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TVP5150AM1: Powerdown Mode wait time sequence

Sho Ikeno
Prodigy 410 points
Part Number: TVP5150AM1

Tool/software:

I have got a question from customer regarding to TVP5150AM1’s PowerDown sequence .

In the document of “tvp5150am1_PowerDownMode.pdf”it is said that the I2C has double the wait time, does this mean that the wait time before the stop condition needs to be 128us? were it is written 64us in 3.15.2.3 Timing Requirement.

 

Regards,

https://www.ti.com/lit/an/slea108/slea108.pdf?ts=1717666969963&ref_url=https%253A%252F%252Fwww.google.com%252F

  • 0
    TI__Guru**** 190876 points
    Sho Ikeno said:
    In the document of “tvp5150am1_PowerDownMode.pdf”it is said that the I2C has double the wait time, does this mean that the wait time before the stop condition needs to be 128us? were it is written 64us in 3.15.2.3 Timing Requirement.

    Hi Sho-san,

      That is also my understanding. Wait >128uS before issuing STOP bit. 

  • 0 in reply to Charles Tsai
    TI__Prodigy 410 points

    understood,

    one more question, to enter the powerdown mode there are 9 steps. we sometimes see an error operating this in order but no error when starting with #9 > #1 > #2...> #8. is there any concerns not following the steps in order?

    or does this have anything to do with the waiting time related with the first question?

    regards,

  • 0 in reply to Sho Ikeno
    TI__Guru**** 190876 points

    Hi Sho-san,

    Sho Ikeno said:
    one more question, to enter the powerdown mode there are 9 steps. we sometimes see an error operating this in order but no error when starting with #9 > #1 > #2...> #8. is there any concerns not following the steps in order?

    I will suggest you follow the instructions as listed in the document. Your proposed order to start step 9 first has never been tested so I don't know if that will also work.

      As much as I want to assist, I have no experience with this device. Please note that we no longer offer any support for this device on the E2E forum. You may search the E2E forum for archived posts of previous discussions which may help address your questions. Sorry for lack of guidance.