Low Power / UPF · All levels
UPF Implementation Flow
Handoff of power intent from RTL to synthesis and physical design, with consistency checks across tools and views.
Section goal
Handoff of power intent from RTL to synthesis and physical design, with consistency checks across tools and views.
How to study this section
Start with each topic hub and sketch the domain/state model.
Use mechanism and reports pages to connect policy intent to evidence.
Practice debug and worked-example pages for review readiness.
Close with checklist and silicon impact before signoff discussions.
Topics
upf-rtl-handoff/ — UPF RTL Handoff
synthesis-upf-views/ — Synthesis UPF Views
pd-upf-implementation/ — PD UPF Implementation
upf-consistency-audit/ — UPF Consistency Audit
Related topics
Low-power deep dive
Cross-tool intent drift is a leading source of late low-power escapes.
Concept diagram
RTL+UPF -> synthesis view -> PD view -> signoff consistencyMetric graph
MISMATCH TREND
handoff week1 ███████
week2 ████
week3 ██Reports and artifacts
RTL handoff checklist
post-synth LP report
PD LP implementation report
consistency diff
Mini case study
Synthesis and PD used mismatched UPF revisions; only consistency audit exposed the drift.
Debug branches
Compare UPF revision tags
Check object rename mapping
Run semantic consistency tool
Senior review question
Ask: what transition evidence proves this topic is closed, and which owner signs it?
Execution drill pack 1
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 1
PATH: low-power/upf-implementation-flow
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 2
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 2
PATH: low-power/upf-implementation-flow
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 3
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 3
PATH: low-power/upf-implementation-flow
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 4
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 4
PATH: low-power/upf-implementation-flow
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>Execution drill pack 5
Use this pack to rehearse low-power closure on low-power/upf-implementation-flow: transition framing, policy ownership, implementation evidence, and release confidence.
Transition checklist
State transition explicitly named with legal source/target states.
Crossing and domain ownership are mapped and agreed.
Policy controls are traced to always-on source logic.
Waveform bookmarks align controls with state timestamps.
Review prompts
Which policy object is first to deviate from intent?
Which owner can apply the smallest reversible fix?
What regression matrix proves no collateral damage?
Which waiver conditions would still block release?
Evidence capsule
LP EVIDENCE CAPSULE 5
PATH: low-power/upf-implementation-flow
STATE WINDOW: <from -> to>
POLICY OBJECT: <isolation / retention / shifter / switch>
OWNER: <name>
PRIMARY ARTIFACT: <report/waveform/formal result>
RELEASE DECISION: <close / bounded waiver / escalate>