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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
  • Reset Domain Crossing16
  • Architecture and Design Rules16
  • CDC Signoff Methodology24
  • RDC Signoff16
  • Debug and Case Studies11
  • CDC and RDC Interview Prep30
    • CDC/RDC Whiteboard Framework
    • CDC/RDC Framework Drills
      • Drill Set: Single Bit
      • Drill Set: Multi-Bit and FIFO
      • Drill Set: Reset and RDC
    • Scenario: Metastability Bug
    • Scenario: Metastability Escape in Silicon Bring-up
    • Scenario: Async FIFO Pointer Mismatch
    • Scenario: Waiver Debate
    • Scenario: RDC Waiver Under Tapeout Pressure
    • CDC/RDC Interview Q&A Bank
    • CDC/RDC Interview Q&A Bank (Expanded)
  • Capstone: Sign Off a Multi-clock Peripheral4
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‹CDC and RDC Interview Prep
  1. Topics
  2. CDC & RDC
  3. CDC and RDC Interview Prep
  4. CDC/RDC Framework Drills

Part 10 · Interview Prep · All levels

CDC/RDC Framework Drills

Timed drill sets that make the answer framework fast: single-bit, multi-bit and FIFO, reset and RDC.

  • 3topics
  • 3lessons

Frameworks are slow until drilled. Each set below has six short prompts with a model answer outline: cover the whiteboard, speak for two minutes per prompt using Assumption, Mechanism, Trade-off, Evidence, then compare against the outline and score yourself with the rubric. Aim for level 3 or better on every prompt before moving to the scenarios.

Lesson

After it you can...

Drill Set: Single Bit

Answer six single-bit crossing drills with mechanism and evidence inside two minutes each.

Drill Set: Multi-Bit and FIFO

Answer six bus, Gray code and FIFO drills including depth and pointer questions.

Drill Set: Reset and RDC

Answer six reset synchroniser, sequencing and RDC drills with ordering arguments.

Do one set per sitting. The outlines are deliberately sparser than full answers: if you can expand the outline to a level-3 answer without notes, the drill is done.

Check yourself How do you know a drill set is finished?

When you can speak each outline into a level-3 answer, mechanism plus pattern plus evidence, in about two minutes without notes.

Related topics

  • Back: Whiteboard Framework

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See also

  • CDC/RDC Whiteboard Framework
  • Scenario: Metastability Bug
  • Scenario: Metastability Escape in Silicon Bring-up