+ Post New Thread
Results 1 to 5 of 5
  1. #1
    Advanced Member level 2
    Points: 3,910, Level: 14

    Join Date
    Apr 2011
    Posts
    540
    Helped
    24 / 24
    Points
    3,910
    Level
    14

    What determines the number of rows in an SDRAM?

    SDRAM is divided into banks, each bank into rows and each row into columns. What determines how many rows will be there in an SDRAM?
    Is there a formula used to go from a single memory location address to generate three addresses of bank, row and column?

    •   Alt5th January 2018, 10:57

      advertising

        
       

  2. #2
    Super Moderator
    Points: 241,738, Level: 100
    Awards:
    1st Helpful Member

    Join Date
    Jan 2008
    Location
    Bochum, Germany
    Posts
    41,977
    Helped
    12769 / 12769
    Points
    241,738
    Level
    100

    Re: What determines the number of rows in an SDRAM?

    What determines how many rows will be there in an SDRAM?
    The DRAM chip internal organisation. Review the datasheet.


    1 members found this post helpful.

    •   Alt5th January 2018, 12:35

      advertising

        
       

  3. #3
    Advanced Member level 2
    Points: 3,910, Level: 14

    Join Date
    Apr 2011
    Posts
    540
    Helped
    24 / 24
    Points
    3,910
    Level
    14

    Re: What determines the number of rows in an SDRAM?

    So it is an arbitrary choice of the SDRAM designers? I see.



    •   Alt5th January 2018, 16:58

      advertising

        
       

  4. #4
    Full Member level 1
    Points: 781, Level: 6

    Join Date
    Aug 2016
    Location
    Bangalore, India
    Posts
    98
    Helped
    12 / 12
    Points
    781
    Level
    6

    Re: What determines the number of rows in an SDRAM?

    But if you can access memory locations using linear addressing, then internal organisation may not matter for your application.



  5. #5
    Advanced Member level 5
    Points: 35,892, Level: 46
    Achievements:
    7 years registered

    Join Date
    Jun 2010
    Posts
    6,567
    Helped
    1914 / 1914
    Points
    35,892
    Level
    46

    Re: What determines the number of rows in an SDRAM?

    Quote Originally Posted by mjuneja View Post
    But if you can access memory locations using linear addressing, then internal organisation may not matter for your application.
    It can be very important. DRAM can be very slow when switching from row to row. But reading across banks and within a row incurs little/no turnaround penalty. So if you can, it is best to design your logic with this knowledge.



--[[ ]]--