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TGao
Beginner
125 Views

DDR3L address overflow

Dear Sir/Madam,

It's DDR3L in 18.1 Pro (PN:10CX105YU484I5G), When I set the refclk 300M , the adress range is 0X0000 0000-0X00FF FFFF( Wrong, But no error in Qsys), and when I set the refclk 400M ,the range is 0X0000 0000-0X0FFF FFFF(correct , But has errors, Prompt DDR address overflow).

 

What I need is refclk 400M, Could you give me a favor ?

 

Ted.Gao

 

4.jpg3.jpg2.png1.jpg

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3 Replies
TGao
Beginner
69 Views

Sorry, some wrong pictures just now

 

微信图片_20200511113124.jpg

NurAida_A_Intel
Employee
69 Views

Hi Ted,

 

Welcome to Intel Community. 😊

 

I think this more related to the address wide from the master.

 

You can check out this link ( Post #4 --> https://forums.intel.com/s/question/0D50P00003yyNbBSAU/component-is-outside-masters-address-range ) which has a really good short explanation of addressing.  

 

As per suggested, you need a wider address bus on your master. Recommended to always use 32-bit address buses on masters to overcome the issue.

 

Hope this helps.

 

Thanks

 

Regards,

Aida

 

TGao
Beginner
69 Views

Hi NuraidaA, Noted,It’s helpful,Thanks Ted.Gao
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