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  • Case ID: 317914
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Issue programming custom nRF5340 board with nRF7002 development kit

shay_siah

Hello,

I am attempting to program a custom nRF5340-based board using the nRF7002 development kit, but the device won’t be recognized by nrfjprog, and the programming operation fails.

I followed the kit’s user guide to connect the custom board: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf7002_dk%2FUG%2Fnrf7002_DK%2Fext_programming_support_P20.html

The custom board is based on the reference circuit configuration 1 with the external 32.678 kHz Crystal installed: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf5340%2Fchapters%2Fref_circuitry.html&cp=4_0_0_8_2

I also tried connecting VDD_HV on the custom board to VBAT (P20) and VTG (P20) on the kit, but still had the same issue. Is what I am attempting possible, or is this most likely to be an issue with the custom board?

Thank you,

Shayan

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  • 0

    Hello Shayan, and sorry about the wait. 

    Unless you've made changes in the VREGH register, then yeah I guess you should still be able to program the custom board like this. 

    What is important is that the ground and voltage level (VDD) must be the same on the DK (used as programmer) and the target board (with the SoC to be programmed). For the nRF7002DK that is 1.8V. 

    Can you make sure that the board is getting power? 

    I'll have to get back to you on this next week.

    Regards,

    Elfving

  • 0 in reply to Elfving

    Hello Elfving,

    I can confirm that no changes have been made in the VREGH register, and that VDD measures 1.8V when powered by the DK (used as programmer).

    At this point, I am fairly certain that the issue is a bad connection between the SoC and the PCB. What method would you recommend for checking the solder connection of the 5340? We are using an aQFN package for the first time, and could use some guidance on working with it.

    Thank you,

    Shayan

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  • 0 in reply to Elfving

    Hello Elfving,

    I can confirm that no changes have been made in the VREGH register, and that VDD measures 1.8V when powered by the DK (used as programmer).

    At this point, I am fairly certain that the issue is a bad connection between the SoC and the PCB. What method would you recommend for checking the solder connection of the 5340? We are using an aQFN package for the first time, and could use some guidance on working with it.

    Thank you,

    Shayan

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