What are Delays in Verilog?
- Tell the computer how long signals take to move.
- Important for realistic simulation and finding timing issues.
Intra-Delay (Inside Wait / Gate Delay):
- Time it takes for a logic gate to produce an output after inputs change.
- Think: Processing time inside the gate.
- Syntax:
#<time>after the gate definition (e.g.,and #5 ...). - Example: An AND gate takes 5 time units to show the new output.
Analogy for Intra-Delay:
- Chef needs time to cook after getting ingredients.
Inter-Delay (Across Wire Wait / Net Delay):
- Time it takes for a signal to travel along a wire between components.
- Think: Travel time between parts.
- Syntax:
#<time>before assigning to a wire (e.g.,assign #3 wire = ...). - Example: Signal takes 3 time units to go from one part to another.
Analogy for Inter-Delay:
- Walking time to deliver a message between rooms.
Why are Delays Important?
- Realistic Simulation: Shows how the circuit acts in real-time.
- Finding Problems: Helps catch timing errors (too fast/slow).
- Speed Understanding: Shows how quickly the circuit can work.
Simple Summary:
- Intra: Delay inside a component.
- Inter: Delay between components.