Hello,I am working with the nRF9151 SMA DK and I need the VDD_GPIO rail to operate at 3.3V to interface with some external components.
According to the schematics, VOUT1 is the main rail voltage (VDD) which supplies the following nodes: VDD, VIO, VDD_imcu, VDD_1.8, and VDD_GPIO.
My initial plan is to change the configuration using nRF Connect for Desktop -> Board Configuration and select VOUT1= 3.3V.
I would like to know:
- Is it safe to perform this modification directly via the Board Configuration tool while using the nRF9151 DK hardware?
- What onboard components or support circuits on the nRF9151 DK will be affected or risk being damaged by raising this main rail from 1.8V to 3.3V?
- Do you recommend forcing this change on the development kit, or should I keep the DK running at 1.8V and use external level shifters for my 3.3V GPIO requirements instead?
Thank you very much for your help!