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What is Standard Parasitic Exchange Format mean?
Standard Parasitic Exchange Format (SPEF) is an IEEE standard for representing parasitic data of wires in a chip in ASCII format. Non-ideal wires have parasitic resistance and capacitance that are captured by SPEF. These wires also have inductance that is not included in SPEF. SPEF is used for delay calculation and ensuring signal integrity of a chip which eventually determines its speed of operation.
SPEF is the most popular specification for parasitic exchange between different tools of EDA domain during any phase of design.
The specification for SPEF is a part of the 1481-1999 IEEE Standard for Integrated Circuit (IC) Delay and Power Calculation System. The latest version of SPEF is part of 1481-2009 IEEE Standard for Integrated Circuit (IC) Open Library Architecture (OLA) .
SPEF is extracted after routing in Place and route stage. This helps in the accurate calculation of IR-drop analysis and other analysis after routing. This file contains the R and C parameters depending on the placement of a tile/block and the routing among the placed cells.
referencePosted on 16 Sep 2024, this text provides information on Miscellaneous in General related to General. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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