5.4. Advantages of Scan Chains and Serial Testing

Try these first

1. 1.

   What is a scan chain?

   Hint

   Think about how the flip-flops are arranged.

2. 2.

   How do scan chains improve testing efficiency?

   Hint

   Consider how automation can save time.

3. 3.

   What is a key advantage of scan chains in testing?

   • Lower production costs
   • Simplified access to internal circuitry
   • Increased complexity

   Hint

   Think about what makes testing easier.

4. 4.

   True or False: Scan chains only detect combinational faults.

   • True
   • False

   Hint

   Consider the types of faults tested.

5. 5.

   Critically analyze the trade-offs between implementing scan chains in a system versus the potential increase in design complexity.

   Hint

   Consider both sides: how do benefits weigh against complexities?

6. 6.

   Given a hypothetical complex SoC, outline a testing plan utilizing scan chains that maximizes fault coverage.

   Hint

   Think of how scan chains facilitate access and control across the layout.