speed grade

[Altera_Forum]

Hi, 

 if i'm using CYCLONE III EP3C40F484C6 - that means that its speed grade is 6 . right?   Thanks, Fina.

[Altera_Forum]

Hi Fina, 

 Yes, of course,   You can see the Device Packaging Ordering Information in Cyclone III Handbook page 1-12..   Here the link : http://www.altera.com/literature/hb/cyc3/cyclone3_handbook.pdf

[Altera_Forum]

--- Quote Start ---  Hi,   if i'm using CYCLONE III EP3C40F484C6 - that means that its speed grade is 6 . right?   Thanks, Fina.  --- Quote End ---     Hi,  yes that's right. Keep in mind that it is not an exact indication of the max speed of the FPGA.   Kind regards  GPK

[Altera_Forum]

Thanks a lot for your answers :) :) :)  

 how can i know device max speed?

[Altera_Forum]

--- Quote Start ---  Thanks a lot for your answers :) :) :)    how can i know device max speed?  --- Quote End ---    Hi,  sorry, I was not exact enough in my post. The timing for e.g. PLL's, I/O, I/O standards could be used to decide which speed grade do you need for your application. What I mean in my first post is was that the internal clock speed depends on your design. When you look into the datasheet you find e.g. a number for the clocktree speed ( C8 402 MHz). This doesn't mean that your design could run at this speed.   Sorry for any confusion.  Kind regards  GPK

[Altera_Forum]

Thank you !