Design Hierarchies


Design Hierarchies

Bottom up Design

The Traditional method of electronic design is bottom up. Each design is performed at the gate level using the standard gates .With increasing complexity of new designs this approach is nearly impossible to maintain. It gives way to new structural, hierarchical design methods. Without these new design practices it would be impossible to handle the new complexity


Figure 1 Bottom Up Design

Top-Down Design

A real top down design allows early testing, easy change of different technologies, a structured system design and offers many other advantages. But it is very difficult to follow a pure top-down design. Due to this fact most designs are mix of both the methods. Implementing some key elements of both design styles


Figure 2 Top-Down Design