J-Link is a family of JTAG debug probes designed for debugging and programming embedded systems, particularly those based on ARM microcontrollers. It's widely used by developers for tasks such as flashing firmware, setting breakpoints, stepping through code, inspecting memory, and generally debugging software running on embedded devices. The J-Link provides a connection between a host computer and the target device using JTAG, SWD, or other debug interfaces.
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