ATPG constraints and cell constraints

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kiranvaddireddy

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can anyone help me understand the difference between atpg constraints, cell constraints and pin constraints in ATPG?
Im using mentor fastscan.


Thanks,
Kiran
 

Below is difference between all 3 constraitns :

ATPG constraints : applied for shift and capture both
Cell constraints : applied to scan cell only.
PI constraints : apply to Top level Input only and effect during capture only.

Hope you understand.

Regards,
Maulin Sheth
 
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