• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 99 subscribers
  • Views 490 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TDA4VMXEVM: How to measure the C71x power consumption during a benchmark?

Francois Charlot
Mastermind 28257 points

Part Number: TDA4VMXEVM

Hello,

As the title says... Is the TDA4 EVM instrumented so one could measure the C71x power consumption at device level when running a benchmark? Thank you.


Best regards,
François.

  • 0
    TI__Expert 8165 points

    Hi Francois,

    I will get back to you after checking with an expert. I have my doubts on if the EVM comes with all the instrumentation needed for this, or if you need some daughter cards or other setup for this. I will clarify and get back to you soon.

  • 0
    TI__Expert 8165 points

    Hi Francois, 

    I doubt if that kind of instrumentation is present on the EVM as such, or you need to attach some daughter cards or something of that sort. I can confirm with a C7x expert and get back to you on this. 

  • 0 in reply to Anand Mahadevan SS
    TI__Mastermind 28257 points

    Hello Anand,

    I believe that the TDA4 EVM is instrumented to allow for voltage and current measurement since its user's guide, section 4.5.3.3, refers to on-board INA226 sensors.

    Where I am struggling with is which I2C address to use for the C71x DSP, because table 5-1905 in the TDA4VM TRM refers to the PD_C71x power domains belong to the VD_CC voltage domain, but this name is not related to any name in the datasheet or the EVM schematic. What I see in table 5-1905 is a supply net name VDD_CPU_AVS which corresponds to VDD_CORE balls on the schematic, but I am unsure whether these balls power the C71 DSP or just the Arm Cortex A72 cores. Could you please clarify which I2C address I should read for C71?

    Also, it would be nice that the EVM UG gives an example of I2C dump command line and output to illustrate what dumping the voltage and current looks like. Thank you.


    Best regards,
    François.

  • 0 in reply to Francois Charlot
    TI__Expert 8165 points

    Hi Francois,

    I'll ping a board expert to look into this ASAP.

  • 0 in reply to Anand Mahadevan SS
    TI__Intellectual 1160 points

    Hi Francois,

    You need to use I2C address connected to VDD_CPU_AVS for measuring C71x CPU power consumption. There is no dedicated power source for C71x. Both MPU and C71x share the same domain.  

    - Pratap.