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.

[Francois5Co]

For example, I connect the demo board with a USB cable to the MCU Interface (J2), I copy this hex file "nRF5_SDK_14.0.0_3bcc1f7/examples/peripheral/blinky/hex/blinky_pca10056.hex" to the removable file named JLINK and now I see the 4 led blinking. Now I disconect, the USB cable, I don't move the nRF power source selector (SW9) VDD is still selected and I connect the usb cable to the nRF USB connector to power the board and I can see the led blinking.

Now I reconnect the demo board with a USB cable to the MCU Interface (J2) , I copy this hex file "nRF5_SDK_14.0.0_3bcc1f7/examples/ble_peripheral/ble_app_uart/hex/ble_app_uart_pca10056_s140.hex" to the removable file named JLINK and now I see the led 1 blinking, and I can see "Nordic_UART" device if I scan BLE devices. Now I disconect, the USB cable, I don't move the nRF power source selector (SW9) VDD is still selected and I connect the usb cable to the nRF USB connector to power the board and the four leds are switch on with few luminosity and if I scan BLE device I didn't found the Nordic_UART device.