NRF52840-DK Power From 5V Power Supply

[EAkeila]

Hi,

I'm trying to power the chip on the DK from 5V power supply. I connected the USB connector J3, and switched SW9 to "USB Source". However, it seems that this is somehow powered from 1.8V ( this is by monitoring the output voltage from GPIO). I need to use both the programming USB (J2) and the 5V power source. Thanks in advance.

Regards

Ehad

[Elfving]

Hello Ehad!

I am a little bit confused as what you are trying to do and what the issue is. If you want to use the programming and debugging chip along with the main nRF52840 then you should connect the USB connector to J2 and set SW9 to VDD. You can power just the nRF using J3 however, if that is what you prefer.

I should also mention that due to the holidays you might have to expect both limited help and slower responses on DevZone.

Best regards,

Elfving

[Gmrck]

Hi, Elfving,

Is it possible to power 5V to the nrf52840DK both SOC and MCU through USB J2? My goal is to drive the SOC in a HIGH Voltage mode. I can do it via the USB J3, however, the documentation also says it is possible to do with using USB J2. Could you please let me know the exact configuration? It doesn't work with USB connected to J2 and the SW9 at USB position at all. With USB at J2 and SW9 in VDD position the SOC is in a Normal mode.