NRF52H20 Connection issue

[Agalya Gowander]

Hello,

I have started working with the NRF52H20 by following the guidelines mentioned in the nRF Connect SDK Fundamentals course.

In Lesson1 Exercise2 I'm facing following issue 

I am using a B-type data cable to connect the NRF52H20 board to the laptop via the J2 pin. In the Visual Studio Code, it initially shows that no device is connected and the LED5 on the board blinks continuously for every 500ms(approximately). Occasionally, the device connects, and the PC notifies me of this. In Visual Studio Code, the connected device then shows up my board details and the LED5 stays in on state.

However, sometimes during the building or flashing process, the device disconnects, and the previous state (blinking LED5 with no device detected) occurs again. This pattern repeats, and I haven't been able to identify the actual cause. Due to this issue, I haven't been able to proceed further.

I am trying to use the following example code: the directory path is as follows:

• Create a new application.
• Copy a sample.
• Blink LED (PWM-based).

(1) Build configuration

(2) Device is connected

(3) In the below picture during the flash operation the device got disconnected

[Priyanka]

Hi,

Could you please specify which DK you are using? Is it the nRF52840DK? or is it the new nRF54H20? 

Regards,

Priyanka

[Agalya Gowander]

Hi Priyanka,

For both of them same issue has been observed. I need solution for both DK i.e., NR54H20DK and NR52H20DK.

Please let me know if any steps is need to be performed.

[Priyanka]

Agalya Gowander said:

NR52H20DK.

This is where I am confused. We do not have any nRF52H20DKs. Just the nRF54H20DK and the nRF52840DK. We also have the nRF52820 chip, but it does not have a specific DK.

Initially I wondered if this might be a typo, but since you are mentioning it again, I am a bit confused.

-Priyanka

[Agalya Gowander]

Hi Priyanka,

You were right it is a typo mistake, I have issues with nRF52840DK and nRF54H20DK. Let me know the procedure to be followed to connect the device with the PC

[Priyanka]

Since you experience the same issue with both the boards, the issue could be ether a faulty cable or some software installation problem. Please do try to use the boards with a different USB cable.
Also, what is you J-Link version?

Have you downloaded the latest nRF Command Line Tools?

Also, sometimes when it does not show up in VSCode, do you still see your device in you PC?

Regards,

Priyanka

[Agalya Gowander]

Hi Priyanka,

For nRF52840DK the issue is resolved. I'm able to connect and flash the code.

• The following are the changes that I have performed 

                 SW9 Pin - Set at VDD

                 SW10 Pin - Set as OFF

•  Please let me know the technical reason for above mentioned settings, as I'm not very sure about it.
• But I'm unable to resolve the issue for nRF54H20DK, please let me know
• Refer attached picture.

According to your previous reply

•  Faulty cable - Tried with other working cables and another PC
• J-Link version - V7.94e
• nRF Command Line Tools - nrf-command-line-tools-10.24.2-x64
• sometimes when it does not show up in VSCode, do you still see your device in you PC - NO

Hence, nRF54H20 is not connecting and nRF52840 is connected after performing few settings on hardware.

Thank you.

[Priyanka]

Hi,

Agalya Gowander said:

• The following are the changes that I have performed 

                 SW9 Pin - Set at VDD

                 SW10 Pin - Set as OFF

This is how it should be.

Agalya Gowander said:

Refer attached picture.

Is this picture when the nRF54H20 is connected?

Is it shown in the Connected Devices then?

Could you show me what the 5 problems are in the problems window?

-Priyanka

[Agalya Gowander]

The attached picture is of nRF52840DK now I'm able to connect and flash the code.

For the nRF54H20DK, no device details are found even when the device is connected. Give a solution for it.