Standard Delay Format


Standard Delay Format

Standard Delay Format (SDF) is an IEEE standard for the representation and interpretation of timing data for use at any stage of an electronic design process. It finds wide applicability in design flows, and forms an efficient bridge between Dynamic Timing Simulations and Static timing analysis

It was originally developed as an OVI standard, and later modified into the IEEE format. Technically only the SDF version 4.0 onwards are IEEE formats.

It is an ASCII format that is represented in a tool and language independent way and includes path delays, timing constraint values, interconnect delays and high level technology parameters.

It has usually two sections: one for interconnect delays and the other for cell delays.

SDF format can be used for back-annotation as well as forward-annotation.

See also: VITAL, EDIF

External links

*http://www.eda.org/sdf/
* [http://www.eda.org/sdf/sdf_3.0.pdf Standard Delay Format Specification in PDF format, version 3.0 (1995)]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Standard Parasitic Exchange Format — (SPEF) is an IEEE standard for representing parasitic data of wires in a chip in ASCII format. Resistance, capacitance and inductance of wires in a chip are known as parasitic data. SPEF is used for delay calculation and ensuring signal integrity …   Wikipedia

  • standard — 1. standard [ stɑ̃dar ] n. m. et adj. inv. • 1857; h. 1702; mot angl. « étalon, type », a. fr. estandard, frq. °standhard « inébranlable » → étendard 1 ♦ Type, norme de fabrication. Spécialt Ensemble des caractéristiques définissant un système de …   Encyclopédie Universelle

  • Delay calculation — is the term used in integrated circuit design for the calculation of the gate delay of a single logic gate and the wires attached to it. By contrast, static timing analysis computes the delays of entire paths, using delay calculation to determine …   Wikipedia

  • Standard cell — For the battery used as a voltage reference, see Weston cell. In semiconductor design, standard cell methodology is a method of designing Application Specific Integrated Circuits (ASICs) with mostly digital logic features. Standard cell… …   Wikipedia

  • Robots exclusion standard — selfref| For restricting Wikipedia bots, see .|The robot exclusion standard, also known as the Robots Exclusion Protocol or robots.txt protocol, is a convention to prevent cooperating web spiders and other web robots from accessing all or part of …   Wikipedia

  • Graphics Interchange Format — Infobox file format name = Graphics Interchange Format caption = A rotating globe in GIF format. The gradient blue areas of this image transition choppily, a common artifact produced when dithering is not employed. extension = .gif mime =… …   Wikipedia

  • IATA delay codes — For other uses, see IATA (disambiguation).IATA Delay Codes were created to help airlines standardize why a commercial flight left late from its departure airport.Previously every airline had its own system, so IATA standardized the format of… …   Wikipedia

  • Robots Exclusion Standard — Nach der Übereinkunft des Robots Exclusion Standard Protokolls liest ein Webcrawler (Robot) beim Auffinden einer Webseite zuerst die Datei robots.txt (kleingeschrieben) im Stammverzeichnis (Root) einer Domain. In dieser Datei kann festgelegt… …   Deutsch Wikipedia

  • Emission standard — Emission standards are requirements that set specific limits to the amount of pollutants that can be released into the environment. Many emissions standards focus on regulating pollutants released by automobiles (motor cars) and other powered… …   Wikipedia

  • Dirac (video compression format) — Schrödinger Developer(s) David Schleef Stable release 1.0.10 / October 7, 2010; 12 months ago (2010 10 07) Operating system Cross platform …   Wikipedia