Speed grade, and maximum frequency?

Hello

Somewhere I had found that the definition of speed grade was the nanoseconds propagation delay.

I believed that if the speed grade is 8, it means 8 nseconds of propagation delay, and

1/8nseconds=125 MHz, But I was wrong.

Now I am working with the same Cyclone2 speed grade 8, and according with the tool of Quartus "Timing Analyzer", my design works up to 190MHz.

You are right the maximum frequency depends of the way you design.

Att.

Diego Botero