JTAG and SWD debug hardware
The following debug hardware probes and integrations are available, for direct access into Arm's CoreSight debug and trace architecture:
Maximum visibility into Arm processors, with up to 19.2 Gbps parallel trace over 32 pins, streams trace data directly to host PC, system autodetection with Development Studio and a range of target connectors including JTAG, MICTOR, and CoreSight.
JTAG or SWD debug connections to Arm-based microcontrollers running at clock speeds of up to 200 MHz. ULINKpro allows ETM trace capture at up to 800 Mbps and streaming trace direct to Keil MDK.
For simple debug over driverless USB, CMSIS-DAP provides an abstraction of the CoreSight Debug Access Port command set. The JTAG/SWD connection is incorporated into the board-level layout.
The benefits of trace
Trace is an essential tool for the resolution of complex software/hardware and timing-related issues, as it enables post-analysis of a software execution without the need for any software or hardware.
Trace can either be collected using the default parallel trace probe supplied with DSTREAM-PT or alternatively, using the DSTREAM-HT High-Speed Serial Trace Probe (HSSTP). This allows for high- bandwidth serial trace capture of up to 60 Gbps from Arm HSSTP or Marvell® SETM.
Development Studio offers advanced configuration options for collecting trace data and analysis with the Trace view. You can start focusing only on the critical sections of a program and avoid filling the trace buffer rapidly when collecting High-Speed Serial Trace.
- Use tracepoints to start and stop trace at specific points in your code
- Filter trace data types that you're interested in
- Search for timestamps, functions and instructions by addresses to sift through trace data quickly and efficiently
Debug Probes Comparison
|Debug probe family||DSTREAM family||ULINKpro family|
|Probe types||DSTREAM, DSTREAM-ST, DSTREAM-PT, DSTREAM-HT||ULINKpro, ULINKproD|
|Functionality||Debug, CoreSight trace||Debug, CoreSight trace|
|Supported target processors||All Arm Cortex and Neoverse processors
See supported devices »
|Selected devices based on Cortex-A5, Cortex-A8, Cortex-A9, Cortex-R4, Cortex-R5, any Cortex-M
See supported devices »
|Arm7, Arm9, Arm11||All||Arm 7, Arm9|
|Maximum number of cores||128 – 1022||64|
|Cores + CoreSight devices limit||254 – 1022||–|
|Debug connectivity||JTAG, SWD||JTAG, SWD|
|JTAG frequency||60 – 180 Mhz||50|
|Memory download||2.5 – 12 MB/s||3|
|External parallel trace||4 – 32 pins||Up to 4 pins|
|External serial trace||20 – 60 Gb/s||800 Mb/s|
|Trace buffer||Up to 8 GB or streamed||–|
|Host connectivity||USB 2.0, Ethernet or USB 3.0, Gigabit Ethernet||USB 2.0|
|Software requirements||Arm Development Studio
DS-5 (DSTREAM, DSTREAM-ST only)
|Arm Development Studio, Keil MDK, DS-5|