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Altera_Forum's avatar
Altera_Forum
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13 years ago

DDR2 RAM with ALTMEMPHY Conroller ?

Hi all,

I am trying to initialise my DDR2 ram(MT47H128M16RT-25E) in a custom designed board with a cyclone iv FPGA().

I am using ALTMEMPHY controller to connect to the external DDR2 SDRAM but it is not working.

I have uploaded my project file.

Help me with this

Regards,

Iyan

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    Hi,

    Have you had a look through this document:

    http://www.altera.com/literature/hb/external-memory/emi_altmemphy_ref_debug_toolkit.pdf

    Lots of useful suggestions there. When I had a similar problem I built a stripped down design around the example design produced by the DDR2 megafunction and turned on the debug. Included the JTAG interface and then I could see at what stage it fell over during PHY initialization and calibration. Very useful. Is the board custom or one of the development kits. If custom, are you sure you have a termination correct?

    Mark.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    Hi Mark,

    I am looking into the documentation.

    My board's RAM design is similar to Altera's Cyclone iv development Kit.

    Regards,

    Iyan