Forum Discussion

Asaf_Bloch's avatar
Asaf_Bloch
Icon for New Contributor rankNew Contributor
3 months ago
Solved

Cold Temperature Issue

Hallo, We used the Agilex5 device in AS configuration connect to external QSPI Flash. We apply Smart VID interface at the device demands.  When we perform Cold power up at -40C the device is not c...
Configuration
Programmable Logic Device
  • Farabi_Altera's avatar
    Farabi_Altera
    2 months ago

    Hi Asaf, 

     

    Good to hear that you solved the issue. Yes, all the configuration signals are sensitive can't let the voltage drop even few microseconds. 

Asaf_Bloch's avatar
Asaf_Bloch
Icon for New Contributor rankNew Contributor
2 months ago

Hello Farabi,

The 3.3V ramping because there are pull-up resistors connected to the system 3.3V, it is low voltage level,

Anyway I moved it and it did not change the cold issue.

 I notice the MSEL and nconfige signals are pull up and down during Vccio_SDM ramping, is it normal behavior? See attached

Thanks 

Asaf

  • Farabi_Altera's avatar
    Farabi_Altera
    Icon for Regular Contributor rankRegular Contributor
    2 months ago

    HI Asaf, 

     

    No that is not normal. MSEL is a fixed connection either HIGH or LOW only. It should not toggle during configuration. 

    Please connect MSEL pin directly to VCC for HIGH, and directly to GND for LOW setup. Dont control the MSEL. 

     

    regards,

    Farabi

    • Asaf_Bloch's avatar
      Asaf_Bloch
      Icon for New Contributor rankNew Contributor
      2 months ago

      Thanks Farabi,

      The issue is after configuration I see the MSE2 is rising to 1.8V, seemed it by the FPAG, is it normal?

      Can it harm the pin?

      Thanks

      Asaf

       

      • Farabi_Altera's avatar
        Farabi_Altera
        Icon for Regular Contributor rankRegular Contributor
        2 months ago

        Hi Asaf, 

         

        Do you have further question? 

         

        regards,
        Farabi