what is speed grade of FPGA?

[Sunita Jain]

Hi all,
Can somebody explain, what do we main by the speed grade of FPGA. What
is the significance of the nos they mention -4, -3 etc on
specifications..
Sunita

 

[Mike Lewis]

They are an indicator on how fast the FPGA will run .. ie. what
the maximum clock rate is that can be achieved.

"Sunita Jain" <sunitajain@gmail.com> wrote in message
news:9bfc40d7.0411091004.54c4de2b@posting.google.com...

Hi all,
Can somebody explain, what do we main by the speed grade of FPGA. What
is the significance of the nos they mention -4, -3 etc on
specifications..
Sunita

 

[Allan Herriman]

On Tue, 9 Nov 2004 13:50:58 -0500, "Mike Lewis" <someone@micrsoft.com>
wrote:

They are an indicator on how fast the FPGA will run .. ie. what
the maximum clock rate is that can be achieved.

Note that for some FPGA families, increasing numbers mean increasing
speed, whereas for some other FPGA families, increasing numbers mean
decreasing speed.

Moral: read the datasheet, or ask in news:comp.arch.fpga, where this
would be on topic.

Regards,
Allan