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Oregon State UniversityECE 271_ECE_271_CH_4_Reading_Report

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ECE 271, Chapter 4 Reading Report Quentin Onyemordi May 11, 2020 1 Chapter 4 Outline This chapter is taking a different route on the outlook for logic and digital circuits by highlighting topics ... related to Hardware Description Languages (HDL’s). Giving another way of approaching the creation of combinational and sequential circuits. 1. Introduction In the past chapters of this book there was an emphasis on the design of schematics for both combinational and sequential logic. Although many of the methods we have discussed have been great for gaining a fundamental understanding of key concepts that go along with logic design, many of these methods are not necessarily the most efficient. These processes ,such as manual simplification of truth tables and Boolean equations, require a significant amount of work and are easy to make errors. Tackling the task of logic design is actually much more efficient when approached from a higher level of abstraction. This can be done by giving a computer aided design tool the information about which logical functions are necessary, and in turn the tool translates the information into logic gates. Specifications are generally via HDL which are written most commonly in the two languages System Verilog and VHDL. A module is known as a block or element of hardware that includes inputs and outputs. Logic gates, Cyclic circuits and multiplexers are all examples of modules and the common way of describing functionality of modules are behavioral and structural. Behavioral describes the behavior of the module whereas structural describes the module from a hierarchical perspective highlighting the module from its most basic components. The two major purposes for the use of HDL’s are simulation and synthesis. Simulation allows for the module to be tested and determine if it acts in the desired way. Humans are prone to making mistakes and because of the huge risk that goes with mistakes such as significant loss of money or life logic simulation has become an essential process to work out bugs. The synthesis aspect is a great tool in which the HDL module is actually converted into a netlist showing a visual representation of what types of logic gates are used and how they are configured. 2. Combinational Logic Since the way we approach building sequential circuits is by the unison of [Show More]

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