clock definition

Thank you for all your answers.

Perhaps I should start another thread for this question but I thought I'd just ask it real quick.

In one of my designs I'm getting a limit to fmax due to "maximum I/O toggle speed"

I researched this item and I know it's a logic opinion which is set via the assignment editor.

The problem is when I look in the assignment editor nothing is set, any ideas?

Is it a technology setting which I cannot unset from the chip datasheet specs?

ps....I already have the timequest users guide....great work thank you for writing it.

drforbin