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nRF 52840DK debug out on board version 3.0.0 not working

hector77

Hi there, 

We have recently purchase some more nrf52840DK to develop and program custom boards based on the same SoC. The new DK (from Digikey) have the following sticker
PCA10056
3.0.0
2022.20

When we use them to program other nRF52840 SoC, it looks like the external board is not recognized.

With some other earlier version of the nrf52840DK (2.0.2, 2021.43) everything was working fine. Could you please help us understanding what possible issues might be at stake ?

More info: I have also tried to pull down the GND Detect as mentioned here:  Using Debug Out (p19) to program 3rd Party nrf52840/nrf52810 boards with issues , but when looking at the DK 3.0.0, on Debug Out P20 connector, it looks like the GND Detect pin is no longer present (at leas the label is not). 

Many thanks for your help.

Best regards, 

H

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    I'm having the similar issue.

    I'm using nRF52840DK (PCA10056 3.0.0 2023.3) and XIAO nRF52840 Sense with Expansion Board as target.

    On the expansion board I use first column pins (SWCLK, SWDIO, 3V3, GND) that are connected to the P20 on DK (SWDCLK, SWDIO, VDD nRF, P1.GND). 

    When I switch DK to ON position, XIAO and Expansion board are powering up. I'm using VSCode and I see only DK board and during flash DK board is getting flashed. 

    What am I doing wrong?

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  • 0

    I'm having the similar issue.

    I'm using nRF52840DK (PCA10056 3.0.0 2023.3) and XIAO nRF52840 Sense with Expansion Board as target.

    On the expansion board I use first column pins (SWCLK, SWDIO, 3V3, GND) that are connected to the P20 on DK (SWDCLK, SWDIO, VDD nRF, P1.GND). 

    When I switch DK to ON position, XIAO and Expansion board are powering up. I'm using VSCode and I see only DK board and during flash DK board is getting flashed. 

    What am I doing wrong?

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