J-Link PRO
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 web server makes manual configuration easy. Ethernet allows the use of the debug probe far away from the PC, over a hardwired or wireless network, in a development or production environment. It also makes download and debugging speeds higher and provides electrical isolation from the PC. The product also comes with all features of the regular J-Link.
Key features
- Additional Ethernet interface
- Download speed up to 4 MB/s
- Unlimited breakpoints in flash memory (Flash Breakpoints)
- Use with 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
Software
All software is included free of charge. It comes with licenses for all J-Link related SEGGER software products, such as J-Link Unlimited Flash Breakpoints, Ozone, RDI/RDDI, J-Flash, J-Link GDB Server, providing the optimum debugging solution for professional developers.
Multi-platform
As a multi-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 a part of the J-Link Software and Documentation Package and allows the programming of the internal and external flash memory of a microcontroller-based embedded system via J-Link.
Speed
Up to 4 MB/s 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.
Ethernet
J-Link PRO provides an Ethernet interface as an alternative to USB connection.
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 making it also possible to use it in large intranets.
Safety (galvanic isolation)
Ethernet signal lines provide galvanic isolation of J-Link PRO (and so the target system) from the network and development PC.
Flash Breakpoints
The J-Link PRO comes with an additional feature, called Unlimited Flash Breakpoints. Unlimited Flash Breakpoints allow the user to set an unlimited number of breakpoints when debugging in flash memory.
Ozone — The J-Link debugger
Ozone is the debugger for J-Link and J-Trace. It includes all well-known debug controls and information windows and makes use of the best performance of J-Link and J-Trace debug probes.
Standalone debugger
Ozone focuses on debugging. There are no compiler or project window distractions. 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 more. Instruction trace, power graph, live watches, and real-time terminal I/O further extend these capabilities.
Debugging with Ozone
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, while the target keeps running, is easy.
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 are developing a low-power device and need to know how power consumption changes when you enable or disable certain components.
Performance analysis with Ozone
Building a test farm with J-Link PRO
The J-Link PRO is ideally suited for the construction of a test farm. Also known as a board farm or a device farm, it consists of a number of boards or devices connected to a network via debug probes. It is an efficient way to share hardware, including with users in remote locations.
For any successful product, as the number of devices to be tested grows, a test farm becomes the only efficient way to ensure quality.
Using SEGGER’s Test Farm Power Adapter, the power supply of test devices can be controlled remotely. This enables automated reboot for the testing process as well as the ability to turn off devices not in use. In combination with the power-saving J-Link PRO, this makes it easy to build energy-efficient, large-scale test farms.
A J-Link PRO test farm can connect many of the same test devices or can connect completely different ones.
J-Link Test Farm setup
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.
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 (without cables) | 100mm x 53mm x 27mm |
| Weight (without cables) | 73g |
| Available interfaces | |
| 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
J-Link PRO
Ethernet cable
20-pin, 0.1″ target ribbon cable
USB cable