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AM62A7-Q1: Questions: Power supply and eval board

Daniel Hedtheyer
Prodigy 40 points
Part Number: AM62A7-Q1
Other Parts Discussed in Thread: AM62A7, AM62A3

Tool/software:

Hey there,

I have two questions regarding the power supply and the design of the eval board (AM62A7 / AM62A3 LOW POWER STARTER KIT SK (EVM)
WITH TPS65931211-Q1 PMIC).

  1. Is it mandatory to connect VDDSHV5 to a supply voltage or can it be left floating if IO group 5 is not used?
  2. The schematic of the eval board in pdf file "PROC135A" shows a level translator between AM62A and PMIC (page 33). Why is it used? Datasheet of TPS6593 reads that VIL(DIG) is 0.54 V and VIH(DIG) is 1.26 V for the used IO pin. This should be fine with 1.8 V output of AM62A on "MCU_ERRORn". Do you have further information on this and a recommendation?

Thank you in advance.

Best regards,
Daniel

  • 0
    TI__Guru* 90255 points

    Hello Daniel,

    I have assigned your thread to one of our team members. Please note that this is a holiday week in India. Feel free to ping the thread next week if you do not get a response within a few business days.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    TI__Guru**** 162349 points

    Hello Daniel

    Daniel Hedtheyer said:
    Is it mandatory to connect VDDSHV5 to a supply voltage or can it be left floating if IO group 5 is not used?

    The recommendation is to connect a valid power supply to VDDSHV5.

    Daniel Hedtheyer said:
    The schematic of the eval board in pdf file "PROC135A" shows a level translator between AM62A and PMIC (page 33). Why is it used? Datasheet of TPS6593 reads that VIL(DIG) is 0.54 V and VIH(DIG) is 1.26 V for the used IO pin. This should be fine with 1.8 V output of AM62A on "MCU_ERRORn". Do you have further information on this and a recommendation?

    Are you checking if the level shifter can be removed?

    The SK is a generic design designed parallel to the SOC and PMIC design.

    Customer are allowed/encouraged to review and do the required optimization preferably after testing.

    Regards,

    Sreenivasa

  • 0 in reply to Kallikuppa Sreenivasa
    TI__Guru**** 162349 points

    Hello Daniel

    Please refer to the notes below the section referenced.

    Kallikuppa Sreenivasa said:
    Daniel Hedtheyer said:
    Is it mandatory to connect VDDSHV5 to a supply voltage or can it be left floating if IO group 5 is not used?

    The recommendation is to connect a valid power supply to VDDSHV5.

    5.4 Pin Connectivity Requirements

    Regards,

    Sreenivasa