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Segger Embedded Software Solutions
Embedded Software Solutions

J-Link Pro

JTAG / SWD Emulator with USB & Ethernet interface

J-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.

It connects via Ethernet or USB to the host, running Windows, Linux or Mac OS X.

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 debug probe far away from the PC, over a hardwired or wireless network, 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.

pdf Documentation download


  • Fully compatible to J-Link
  • Ethernet interface
  • USB 2.0 interface
  • Supported CPUs: Any ARM7/9/11, Cortex-A5/A8/A9, Cortex-M0/M1/M3/M4, Cortex-R4 and Renesas RX610/RX621/RX62N/RX62T/RX630/RX631/RX63N
  • Free software updates1, 2 years of support
  • Additional LEDs for power and RESET indication
  • Comes with web interface for easy TCP/IP configuration (built-in webserver)
  • Serial Wire Debug (SWD) supported
  • Serial Wire Viewer (SWV) supported
  • Automatic core recognition
  • Maximum JTAG speed 60 MHz
  • Download speed up to 3 MByte/second
  • Seamless integration into the IAR Embedded Workbench IDE
  • Powered through USB or power supply which comes with J-Link Pro
  • Support for adaptive clocking
  • All JTAG signals can be monitored, target voltage can be measured
  • Support for multiple devices
  • Fully plug and play compatible
  • Standard 20-pin JTAG connector
  • Wide target voltage range: 1.2V - 3.3V, 5V tolerant
  • USB and 20-pin ribbon cable included
  • Memory viewer (J-Mem) included
  • Comes with licenses for: J-Link RDI, J-Link Unlimited Flash Breakpoints, J-Link GDB Server, J-Flash
  • Software Developer Kit (SDK) available
  • Embedded Trace Buffer (ETB) support
  • 14-pin JTAG adapter available
  • Galvanic isolation from host system via Ethernet
  • Optical isolation adapter available
  • Target power supply: J-Link can supply up to 300 mA to target with overload protection.

Package content

J-Link PRO is delivered with the following components:

  • J-Link PRO with standard 20-pin 0.1" male connector (compatible to J-Link)
  • 20-pin, 0.1" target ribbon cable
  • Ethernet cable (1m)
  • USB cable


J-Link Pro comes with licenses for all J-Link related SEGGER software products: J-Link Flash Breakpoints, J-Link RDI, J-Flash, J-Link GDB Server, providing the optimum debugging solution for professional developers. J-Link Pro can be used with almost all ARM debuggers, enabling download to flash memory with an unlimited number of breakpoints when debugging programs located in flash memory of most popular ARM microcontrollers. It also comes with the license to use J-Flash, SEGGER´s popular flash programming software.

Why Pro?

There are many aspects which make the J-Link Pro very attractive to use:

Price: Buying a J-Link Pro, which comes with licenses for all J-Link-related SEGGER software, will save you a lot of money because buying a J-Link and all licenses separate is more expensive.
Speed: J-Link Pro via TCP/IP provides higher download speed than J-Link via USB.
Usability: J-Link Pro can be used "out-of-the-box". A built-in J-Link GDB Server is planned to be implemented in the near future.
Flexibility: Due to the Ethernet interface, long distances between the development PC and the target system are possible. You can set a default gateway for J-Link Pro, so it is also possible to use it in large intranets.
Security: When using J-Link Pro via Ethernet, galvanic isolation of the development PC and the target system is supported.
Ready future use: J-Link Pro provides more memory for future firmware extensions (e.g. ARM11, X-Scale, Cortex R4 and Cortex A8).

Model Overview

There is a J-Link or J-Trace model available to fit all project needs. J-Trace is a full superset of J-Link with the added benefit of trace capabilities. J-Trace models are designed for one particular family of cores.

Available models vary in price, speed, and other hardware features such as built-in trace memory and on-board Ethernet, as well as advanced software features. The advanced sotware features are:

  • J-Flash (High-speed production grade flash programming software)
  • J-Link Unlimited Flash Breakpoints (Unlimited number of breakpoints while debugging in flash memory)
  • J-Link RDI (Support for RDI compatible debuggers)
Model Download Speed into RAM Download into Flash GDB Server Unlimited Flash Breakpoints J-Flash RDI Ethernet
J-Link PRO 3.0 MBytes/sec
J-Link ULTRA+ 3.0 MBytes/sec
J-Link PLUS 1.0 MBytes/sec
J-Link 1.0 MBytes/sec
J-Link EDU 800 KBytes/sec
Debug probes with built-in Trace memory
J-Trace Cortex-M 3.0 MBytes/sec
J-Trace ARM 800 KBytes/sec



For more information please contact the MicroWay sales team: buynow
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MicroWay Pty Ltd
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MicroWay Pty Ltd
PO Box 1733,
Crows Nest, NSW 1585, Australia
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Fax: 1300 132 709
email: sales@microway.com.au
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MicroWay Pty Ltd (NZ)
PO Box 912026
Victoria Street West
Auckland 1142, New Zealand
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