Reading VHDL BNF


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Reading VHDL BNF
Reading VHDL BNFAfter the basic concepts of VHDL are understood, the designer might want to try to write VHDL in a more elegant manner. To fully understand how to apply all of the syntactic constructs available in VHDL, it is helpful to know how to read the VHDL Bachus-Naur format (BNF) of the language. This format is in Appendix A of the IEEE Std 1076-1987 VHDL Language Reference Manual (LRM), pages A–1 to A–17. This format specifies which constructs are necessary versus optional, or repeatable versus singular, and how constructs can be associated.BNF is basically a hierarchical description method, where complex constructs are made of s…
Citation
Douglas L. Perry: VHDL : Programming By Example, Fourth Edition. Reading VHDL BNF, Chapter (McGraw-Hill Professional, 2002), AccessEngineering Export