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Explorer
Explorer
347 Views
Registered: ‎10-16-2018

When to use DDR3 SDRAM ?

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Hi @avrumw ,  Hi All,

I want to know when to use DDR3 SDRAM (MIG) in a design? 

Also, if Microbalze alreay is containing a RAM memory why some designs are implementing DDR3 SDRAM? 

Kindly , see the attached pictures.

Thanks.

Microblaze RAM memoery.JPG
MIG.JPG
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1 Solution

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Scholar dpaul24
Scholar
337 Views
Registered: ‎08-07-2014

Re: When to use DDR3 SDRAM ?

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@ahmed_alfadhel,

Also, if Microbalze alreay is containing a RAM memory why some designs are implementing DDR3 SDRAM?

They are two different things.

When you have a great volume of data to be handled such that most of the FPGA BRAMs are used up or all of the BRAMs available are not enough, then it makes sense to store the data in an external DDR* RAM memory.

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FPGA enthusiast!
All PMs will be ignored
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2 Replies
Scholar dpaul24
Scholar
338 Views
Registered: ‎08-07-2014

Re: When to use DDR3 SDRAM ?

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@ahmed_alfadhel,

Also, if Microbalze alreay is containing a RAM memory why some designs are implementing DDR3 SDRAM?

They are two different things.

When you have a great volume of data to be handled such that most of the FPGA BRAMs are used up or all of the BRAMs available are not enough, then it makes sense to store the data in an external DDR* RAM memory.

--------------------------------------------------------------------------------------------------------
FPGA enthusiast!
All PMs will be ignored
--------------------------------------------------------------------------------------------------------
Xilinx Employee
Xilinx Employee
291 Views
Registered: ‎08-21-2007

Re: When to use DDR3 SDRAM ?

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Yes, the DDR3 is for large data storing which need to be a controller implemented. The BRAM is for a few data which has the simple address/data interface.