SEGGER J-Trace PRO Cortex-A/R
Debug & TraceStreaming trace probe for Arm Cortex-A and Cortex-R cores with ETM, PTM, and hardware code coverage for safety-critical development. Available in India from GSAS.
Interface
USB 3.0 + Gigabit Ethernet
Trace
ETM, PTM, ETB, ITM, SWO
Cores
Cortex-A, Cortex-R
Trace Clock
Up to 150 MHz
Download
Up to 4 MB/s
Overview
About J-Trace PRO Cortex-A/R
The J-Trace PRO Cortex-A/R is the dedicated trace variant for Arm Cortex-A and Cortex-R application and real-time processors. Where Cortex-M trace probes focus on microcontroller-class targets, the Cortex-A/R variant addresses the unique challenges of tracing high-performance application processors running Linux, RTOS kernels, and safety-critical real-time firmware, capturing every instruction at full processor speed for complete execution visibility.
Cortex-A/R Trace Protocols
Cortex-A and Cortex-R cores use ETM (Embedded Trace Macrocell) and PTM (Program Trace Macrocell) trace encoders that generate significantly higher trace data rates than Cortex-M targets. The J-Trace PRO Cortex-A/R handles these rates with a 4-bit trace port running at up to 150 MHz trace clock (300 MHz TPIU frequency), streaming trace data continuously over USB 3.0 SuperSpeed to the host. ETB (Embedded Trace Buffer) readout is also supported for targets with on-chip trace buffers, providing an alternative capture path when external trace pins are unavailable.
Hardware-based code coverage extracts MC/DC, branch, and statement metrics directly from the trace stream, essential for safety certification under IEC 61508, ISO 26262, and DO-178C in automotive, industrial, and aerospace applications where Cortex-R cores are widely deployed.
Specifications
| Feature | Specification |
|---|---|
| Download Speed | Up to 4 MB/s |
| Host Interface | USB 3.0 SuperSpeed + Gigabit Ethernet |
| Debug Interface | JTAG, SWD, cJTAG |
| Max TPIU Frequency | 300 MHz |
| Max Trace Clock | 150 MHz |
| Max SWO Speed | 100 MHz |
| Trace Port | 4-bit ETM |
| Trace Protocols | ETM, PTM, ETB, ITM, SWO, DWT |
| Streaming Trace | Continuous over USB 3.0, unlimited depth |
| Code Coverage | MC/DC, branch, statement |
| Architectures | Arm Cortex-A, Cortex-R |
| Target Voltage | 1.2 V to 5 V |
| Flash Breakpoints | Unlimited |
| RTT | Real-time terminal, bidirectional |
| Dimensions | 123 x 68 x 30 mm |
| Weight | 120 g |
| IDE Compatibility | Embedded Studio, Keil MDK, IAR, Eclipse, VS Code |
The J-Trace PRO Cortex-A/R is the right choice for teams developing on Cortex-A application processors or Cortex-R safety-critical real-time systems who need full instruction trace, code coverage, and execution profiling without the overhead of software instrumentation.
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Common questions about J-Trace PRO Cortex-A/R
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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?
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