5. Scan Chains and Serial Testing

Try these first

1. 1.

   What is a scan chain?

   Hint

   Think about how data is shifted in a computer.

2. 2.

   What does scan-in do?

   Hint

   Consider what you do to introduce test data.

3. 3.

   What is a scan chain primarily used for?

   • To simplify circuit design
   • To improve circuit accessibility during testing
   • For power reduction

   Hint

   Think about access and visibility during testing.

4. 4.

   True or False: Scan chains can be used for testing analog circuits.

   • True
   • False

   Hint

   Consider the type of components discussed.

5. 5.

   Design a simple circuit diagram that incorporates a scan chain. Explain how you would implement serial testing in this design.

   Hint

   Think in terms of connecting elements and the flow of data.

6. 6.

   Evaluate the pros and cons of integrating a scan chain in a compact digital device. How does this affect design decisions?

   Hint

   Reflect on the balance required between performance and space.