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Softdevice example doesn't start when powered by other source than MCU interface.

Francois5Co

Hi,

Recently I receive the "nRF52840-Preview-DK" and I download the "nRF5 SDK v14.0.0". I try some example with Keil and all of them works well when I use the MCU interface. But when I try to powered the board with other source than the MCU interface only examples that do not include softdevice works. Examples with softdevice seems to doesn't start. I have the same problem if I copy directly the hex file on the JLink storage manager.

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    I have try with a lithium coin cell but it doesn't work too. I also try to move SW9 to USB but it doesn't work too. If you see the schematic of the nRF52840-Preview-DK and you select VDD to nRF power source you can see that the power supply is the same across the board when powered by J3 or J2 the only difference is USB detection is not done by the PCA10056 if you powered by J3 (nRF USB).

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    I have try with a lithium coin cell but it doesn't work too. I also try to move SW9 to USB but it doesn't work too. If you see the schematic of the nRF52840-Preview-DK and you select VDD to nRF power source you can see that the power supply is the same across the board when powered by J3 or J2 the only difference is USB detection is not done by the PCA10056 if you powered by J3 (nRF USB).

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