Dolphin <Karel.Deprez@gemidis.be> wrote:

>Hello,
>
>Has anybody tried to use MIG with a Spartan 3 to generate a memory
>controller that has a big DQ bus? I would like to generate a core that
>controls 7 chips (x16), this results in 112 DQ pins. The chips would
>use a clock of 133MHz.
>
>Has anybody got experience with the MIG tool? Is it user-friendly or
>do you prefer to write your own DDR core?
 
I'd recommend writing your own core. The designs created by MIG are
demonstrators when it comes to Spartan 3 and have too much
restrictions when it comes to which pins can be used. Besides, I think
133MHz is pushing the limits of the device. You probably need faster
(166MHz) DDR memory in order to meet timing.

-- 
Programmeren in Almere?
E-mail naar nico@nctdevpuntnl (punt=.)

Hello,

Has anybody tried to use MIG with a Spartan 3 to generate a memory
controller that has a big DQ bus? I would like to generate a core that
controls 7 chips (x16), this results in 112 DQ pins. The chips would
use a clock of 133MHz.

Has anybody got experience with the MIG tool? Is it user-friendly or
do you prefer to write your own DDR core?

thanks and best regards,
Karel