In the early design phase, padring design is one of the critical elements in design planning. The result from padring design not only will impact packaging, board level design, power integrity and signal integrity result, but also the overall product cost .In the past, padring design is often done through separate standalone tool like Orbit IO or internal excel estimation spreadsheet. The process of padring design is a tedious step as it involves a lot of hand editing and the quality of the padring placement rely on the experience of dedicated padring designer. The intend of this paper is to share the automated unified padring design methodology where single design database is referenced hence padring design will always be in sync with fullchip backend database. The automated unified padring flow allows consistent cross functional review reference point, better controllability for core and padring design integration and enhance the padring design process efficiency by minimizing the experience gap of the padring designer in charged. Hopefully the methodology proposed will benefit the padring designers in floorplanning and product cost estimation through unified padring flow.
On-chip variation (OCV) analysis is one of the design issues faced by STA owners in advance technology node. In the past, typical OCV analysis assumed the worst process variation at transistor channel length as part of process corner definition during timing signoff. However, with the increase of intra-die variations due to the continually shrinking fabrication technology node, traditional process corner definition with timing uncertainty alone is insufficient. A large timing uncertainty will introduce excessive pessimism into the timing budget, as well as unnecessary leakage power, which is undesirable in battery application devices. The intention of this paper is to provide a comparison overview of ASIC design margin methodology for intra-die variations during timing signoff. Hopefully, these findings will benefit the ASIC STA planner in reducing the timing margin, as well as leakage power, through reduction in timing margin pessimism.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.