Hello all,
I'm using a nrf52840 and it's working fine. However, when I supply the chip with 5v on VDDH the GPIO output voltage is 1.8v. When I supply the chip with 3.3v on VDD, the GPIO pin outputs 3.3v. I have also set the regout register "NRF_UICR->REGOUT0 = UICR_REGOUT0_VOUT_3V3;". When supplied on VDDH, VDD is left unconnected. How can I get the GPIO to output 3v3 when the chip is supplied through VDDH?
Any help would be appreciated.