Design Entry Tool

• Text based Hardware Description Languages (HDL)

  • VHDL
  • Verilog

• Schematics

• Visual Graph

  • State Diagram
  • Flow Chart

• Schematic Editor

  • Cell Library: Contains components to be used
  • Editing Functions: Place, Move, Delete, Connect, Rotate/Flip, Copy/Paste
  • Hierarchical Design: Modules contain lower-level schematics
  • Netlist Description Language: Electronic Design Interchange Format (EDIF)

Hierarchical Schematic

• (a) HADD Schematic
• (b) Schematic Symbol
• (c) Higher-level Schematic that makes use of HADD
• (d) Hierarchy of HADD