Silicon Speed

Thanks again anakha

I think I have things clear now, but just one more thing..

I was reading in a handbook a while back that in the classic timing analyzer, if I place a maximum or minimum delay constraint for an output pin, but only specify one, then quartus will attempt to match this exact time.

For example if I place a constraint of maximum delay 2 ns (without specifying a minimum delay), I understand that quartus will attempt to assign the ouput in 2 ns exactly. But if the temperture swings then this may not be possible?

So does quartus attempt to assign the output in 2 ns for typical corner only meaning that at the fast and slow corners the designer would have to expect a slight error?

Would it always be advisable to specify a maximum and minumum delay in this situation, to ensure than the contraint can be meet at all corners?

Thanks again.