Skip navigation

Model Overview

The following tables show the features which are included in each J-Link / J-Trace model.

Hardware Features

Hardware features like Ethernet interface, USB full- / high-speed interface, etc. are J-Link model specific features which can not be updated or changed by software updates.

 Feature J-Link BASE J-Link PLUS J-Link ULTRA+ J-Link PRO J-Trace PRO for Cortex-M
Download speed
into RAM1
1.0 MByte/sec 1.0 MByte/sec 3.0 MByte/sec 3.0 MByte/sec 3.0 MByte/sec
Max. target interface speed 15 MHz 15 MHz 50 MHz 50 MHz 50 MHz
Max. SWO speed 30 MHz 30 MHz 100 MHz 100 MHz 100 MHz












JTAG interface






SWD interface






SWO interface






Microchip ICSP®






Renesas FINE interface






ETM Trace






ETB Trace






Unlimited Streaming Trace + Live Analysis4






Compact Model







 Optional Model      

 Not Supported

1 The download speeds listed here are the peak download speeds that can be achieved by the particular J-Link model. The actual download speed may be lower as it depends on various factors, such as, but not limited to: The selected debug interface & speed, the CPU core and its operating frequency, other devices in the JTAG chain in case JTAG is used as target interface.

Unlimited streaming trace allows to transmit trace in real-time to the PC . While traditional trace only allows to see and analyze the last xxx MB of trace data, with streaming trace it is possible to have all data available. This allows extended debugging features like code coverage, CPU load analysis based on a function basis, ...

Software Features

Software features are features implemented in the software primarily on the host. Software features can either come with the J-Link or be added later using a license string from Segger.

  J-Link BASE J-Link PLUS J-Link ULTRA+ J-Link PRO J-Trace PRO
for Cortex-M
GDB Server






Flash Download2






Unlimited Flash Breakpoints3































 Optional, an additional license is required

2 Most IDEs come with their own flashloaders, so in most cases this feature is not essential for debugging your applications in flash. The J-Link flash download (FlashDL) feature is mainly used in debug environments where the debugger does not come with an own flashloader (e.g. the GNU Debugger). For more information about flash download, please refer to Flash Download.

3 The Unlimited Flash Breakpoint feature allows setting an unlimited number of breakpoints even if the application program is not located in RAM, but in flash memory. Without this feature, the number of breakpoints which can be set in flash is limited to the number of hardware breakpoints (typically two for ARM 7/9, six for Cortex-M3). For more information about flash breakpoints, please refer to Unlimited Flash Breakpoints.

Supported Cores

Support for additional / new cores may be added to existing J-Link models with a new firmware version as far as the exisiting J-Link hardware allows it.

  J-Link BASE J-Link PLUS J-Link ULTRA+ J-Link PRO J-Trace PRO 
for Cortex-M
J-Trace PRO 
ARM legacy cores





















ARM Cortex cores
























































































































SC000 (M0 secure)







SC300 (M3 secure)









Microchip PIC32
Microchip PIC32MX







Microchip PIC32MZ







Renesas RX
Renesas RX110







Renesas RX111







Renesas RX210







Renesas RX21A







Renesas RX220







Renesas RX610







Renesas RX621







Renesas RX62G







Renesas RX62N







Renesas RX62T







Renesas RX630







Renesas RX631







Renesas RX63N







Renesas RX63T







 Debug support: Run control, memory access, etc.      

 Trace Supported

 Not supported