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Altera_Forum's avatar
Altera_Forum
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17 years ago

DDR3 Write Leveling

If I have "Quick Calibration" selected when I create an instance of the DDR3 HP Controller with Quartus 8.0, should I expect to see it go into write-leveling mode when I sim it in Modelsim? Everything I'm using was created by the megawizard tool (example_tb, example_driver, altera's DDR3 sim, etc.). When I kick off the sim, it writes to the mode registers to set up the DDR3 DIMM, but I never see it write to them again to start write leveling (setting bit 7 in MR1). Is this something that should only happen if full calibration is selected?

2 Replies

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

    Only with full calibration selection, you can observe the write leveling operation.

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

    But the full calibration mode can not be done with memory model provided by altera, correct? Does this mean I can only do it with a manufacturer-provided model? Thanks for the feedback.