• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 62 subscribers
  • Views 395 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

About PMBus commands of TPS53915

tsuyoshi tokumoto
Expert 2630 points
Other Parts Discussed in Thread: TPS53915

Hi all,

I have three questions about TPS53915.

 
(1)My understanding of the power up sequence of TPS53915 is as follows.
    If the power supply(VIN) of TPS53915 is turned on without sending any PMBus commands,
    the entire contents of NVMs will be stored to the operating memories,
    and TPS53915 will work with the stored memories(the operating memories).

   Is my understanding correct?
   Or, is the RESTORE_DEFAULT_ALL command needed?


(2)I understand that the values written on NVMs at the time of shipment are the values described
    on the data sheet(described as TI default).

     for example)

          
   Is my understanding correct?


(3)If the PMBus commands are not used,can SDA pin and SCL pin be left floating?
 

Best regards.
Tsuyoshi Tokumoto

  • 0
    TI__Intellectual 970 points
    hi Tokumoto,
    1-Yes your understanding is correct.
    Only RESTORE_DEFAULT_ALL command needed if you want to load the stored configuration that was stored in NVM into the operational memory.
    2- I can't see your example, but the datasheet should be similar to TI default.
    3-yes, you can leave the PMbus pins open.
  • 0 in reply to Benyam
    Expert 2630 points

    Hello Benjamin1-san,

    Thank you very much for your reply.

    I'm sorry, I tried to attach the extract of the data sheet,
    but I wasn't able to attach it for question 2 well.

    Please let me ask you just one more question to be sure.

    "The values written on NVMs at the time of shipment are the same as TI default
     values described on the data sheet(SLUSAS9B NOVEMBER 2013REVISED DECEMBER 2014)."

    Is my understanding correct?

    Best regards.
    Tsuyoshi Tokumoto

  • 0 in reply to tsuyoshi tokumoto
    TI__Intellectual 970 points
    hello Tsuyoshi-san,

    yes, it should be the same as TI default, but to be 100% sure. I would recommend to verify that if you have EVM board and GUI.
  • 0 in reply to Benyam
    Expert 2630 points

    Hello Benjamin1-san,

    　Thank you very much for your prompt reply and advice.

      I understand it well.

    Best regards.

    Tsuyoshi Tokumoto