Re: Power Configuration of nrf52840

Puzdrowski, Andrzej


So you must have supplied nRF52840 from VDDH pin – so it power regulator circuit works in high voltage mode.


Then internal regulator generate the GPIO output voltage:

You need to set UICR->REGOUT0 properly, 5 is proper value for select 3.3 V


For more info see nRF52840 OPS, especjali POWER chapter




From: zephyr-devel-bounces@... [mailto:zephyr-devel-bounces@...] On Behalf Of ashish.shukla@...
Sent: Wednesday, February 07, 2018 8:22 AM
To: zephyr-devel@...; zephyr-users@...
Subject: [Zephyr-devel] Power Configuration of nrf52840


Hello everyone !!!

I'm working with custom PCB of nrf52840. I need to set VDD voltage which is also GPIO high level voltage equals to 3.3V, otherwise it's 1.8V by default.

How can I configure this?


How can I access registers of nrf52840 in zephyr architecture?    




Warm regards,
Ashish Shukla

Jr. Embedded Engineer

Research & Development


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