What is the maximum allowable rise time for general inputs and clock inputs?
In the Virtex, Virtex-E, Spartan-II, and Spartan-IIE data sheets, this value is described as Tin (Input signal transition time) under Recommended Operating Conditions." This value pertains to both general inputs and clock inputs.
Virtex / Spartan-II: Tin max = 250 ns
Virtex-E / Spartan-IIE: Tin max = 250 ns