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Asaf_Bloch's avatar
Asaf_Bloch
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1 month ago

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
Asaf_Bloch's avatar
Asaf_Bloch
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1 month 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
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1 month 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
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    1 month 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