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9/2/2012. 55:032 - Introduction to Digital Design. Page 2. Overview. Component and signal declarationsComponent instantiationsHierarchical structuresPackagesName spaces and scope. 9/2/2012. 55:032 - Introduction to Digital Design. Page 3. Schematic Vs. VHDL. Structural VHDL models the structure
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1. 9/2/2012 55:032 - Introduction to Digital Design Page 1 Structural Modeling in VHDL
2. 9/2/2012 55:032 - Introduction to Digital Design Page 2 Overview Component and signal declarations
Component instantiations
Hierarchical structures
Packages
Name spaces and scope
3. 9/2/2012 55:032 - Introduction to Digital Design Page 3 Schematic Vs. VHDL Structural VHDL models the structure of a circuit; similar to circuit schematic
Defines the circuit components
Describes how components are connected
System behavior or functionality is indirectly defined; model only lets components work in a certain, defined way.
Symbolic analysis allows us to determine functionality of system from understanding component behaviors
4. 9/2/2012 55:032 - Introduction to Digital Design Page 4 Example Schematic