A Designer’s Guide to VHDL Synthesis - download pdf or read online
By Douglas E. Ott
A Designer's advisor to VHDL Synthesis is meant for either layout engineers who are looking to use VHDL-based common sense synthesis ASICs and for managers who have to achieve a realistic figuring out of the problems all in favour of utilizing this know-how. The emphasis is positioned extra on sensible functions of VHDL and synthesis according to genuine stories, instead of on a extra theoretical method of the language.
VHDL and good judgment synthesis instruments supply very robust features for ASIC layout, yet also are very advanced and signify an intensive departure from conventional layout equipment. this example has made it tricky to start in utilizing this expertise for either designers and administration, seeing that an important studying attempt and `culture' swap is needed. A Designer's consultant to VHDL Synthesis has been written to aid layout engineers and different execs effectively make the transition to a layout technique in response to VHDL and log synthesis rather than the extra conventional schematic dependent strategy. whereas there are many texts at the VHDL language and its use in simulation, little has been written from a designer's point of view on tips to use VHDL and common sense synthesis to layout actual ASIC structures. the cloth during this booklet relies on adventure received in effectively utilizing those innovations for ASIC layout and is predicated seriously on life like examples to illustrate the rules concerned.
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Additional resources for A Designer’s Guide to VHDL Synthesis
Part of every design cycle is also the need to accommodate the inevitable changes that are identified after the detailed design has begun. With VHDL synthesis, considerable savings are gained from the relative ease of making rapid design changes throughout the design process. Improved Design Quality: Overall design quality can be improved due Introduction 9 to two factors, the capability to easily explore different design techniques and the ability of the synthesis tool to selectively optimize a design for improved performance or minimum gate count.
Simulation is heavily used throughout the ASIC design cycle and typically uses a combination of VHDL for the actual design and the ASIC vendor's certified or "golden" logic simulator for the final design verification. For all of these activities, the same test patterns should be used for both sets of simulators, and the output results should be compared, to ensure that the final gate level ASIC design matches the original VHDL design. The simplest means of accomplishing this is to generate both sets of test patterns from the VHDL "test bench" used to simulate the VHDL design.
Debugging Design Problems: One of the "disadvantages" associated with VHOL synthesis is that the output is an automated synthesized product, which means that the resulting gate-level design has been computer generated, not human created. In an ideal situation, the designer should not need to examine this gate-level design, but, until synthesis tools are tightly integrated with ASIC layout tools, there is always the Introduction 13 possibility that a timing problem could occur due to layout effects.
A Designer’s Guide to VHDL Synthesis by Douglas E. Ott