What is the problem of having combinational loop in a design?

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pd_engineer

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Hi,

What is the problem with having combinational loops in our design. why do we break it while doing synthesis.


Thanks
 

what is combinational loop

pd_engineer said:
Hi,

What is the problem with having combinational loops in our design. why do we break it while doing synthesis.


Thanks
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During the test mode, you cant determine the value of the combinational loop, it will be like a indefintie. So you need to break the combinational loop with simple or Gate with test mode signal to end the indefinite loop function.
 

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