DIFFERENCE BETWEEN DATAFLOW BEHAVIORAL AND STRUCTURAL MODELING STYLE.

DIFFERENCE BETWEEN DATAFLOW BEHAVIORAL AND STRUCTURAL MODELING STYLE.

DATAFLOW

The view of data  flowing through a design from input to output an operation is defined in terms of a collection of data transformation expressed as concurrent statement.

It is a set of concurrent statements.

Logical equations.

Represents behaviour.

Involve structure.

Level of abstraction is algorithmic.

Require Boolean equations as design specifications.

BEHAVIOURAL

The functional or algorithmic expects of a design expressed in a sequential VHDL process.

It consists sequential program statements.

Binary numbers(two) Addition.

Represents behaviour.

Cannot contain structure information.

Level of abstraction is Gate.

Require truth table as design specifications.

STRUCTURAL The view closest to hardware a model where the components of a design are interconnected. This view is expressed by component instantiations. It is a set of interconnected components. Interconnection of Gates. Structure explicit. Probability to(may) be hierarchical. RTL(register-transfer level) level. Require logical design as design specification.