min skew check

[stanford]

Why do we have a check for min skew? What does this help avoid?

Thanks!

 

[oratie]

For example: if you have zero clock skew, all flops will switch at the same time. It will cause big IR-drop.

 

[stanford]

ah thanks, any other reasons?

 

[oratie]

Another example is "Source-Synchronous clocking". Clock signal delay can not be less than data signal delay.

 

[stanford]

Another example is "Source-Synchronous clocking". Clock signal delay can not be less than data signal delay.

Why do you want delay_clk > delay_data in Source-Synchronous path? Wouldn't this make the hold violation worse?