Overview
Adapts from the standard 20 pin 0.1" J-Link connector to the standard 10-pin 0.05" Cortex-M connector that is also used on many non-Cortex-M designs but with non-standard pinout.
SEGGER J-Link debuggers are the most popular choice for optimizing the debugging and flash programming experience.
Documentation
Debugging with the Arduino IDE 2.0
Learn how to set up a Zero board, J-Link and Atmel-ICE debuggers with the Arduino IDE 2.0, and how to debug a program.
Using the Segger J-Link debugger with the MKR boards
Learn how to set up a MKR board with the Segger J-link debugger.