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CC2640R2F: How is it sate?

Lian Wu
Genius 5250 points
Part Number: CC2640R2F


Dears:

Could you kindly help to check the state of CC2640R2F?

1. From the below picture you can see if the voltage is drag so low(Red part 2), then CC2640R2F is in a unknown state, and it can not work normally.

The red part 1 detailed picture:

The red part 2 detailed picture:

The red part 3 detailed picture:

2. The current and voltage compared picture when not work well as below:

Pls. give some advice about it.

  • 0
    TI__Guru** 106705 points
    HI Lian,

    What is dragging the supply voltage down? If it is crossing the BOD limit (right below the lower operating voltage limit) the device will reset. What is the difference between the green trace and the yellow trace?

    Regards,
    Fredrik
  • 0 in reply to Fredrik K
    Genius 5250 points

    Hi Fredrik:
    The Green Trace is the Vdds of CC2640R2F, and the yellow trace is the Input power.
    And the supply voltage is dragged down because of big current(about 17mA under some operations.)

    You can see the first picture the lowest voltage is 1.877v and is not below 1.78V. I think CC2640R2F is not under BOD limit.

    Pls. kindly help to give some advice.

  • 0 in reply to Lian Wu
    TI__Guru** 106705 points
    How low is the dip in detail 2?

    What exactly happens in section 3?

    Could you also measure the VDDR voltage when this happens?
  • 0 in reply to Fredrik K
    Genius 5250 points

    Hi Fredrik:
    Pls. refer the below information:
    How low is the dip in detail 2?
    Luck: 1.877V.


    What exactly happens in section 3?
    Luck: There will be a pules current, and the voltage is changed puled voltage.


    Could you also measure the VDDR voltage when this happens?
    Pls. refer the below picture and you can see the trace2 is VDDR's waveform.

    The lowest value of VDDR is 1.5v.

    Btw, trace1 is input voltage(2.4V).

  • 0 in reply to Lian Wu
    TI__Guru**** 317180 points
    The pictures are lacking a marker that shows the voltage levels you are stating. Is it possible to upload the same plots but with a marker on the minimum? This case is also handled offline through Emma. Hopefully we will get some tags to measure on here.
  • 0 in reply to TER
    TI__Guru**** 317180 points
    Closing this case since I haven't gotten any feedback.