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Forum: FPGA, VHDL & Verilog how to read data from a ddr3 sdram?


how to read data from a ddr3 sdram?
von Hamid K. (Company: sharif) (hamidkavian)

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Hi
I want to read data from a ddr3 sdram. I'm using vivado. my memory model 
is
M471B2873FHS which is not mentioned in the "xilinx memory interface 
generator".
what should I do?
thanks.
( I apologize for my bad English ).

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Re: how to read data from a ddr3 sdram?
von P. K. (pek)

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You need a memory I/F within your FPGA. Unless you want to write it by 
yourself, you can use the memory I/F IP (MIG) from the IP Catalog.

As an intro, see:
https://www.youtube.com/watch?v=wqaGBvQwyRc

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Re: how to read data from a ddr3 sdram?
von MIGgi Mouse (Guest)

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Hamid K. wrote:
> Hi
> I want to read data from a ddr3 sdram. I'm using vivado. my memory model
> is
> M471B2873FHS which is not mentioned in the "xilinx memory interface
> generator".
> what should I do?
> thanks.

Hi Hamid,
Xilinx Memory Interface Generator simply initialize some Timing Values 
by selecting a Memoy in the generation process.

You should be able to compare the data from the datasheet with Micron 
Memories which should be avaiable and select the complementary part...

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Re: multi port access for ddr3 sdram?
von video constructor (Guest)

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I have a video board and need dual port access to a ddr sdram. I also 
launched MIG to obtain a DDR3 Controller for my given design. I have 
experience with DDR2 and DDR3 and am also familiar with the MIG. 
Surprisingly the MIG does not offer a multi port option anymore for 
current devices unlike it used to be before when I designed for spartan 
3 e.g.

Anybody can help with this issue? in the Xilinx Forum it is discussed to 
use a AXI based design or create a round robin controller myself.

anybody did this?

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Re: how to read data from a ddr3 sdram?
von BigChip (Guest)

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video constructor wrote:
> I have a video board and need dual port access to a ddr sdram. I also
> launched MIG to obtain a DDR3 Controller for my given design. I have
> experience with DDR2 and DDR3 and am also familiar with the MIG.

Hallo video constructor,
your problem is very different to the original Thread Opener.
Please don't capture this thread but open your own.

Regards

BigChip

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