Chapter 5

Functional Descriptions

A Verilog functional (or Register Transfer Level) description describes a circuit in terms of its registers and the combinatorial logic between the registers.

The following sections of this chapter describe how to construct and use functional descriptions.

• “Sequential Constructs”
  
  
• “Function Declarations”
  
  
• “Function Statements”
  
  
• “task Statements”
  
  
• “always Blocks”