I have a nRF52840 dongle.
My understanding is that the nRF52840 has an on-chip regulator (Vdd out) that can be set from 1.8 to 3.3V.
So it's recommended to use a debugger that supports level shifting such as the "J-link EDU" which has a target voltage range of 1.2 to 5V. But the "J-link EDU" is $60.
But I see a much cheaper debugger with level shifting , the MAX32625PICO : https://os.mbed.com/platforms/MAX32625PICO/ , which is about $12
From the firmware list for the MAX32625PICO ( https://os.mbed.com/teams/MaximIntegrated/wiki/MAX32625PICO-Firmware-Updates ), one of them says, "VIO is input.VIO is input", so I think that's will work.
Has anyone tried this ?
Thanks