The Student's Guide to VHDL
Elsevier Science, 1998. gada 1. janv. - 336 lappuses
VHDL is a language for describing digital electronic systems. A vital, efficient step in the system design process, VHDL allows for the design and simulation of a hardware system prior to it actually being manufactured.
Offering the same clear, accessible style as The Designer's Guide to VHDL, The Student's Guide is designed as a main text for introductory VHDL courses, and as a supplementary text for courses that require VHDL-based project work, such as computer architecture, digital design, and digital logic courses. This new condensed text also serves as a quick, self-teaching guide for practicing engineers who need to learn only the basics of VHDL.
1.3. rezultāts no 46.
EXAMPLE Here is a declaration of a physical type representing electrical resistance : type resistance is range 0 to 1E9 units ohm ; end units resistance ; Literal values of this type are written as a numeric literal followed by the unit ...
Each of these is called a design unit . Organizing a design as a hierarchy of modules , rather than as one large flat design , is good engineering practice . It makes the description much easier to understand and manage .
One final point to clarify about use clauses before looking at an extended example is the way in which they may be included at the beginning of a design unit , as well as in declarative parts within a library unit .
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