Setup time or Hold time

[bsbs]

In case if Setup time violation and hold time violation,which should be resolved first ?Which is more critical

 

[jeffrey samuel]

where and what is the application you are doing what is your problem

post a schematic it will be helpful

 

[bsbs]

I just wanted to know which one is more critical as there is no direct relation between them and Hold time is taken care in complex designs automatically.

 

[dftrtl]

Setup is critical from design point of view as it differentiates at which speed your design is working.

 

[bsbs]

why is it said that hold violations are more dangerous than setup violations?

 

[barry]

Either violation will cause a failure; one is not 'worse' than the other. If you violate either constraint then you can't know what the output of a register will be.

 

[birdy123]

In case if Setup time violation and hold time violation,which should be resolved first ?Which is more critical

Hi Bsbs,

hold is more critical now a days. You should fix hold first and then concentrate on the setup violation. In worst case let's assume you can not able to fix the setup violation , then you can slow down you chip/design and it will work. At least there will be no functional violation only your chip will be little slow.
For more detail I will prefer you to read the series of following post.

How to fix setup and hold violation