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Course contents

  • RTL Foundations36
  • Combinational Design25
  • Sequential Design27
  • FSM & Control27
  • Timing & Clocking39
  • Reset & CDC34
  • Memory & Buses57
  • Advanced RTL28
  • Senior & Interview76
    • Low-Power RTL Hub
    • DFT and Scan Hub
    • Physical Awareness Hub
    • Waveform Debug Hub
    • STA and ECO Hub
    • RTL-to-Implementation Closure
    • DFT-Ready RTL
    • Capstone: Resilient Streaming Peripheral
      • Stage 1: Specification
      • Stage 2: CSR and Control
      • Stage 3: Buffered Streams
      • Stage 4: CDC and Reset
      • Stage 5: Arithmetic and Reliability
      • Stage 6: Verification
      • Stage 7: Constraints and Implementation
      • Stage 8: Signoff Review
    • Principal Design Review
    • Senior RTL Interview Questions & Model Answers
  • Glossary and Notation
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‹Capstone: Resilient Streaming Peripheral
  1. Topics
  2. RTL Design
  3. Senior & Interview
  4. Capstone: Resilient Streaming Peripheral
  5. Stage 8: Signoff Review

Part 9 · Senior · Senior

Stage 8: Signoff Review

Present requirements, architecture, evidence, residual risks, waivers, and the release decision as one coherent package.

Why this matters

A design can pass functional conservation and still be rejected: no held-data arrival bound, an unresolved reset epoch, or latency over 24 IO periods. Signoff is an argument backed by evidence, not a checklist.

After this lesson you can: run a signoff review that traces each requirement to a test, report and owner, and decide approve, conditional approve or reject with named actions.

  1. Restate supported modes, parameters, performance, and exclusions.

  2. Walk requirement-to-evidence traceability.

  3. Review the worst functional, CDC, timing, power, DFT, and reliability risks.

  4. Open every waiver with owner, rationale, evidence, expiry, and impact.

  5. Show reproducible report revisions and unresolved issue disposition.

  6. Record approve, conditional approve, or reject with named actions.

The review closes the same resilient streaming peripheral introduced at the hub. It does not substitute generic checklists for evidence: each claim points to a specification row, test or assertion, implementation report, and named owner.

For CP-1, release remains pending until the learner supplies the integrated design/harness and fresh evidence for CP-CTRL through CP-PROGRESS. The filled baseline and traces are a design/review starting point, not completed hardware. Example decision: reject release if functional conservation passes but the held-data arrival bound is absent, a reset epoch remains unresolved, or measured no-stall latency exceeds 24 IO periods; assign a named correction and rerun affected evidence.

Fill-in review template

Copy this table into the review package. One row per requirement; a row with an empty evidence cell blocks approval.

Requirement

Evidence (test, assertion or report)

Revision

Owner

Status

CP-CTRL

_____

_____

_____

open

CP-NUM

_____

_____

_____

open

CP-PKT

_____

_____

_____

open

CP-CLOCK

_____

_____

_____

open

CP-BUF

_____

_____

_____

open

CP-LAT

_____

_____

_____

open

CP-FAIL

_____

_____

_____

open

CP-REL

_____

_____

_____

open

CP-PARAM

_____

_____

_____

open

CP-PROGRESS

_____

_____

_____

open

Status is one of open, pass, waived (with owner and expiry) or fail. The reviewer questions below test whether the evidence in each row is strong enough.

Reviewer question

Strong evidence

Can data be lost?

Conservation scoreboard, boundary assertions, mutation result

Can reset strand a transaction?

One-sided reset tests and recovery state diagram

Does timing cover every clock?

Clock inventory, constraint audit, unconstrained-path zero

What happens on UE?

Injected waveform, poison/stop behavior, CSR/IRQ record

Can software recover?

Driver sequence for status, clear, abort, and restart

Can the result be reproduced?

Locked manifest of sources, parameters, tools, libraries, and reports

Interview

Present the capstone as a release argument: contracts, architecture, failure handling, measured evidence, trade-offs, and residual risks. Code is one part of that argument.

Check yourself When is a conditional approval appropriate?

When residual work is bounded, owned, deadline-backed, and cannot invalidate already accepted evidence; otherwise the correct decision is reject.

Remember

  • Every claim points to a specification row, a test or assertion, an implementation report and an owner.

  • Every waiver has an owner, rationale, evidence, expiry and impact.

  • Conditional approval fits only when the remaining work is bounded, owned and cannot invalidate accepted evidence.

Rule of thumb: present the capstone as a release argument; code is one part of it.

Keep going

  • Interview: run a mock interview on this topic

Related topics

  • RTL course hub

  • Senior interview preparation

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See also

  • Stage 1: Specification
  • Stage 2: CSR and Control
  • Stage 3: Buffered Streams