SEGGER Microcontroller GmbH

SEGGER J-Trace PRO Cortex-M Streaming Trace Debugger (8.18.00)

Name: SEGGER J-Trace PRO Cortex-M Streaming Trace Debugger (8.18.00)
Brand: SEGGER Microcontroller GmbH
SKU: 8.18.00
Price: 1811.95 EUR
Availability: InStock

Professional streaming trace probe for unlimited real-time ARM Cortex-M instruction tracing and live code analysis.

SKU: 8.18.00

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€1.811,95 EUR exc tax

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Overview

Image Placeholder — SEGGER J-Trace PRO Cortex-M Hardware

The J-Trace PRO Cortex-M is SEGGER's specialised streaming trace probe designed specifically for ARM Cortex-M microcontrollers. Unlike traditional trace solutions limited by internal buffer sizes, this probe enables unlimited real-time instruction tracing through SuperSpeed USB 3.0 and Gigabit Ethernet interfaces.

Where It Fits

Cortex-M Specific J-Trace PRO Cortex (Multi-Core)
All Architectures J-Trace PRO Universal

Why It Matters

Feature	Why It's Important	What You Gain
Streaming Trace	No buffer limitations	Capture months of trace data continuously
Live Analysis	Real-time insights	Debug whilst target runs at full speed
ETM Support	Complete instruction visibility	See every executed instruction with timing

Includes free Ozone debugger licence and J-Flash programming software. Compatible with all major IDEs including IAR, Keil µVision, and GCC toolchains.

Wiring Quick-Start

Host	Direction	Through	Device	Notes
USB 3.0 Port	→	USB Cable	J-Trace USB Port	SuperSpeed for streaming
Ethernet Port	→	Cat5/6 Cable	J-Trace LAN Port	Alternative connection
J-Trace Target	→	20-pin Ribbon	MCU Debug Header	JTAG/SWD signals
J-Trace Trace	→	0.05" Connector	MCU Trace Pins	ETM trace data

Code Snippet

// Cortex-M4 ETM trace setup example #define ETM_BASE 0xE0041000 #define TPIU_BASE 0xE0040000
void setup_trace(void) {
// Enable trace clock
CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;

Data format:

text
// Configure ETM for instruction trace
ETM->CR = 0x00000D1E;  // Enable ETM
ETM->TRIGGER = 0x406F; // Trigger events

// Setup TPIU for external trace
TPIU->SPPR = 0x00000002; // NRZ protocol
TPIU->ACPR = 0x0000000F; // Trace clock prescaler
}

Professional ARM Cortex-M Trace Debugging

Image Placeholder — J-Trace PRO Connected to Target Board

The SEGGER J-Trace PRO Cortex-M represents a significant advancement in ARM Cortex-M debugging technology. Unlike conventional debug probes that rely on limited internal trace buffers, this professional instrument provides unlimited streaming trace capabilities through high-speed SuperSpeed USB 3.0 and Gigabit Ethernet interfaces.

Streaming Trace Technology

Traditional trace solutions capture instruction data in finite internal buffers, typically 4-32MB, which fills rapidly at high CPU frequencies. The J-Trace PRO Cortex-M eliminates this constraint by continuously streaming trace data to the host computer in real-time. This enables capture periods extending from minutes to months without data loss.

The 64MB internal trace buffer provides temporary storage during streaming interruptions, ensuring no trace data is lost during brief USB or network disconnections.

ETM Instruction Tracing

ARM Cortex-M cores with Embedded Trace Macrocell (ETM) capability output detailed instruction execution information through dedicated trace pins. The J-Trace PRO captures this data at up to 150MHz trace clock frequencies, providing complete visibility into program execution flow.

Trace Type	Information Captured	Use Cases
Instruction Trace	Every executed instruction with timing	Program flow analysis, performance profiling
Data Trace	Memory read/write operations	Data flow debugging, cache analysis
Exception Trace	Interrupt and exception handling	RTOS debugging, timing analysis

Live Analysis Capabilities

The streaming trace architecture enables sophisticated real-time analysis whilst the target executes at full speed. The included Ozone debugger processes trace data as it arrives, providing immediate insights into system behaviour.

Live Code Profiling

Execution profiling operates continuously without target performance impact. The system identifies function execution times, call frequencies, and performance bottlenecks in real-time. Engineers can observe hotspots developing during extended test runs and optimise accordingly.

Live Code Coverage

Instruction-level code coverage monitoring tracks which portions of the application execute during testing. This feature proves essential for safety-critical applications requiring verification that all code paths have been exercised according to regulatory standards such as DO-178C or ISO 26262.

Hardware Architecture

The J-Trace PRO Cortex-M features dual high-speed interfaces for maximum flexibility. SuperSpeed USB 3.0 provides up to 5Gbps bandwidth for streaming trace data, whilst the Gigabit Ethernet interface enables remote debugging scenarios.

Image Placeholder — J-Trace PRO Block Diagram

Interface	Bandwidth	Use Case	Benefits
USB 3.0	5 Gbps	Direct PC connection	Highest bandwidth, simple setup
Gigabit Ethernet	1 Gbps	Remote debugging	Network access, isolation from EMI

Target Interface Specifications

The probe provides separate connectors for debug and trace signals. The debug connector supports standard JTAG and SWD protocols at up to 50MHz clock frequencies. The dedicated trace connector handles high-speed ETM data capture.

Debug Connector (20-pin 0.1")

JTAG: TDI, TDO, TCK, TMS, TRST
SWD: SWDIO, SWDCLK
Power: VTref, VCPout, Reset
Control: nSRST, RTCK

Trace Connector (20-pin 0.05")

Trace Clock: TRACECLK
Trace Data: TRACEDATA[3:0]
SWO: Single Wire Output
Power and Ground

Software Integration

The J-Trace PRO Cortex-M integrates seamlessly with existing development workflows. The probe operates with all major toolchains and IDEs through standard GDB remote protocol support.

Included Software

Ozone Debugger: Professional graphical debugger with trace analysis
J-Flash: High-speed flash programming utility
J-Link GDB Server: GDB remote protocol server
RTT Client: Real-Time Transfer communication tool

IDE Compatibility

Development Environment	Integration Method	Trace Support
IAR Embedded Workbench	Native plugin	Full ETM analysis
Keil µVision MDK	Native plugin	Complete trace features
Eclipse CDT	GDB remote protocol	Basic trace viewing
Visual Studio Code	Cortex-Debug extension	Trace data export

Performance Specifications

Key Performance Metrics

Maximum trace clock frequency: 150 MHz
Flash programming speed: Up to 4.0 MB/s
Target interface speed: Up to 50 MHz
SWO speed: Up to 100 MHz
Maximum CPU frequency: Unlimited

Trace Setup Example

Setting up streaming trace typically requires minimal target modifications. Most development boards expose trace pins on debug connectors.

// STM32F4 ETM configuration example void configure_etm_trace(void) { // Enable trace and debug clocks RCC->AHB1ENR |= RCC_AHB1ENR_ETMEN; CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk; // Configure trace pins (PE2-PE6) GPIOE->MODER |= (2 << 4) | (2 << 6) | (2 << 8) | (2 << 10) | (2 << 12); GPIOE->AFR |= (0 << 8) | (0 << 12) | (0 << 16) | (0 << 20) | (0 << 24); // Setup ETM for instruction trace ETM->CR = ETM_CR_ETMEN | ETM_CR_PROGBIT; ETM->TRIGGER = 0x406F; ETM->SR = 0x00000002; // Configure TPIU for parallel trace output TPIU->CSPSR = 0x00000008; // 4-bit trace port TPIU->ACPR = (SystemCoreClock / 2000000) - 1; // 2MHz trace clock TPIU->SPPR = 0x00000000; // Parallel trace protocol TPIU->FFCR = 0x00000100; // Formatter enabled }

Advanced Debugging Scenarios

The unlimited trace capture capability enables debugging scenarios impossible with traditional tools. Engineers can capture complete system execution over extended periods, then analyse the data to identify infrequent bugs or performance degradation patterns.

Hard-to-Reproduce Bug Analysis

Intermittent faults that occur after hours or days of operation can be captured and analysed. The trace data provides complete visibility into the sequence of events leading to the fault condition.

Performance Regression Testing

Long-term performance monitoring identifies gradual degradation in system performance. The live profiling features highlight when functions begin consuming excessive CPU time.

Real-Time System Analysis

RTOS-based applications benefit from complete task switching visibility. The trace data reveals scheduling behaviour, interrupt latencies, and resource contention issues.

The J-Trace PRO Cortex-M includes comprehensive example projects and tutorials to accelerate initial setup. The included Cortex-M Trace Reference Board provides an immediate evaluation platform.

Specifications for product SEGGER J-Trace PRO Cortex-M Streaming Trace Debugger (8.18.00)
General Information
Part Number (SKU)	8.18.00
Manufacturer	SEGGER Microcontroller GmbH
Physical and Mechanical
Weight	0.5 kg
Other
Warranty	12 months
Country of Origin	DE
HS Code	903090
EAN	5055383615353

Frequently Asked Questions

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What's included in the box with the J-Trace PRO Cortex-M?

The package includes the J-Trace PRO hardware, USB 3.0 cable, Ethernet cable, 20-pin 0.1" JTAG/SWD ribbon cable, 20-pin 0.05" trace cable, and software licenses for Ozone debugger and J-Flash programmer.
Is the J-Trace PRO Cortex-M compatible with multi-core systems?

This model focuses on single Cortex-M core tracing. For multi-core ARM systems or mixed architectures, consider the <a href="">J-Trace PRO Universal.
What trace analysis features does the included Ozone debugger provide?

Ozone offers live code profiling (execution timing and hotspot analysis), live code coverage (instruction-level coverage tracking), and historical trace browsing with source code correlation.
Can I debug remotely over Ethernet?

Yes, the integrated Gigabit Ethernet interface enables remote debugging across networks. This is particularly useful for accessing targets in test environments or when the development PC cannot be physically connected.
How fast is the flash programming compared to standard J-Link?

The J-Trace PRO achieves up to 4MB/s download speeds, significantly faster than standard debug probes. This reduces development iteration time when loading large applications or frequent code updates.
Do I need special target hardware modifications for trace?

Your target must expose the ETM trace pins (typically TRACECLK and TRACEDATA[3:0]) on a connector. Many development boards include these signals on debug headers. No target code modifications are required.
What's the difference between this and the regular J-Trace PRO?

The Cortex-M model is optimised specifically for Cortex-M cores and costs less than the universal J-Trace PRO. The universal model additionally supports Cortex-A, Cortex-R, and RISC-V architectures.
Can I use the J-Trace PRO Cortex-M with my existing IDE?

Yes, it integrates with all major development environments including IAR Embedded Workbench, Keil µVision, Eclipse-based IDEs, and GCC toolchains. The included Ozone debugger works independently of any IDE.
How does streaming trace differ from traditional trace buffers?

Traditional trace probes capture limited data in internal buffers (typically 4-32MB). Streaming trace continuously transfers data to the host PC via USB 3.0 or Ethernet, enabling unlimited capture periods without data loss.
What ARM Cortex-M cores does the J-Trace PRO Cortex-M support?

The probe supports all ARM Cortex-M variants including M0, M0+, M1, M3, M4, M7, M23, M33, M52, M55, and M85 cores. It works with any Cortex-M microcontroller that provides ETM trace output pins.

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SEGGER J-Trace PRO Cortex-M Streaming Trace Debugger (8.18.00)