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🟡 J-Link Debug Probes

SEGGER J-Links are the most widely used line of debug probes on the market. They have provided solid value to embedded development for over a decade. Unparalleled performance, an extensive feature set, many supported CPUs and compatibility with popular environments all make J-Link an unbeatable choice.

Overview: J-Link Debug Probes

J-Link: Key Features

J-Link debug probes are the most popular choice for optimizing the debugging and flash programming experience.

Benefit from record-breaking flash loaders, up to 4 MB/s RAM download speed and the ability to set an unlimited
number of breakpoints in the flash memory of MCUs.

J-Link also supports a wide range of CPUs and architectures. Everything from single 8051 to mass market Cortex-M to high-end cores like Cortex-A (32 - & 64-bit).

J-Link supports directly interfacing SPI flashes, without the need of a CPU between J-Link and the SPI flash (directly communicating via the SPI protocol). J-Link is further supported by all major IDEs, including SEGGER Embedded Studio or Visual Studio Code. See a complete list of supported IDEs here, a complete list of supported devices here and a list of SPI Flashes here.

High download speeds

J-Link BASE offers download speeds of up to 1 MB/s, ensuring that project development moves forward smoothly and reliably, with minimized download times.

Real Time Transfer

J-Link BASE offers Real Time Transfer (RTT), which provides a simplified path for information to travel when an application is running. Users can also easily monitor changes in operation.

Broad CPU and IDE support

J-Link BASE works with an extensive range of microcontrollers and IDEs. It enables users to connect their selected microcontroller with their favorite IDE.

J-Link Models click image for details

J-Link BASE Classic

J-Link BASE Compact

J-Link Plus Classic

J-Link PLUS Compact

J-Link ULTRA

J-Link PRO

J-Link PRO PoE

J-Link WiFi

Ultra fast download Speed

J-Link makes Flash memory feel almost like RAM. Since it comes with a set of speed-optimized, built-in flash loaders it can easily and quickly be downloaded into flash
memory. Take a look below to find out more information.

J-link and J-Trace Comparison

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Services & Support

Evaluation Software

NEWSLETTER & Training

J-Link BASE Classic

J-Link BASE Classic is a USB powered JTAG debug probe supporting a large number of CPU cores. Based on a 32-bit RISC CPU, it can communicate at high speed with the supported target CPUs.

J-Link is supported by all major IDEs such as IAR EWARM, Keil MDK, Rowley CrossWorks, Atollic TrueSTUDIO, IAR EWRX, Renesas HEW, Renesas e2studio, and others. Including all models, more than 100,000 J-Links have been sold, making J-Link the most popular debug probe for ARM cores and a de-facto industry standard.

Supports a broad range of microcontrollers: View List
Supports direct download into RAM and flash memory
Multiple CPUs supported—8051, PIC32, RX, ARM7/9/11, Cortex-M/R/A, complete list
Download speed up to 1 MByte/s
Optional Unlimited Flash Breakpoints in external flash memory of Cortex-M systems
Free software updates
Built-in VCOM functionality

Price € 398,--

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General Information about J-Link

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J-Link BASE Compact

The compact variant of the J-Link BASE is designed to mount securely and unobtrusively into development or end-user equipment. The housing's small size and two mounting holes enable the device to be placed into existing equipment housing or to conserve space for direct mounting to a printed circuit board.

Typical applications for J-Link BASE include test fixtures that are used to automate firmware verification during development, as well as long-term testing setups. It can also be used for integrated firmware reflashing or for service purposes in end equipment, minimizing the number of tools required by service technicians.

Price € 398,--

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J-Link PLUS Classic

J-Link PLUS Classic is a USB powered JTAG debug probe supporting a large number of CPU cores.

Based on a 32-bit RISC CPU, it can communicate at high speed with the supported target CPUs. J-Link is used around the world in tens of thousand places for development and production (flash programming) purposes.

J-Link is supported by all major IDEs such as IAR EWARM, Keil MDK, Rowley CrossWorks, Atollic TrueSTUDIO, IAR EWRX, Renesas HEW, Renesas e2studio, and many others.

Including all models, more than 100,000 J-Links have been sold so far, making J-Link probably the most popular debug probe for ARM cores and the de-facto standard.

Price € 598,--

Features

Comes with integrated licenses for: Unlimited breakpoints in flash memory (Unlimited Flash Breakpoints), RDI / RDDI and J-Flash
Fully compatible to the standard J-Link
Direct download into flash memory of most popular microcontrollers supported
Supported CPUs: Any ARM7/9/11, Cortex-A5/A8/A9, Cortex-M0/M1/M3/M4/M7, Cortex-R4, Microchip PIC32 and Renesas RX100/RX200/ RX610/RX621/RX62N/RX62T/RX630/RX631/RX63N
Download speed up to 1 MByte/second
Maximum Target Interface Speed 15 MHz
Supports unlimited breakpoints in flash memory! More info
Setting breakpoints in external flash memory of Cortex-M systems is possible with J-Link's Unlimited Flash Breakpoints technology only!
Free software updates, 1 year of support
Supports concurrent access to CPU by multiple applications
Crossplatform support (runs on Windows, Linux, Mac OS X)
Intelligence in the debug probe firmware More info
Remote Server included. Allows using J-Link remotely via TCP/IP More info
GDBServer included More info
Production flash programming software (-Flash) available More info
Software Developer Kit (SDK) available More info
Supports multiple target interfaces: JTAG, SWD
Supports SWV/SWO (Serial Wire Viewer / Serial wire output)
Wide target voltage range: 1.2V - 3.3V, 5V tolerant
Supports JTAG chains with multiple devices
Embedded Trace Buffer (ETB) support
Various target adapters and optical isolation adapters available
RDI / RDDI interface DLL available. More info
Fully plug and play compatible
No power supply required, powered through USB
Support for adaptive clocking
All JTAG signals can be monitored, target voltage can be measured
Target power supply: J-Link can supply up to 300 mA to target with overload protection

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J-Link ULTRA

J-Link ULTRA is a JTAG/SWD debug probe 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 and comes with licenses for Unlimited Flash Breakpoints, RDI / RDDI and J-Flash.

Price € 798,--

Features

Comes with integrated licenses for: Unlimited breakpoints in flash memory (Unlimited Flash Breakpoints), RDI / RDDI and J-Flash
Fully compatible to the standard J-Link
Very high performance for all supported CPU cores
Download speed up to 3 MByte/second
Hi-Speed USB 2.0 interface
Serial Wire Debug (SWD) supported
Serial Wire Viewer (SWV) supported
Maximum target interface speed 50 MHz
Maximum SWO sampling speed 100 MHz
Target power can be supplied
Target power consumption can be measured with high accuracy.
Direct download into flash memory of most popular microcontrollers supported
Supported CPUs: Any ARM7/9/11, Cortex-A5/A8/A9, Cortex-M0/M1/M3/M4/M7, Cortex-R4, Microchip PIC32 and Renesas RX100/RX200/ RX6xx
Free software updates, 2 years of support
Seamless integration into the IAR Embedded Workbench IDE
Automatic core recognition
No power supply required, powered through USB
Support for adaptive clocking
All JTAG signals can be monitored, target voltage can be measured
Support for multiple devices
Fully plug and play compatible
Wide target voltage range: 1.2V - 3.3V, 5V tolerant
USB and 20-pin JTAG cable included
Memory viewer (J-Mem) included
Remote Server included, which allows using J-Link via TCP/IP networks
RDI / RDDI interface available, which allows using J-Link with RDI / RDDI compliant software
Flash programming software (J-Flash) available
Flash DLL available, which allows using flash functionality in custom applications
Software Developer Kit (SDK) available
Embedded Trace Buffer (ETB) support
Optical isolation adapter available
Target power supply: J-Link can supply up to 300 mA to target with overload protection

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J-Link PRO

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

Speed
Up to 3 MByte/second download speed make J-Link PRO the fastest debug probe on the market. Using TCP/IP instead of USB eliminates latencies from USB usage, resulting in higher debugging speed.
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 (Galvanic isolation)
Ethernet signal lines provide galvanic isolation of J-Link PRO (and so the target system) from network and development PC.
For a complete isolation, shield of Ethernet cable should not be connected to RJ45 connector of J-Link PRO.
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.
Price € 998,--

Features:

Fully compatible to J-Link
Ethernet interface
USB 2.0 Hi-Speed interface
Supported CPUs: Any ARM7/9/11, Cortex-A5/A8/A9, Cortex-M0/M1/M3/M4/M7, Cortex-R4/R5, Microchip PIC32 and Renesas RX100/RX200/RX610/ RX621/RX62N/RX62T/RX630/RX631/RX63N
Free software updates, 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 target interface speed 50 MHz
Maximum SWO sampling speed 100 MHz
Download speed up to 3 MByte/second
Powered through USB or power supply (comes with J-Link PRO)
Support for adaptive clocking
All target interface signals can be monitored, target voltage can be measured
Support for multiple devices
Fully plug and play compatible
Standard J-Link 20-pin target connector
Wide target voltage range: 1.2V - 5V
USB and 20-pin ribbon cable included
Memory viewer (J-Mem) included
Comes with licenses for: J-Link RDI / RDDI, 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

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J-Link PRO PoE

J-Link Pro PoE is SEGGER's specialized debug probe for test farms and supports all popular microcontrollers and microprocessors. It is powered over Ethernet and can simply switch power of the target boards via a USB port.

Product information: J-Link Pro PoE
Get the J-Link Pro PoE, the specialized high-end debug probe for test farms J-Link Pro PoE features a PoE-enabled Ethernet interface as an alternative to the USB connection, specifically to reduce the size of a cable harness in test farms. A USB port on the target side simplifies switching power of the target boards. Easily check hardware status thanks to two additional LEDs. Connects via Ethernet or USB to the host. Cross-platform, it runs on Windows, Linux, and macOS.

Further advantages
J-Link Pro PoE includes a web interface (web server) for easy TCP/IP configuration and integrated licenses for unlimited breakpoints in flash memory, RDI/RDDI & Flash. There is also built-in VCOM functionality, supporting a broad range of CPUs and microcontrollers.

J-Link debug probes are supported by all major IDEs. These include GDB-based IDEs, Visual Studio Code and SEGGER Embedded Studio. Take a look here to view the complete list of Supported IDEs.

Package content

J-Link Pro PoE debug probe
USB cable
.1" 20-pin ribbon cable (18 cm)

Includes free software updates and 1 (one) year of Basic support. Beyond that, SEGGER's Extended Coverage gives you the option to extend hardware warranty and Basic support for one additional year (+12 months) or two additional years (+24 months). These options are only available at the time of purchase. Adding it at a later date is not possible.

Price € 1.198,--

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J-Link WiFi

J-Link WiFi is a fast and reliable debug probe with WLAN/WiFi interface. It supports all popular microcontrollers and microprocessors at high speed.

Price € 1.198,--

Product information: J-Link WiFi

Get the J-Link WiFi, a debug probe with Wifi interface.
Communicates at high speed (up to 15MHz) with supported target CPUs. Need a wireless debug interface? Then J-Link WiFi is the perfect solution - for example if the target is moving or needs to be shielded from the environment. Powered by USB, it can easily connect to the same source of power as the target device J-Link debug probes are supported by all major IDEs. These include GDB-based IDEs, Visual Studio Code and SEGGER Embedded Studio. Take a look here to view the complete list of Supported IDEs.
With over 500,000 J-Link shipped so far, it is probably the most popular debug probe for ARM cores and the de-facto standard.

Further advantages

J-Link WiFi includes a web interface making for easy TCP/IP configuration (built-in webserver). There are also integrated licenses for unlimited breakpoints in flash memory, RDI/RDDI, and J-Flash. It additionally provides I-Link debugging for mobile applications as well as built-in VCOM functionality, supporting a broad range of microcontrollers & CPUs.

Package content