Term · Physical Design & Signoff
Halo
A keep-out margin drawn around a macro in which standard cells may not be placed, reserving space for pin access routing, power straps and buffering near the macro edge.
- Also known as
- Keepout margin, Blockage halo
- Type
- Term
- Domain
- Physical Design & Signoff, Floorplanning
Notes
Too small a halo shows up later as unroutable macro pins rather than as a placement error.
Related terms
Part of the Physical Design & Signoff glossary, with every term in the topic and the lifecycles, tools and standards that use them.
Where it appears on the Hub
No other page of the Hub uses this term yet.
Suggest an improvement
Suggest an improvement to this entry
A clearer definition, an example, a correction or a source an editor can check. Editors review every suggestion before the entry changes.
Last reviewed: not yet reviewed in depth. Entry last updated . The full glossary