Hi there. I've designed a PCB around the NRF52833-QDAA, mostly following the variation 2 sample layout. Upon assembling my board, I was able to flash it exactly one time using an STLink and SWD (to a blank PlatformIO zephyr project). Ever since, I've been unable to get the NRF to show up as a target using either the STLink or a blackmagic probe. I did not connect all VDD Pins together and I failed to connect DC4 and DC6, but manually connecting those with wires hasn't seemed to make a difference in current draw or connection status. My current draw is presently ~420uA when powering the device with 3v3 to the VDD pins. This feels too low to me, as I was expecting around 3mA for active CPU mode. I get approximately the same current draw when providing 5v to VDDH.
I ultimately plan to power this in high voltage mode, which as far as I understand, means I only need to provide a voltage of 2.5-5.5v to the VDDH pin. Is my understanding correct, or is there some necessary configuration in order to use High voltage mode? It was my also my understanding that was automatic.
I've uploaded my KiCad board files to github for possible review. Any feedback or information you may be able to provide me with is much appreciated.
Thanks!
