where can i get memory model(verilog) ?

[xldu]

memory modelling verilog

hi, guys.
i am searching for a DDR SDRAM memory model which can support from 50M to
100M Hz clock. but i just find 100M, 133M and 266M.
is there any models which can satisfy my request?

 

[luancao]

Go to the idt the cypress web site. You could find one easily.

 

[jackson_peng]

if you just need verilog model (behavior model). you can write it your-self. or it is available at **broken link removed**. they provide VIP (Verificated IP).

 

[jimjim2k]

Hi

Use genmem23

tnx

 

[xldu]

thanks,
but i find the models of memory on synopsys website are all fixed frequencies.
now i have a model but can only work on 100MHz.
is there a model whose work frequency is not fixed?
-----------------------------------------
another question:
if i want to know the real size of memory on chip, where can i look for this information?

 

[tarkyss]

i think you can use the model of 100m or 133m, then modify it by youself according with specification

 

[gliss]

Micron also has memory models.
Can you take a fast model and clock it down in simulation?

 

[xldu]

to tarkyss:
do you think it is easy to modify the model?
what parameters shoule be modified if i don't have the specifications?

to gliss:
i have many difficulties in clocking it down in simulation, as the model is a ddr sdram, and can't find the documents refer to the model.

 

[luancao]

refer the IDT or Cypress datesheet or Micron ...

There are both timing diarams and verilog descriptions.

 

[gliss]

If you are willing to pay, you can get memory models from Denali.

 

[tarkyss]

what are easy?
you can download the model specification from foundry, i dont understand how can you design you controller if you have not the specification?

 

[bc70]

Take a look at the opencores.org website, it will at least give you a good starting point.

**broken link removed**

 

[jjww110]

you can download from xilinx websit

 

[firendchn]

you can go to micron or samsung website to download the models you need.