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TGao's avatar
TGao
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

DDR3L address overflow

Dear Sir/Madam,

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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

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3 Replies

  • TGao's avatar
    TGao
    Icon for Occasional Contributor rankOccasional Contributor
    6 years ago

    Sorry, some wrong pictures just now

  • NurAida_A_Intel's avatar
    NurAida_A_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    6 years ago

    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's avatar
      TGao
      Icon for Occasional Contributor rankOccasional Contributor
      6 years ago
      Hi NuraidaA， Noted，It’s helpful，Thanks Ted.Gao