J-Link PRO — The universal debug probe
J-Link PRO is SEGGER's versatile JTAG/SWD programming and debug probe with USB and Ethernet interfaces.
Overview
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. 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.
Key features
- Additional Ethernet interface
- Download speed up to 4 MB/s
- Unlimited breakpoints in flash memory (Flash Breakpoints)
- Ozone, RDI / RDDI and J-Flash
- Additional LEDs for power and RESET indication
- Comes with web interface for easy TCP/IP configuration (built-in webserver)
- Built-in VCOM functionality
- Supports a broad range of microcontrollers
- Supports direct download into RAM and flash memory
- Free software updates
Supported devices
The list of supported manufacturers, families and devices and SoCs includes tens of thousands of devices in hundreds of device families.
Device not listed? Please don’t hesitate to contact us.
Software
All software is included free of charge. It comes with licenses for all J-Link related SEGGER software products: J-Link Unlimited Flash Breakpoints, J-Link RDI / RDDI, J-Flash, J-Link GDB Server, providing the optimum debugging solution for professional developers.
For every J-Link, the J-Link Software and Documentation Package is available:
Cross-platform
As a cross-platform solution, J-Link PRO comes with the setup and control software for Linux, macOS and Windows. Software and firmware updates are included. Similarly, use on all currently supported target devices, and any that will be added, is also included.
J-Flash
J-Flash is part of the J-Link Software and Documentation package and allows to program internal and external flash memory of a microcontroller-based embedded system via J-Link.
Ethernet
J-Link PRO features a GBit-Ethernet interface as an alternative to the USB connection.
Ozone — The J-Link debugger
Standalone debugger
Ozone focuses on debugging. No compiler or project window will distract your work, All debug windows can be moved, resized and docked, to provide you with the workspace you need.
Ozone offers all well-known debug controls and information windows, and a bit more. Instruction trace, power graph, live watches, and real-time terminal I/O further extend these capabilities.
Performance analyzer
With J-Link's High-Speed Sampling technology, Ozone can sample and visualize an embedded system's variables over time. Checking values and flags in the debugger is easy, while the target keeps running.
J-Link's power measurement features enable you to record the power consumption of your target device in a debug session. This is especially helpful when you develop a low-power device and need to know how power consumption changes when you enable or disable certain components.
Use cases
Wireless debugging/telemetry
The J-Link PRO can be used for a wireless connection between monitoring/debugging PC and the target device. To achieve this, the J-Link PRO needs to be connected to a WiFi router or switch.
Learn more at: https://wiki.segger.com/Using_J-Link_via_WiFi#Via_WiFi_bridge
Media gallery
Product photos
Videos
Mar. 2022 | 5:24 min
J-Link — J-Link Configurator
Mar. 2022 | 7:48 min
J-Link — J-Link Commander
Mar. 2019 | 4:35 min
J-Link Remote Server — Intro
Jan. 2022 | 4:02 min
J-Link — Performance analysis
Aug. 2016 | 1:33 min
BBC micro:bit J-Link Upgrade — Intro
Technical specifications
| General | ||||||||
|---|---|---|---|---|---|---|---|---|
| Supported OS | Microsoft Windows (x86/x64), Linux (x86/x64/Arm), macOS (x86) | |||||||
| 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) | 73g | |||||||
| Available interfaces | ||||||||
| Ethernet interface | 100 Mbit/s | |||||||
| USB interface | USB 2.0 (Hi-Speed) | |||||||
| Target interface | JTAG/SWD 20-pin | |||||||
| JTAG/SWD interface, electrical | ||||||||
| 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. 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. 100 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 | |||||||
| Analog power measurement interface | ||||||||
| Sampling frequency | 200 kHz | |||||||
| Resolution | 50 uA | |||||||
Package content
FAQ
Q: Can I use J-Flash with J-Link PRO?
A: Yes. J-Link PRO comes with a license for J-Flash preinstalled on the probe itself. No license setup necessary, simply plug in J-Link PRO and start using J-Flash.
Q: What is the advantage of J-Link versus simple probes such as FTDI-based systems?
A: J-Link has numerous advantages: the actual J-Link software supplied by SEGGER (which enables use with common IDEs), the availability of unlimited flash breakpoints for the debugging of software which runs in the flash of microcontrollers, it’s high speed and it’s simple, fast download into flash memory.
In contrast to most simple probes, J-Link supports adaptive clocking as well as SWD and SWO. It also functions more stably, since it is not just a dump USB to JTAG converter. Instead, it uses the intelligence of the built-in CPU which provides more robust communication. This is especially so in situations where the target CPU runs at low clock speeds.
Q: May I work with more than one J-Link at the same time, on the same machine?
A: Yes, you can connect an unlimited number of J-Links to your PC. No special configuration required; each J-Link is registered with its unique serial number on the PC. This enables you to have multiple J-Links connected at once.
Q: I have multiple Arm cores in my JTAG chain. How can I debug them (simultaneously) with J-Link?
A: That's simple: Two or more debuggers can use the same J-Link simultaneously. Multi-core debugging requires multiple debuggers or multiple instances of the same debugger. You need to tell your debugger which device in the scan chain you want to debug. Additional special settings are not required.
Q: Does J-Link support the Embedded Trace Buffer (ETB)?
A: Yes. J-Link supports ETB on Cortex-M3/M4/M7 and Cortex-A/R (if implemented by target device).
Q: Does J-Link support the Micro Trace Buffer (MTB)?
A: Yes.
Q: Does J-Link support the Embedded Trace Macrocell (ETM)?
A: No. ETM requires another connection to the ARM chip and a CPU with built-in ETM. ETM is supported by the J-Trace product family.