Standard Delay Format
Encyclopedia
Standard Delay Format 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
Static timing analysis
Static Timing Analysis is a method of computing the expected timing of a digital circuit without requiring simulation.High-performance integrated circuits have traditionally been characterized by the clock frequency at which they operate...
It was originally developed as an OVI
OVI
OVI may refer to:* Ohio Volunteer Infantry, volunteer regiment during the American Civil War* Operating a Vehicle under the Influence * Optically Variable Ink, anti-counterfeiting measure in currencyOvi may refer to:...
standard, and later modified into the IEEE format. Technically only the SDF
SDF
SDF may refer to:* Louisville International Airport , an airport in Louisville, Kentucky, USA* Seoul Digital Forum, an international digital technology conference held annually in Seoul, Korea...
version 4.0 onwards are IEEE formats.
It is an ASCII
ASCII
The American Standard Code for Information Interchange is a character-encoding scheme based on the ordering of the English alphabet. ASCII codes represent text in computers, communications equipment, and other devices that use text...
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
VITAL
VITAL is a suite of digital asset management products by VTLS based on the open source Fedora architecture.It was unveiled at the 2004 American Library Association's Midwinter Meeting. Version 2.0 was released November 29, 2005 after acceptance testing by Australian Research Repositories Online to...
, EDIF
EDIF
EDIF is a vendor-neutral format in which to store Electronic netlists and schematics. It was one of the first attempts to establish a neutral data exchange format for the electronic design automation industry. The goal was to establish a common format from which the proprietary formats of the EDA...
External links
- http://www.eda.org/sdf/
- Standard Delay Format Specification in PDF format, version 3.0 (1995)