Full J-Link Support
The unlimited breakpoints in flash memory feature can be used free of charge for evaluation. The evaluation period is not time limited. For commercial use a separate license is required.
Free Software Updates
As a legitimate owner of a SEGGER J-Link, you can always download the latest software free of charge. Though not planned and not likely, we reserve the right to change this policy. Note that older models may not be supported by newer versions of the software. Typically, we support older models with new software at least 3 years after end of life.
Supports concurrent access to CPU by multiple applications
J-Link allows multiple applications to access a CPU at the same time. This has numerous applications. J-Link commander can be used in parallel to a debugger, a tool to communicate via DCC can be used in parallel to a debugger or a visualization tool such as Micrium's u/C-Probe or SEGGER's kernel viewer embOSView. This feature is currently not available for Cortex A and R cores.
runs on Windows, Linux, macOS. The MAC and Linux versions are fully usable, but limited to the following components:
J-Link Commander, command line GDBServer, shared library (DLL-equivalent)
Licensing and Support
- J-Link EDU may only be used for non-commercial purposes. J-Link EDU does not include support.
- However you may submit your question to the SEGGER forum.
Specification Value Supported OS Microsoft Windows 2000, XP, 2003, Vista, 7 and newer
macOS 10.5 and higher
Electromagnetic compatibility (EMC) EN 55022, EN 55024 Operating temperature +5°C ... +60°C Storage temperature -20°C ... +65 °C Relative humidity (non-condensing) Max. 90% rH Mechanical Size (without cables) 100mm x 53mm x 27mm Weight (without cables) 70g Available Interfaces USB interface USB 2.0 (Hi-Speed) Target interface JTAG/SWD 20-pin JTAG/SWD Interface, Electrical Power supply USB powered
Max. 50mA + Target Supply current.
Target interface voltage (VIF) 1.2V ... 5V Current drawn from target voltage sense pin (VTRef) < 25µA Target supply voltage 4.5V ... 5V (if powered with 5V on USB) Target supply current Max. 300mA Reset type Open drain. Can be pulled low or tristated Reset low level output voltage VOL <= 10% of VIF For the whole target voltage range (1.2V <= VIF <= 5V) LOW level input voltage (VIL) VIL <= 40% of VIF HIGH level input voltage (VIH) VIH >= 60% of VIF For 1.2V >= VIF <= 3.6V LOW level output voltage (VOL) with a load of 10 kOhm VOL <= 10% of VIF HIGH level output voltage (VOH) with a load of 10 kOhm VOH >= 90% of VIF For 3.6 <= VIF <= 5V LOW level output voltage (VOL) with a load of 10 kOhm VOL <= 20% of VIF HIGH level output voltage (VOH) with a load of 10 kOhm VOH >= 80% of VIF JTAG/SWD Interface, Timing JTAG speed Max. 15 MHz SWO sampling frequency Max. 30 MHz Data input rise time (Trdi) Trdi <= 20ns Data input fall time (Tfdi) Tfdi <= 20ns Data output rise time (Trdo) Trdo <= 10ns Data output fall time (Tfdo) Tfdo <= 10ns Clock rise time (Trc) Trc <= 3ns Clock fall time (Tfc) Trc <= 3ns
- • Supports a broad range of microcontrollers
- • Supports direct download into RAM and flash memory
- • Multiple CPUs supported—8051, PIC32, RX, ARM7/9/11, Cortex-M/R/A, RISC-V
- • Download speed up to 1 MByte/s
- • Supports unlimited breakpoints in flash memory, additional license required.
- • Setting breakpoints in external flash memory of Cortex-M systems is possible with J-Link's Unlimited Flash Breakpoints technology only
- • Free software updates
- • Built-in VCOM functionality