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Asaf_Bloch's avatar
Asaf_Bloch
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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
3 months ago

Hello Farabi,

1 - QSPI Flash -  MT25QU256ABA8E12-1SIT by Micron

2 - VR - LT7184SRV#TRPBF by Analog Device

3 - Agilex5 - A5EC043AB23AI2E

Thanks

Asaf

 

Farabi_Altera's avatar
Farabi_Altera
Icon for Regular Contributor rankRegular Contributor
3 months ago

Hello Asaf, 

 

If the device is not output from POR, do you have the oscilloscope capture the power rails ramping up? 

Any abnormal voltage ramp up during power up? Especially all the power rails monitored by POR circuitry. 

 

regards,

Farabi

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

    Hello Farabi,

    Thanks for your reply,

    We checked Cold start up on other PCB and it pass successfully, so maybe it is assembly issue of specific PCB, we send it for examination and preheat of the FPGA and we will check it again.

    See attached oscilloscope capture:

    1. Green - PMBus (3.3V), Red -VID voltage, Blue - 1.8V, Yellow - nConfig - it good power up, you can see transition on the PMBus.
    2.  Red - VID, Yellow - nConfig, Green - SDM clock, Blue - Nstatus.

     

    I don't see the SDM start the configuration prosses

    Regards

    Asaf