DDR SDRAM simulation model, ML300, Infineon

Hello all,

I m working on an application using DDR SDRAM and i want to simulate
(timing simulation) the DDR SDRAM working along with the module i have
created.  the DDR SDRAM which is implemented on my board (ML300) is
Infineon HYB25D256800AT-7. it is implemented as 4 discrete parts each
256Mbit as 8bits*32million = 32MB thus totalling 4*32MB= 128MB. if
someone has the model/know a place where i can download VHDL/Verilog
simulation model of the above part that will be very useful for my
project.

Also i have a similar DDR SDRAM simulation model. this part is
manufactured by Micron MT46V32M8TG-75 and similar 256Mb 8bits*32mil =
32 MB. is it advisable to use this simulation model in the place of
the infineon? the DQ, DQS, DM, ADDR, col are all same for the two.

any help in this regard will be very useful.

with warm regards,
Chakra.

Also i will be using model sim for simulation.

regards,
Chakra.

chakra wrote:
> Also i have a similar DDR SDRAM simulation model. this part is
> manufactured by Micron MT46V32M8TG-75 and similar 256Mb 8bits*32mil =
> 32 MB. is it advisable to use this simulation model in the place of
> the infineon? the DQ, DQS, DM, ADDR, col are all same for the two.
The basic behaviour of DRAM is specified in a JEDEC-standard, so
theoretically all the chips, regardless of manufacturer, should behave
the same (as long as they have the same size, speed grade and so on).

So yes, you can use the Micron model for your simulations. Micron's
models are the best anyway, very detailed, very verbose and available as
Veerilog source. Samsung only offers precompiled models, I haven't used
those so can't comment on how how they are.

HTH,
Sean

-- 
My email address is only valid until the end of the month.
Try figuring out what the address is going to be after that...

On Jul 9, 8:03 pm, chakra <narashim...@gmail.com> wrote:
> Hello all,
>
> I m working on an application using DDR SDRAM and i want to simulate
> (timing simulation) the DDR SDRAM working along with the module i have
> created.  the DDR SDRAM which is implemented on my board (ML300) is
> Infineon HYB25D256800AT-7. it is implemented as 4 discrete parts each
> 256Mbit as 8bits*32million = 32MB thus totalling 4*32MB= 128MB. if
> someone has the model/know a place where i can download VHDL/Verilog
> simulation model of the above part that will be very useful for my
> project.
>
> Also i have a similar DDR SDRAM simulation model. this part is
> manufactured by Micron MT46V32M8TG-75 and similar 256Mb 8bits*32mil =
> 32 MB. is it advisable to use this simulation model in the place of
> the infineon? the DQ, DQS, DM, ADDR, col are all same for the two.
>
> any help in this regard will be very useful.
>
> with warm regards,
> Chakra.

You can get simulation models from http://www.qimonda.com (a spin-off
of Infineon).

Cheers,
Jim
http://home.comcast.net/~jimwu88/tools/

Thanks all for ur valubel information.

regards,
Chakra.

On Jul 10, 6:27 am, Jim Wu <jimwu88NOOOS...@yahoo.com> wrote:
> On Jul 9, 8:03 pm, chakra <narashim...@gmail.com> wrote:
>
>
>
>
>
> > Hello all,
>
> > I m working on an application using DDR SDRAM and i want to simulate
> > (timing simulation) the DDR SDRAM working along with the module i have
> > created.  the DDR SDRAM which is implemented on my board (ML300) is
> > Infineon HYB25D256800AT-7. it is implemented as 4 discrete parts each
> > 256Mbit as 8bits*32million = 32MB thus totalling 4*32MB= 128MB. if
> > someone has the model/know a place where i can download VHDL/Verilog
> > simulation model of the above part that will be very useful for my
> > project.
>
> > Also i have a similar DDR SDRAM simulation model. this part is
> > manufactured by Micron MT46V32M8TG-75 and similar 256Mb 8bits*32mil =
> > 32 MB. is it advisable to use this simulation model in the place of
> > the infineon? the DQ, DQS, DM, ADDR, col are all same for the two.
>
> > any help in this regard will be very useful.
>
> > with warm regards,
> > Chakra.
>
> You can get simulation models fromhttp://www.qimonda.com(a spin-off
> of Infineon).
>
> Cheers,
> Jimhttp://home.comcast.net/~jimwu88/tools/- Hide quoted text -
>
> - Show quoted text -

chakra wrote:
> Hello all,
> 
> I m working on an application using DDR SDRAM and i want to simulate
> (timing simulation) the DDR SDRAM working along with the module i have
> created.  the DDR SDRAM which is implemented on my board (ML300) is
> Infineon HYB25D256800AT-7. it is implemented as 4 discrete parts each
> 256Mbit as 8bits*32million = 32MB thus totalling 4*32MB= 128MB. if
> someone has the model/know a place where i can download VHDL/Verilog
> simulation model of the above part that will be very useful for my
> project.
> 
> Also i have a similar DDR SDRAM simulation model. this part is
> manufactured by Micron MT46V32M8TG-75 and similar 256Mb 8bits*32mil =
> 32 MB. is it advisable to use this simulation model in the place of
> the infineon? the DQ, DQS, DM, ADDR, col are all same for the two.
> 
> any help in this regard will be very useful.
> 
> with warm regards,
> Chakra.
> 
I recommend the Micron model.  It is very detailed, albeit not terribly 
fast.  I should point out that some of the specs between the Infineon 
and the Micron parts are slightly different.  This caused me a problem 
once.  My memory controller was designed for a board that could use 
either part interchangeably and I used the smaller setup time in my 
design which caused it to fail for the other brand.  -Kevin

Hello,

I am using the Micron model in my simulations. See my blog:
http://www.fpgafromscratch.com (part 20).

Sven