SPEF Syntax
SPEF (Standard Parasitic Exchange Format) is documented in chapter 9 of IEEE 1481-1999. Several methods of describing parasitics are documented, but we are discussing only few important one.
General Syntax A typical SPEF file will have 4 main sections – a header section, – a name map section, – a top level port section and – the main parasitic description section. Generally, SPEF keywords are preceded with a *. For example, *R_UNIT, *NAME_MAP and *D_NET. Comments start anywhere on a line with // and run to the end of the line. Each line in a block of comments must start with //.
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