Graybox in ATPG Notes. with DFT

Gray Box Overview and Case Analysis

Need of a Gray-box?

What is a Gray-box?

Generation of the Graybox

Example 1

Example 2: Generating a graybox for a design with EDT logic

Example 3

Example 4

1. Unwrapped Ports
2. Retain only the necessary logic
3. Library issue
4. Reduce the gray-box size

• Black-box Intest EDT
• Constraint TE pin of clock gater
• Add a dedicated wrapper