC Interview Prep30
  • Capstone: Sign Off a Multi-clock Peripheral4
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‹Reconvergence and Gray Coding
  1. Topics
  2. CDC & RDC
  3. Reconvergence and Gray Coding
  4. Reconvergence Debug

Part 4 · Reconvergence and Gray Coding · All levels

Reconvergence Debug

Reading a reconvergence report, a worked failure-and-fix example, rechecking, and regression guards.

  • 4topics
  • 4lessons

A reconvergence finding is a question, and debugging is answering it with evidence: first read the report to locate the convergence point, then reproduce the skew in a model, then fix the structure and prove the finding gone without adding new ones. These four lessons walk that loop end to end.

Lesson

After it you can...

Reading a Reconvergence Report

Triage a report excerpt to the convergence point and the skew.

Worked Reconvergence Example

Show the failure and the fix in a self-checking model.

Fix and Recheck

Re-run structural and dynamic checks without adding violations.

Regression Guards

Keep reconvergence out with assertions and review rules.

Study in order: triage, then the worked example, then the recheck loop, then the guards that make the fix stick.

Check yourself A report lists three reconvergence findings on one block. Where do you start?

With the convergence point closest to a state-changing consumer (a strobe, a mode, a pointer): rank by what the mixture can corrupt, not by report order. Then reproduce that one first.

Related topics

  • Start: reading a report

  • Background: what is reconvergence

PreviousNext: Reading a Reconvergence Report

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See also

  • Gray Code Crossing
  • Reconvergence Analysis
  • Multi-bit Crossing Strategies