SEGGER J-Trace PRO Cortex-M
Debug & TraceDedicated Cortex-M trace probe with ETM, code coverage, and execution profiling, the entry model of the J-Trace PRO family. Available in India from GSAS with hands-on application engineering and local support.
Interface
USB 3.0 SuperSpeed
Trace
ETM, MTB, ITM, SWO, DWT
Cores
Cortex-M0 through M85
Coverage
MC/DC, branch, statement
Download
Up to 4 MB/s
Overview
About J-Trace PRO Cortex-M
The J-Trace PRO Cortex-M is the most accessible J-Trace model, delivering full trace capability for Arm Cortex-M0 through M85 microcontrollers at a competitive price. Where standard debug probes can only halt execution and inspect state at breakpoints, J-Trace captures a continuous, cycle-accurate record of every instruction executed on the target, providing a complete picture of runtime behavior that is impossible to achieve with breakpoint debugging alone.
ETM trace provides cycle-accurate, non-intrusive instruction trace that records the exact execution path of the firmware without affecting timing or behavior. This makes J-Trace indispensable for diagnosing race conditions, timing-dependent bugs, and hard faults that disappear when breakpoints are inserted. Hardware-based code coverage supports MC/DC, branch, and statement metrics for safety certification under IEC 61508, ISO 26262, and DO-178C.
Continuous trace streaming over USB 3.0 SuperSpeed handles long-running trace capture sessions without the buffer depth limitations of on-probe storage, while execution profiling identifies performance hotspots and helps optimize timing-critical firmware loops.
Trace Capabilities
| Capability | Description |
|---|---|
| ETM Trace | Cycle-accurate instruction trace, full execution history |
| MTB (Micro Trace Buffer) | Lightweight trace on Cortex-M0/M0+ with limited trace pins |
| ITM (Instrumentation Trace) | Software-instrumented event and printf trace |
| SWO | Serial Wire Output for low-bandwidth trace data |
| DWT (Data Watchpoint & Trace) | Data access trace, cycle counter, exception trace |
| Code Coverage | MC/DC, branch, statement, IEC 61508, ISO 26262, DO-178C |
| Execution Profiling | Function-level timing, hotspot identification |
| Data Trace | Monitor variable changes in real-time without halting |
| Trace Streaming | Continuous capture over USB 3.0, no buffer depth limit |
| Trace Triggering | Start/stop trace on address, data value, or event |
Full J-Link Feature Set
All J-Link features are included alongside the trace capabilities:
| Feature | Specification |
|---|---|
| Download Speed | Up to 4 MB/s |
| Host Interface | USB 3.0 SuperSpeed |
| Debug Interface | JTAG, SWD, cJTAG |
| Architectures | Arm Cortex-M0 through M85 |
| Flash Breakpoints | Unlimited |
| RTT | Real-time terminal, bidirectional |
| GDB Server | Full IDE compatibility |
| IDE Compatibility | Embedded Studio, Keil MDK, IAR EWARM, Eclipse, VS Code |
Watch the SEGGER J-Trace PRO Cortex-M introduction
The combination of full trace and standard debug in one probe means teams do not need separate devices for debug and trace workflows, the J-Trace PRO Cortex-M covers both from a single USB connection.
Blog
SEGGER Insights
SEGGER J-Link and J-Trace Now Support Andes Trace: Why This Matters for RISC-V
SEGGER's J-Link and J-Trace probes now support Andes Trace, the hybrid N-Trace plus E-Trace instruction-trace solution built into Andes RISC-V cores. Here is what Andes Trace is, why probe-level support closes one of RISC-V's last serious tooling gaps, and what it means for Indian embedded teams.
Choosing a SEGGER Flasher: Standalone vs Gang vs Secure vs Portable
Standalone, gang, secure, or portable, the SEGGER Flasher family covers four different production-programming problems, not one. Here is how Indian engineering and production teams should decide.
J-Trace PRO vs TRACE32: An Honest Comparison for India
SEGGER J-Trace PRO delivers much of the same core streaming-trace capability as Lauterbach TRACE32 for Arm Cortex-M/A/R and RISC-V targets, at a lower cost point. Here is where each platform is the stronger fit for Indian engineering teams.
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Common questions about J-Trace PRO Cortex-M
What is SEGGER J-Trace PRO used for?
Does J-Trace PRO do streaming trace or on-board buffer?
Which J-Trace PRO for Cortex-M vs Cortex-A/R vs RISC-V?
What IDEs support J-Trace PRO Cortex-M?
Interested in J-Trace PRO Cortex-M?
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