Nrf52840 1.8V programmer

[andrea@al2tech]

Hello,

we are developing our first predict with the Nrf52840 running with VDD at 1.8V(default option).

so far we have always programmed and debugged NRF52 devices using nRF52832 DK. My understanding is that the 52832 DK is only able to program 3V devices.

What options do we have for debugging/programming?

The cheapest Segger Jljnk (Base) is around 500 euros, is there a cheaper option without loosing any functionalities?

thanks!!!!

[Vidar Berg]

Hello,

The development kits do not include a built-in level shifter for the debug output, unlike standalone Segger debuggers. Therefore, the 3V I/O voltage on the nRF52 DK must match the target device. On the nRF52840 DK, it is possible to use an external power source to set the I/O voltage to 1.8V: https://docs.nordicsemi.com/bundle/ug_nrf52840_dk/page/UG/dk/hw_debug_out.html