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UCD90SEQ64EVM-650: power sequence in fusion design online

Sunset
Genius 13995 points
Part Number: UCD90SEQ64EVM-650
Other Parts Discussed in Thread: UCD90124A, UCD90124

Hello Team,

For the power sequencing, I have started to work with UDC90124 in the UCD90SEQ64EVM. I have made a power sequence in fusion design online.

 I have some point and one question, 

  • It seems like, in the sequence  your ICs rails is looking for the parent Power Good but not looking parental Enable signal. (There might be safety issue for your IC)
  • I could understand and run the power sequence. I checked it on my scope also.
  • But whenever I click on the ``start polling`` in the fusion design online, to see the voltages in the graphical representation, SMBus alerts pulls low and all system gets low?

I did not understand why it is turning down? When I try to start polling.

Thanks,

SunSet

 

  • 0
    TI__Genius 9340 points

    Hi, Sunset,

    It seems your system has faults causing SMBALERT to be low. Check the Voltage limits.

  • 0 in reply to Anne Ngo77
    TI__Genius 13995 points

    Hello Anne,

    thanks for the quick follow up.

    Some additional info.

    I started my sequence and I can say it is fine. and there is no alert or something. I can follow from the turn on leds and everything is fine.

    Whenever I try to connect in fusion designer to monitor to see Voltage with graphical view. Fusion design starts to load or read registers and that yields to the system down and  I started to get alert and everything shuts down.

    When I push the button stop pulling in software and reset my sequencer it does not give any alert or error. But whenever I push run pulling in software it starts to give error.

    I have already make some adjustments about undervoltage and overvoltage. I think they are fine.

    Thanks,

    Sunset

  • 0 in reply to Sunset
    TI__Guru 66380 points

    Hi 

    GUI 7.0 does not support UCD90124 since this device is too old to support by new GUI. Please use UCD90124A.

    Regards

    Yihe