Configuring nRF52832's GPIO to 1.8 V

[dpalma]

Hi,

I am working with a nRF52832 in the nRF52-DK. I am trying to set high logic level of digital outputs to 1.8 V. I have been reading about different operation modes (normal and high voltage) and REGOUT0 register, but I am not sure if this is possible in the nRF52-DK. Is it?

Besides, the final application is to get some data from UART and output it through SPI peripheral at 1.8 V. Power would be drawn from USB port. Is this possible?

Thanks in advanced.

[ovrebekk]

Hi David

High end nRF52 devices like the nRF52840 and nRF52833 have two regulator stages, and the ability to configure the GPIO voltage, but the nRF52832 does not have this capability. 

On the nRF52832 there is just a single regulator stage, and the GPIO voltage is set directly by the supply voltage. 

When powering the nRF52DK from USB the supply (and GPIO) voltage will be approximately 3.0V, and the only option to get a supply of 1.8V on the DK is to use the External supply connector to power the kit rather than the USB port. 

In order to do this you will need some external power supply that can provide 1.8V. 

Best regards
Torbjørn

[dpalma]

Got it. Thank you very much for your response!

[ovrebekk]

I am happy to help David. The best of luck with your project