Force PI and Measure PO

[vikasec089]

can anybody explain in detail the concept of force PI and Measure PO, also tell me the advantage of measure PO in ATPG patteren verification

 

[rca]

During the capture phase, you could cover or not the non scan I/O pad with this force PI (before clock pulse of capture), and capture PO after the clock capture pulse.
This will cover the combinational logic between the non scan pad (PI) and the first flops, and the logic between the flop and the Output pad (PO)