Reply by glen herrmannsfeldt●February 3, 20092009-02-03
Jan Pech <invalid@void.domain> wrote:
> I am not. From my experience with Virtex-5 and Spartan-3 I can say that
> Spartans are terribly slow. If you put MPMC into Virtex-5, you can reach
> pretty high data throughput. With a bit complex design in Spartan-3A you
> will have hard time to meet at least minimum clock frequency for DDR2
> devices. Hard-core memory controller in next generation Spartan devices
> might help a lot.
The Digilent Spartan3E board has on board DDR RAM.
I believe DDR, not DDR2, though, but presumably they believe
the 3E can do that. I haven't tried it yet.
-- glen
Reply by Jan Pech●February 3, 20092009-02-03
On Tue, 2009-02-03 at 15:12 +0000, Joseph H Allen wrote:
> I'm surprised that the Spartan-6 integrated memory controller does not support
> DIMMs. Also surprised that there are no integrated memory controllers in
> Virtex-6.
>
I am not. From my experience with Virtex-5 and Spartan-3 I can say that
Spartans are terribly slow. If you put MPMC into Virtex-5, you can reach
pretty high data throughput. With a bit complex design in Spartan-3A you
will have hard time to meet at least minimum clock frequency for DDR2
devices. Hard-core memory controller in next generation Spartan devices
might help a lot.
Jan
> Note the Virtex-6 Select-IO voltage range: only up to 2.5V! 2.5V is the
> new 5V...
>
>