A new edition of this best-selling reference text, which makes writing complex VHDL (very high speed integrated circuit hardware description language) descriptions easy, even for designers with little or no previous experience. This text features a top-down approach that is easy to understand. It takes the reader from the basics to complex modelling techniques, with real-world examples, sample designs and extensive graphics illlustrating each step of the process. It also provides a complete design flow of a synthesizable vending machine controller from top-level description to gate-level implementation. This new edition features a more in-depth description of VHDL with Synthesis and reflects the IEEE 1164 standard modelling package.