5.4.2. Comprehensive Fault Detection

Try these first

1. 1.

   What is a scan chain?

   Hint

   Think about how these flip-flops are arranged.

2. 2.

   Name one type of fault that scan chains help identify.

   Hint

   Consider faults that lock a signal at a specific value.

3. 3.

   What type of fault occurs when an output signal is fixed?

   • Stuck-at Fault
   • Delay Fault
   • Bridging Fault

   Hint

   Consider which faults involve a signal not changing as expected.

4. 4.

   True or False: Scan chains cannot detect bridging faults.

   • True
   • False

   Hint

   Recall if scan chains have any observable advantages.

5. 5.

   You are tasked with designing a digital circuit that must achieve high fault coverage. Discuss how you would incorporate scan chains into the design and the considerations you would make.

   Hint

   Think about the trade-offs betweenEase of testing and design complexity.

6. 6.

   Critically evaluate how scan chains can impact yield and reliability in manufacturing processes. What potential challenges might you face?

   Hint

   Consider both the benefits and the drawbacks of increased testing efficiency.