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  • Case ID: 357113
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NRF52840 DK - Programming external custom board at 3.3V

bpolito8

Hi,

I’m looking to program an external device that runs on 3.3V with my NRF52840 DK (v3.0.1), and I’m looking to verify that this is possible. I know that the DK runs at 3.0V.

If I would like to achieve this through the P19/Debug OUT Connector, should I bridge SB19 and leave SB47 open? I am planning to power the device separately from the DK. Please let me know if I am on the right track with this approach, thank you!

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    Hello,

    It is possible to use the DK to program an external hardware.. But they should operate at the same voltage during programming. 3V and 3.3V doesn't have that much of a difference, so it might work, but it is always recommended to power both the devices similarly to eliminate possible errors. Also note that they should have the same ground reference. The best approach is to use a level shifter in your circuit to adjust the voltage of the custom board to match that of the DK.

    Regards,

    Swathy

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  • 0

    Hello,

    It is possible to use the DK to program an external hardware.. But they should operate at the same voltage during programming. 3V and 3.3V doesn't have that much of a difference, so it might work, but it is always recommended to power both the devices similarly to eliminate possible errors. Also note that they should have the same ground reference. The best approach is to use a level shifter in your circuit to adjust the voltage of the custom board to match that of the DK.

    Regards,

    Swathy

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