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rfern33's avatar
rfern33
Icon for New Contributor rankNew Contributor
6 years ago

Cyclone V Errata: False Configuration Failure in Active Serial Multi-Device Configuration x1 Mode

Hi,

I have a few 5CEFA2F23C8s some of which require me to perform the "False Configuration Failure in Active Serial Multi-Device Configuration x1 Mode" workaround as per "Cyclone V GX, GT, and E Device Errata" while some of the FPGAs do not. It is possible the ones that do not require this are from an older batch.

I would like to know why some of the FPGAs require us to perform this workflow. Is there a batch(es) that we could buy to avoid us from having to do this workaround?

See the attached screenshot for the workaround. Link to the errata can be found below:

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/es/es_cyclone_v.pdf

Support Ticket - 04464979

5 Replies

  • YuanLi_S_Intel's avatar
    YuanLi_S_Intel
    Icon for Regular Contributor rankRegular Contributor
    6 years ago

    Hi Reuben,

    This is only happening when the FPGA is using AS x1 Mode. Apologize that all the batches are affected by this. Thus there is no way to avoid from this.

    Thank You.

  • YuanLi_S_Intel's avatar
    YuanLi_S_Intel
    Icon for Regular Contributor rankRegular Contributor
    5 years ago

    I dont understand. The CRC will be implemented by default during device programming. Thus, we no need to run that. It will be ran by default.

    • rfern33's avatar
      rfern33
      Icon for New Contributor rankNew Contributor
      5 years ago

      Right. Do you know if this CRC is performed when we program the Configuration IC (EPCQ16A) or when the FPGA enters User Mode?

      I am trying to ensure that disabling the CONF_DONE error checking flag does not compromise any security measures.

  • YuanLi_S_Intel's avatar
    YuanLi_S_Intel
    Icon for Regular Contributor rankRegular Contributor
    5 years ago

    No sir, this CRC runs during configuration phase only. It is not advised to diable the CONF_DONE flag as it is needed during configuration.