Logic Design with Behavioral Models of Combinational and Sequential Logic

1. Logic Design with Behavioral Models of Combinational and Sequential Logic

2. Behavioral Modeling • Structural modeling • Connects primitive gates and/or functional units to create a specified functionality. • Behavioral modeling • The functionality of a design • The input-output model of a logic circuit and suppress details about its low-level internal structure and physical implementation.

3. Data type • Nets • Net variables act like wires in a physical circuit and establish connectivity between design objects. • wire • Registers • Register variables act like variables in ordinary procedural languages • reg • integer

4. Boolean-Equation-Based Behavioral Model of combinational Logic

5. Propagation Delay and continuous Assignments • Propagation delay can be associated with a continuous assignment so that its implicit logic has the same functionality and timing characteristics as its gate-level counterpart

6. Latches and Level-Sensitive Circuits in Verilog

7. Cyclic Behavioral Models of Flip-Flops and latches • Keyword : always

8. A comparison of styles for behavioral Modeling • Continuous-assignment Models • Dataflow/RTL Models • Algorithm-Based Models • Simulation with Behavioral Models

9. Continuous-Assignment Models

10. Dataflow/RTL Models

11. Algorithm-Based Models

12. Functions vs Tasks

13. Tasks

14. Functions