5.1. Introduction to Scan Chains and Serial Testing

Try these first

1. 1.

   What is a scan chain?

   Hint

   Think about how we might connect components in a sequence.

2. 2.

   What type of faults can serial testing detect?

   Hint

   Consider where signals might not change as expected.

3. 3.

   What is the main purpose of a scan chain?

   • To create a communication path
   • To enable testability of internal circuits
   • To enhance circuit performance

   Hint

   Think about what makes testing easier.

4. 4.

   Serial testing can only detect which type of faults?

   • True
   • False

   Hint

   Recall the different faults mentioned.

5. 5.

   Analyze a digital circuit design that uses scan chains. Identify potential downsides of its use and suggest improvements.

   Hint

   Consider what you know about design overhead.

6. 6.

   Propose a serial testing strategy for a complex SoC. Explain how you would ensure thorough fault detection.

   Hint

   Think about what makes fault detection comprehensive.