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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-Aware Partitioning
    • Clock Gating and Muxing
    • Interface and IP Rules
      • IP and Macro Boundaries
      • Async Interfaces: Config and Status
      • Documenting Crossings
      • Interface Checklists
    • Quasi-Static Signals and Configuration
  • 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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‹Architecture and Design Rules
  1. Topics
  2. CDC & RDC
  3. Architecture and Design Rules
  4. Interface and IP Rules

Part 6 · Architecture and Design Rules · Intermediate

Interface and IP Rules

Crossings inside hard IP and across macro boundaries, async configuration and status patterns, documenting crossings, and checklists.

  • 4topics
  • 4lessons

Inside one team the crossing inventory is hard enough. At an interface, half the information sits with the other party: the IP provider knows what is inside the macro, and the integrator knows the clocks it will meet. This topic sets the rules for that handoff in both directions.

Learning path through the interface and IP rules topic.
Suggested order. Know what hides inside IP, then the standard async patterns, then how to write them down and check them.

The four lessons

Lesson

After it you can...

IP and Macro Boundaries

Say what the integrator must know and document about crossings inside hard IP.

Async Interfaces: Config and Status

Pick handshake, shadow register, or qualified capture for each direction.

Documenting Crossings

Write an interface specification that signoff can be set up from.

Interface Checklists

Walk the integration and handoff checklists without missing a row.

Check yourself Why do interface rules come after the gating and partitioning topics?

Because an interface specification has to name domains, crossings, and protocols. Partitioning, boundary discipline, and gated-clock classification produce exactly the facts the specification writes down.

Related topics

  • Crossing Inventory

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See also

  • CDC-Aware Partitioning
  • Clock Gating and Muxing
  • Quasi-Static Signals and Configuration