Chapter 6

Register and Three-State Inference

Foundation Express infers registers (latches and flip-flops) and three-state cells. This chapter is divided into two sections. These sections are divided into subsections that describe how to report inference results, control inference behavior, and infer cells.

• “Register Inference”
  
  
  • “Reporting Register Inference”
    
    
  • “Controlling Register Inference”
    
    
  • “Inferring Latches”
    
    
  • “Inferring D Flip-flops”
    
    

• “Three-State Inference”
  
  
  • “Reporting Three-State Inference”
    
    
  • “Controlling Three-State Inference”
    
    
  • “Inferring Three-State Drivers”
    
    
  • “Understanding the Limitations of Three-State Inference”