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Why my ATPG coverage in so low about Multiplier of design?

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liwei039

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Hi, all
When I do ATPG, the test coverage is about 25% of some multiplier? why?
I found other multiplier test coverage is up to 99%? does bus width and signed/unsigned data of multiplier make sense in here?
 

hi friend,

ur question is not clear. provide us the more information.
sunil budumuru
 

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