Python library for working Standard Delay Format (SDF) Timing Annotation files.

From Wikipedia;

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 verification and Static timing analysis.

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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.

• python-sdf-timing GitHub Repository
• SDF Parser written in C++ -
• Verilog To Routing - Verilog to Routing can generate an SDF file for doing post implementation timing simulation.