5.2.1. What is a Scan Chain?

Try these first

1. 1.

   What does a scan chain consist of?

   Hint

   Think about what elements are needed for testing internal states.

2. 2.

   What does scan-in mean?

   Hint

   It's the opposite of the output process.

3. 3.

   What is the primary function of a scan chain?

   • To encode data
   • To facilitate testing
   • To store data

   Hint

   Think about its role in observing internal conditions.

4. 4.

   Scan-in and Scan-out refer to?

   • True
   • False

   Hint

   Consider what the terms imply in terms of data flow.

5. 5.

   Design a basic scan chain for a 4-bit counter. Describe how you would implement scan-in and scan-out processes.

   Hint

   Visualizing the data flow can help simplify the design.

6. 6.

   Evaluate how the presence of scan chains might affect the overall design of an IC. Discuss potential trade-offs between efficiency and complexity.

   Hint

   Think about what benefits might justify the added complexity.