Programmable Devices
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part of design disappear in technology map

leagend5489
Novice
500 Views

hi

 

I have a design that can be compiled. but part of design not use any source. I check RTL viewer, the part exist. but in technology map, it isn't existed.

 

Is it about timing constrait problem? 

 

thanks.

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leagend5489
Novice
483 Views

this problem is getting weird. I am closing this thread in this moment.

View solution in original post

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leagend5489
Novice
484 Views

this problem is getting weird. I am closing this thread in this moment.

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FvM
Honored Contributor I
461 Views

I'd like to give a general answer in case other forum users are reviewing the thread.

 

"Disappearing" logic is never caused by timing problems.

 

It's usually due to the fact that the synthesis tool removes any redundant logic. Redundant are all parts of your design that don't affect an output signal. Popular reasons are missing module connections,  unconnected clock or module is inadvertently hold in reset.

 

Regards

Frank

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