Tracing on Nordic Semiconductor nRF52
The Nordic Semiconductor nRF52 device series supports ETM tracing via trace pins. However different pins are used on different subfamilies. The following article will link to each setup respectively and offer an out-of-the-box trace example.
The Wiki article describing the nRF52832 device family can be found here: https://wiki.segger.com/Tracing_on_Nordic_Semiconductor_nRF52832
The Wiki article describing the nRF52840 device family can be found here: https://wiki.segger.com/Tracing_on_Nordic_Semiconductor_nRF52840