Run uart example at 1.8v source

RE: Run uart example at 1.8v source

Stian Røed Hafskjold — Tue, 21 Jul 2020 12:44:35 GMT

If I understand you correctly you want to use high voltage mode, so that the VDDH on the nRF52 is powered with 5V and the VDD is regulated down to 1.8V. And you want to communicate with UART over USB at the same time.

First you can connect a USB cable to the nRF USB port. You will have to select the USB peripheral on the nRF52 to be used for the UART transmission.

Set the nRF source switch to USB in order to power the VDDH on the nRF52 with 5V from the USB. Now the VDD on the board will be 1.8V (default)

You will have to leave the USB IF MCU cable connected in order to power the rest of the board.

RE: Run uart example at 1.8v source

RJD — Mon, 20 Jul 2020 19:21:36 GMT

Hello Edvin, thank you for your suggestion, unfortunately it didnt work out

RE: Run uart example at 1.8v source

Edvin — Fri, 17 Jul 2020 11:45:01 GMT

You should use the micro usb port to the left in that image to connect to your computer.

Set the "nRF source" switch to LiPo, and the power switch to ON. Leave the switch in the upper right on "DEFAULT".

See if that works.