J-Link PLUS
The JTAG/SWD Debug Probe
USB-powered JTAG/SWD debug probe
High-speed communication for efficient debugging
Available as J-Link PLUS Classic and J-Link PLUS Compact with identical functionality
1. Supported Devices
2. Use Cases
3. J-Link Technology
4. Tool Set
5. Software
6. Buyers Guide
7. Customer Support
8. Product Images
9. Technical Specifications
Key features
High Download Speeds
J-Link PLUS 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 PLUS 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 PLUS works with an extensive range of microcontrollers and IDEs. It enables users to connect their selected microcontroller with their favorite IDE.
Supported Devices
The list of supported manufacturers, families, devices, and SoCs includes tens of thousands of devices in hundreds of device families.
Use Cases
Communication Testing
When testing communication protocols such as WiFi, ZigBee, or Matter, large-scale test setups are crucial for ensuring reliability and performance. A test farm using J-Link PLUS provides a way to test devices under various conditions and ensure that they can handle interference and high traffic volumes.
Integration Into Rigs
J-Link PLUS Compact's smaller form factor versus other J-Link devices makes it an ideal choice for integration into automated rigs and production environments. Its small size, combined with powerful functionality, allows it to be seamlessly incorporated into setups where space is limited. Offering reliable performance and exceptional flexibility, J-Link PLUS Compact is perfectly suited for manufacturing, automated testing, and other applications that demand a consistent, high-performance debug probe with a space-efficient design.
J-Link Technology
Unlimited Breakpoints
Set as many breakpoints as you need in internal or external flash. Debug thoroughly, even when hardware breakpoints run out.
Monitor Mode
Keep essential system functions running while debugging. Perfect for real-time applications that must stay responsive.
Power Profiling
Measure and optimize energy consumption with high sampling rates and 50 µA resolution. Ideal for battery-powered or energy-harvesting devices.
Tool Set
J-Link PLUS comes with a versatile suite of software tools that enhance its performance and flexibility for debugging and programming. Utilities such as J-Link Commander, J-Link Configurator, and J-Link Remote Server make it a powerful and convenient tool for any development setup. Below are selected highlights from this tool set.
J-Link Pro supports SEGGER Embedded Studio as well as virtually all Integrated Development Environments (IDEs), ensuring maximum flexibility in any development setup.
It integrates seamlessly with SEGGER's Ozone debugger, providing a powerful environment for performance analysis, instruction tracing, and code optimization.
J-Flash enables programming of microcontroller internal and external flash memories. Exceedingly versatile, it runs on Microsoft Windows, Linux, and macOS, and it supports Cortex Arm, RX, and RISC-V devices and cores.
J-Link DSK
J-Link Device Support Kit (DSK) allows silicon vendors and users to add debug and flash programming support for new devices. A new device typically requires a flash loader and, in some cases, a script defining special connect and reset sequences.
DSK includes the SEGGER flash loader as well as a collection of example script files for devices that require special handling.
J-Link SDK
J-Link Software Development Kit (SDK) enables the integration of J-Link and J-Trace support into custom applications. It is used in professional IDEs, such as SEGGER Embedded Studio, to enable direct debugging via J-Link/J-Trace, as well as in customized production utilities. Available for Windows, Linux, and macOS, the SDK can be used with nearly any programming language or solutions.
Software
All software is included free of charge, as are licenses for all J-Link-related SEGGER software products, such as J-Link Unlimited Flash Breakpoints, Ozone, RDI, and J-Flash.
Buyers Guide
Customer Support
J-Link PLUS comes with one year (12 months) of Basic Support. Beyond that, SEGGER's Extended Coverage gives users the option to extend the hardware and Basic Support for one additional year (12 months) or two additional years (24 months).
Technical Specifications
| General | |
| Supported OS | Microsoft Windows (x86/x64), Linux (x86/x64/Arm), macOS (x86/Apple Silicon) |
| 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 of J-Link PLUS Classic (without cables) | 100mm x 53mm x 27mm |
| Weight of J-Link PLUS Classic (without cables) | 70g |
| Size of J-Link PLUS Compact (without cables) | 46mm x 46mm x 17mm |
| Weight of J-Link PLUS Compact (without cables) | 20g |
| Available interfaces | |
| USB interface (J-Link PLUS) | USB 2.0 (Hi-Speed); USB Type B |
| USB interface (J-Link PLUS Compact) | USB 2.0 (Hi-Speed); Micro USB |
| Target interface | JTAG/SWD 20-pin (adapters available) |
| 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 | 5V (derived from USB voltage) |
| Target supply current | Max. 300mA |
| Reset type | Open drain with 100 Ohms series resistor. 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 <= 20% of VIF |
| HIGH level output voltage (VOH) with a load of 10 kOhm | VOH >= 80% 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 | |
| Target interface speed | Max. 50 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 |
Assembly Dimensions
The compact variant of the J-Link PLUS is designed to mount securely and unobtrusively into development or end user equipment. The small size and two mounting holes enable placing the J-Link PLUS Compact into existing equipment housings or to reserve space for direct-to-PCB mounting.
Typical applications are test fixtures that are used to automate firmware verification during development, or long-term test setups. It also can be used for integrated firmware reflash or service purposes inside end equipment, minimizing the number of tools that service technicians must carry around.
Explosion view of the J-Link PLUS Compact
Assembly dimensions of the J-Link PLUS Compact
Product Images
J-Link PLUS Classic Front
J-Link PLUS Classic Host Connector
J-Link PLUS Classic Target Connector
J-Link PLUS Compact Front
J-Link PLUS Compact Host Connector
J-Link PLUS Compact Target Connector
Package Content
J-Link PLUS Classic
J-Link PLUS Classic
1" 20-Pin Ribbon Cable
USB Cable
J-Link PLUS Compact
J-Link PLUS Compact
1" 20-Pin Ribbon Cable
USB-C Cable