The SEGGER J-Link ULTRA+ is a high-performance JTAG/SWD debug probe for Arm® Cortex-A/R/M and selected other cores. It delivers up to 4 MB/s download speed and supports target interface clocks up to 50 MHz, enabling rapid flash programming and responsive debug sessions.
Included Software & Licences
ULTRA+ comes with licences for Unlimited Flash Breakpoints, J-Flash, RDI/RDDI and the Ozone debugger, plus the J-Link GDB Server. Multi-platform host support (Windows, Linux and macOS) and broad IDE compatibility simplify integration into existing workflows.
Power & Trace-Related Capabilities
Built-in power measurement (up to 200 kSa/s, 50 µA resolution) helps profile low-power designs. SWO is supported, and a virtual COM (VCOM) interface provides convenient target UART over USB. For instruction trace via ETM, consider SEGGER J-Trace PRO.
Related Models
Within the J-Link family, engineers may also consider J-Link PLUS (same software ecosystem) or J-Link PRO (adds Ethernet and high-duty production use). Choosing ULTRA+ provides higher speed and power profiling in a compact USB probe.
Why Consider ULTRA+
ULTRA+ pairs proven J-Link reliability with faster downloads, advanced software features and integrated power profiling—ideal for professional teams needing measurable throughput gains and actionable power insights.