IWR6843: Board not working: DS1(nReset), D8(NRST) and D9(Power) always off.

Quentin BAJOT

Part Number: IWR6843
Other Parts Discussed in Thread: UNIFLASH, , MMWAVEICBOOST

Hello,

UniFlash isn't working with my IWR6843 . An error with COM ports is shown, despite my computer sees the board connected.

Looking at "MMWAVEICBOOST and antenna module user's guide" I've seen that the LED D9 should be on when my USB is plugded in but it's off on my board. Also, the two LEDs D1 and D8 are always off even when I press SW2(NRST).

Do you know how I can fix this issue and use again my board ?

Thanks a lot,

Best Regards

Quentin BAJOT.

over 6 years ago

0 Akash Gondalia over 6 years ago

TI__Guru 50240 points

Hi Quentin,

Would you be able to post a picture of your powered board and full screenshot of your Uniflash terminal when this error occurs?

Cheers,
Akash

0 Quentin BAJOT over 6 years ago in reply to Akash Gondalia

Intellectual 480 points

Sure, here it is !

0 Charles Oladimeji over 6 years ago in reply to Quentin BAJOT

TI__Mastermind 33805 points

Hi,

Seems like the board is constantly held in reset.
What is the specs of the power adapter?

Regards,
Charles O

0 Quentin BAJOT over 6 years ago in reply to Charles Oladimeji

Intellectual 480 points

Hi Charles,

Here is a picture of the specs of my power adapter :

Have a nice day,

Quentin

0 Akash Gondalia over 6 years ago in reply to Quentin BAJOT

TI__Guru 50240 points

Hi Quentin,

The required power supply is 5V, >3A. Is it possible to try with a different supply?

Cheers,
Akash

0 Quentin BAJOT over 6 years ago in reply to Akash Gondalia

Intellectual 480 points

Hi Akash,
I tried using an other power supply but ,unfortunately, nothing changed.

Regards,
Quentin

0 Akash Gondalia over 6 years ago in reply to Quentin BAJOT

TI__Guru 50240 points

Hi Quentin,

It appears your board is being held in reset for some reason. Do you have a seperate mmWaveICBOOST that you can try?

Is it possible to probe the voltage of the nRST line?

Cheers,
Akash

0 Akash Gondalia over 6 years ago in reply to Akash Gondalia

TI__Guru 50240 points

Hi Quentin,

Since we haven't heard from you I'm going to close this thread. If you still have questions feel free to post here or open up a new thread!

Cheers,
Akash

0 Quentin BAJOT over 6 years ago in reply to Akash Gondalia

Intellectual 480 points

Hi Akash,
Sorry for the delay ! I have an other mmWaveICBOOST and it works very well with my antenna.
Where can I probe the voltage of the nRST line on the mmWaveICBOOST ?

Thanks for your help,
Best regards !
Quentin

0 Akash Gondalia over 6 years ago in reply to Quentin BAJOT

TI__Guru 50240 points

Hi Quentin,

It is on the J6 connector, pin 10. It corresponds to R78.

You can also see the mmWaveICBOOST schematic on page 8 for reference, www.ti.com/.../swrr164

Cheers,
Akash

0 Quentin BAJOT over 6 years ago in reply to Akash Gondalia

Intellectual 480 points

Hi Akash,
The voltage at the Pin 10 is around 60mV.

Regards,
Quentin.

0 Akash Gondalia over 6 years ago in reply to Quentin BAJOT

TI__Guru 50240 points

Hi Quentin,

It appears your board is held in Reset and should be replaced.

Cheers,
Akash

0 Quentin BAJOT over 6 years ago in reply to Akash Gondalia

Intellectual 480 points

Hi Akash,
Thanks for your help, hopefully I have an other board to work with !

Regards,
Quentin.

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IWR6843: Board not working: DS1(nReset), D8(NRST) and D9(Power) always off.