toggle rate assignments

Hello,

interesting question! The document implies, that toggle_rate, a parameter that can be assigned to pins, would be evaluated in signal integrity analysis. Unfortunately, this isn't mentioned at any place neither in Quartus Handbook nor in device manuals, where pin placement rules are explained. Thus I guess, the information is either simply incorrect or is about a feature to come.

However, I don't see how a toggling rate should exactly be evaluated in SSO (simultanous switching output) signal integrity rules.

Regards,

Frank