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SLabe's avatar
SLabe
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5 years ago

How to manually trigger or inhibit periodic OCT updates in Arria 10

As mentioned in A10 EMIF UG, looking for information on the following statement: "Contact Intel FPGA Technical Services for information on how to manually trigger or inhibit periodic OCT updates fo...
yoichiK_altera's avatar
yoichiK_altera
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5 years ago

Hi

You can change the periodic OCT option in the EMIF IP GUI parameter. 

  • SLabe's avatar
    SLabe
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    Hi, the GUI only lets permanently enable or disable Periodic OCT Calibration. What we need is the ability to selectively block it during critical data transfers and then re-enable it the rest of the time to compensate for temperature cycling, etc ...

    According to 3.4.3: https://www.intel.com/content/www/us/en/programmable/documentation/eqw1503946000045.html#mhi1460567996227 there is a way to do this, but requires your support. My local Intel resource indicated some lower level code may need changing to expose the appropriate controls.

    Thank you,

    • yoichiK_altera's avatar
      yoichiK_altera
      Icon for Contributor rankContributor
      5 years ago

      Hi

      There is file to control the periodic OCT update and you can tweak the oct_recal_req signal in the file to enable or disable the periodic OCT.

      ip/ed_synth/ed_synth_emif_0/altera_emif_arch_nf_191/synth/altera_emif_arch_nf_oct.sv