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UCD90120A: UCD90120A

kamlesh yadav
Prodigy 70 points
Part Number: UCD90120A

Plz help.

Purpose of discussion is to program UCD90120A, thats
mounted on ZC706 Board:

(1)
USB-GPIO firmware 1.0.14 works, i understand no other
firmware version works for above board, comment on
this
If 1.0.13 is used then error voltage "Rail #1 does not
get powered up (thereby shutting all remaining 4 voltage
rails on the board).

(2)
On the above hardware with the same setup, USB-GPIO
firmware 1.0.14 is used asserts Enable signals Rail #1
& Rail #2, so Rail #1 powers up to 1V but Rail #2 does
not power up & remaining 3 power rails are in shutdown
mode.

Regards
Kamlesh.

  • 0
    TI__Guru 66310 points

    Hi Kamlesh

    Could you plese share the project file so that we can help further?

    Thanks

    Yihe

  • 0 in reply to yihe
    Prodigy 70 points

    Thanks for the reply Mr. Yihe, thank u.

    I am using the the circuit of Eval Board Zynq-7000 SoC ZC706 (revision 2).

    I am using following file to program the TI Power Sequencer UCD90120A, this file i found on Xilinx website.

    ZC706_REV2_0_TI_XML

    On the board as per the schematic, there are 5 Rails.

    Plz confirm whether above xml file will be ok for our board or we have to modify the file. if yes plz tell me what.

    again if u can send me the .xml file that u think will work for me, plz send (kamlesh324@yahoo.com)

    When i use Firmware version 1.0.13, Rail#1  is not up.

    When i use Firmware version 1.0.14 Rail#1 get powered up but Rail#2  & successive Rails r in shutdown.

    Plz suggest me what is the problem.

  • 0 in reply to kamlesh yadav
    Prodigy 70 points
    Dear Mr. Yihe,
    I am waiting for ur reply.

    Regards
    Kamlesh.
  • 0 in reply to kamlesh yadav
    TI__Guru 66310 points
    Since the file is released by the Xilinx, you have to contact them about the how to use the files on their Eval Board.
    If you want to isolate the issue, please order a UCD90120A EVM and sample to make experiments.
    Regards

    Yihe
  • 0 in reply to yihe
    Prodigy 70 points
    ok fine plz tell me the sequence of operation TI IC does for ZC706 board.

    whatever sequence (Enable is asserted, regulator Power is ON, Regulator O/P is fed back etc ), whatever sequence u understand, plz write that clearly here. I will do the debugging myself.

    Today on my board i observe, Rail#1 & Rail#2 are powered up, Enable for Rail#3 is now up so Rail#3 is in shutdown state.

    Regards
    Kamlesh.
  • 0 in reply to kamlesh yadav
    TI__Guru 66310 points
    In order to turn on the rail, there are many conditions ON_OFF_CONFIG, sequencing on dependencies, any fault which may shutdown the rail
    1. check the ON_OFF_CONFIg for the rails:
    A. if set to AUTO, the rail will be on automatically if its turn on dependecies met
    B. if set to CONTROL PIN, make sure that the control pin output matches the active polarity set
    C. if set to operation, 1) make sure that operation command is sent from host
    2. check the rail turn on dependencies to make sure that the dependeceis are all met
    3. to see whether there is any faults during the turnon which may shutdown the rails. check the log to see whether any fault is logged.

    Regards
    Yihe