Terms of use
The software consists of proprietary programs of SEGGER, protected under copyright and trade secret laws. All rights, title and interest in the software are and shall remain with SEGGER. For details, please refer to the license agreement which needs to be accepted when installing the software. The text of the license agreement is also available as entry in the start menu after installing the software. Download license agreement
Use of software
SEGGER J-Link software may only be used with original SEGGER products and authorized OEM products. The use of the licensed software to operate SEGGER product clones is prohibited and illegal.
Use of the software with 3rd party tools
For simplicity, some components of the J-Link software are also distributed from partners with software tools designed to use J-Link. These tools are primarily debugging tools, but also memory viewers, flash programming utilities but also software for other purposes. Distribution of the software components is legal for our partners, but the same rules as described above apply for their usage: They may only be used with original SEGGER products and authorized OEM products. The use of the licensed software to operate SEGGER product clones is prohibited and illegal.
Original SEGGER products
The following products are original SEGGER products for which the use of the J-Link software is allowed:
J-LinkJ-Link is a JTAG emulator designed for ARM cores. It connects via USB to a PC running Microsoft Windows 2000, Windows XP, Windows 2003, Windows Vista or Windows 7. J-Link has a built-in 20-pin JTAG connector, which is compatible with the standard 20-pin connector defined by ARM. | ![]() |
J-Link ProJ-Link Pro is a refined version of the regular J-Link. It has an Ethernet interface in addition to the USB interface, as well as two additional LEDs which are used as hardware status indicators. J-Link Pro is fully compatible with J-Link and can be used "out-of-the-box". J-Link Pro uses DHCP per default. The built-in webserver makes manual configuration easy and convenient. Ethernet allows using the emulator far away from the PC in a development or production environment; download and debugging speed is higher and Ethernet provides electrical isolation from the PC. All features of the regular J-Link also apply to this product | ![]() |
J-Link UltraJ-Link Ultra is a JTAG/SWD emulator designed for ARM/Cortex and other supported CPUs. It is fully compatible to the standard J-Link and works with the same PC software. Based on the highly optimized and proven J-Link, it offers even higher speed as well as target power measurement capabilities due to the faster CPU, built-in FPGA and High speed USB interface. It connects via USB to a PC running Microsoft Windows 2000, Windows XP, Windows 2003, Windows Vista or Windows 7. J-Link Ultra has a built-in 20-pin JTAG/SWD connector. All features of the regular J-Link also apply to this product | ![]() |
J-Link LiteThe J-Link Lite is a fully functional version of SEGGER J-Link. If you are selling evaluation-boards, J-Link Lite is an inexpensive emulator solution for you. Your customer receives a widely acknowledged JTAG-emulator which allows him to start right away with his development. |
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J-Link Lite CortexM | ![]() |
J-Link Lite RX |
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J-Link EDUThe J-Link EDU emulator is a standard J-Link emulator wrapped in a new housing for educational use.
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J-Link OBJ-Link OBs (J-Link On Board) are single chip versions of J-Link which are used on various eval boards. It is legal to use J-Link software with these boards, provided that the eval board manufacturer has obtained a license from SEGGER. The following list shows the eval board manufacturer which are allowed to use J-Link OBs:
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J-Link ColdFireJ-Link ColdFire® BDM 26 is a USB powered BDM emulator for ColdFire® cores. It connects via USB to the Windows (2000/XP/Vista) PC host. | ![]() |
J-Trace ARMJ-Trace ARM is a JTAG emulator designed for ARM cores which includes trace (ETM) support. It connects via USB to a PC running Microsoft Windows 2000, Windows XP, Windows 2003, Windows Vista or Windows 7. J-Trace has a built-in 20-pin JTAG connector and a built in 38-pin JTAG+Trace connector, which is compatible with the standard 20-pin connector and 38-pin connector defined by ARM. | ![]() |
J-Trace for Cortex-MJ-Trace for Cortex-M is a JTAG emulator designed for Cortex-M cores which includes trace (ETM) support. J-Trace for Cortex-M can be used as a J-Link and it also supports ARM7/9 cores. | ![]() |
Flasher ARMFlasher ARM is a programming tool for microcontrollers with on-chip or external Flash memory and ARM core. Flasher ARM is designed for programming flash targets with the J-Flash software or stand-alone. In addition to that Flasher ARM has all of the J- Link functionality. Flasher ARM connects via USB or via RS232 interface to a PC, running Microsoft Windows 2000, Windows XP, Windows 2003, Windows Vista or Windows 7. Flasher ARM has a built-in 20-pin JTAG connector, which is compatible with the standard 20-pin connector defined by ARM. | ![]() |
Flasher RXFlasher RX is a programming tool for Renesas RX600 series microcontrollers with on-chip or external flash memory and Renesas RX core. Flasher RX is designed for programming flash targets with the J-Flash software or stand-alone. In addition to that Flasher RX has all of the J-Link RX functionality. Flasher RX connects via USB or via RS232 interface to a PC, running Microsoft Windows 2000, Windows XP, Windows 2003, Windows Vista or Windows 7. Flasher RX itself has a built-in 20-pin JTAG connector but is shipped with an 14-pin adapter for Renesas RX devices. | ![]() |
J-Link OEM versions
There are several different OEM versions of J-Link on the market. The OEM versions look different, but use basically identical hardware. Some of these OEM versions are limited in speed, some of these can only be used with certain chips and some of these have certain add-on features enabled, which normally require a license. In any case, it should be possible to use the J-Link software with these OEM versions. However, proper function cannot be guaranteed for OEM versions. SEGGER Microcontroller does not support OEM versions; support is provided by the respective OEM.
Analog Devices: mIDASLinkmIDASLink is an OEM version of J-Link, sold by Analog Devices. | ![]() |
Atmel: SAM-ICESAM-ICE is an OEM version of J-Link, sold by Atmel. | ![]() |
Digi: JTAG LinkDigi JTAG Link is an OEM version of J-Link, sold by Digi International. | ![]() |
Freescale: J-Link Lite FSLJ-Link Lite FSL is an OEM version of J-Link, sold by Freescale. | ![]() |
IAR: J-Link / J-Link KSIAR J-Link / IAR J-Link KS are OEM versions of J-Link, sold by IAR. | ![]() |
IAR: J-Link LiteIAR J-Link Lite is an OEM version of J-Link, sold by IAR. | ![]() |
IAR: J-TraceIAR J-Trace is an OEM version of J-Trace, sold by IAR. | ![]() |
NXP: J-Link LiteJ-Link Lite LPC Edition is an OEM version of J-Link, sold by NXP. | ![]() |
Illegal Clones
Clones are copies of SEGGER products which use the copyrighted SEGGER Firmware without a license. It is strictly prohibited to use SEGGER J-Link software with illegal clones of SEGGER products. Manufacturing and selling these clones is an illegal act for various reasons, amongst them trademark, copyright and unfair business practise issues.
The use of illegal J-Link clones with this software is a violation of US, European and other international laws and is prohibited.
If you are in doubt if your unit is a legal SEGGER product or OEM product and may be legally used with SEGGER J-Link software or if you find an offer where you are in doubt if it is a legal OEM product, please get in touch with us.
End users may be liable for illegal use of J-Link software with clones.
Terms of use





















