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SEGGER J-Trace PRO Cortex-A/R/M

J-Trace PRO Cortex-A/R/M— The Arm Cortex trace probe

J-Trace PRO for Cortex-A/R/M-based microcontrollers supports tracing on a wide range of Arm Cortex cores.

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  1. 1.Overview
    1. 1.1.Key features
  2. 2.Debug and trace connectors
  3. 3.Supported devices
  4. 4.Software
    1. 4.1.Multi-platform
    2. 4.2.J-Flash
  5. 5.Speed
  6. 6.Flash Breakpoints
  7. 7.Ozone — The multi-platform debugger and performance analyzer
    1. 7.1.Instruction tracing
    2. 7.2.Live Code Profiling
    3. 7.3.Live Code Coverage
  8. 8.Trace reference boards
  9. 9.Media gallery
    1. 9.1.Product photos
    2. 9.2.Videos
  10. 10.Technical specifications
  11. 11.Package content
  12. 12.FAQ

Overview

SEGGER's J-Trace PRO can capture complete traces over long periods — thereby enabling the recording of infrequent, hard-to-reproduce bugs. This is particularly helpful when the program flow ‘runs off the rails’ and stops in a fault state.

It also supports extended trace features, such as Live Code Coverage (so engineers have visibility over which parts of the application code have been executed) and Live Code Profiling (providing visibility as to which instructions have been executed and how often, so hotspots can be addressed and optimization opportunities identified).

The J-Trace PRO Cortex-A/R/M provides support for Cortex-A/R/M-based microcontrollers. The SuperSpeed USB 3.0 interface of J-Trace PRO enables continuous streaming trace via USB with the full trace clock. Streaming in real time allows for data capture over long periods of time because there is no limit set on the amount of trace data. This gives you all the insight you need to develop and optimize your code.

Key features

  • Streaming trace probe with SuperSpeed USB3.0 interface and Gigabit Ethernet
  • Download speed up to 4 MB/s
  • Unlimited breakpoints in flash memory (Flash Breakpoints)
  • Use with Ozone and J-Flash
  • Real-time streaming at full System Clock
  • Fine-tune applications with Live Code Profiling
  • Instruction-level code coverage to satisfy regulatory requirements
  • Unlimited trace to isolate & identify hidden code defects
  • Supports Cortex-A/R/M targets
  • Full J-Link debug functionality

Debug and trace connectors

J-Trace connector layout

J-Trace has two connectors. The pinout of the debug and trace connector is in the SEGGER knowledge base. The debug connector is for debug only and can be used with target adapters for J-Link.

Please note, that only one connector can be used at a time!

Supported devices

SEGGER's J-Trace PRO supports tracing on a wide range of Cortex devices.

  • List of tested devices
  • List of supported cores

Core or device not listed? Please don’t hesitate to contact us.

J-Trace PRO Cortex-A/R/M: Supported devices (icon)

Software

All software is included free of charge.

For every J-Trace PRO, the J-Link Software and Documentation Package is available here:

DownloadJ-Link Software and Documentation Pack

Multi-platform

As a multi-platform solution, J-Trace PRO Cortex-A/R/M 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-Trace.

Learn more about J-Flash...

J-Trace PRO RISC-V: J-Flash (icon)

Speed

Up to 4 MB/s download speed make J-Trace PRO the fastest trace probe on the market.

Learn more about flash programming speed...

J-Trace PRO Cortex-A/R/M: Speed (icon)

Flash Breakpoints

The J-Trace PRO Cortex-A/R/M comes with an additional feature, called Unlimited Flash Breakpoints, which allows the user to set an unlimited number of breakpoints when debugging in flash memory.

Learn more about Unlimited Flash Breakpoints...

J-Link PRO: Flash Breakpoints (icon)

Ozone — The multi-platform debugger and performance analyzer

Ozone is a full-featured graphical debugger for embedded applications. It includes all well-known debug controls and information windows, and enables the best performance of J-Link debug probes and J-Trace trace probes. With Ozone it is possible to debug any embedded application on C/C++ source and assembly level. The Ozone Trace Tutorial allows developers to test the streaming and live analysis features of J-Trace PRO.

Instruction tracing

With streaming trace data users get deep insights into any application running on the target device whilst offering additional, powerful debug strategies to apply. It enables a far-reaching, yet complete, analysis of such issues, offering fast and efficient data analysis, ensuring higher productivity and also lowering development risks and costs.

More on streaming trace...


Live Code Profiling

Code profiling details which instructions have been executed and how often. Users can address application runtime hotspots and identify opportunities to optimize them. It is all about measuring the execution time and frequency of functions, blocks and instructions and highlighting where computing time is spent. These profiles can later be exported using a tool like the Ozone debugger, for documentation and analysis purposes.

More on Live Code Profiling...

J-Trace PRO Cortex-A/R/M Live Code Profiling
Live Code Profiling with J-Trace PRO

Live Code Coverage

Through Live Code Coverage, engineers gain fully accurate information about how much of a source line, block, function, or file has been executed on a target application. It is this information that makes it possible to detect code that hasn’t been covered by tests — even code that may be unreachable. This enables a fast and efficient way to improve the code or to create a suitable test suite for uncovered blocks.

More on Live Code Coverage...

J-Trace PRO Cortex-M Live Code Coverage
Live Code Coverage using J-Trace PRO and Ozone

Trace reference boards

Trace reference boards are optimal for simple and portable trace demos. These boards allow testing and verification of trace setups within minutes. They can also be used as a reference for custom hardware projects as the trace reference boards are optimized for best trace signal quality.

All trace reference boards come with an example project that runs out-of-the-box. For easy setup the boards can be powered using a J-Trace PRO V2 or later.

Overview of all trace reference boards...

Cortex-M Trace Reference Board
The Cortex-M Trace Reference Board

Media gallery

Product photos

SEGGER J-Trace PRO Cortex-A/R/M: Trace probe (photo)
J-Trace PRO Cortex-A/R/M
SEGGER J-Trace PRO Cortex-A/R/M: Trace probe (photo)
J-Trace PRO Cortex-A/R/M

Videos

Getting started with J-Trace PRO & Ozone: Streaming trace - live code coverage - live code profiling

Aug. 2020 | 10:40 min
J-Trace PRO & Ozone — Getting started

SEGGER Webinar Advanced Debugging: Streaming Instruction Trace & Real-Time Code Coverage / Profiling on ARM Cortex Microcontrollers

Jan. 2021 | 48:06 min
J-Trace PRO — Webinar

SEGGER J-Trace PRO: Live profiling and code coverage

Aug. 2016 | 1:55 min
J-Trace PRO — Live Code Profiling

SEGGER J-Trace PRO & Ozone with SAME70: Live code coverage / profiling on the microchip SAME70 using SEGGER's J-Trace PRO & Ozone

Oct. 2018 | 5:01 min
J-Trace PRO & Ozone — With SAME70

Instruction tracing and live code coverage/code profiling on the NXP i.MX RT600

Aug. 2020 | 6:47 min
J-Trace PRO — On NXP i.MX RT600

   View more...

Technical specifications

SpecificationsValue
Supported OSMicrosoft Windows (x86/x64), Linux (x86/x64/Arm), macOS (x86/Apple M1)
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)123mm x 68mm x 30mm
Weight (without cables)(without cables) 120g
Available interfaces
Ethernet interfaceGigabit
USB interfaceUSB 3.0, SuperSpeed
Target interfaceJTAG/SWD 20-pin (14-pin adapter available)
JTAG/SWD + Trace 19-pin (38-pin Mictor adapter available)
JTAG/SWD interface, electrical
Power supplyUSB-powered (max. 400mA)
Target interface voltage (VIF)1.2V ... 5V
LOW level input voltage (VIL)VIL <= 40% of VIF
HIGH level input voltage (VIH)VIH >= 60% of VIF
JTAG/SWD interface, timing
Data input rise time (Trdi)Max. 20ns
Data input fall time (Tfdi)Max. 20ns
Data output rise time (Trdo)Max. 10ns
Data output fall time (Tfdo)Max. 10ns
Clock rise time (Trc)Max. 10ns
Clock fall time (Tfc)Max. 10ns
Trace interface, electrical
Power supplyUSB-powered (max. 400mA)
Target interface voltage (VIF)1.2V ... 5V
Voltage interface low pulse (VIL)Max. 40% of VIF
Voltage interface high pulse (VIH)Min. 60% of VIF
Trace interface
Max. trace clock frequency150 MHz

Package content

J-Trace PRO Cortex-A/R/M
White Ethernet cable
Ethernet cable
20-pin, 0.5" target ribbon cable
20-pin, 0.5" target ribbon cable
20-pin, 0.1" target ribbon cable
20-pin, 0.1" target ribbon cable
Black Micro USB cable
Micro USB cable
USB 3.0 cable
USB 3.0 cable
Cortex-M Reference Board
Cortex-M Trace Reference Board

FAQ

Q:  What is the advantage of using the J-Trace PRO over other trace probes?

A:  One of the biggest advantages of the J-Trace PRO is its streaming trace capability. Streaming trace allows for continuous live trace analyses, enabling debugging for even the most complex problems.

Q:  Can I use the J-Trace PRO as a debug probe?

A:  Yes. The J-Trace PRO includes all capabilities of the J-Link debug probes and comes with all licenses, such as for Unlimited Flash Breakpoints. It can be used with the J-Link software as well as with any tool that supports the J-Link.

Q:  Can the J-Trace PRO be used with any IDE?

A:  Yes. The J-Trace PRO can be used with all common IDEs, just like any J-Link debug probe.

Q:  Can any IDE be used for tracing as well?

A:  Unfortunately most IDE vendors do not offer trace analysis features. If they do, it is only to a limited degree.

Q:  What can I use for tracing and analysis?

A:  We recommend using the graphical standalone debugger Ozone. It supports all J-Trace PRO capabilities and compliments them with its advanced analysis features. Ozone can be used independent of a compiler, with the output of any IDE or toolchain. It can also be used completely free of charge with a J-Trace PRO, even for commercial use.

Q:  What do I need in order to trace with a J-Trace PRO?

A:  Just connect the target device and start debugging. J-Trace PRO is designed to simply get working. It can be up and running in less than 10 minutes.

Q:  Where can I find trace-related troubleshooting information?

A:  Tracing is a very hardware-dependent debug technique, and some target hardware modifications or designs can cause issues when trying to set up the trace debug interface. To give our customers an easy-to-use troubleshooting platform with the most asked questions answered, we have created the following setup page: Setting up trace.

Any more questions? Please contact us.

Q:  Are there any trace example projects that I can use for orientation?

A:  Yes, every J-Trace PRO Cortex-A/R/M gets shipped with a Cortex-M Trace Reference Board. An example project is part of the J-Trace tutorial. We also created a list of tested devices that each come with an example project that runs out-of-the-box with a J-Trace PRO and Ozone. The list is available here and is updated regularly.

Q:  My device is not on the tested devices list, what can I do to get an example project for it?

A:  The trace-capable MCU market is growing and it is becoming harder to keep track of all devices. If we don't happen to have a trace example for your particular device, please feel free to contact us.

The requirements for adding a new example project are:

  • Must be supported by J-Link software: overview of supported CPUs and devices
  • The target hardware must be publicly available and an evaluation board.
  • Trace pins must be physically connected to the trace debug interface.

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