Assessing the Maximum Frequency of the Design - 2020.2 English

You can define and assess the maximum frequency (FMAX) in the following ways:

• The FMAX (MHz) a design can run on hardware in a given implementation = 1000/(T-WNS), with WNS positive or negative.

• The FMAX (MHz) a design can run on a given architecture = 1000/(T-WNS), only if WNS < 0. You must decrease T and rerun synthesis or implementation until WNS < 0. Different synthesis and implementation strategies are needed to get the best achievable FMAX.

Where:

• T is the target clock period (ns).
• WNS is the worst negative slack (ns) of the target clock.