J-Link BASE is a USB powered JTAG debug probe supporting a large number of CPU cores. Based on a 32-bit RISC CPU, it can communicate at high speed with the supported target CPUs. J-Link is used around the world in tens of thousand places for development and production (flash programming) purposes.
J-Link BASE is available in two form factors with identical function: J-Link BASE Classic and J-Link BASE Compact.
The J-Link debug probes are supported by all major IDEs including Eclipse, GDB-based IDEs and SEGGER Embedded Studio. For a complete list, please refer to Supported IDEs.
Including all models, more than 500,000 J-Links have been shipped so far, making J-Link probably the most popular debug probe for ARM cores and the de-facto standard.
|Supported OS||Microsoft Windows (x86 / x64 / Arm64),|
Linux (x86 / x64 / Arm / Arm64),
macOS (x64 / Apple M1)
|Electromagnetic compatibility (EMC)||EN 55022, EN 55024|
|Operating temperature||+5°C ... +60°C|
|Storage temperature||-20°C ... +65 °C|
|Relative humidity (non-condensing)||Max. 90% rH|
|Size of J-Link BASE Classic (without cables)||100mm x 53mm x 27mm|
|Weight of J-Link BASE Classic (without cables)||70g|
|Size of J-Link BASE Compact (without cables)||47mm x 40mm x 14mm|
|Weight of J-Link BASE Compact (without cables)||20g|
|USB interface (J-Link BASE Classic)||USB 2.0 (Hi-Speed); USB Type B|
|USB interface (J-Link BASE Compact)||USB 2.0 (Hi-Speed); Micro USB|
|Target interface||JTAG/SWD 20-pin|
|JTAG/SWD Interface, Electrical|
|Power supply||USB powered|
Max. 50mA + Target Supply current.
|Target interface voltage (VIF)||1.2V ... 5V|
|Current drawn from target voltage sense pin (VTRef)||< 25µA|
|Target supply voltage||5V (derived from USB voltage)|
|Target supply current||Max. 300mA|
|Reset type||Open drain. Can be pulled low or tristated|
|Reset low level output voltage||VOL <= 10% of VIF|
|For the whole target voltage range (1.2V <= VIF <= 5V)|
|LOW level input voltage (VIL)||VIL <= 40% of VIF|
|HIGH level input voltage (VIH)||VIH >= 60% of VIF|
|For 1.2V >= VIF <= 3.6V|
|LOW level output voltage (VOL) with a load of 10 kOhm||VOL <= 10% of VIF|
|HIGH level output voltage (VOH) with a load of 10 kOhm||VOH >= 90% of VIF|
|For 3.6 <= VIF <= 5V|
|LOW level output voltage (VOL) with a load of 10 kOhm||VOL <= 20% of VIF|
|HIGH level output voltage (VOH) with a load of 10 kOhm||VOH >= 80% of VIF|
|JTAG/SWD Interface, Timing|
|Target interface speed||Max. 15 MHz|
|SWO sampling frequency||Max. 30 MHz|
|Data input rise time (Trdi)||Trdi <= 20ns|
|Data input fall time (Tfdi)||Tfdi <= 20ns|
|Data output rise time (Trdo)||Trdo <= 10ns|
|Data output fall time (Tfdo)||Tfdo <= 10ns|
|Clock rise time (Trc)||Trc <= 3ns|
|Clock fall time (Tfc)||Trc <= 3ns|
J-Link BASE Compact explosion view
J-Link BASE Compact dimensions
The compact variant of the J-Link BASE is designed to mount securely and unobtrusively into development or end user equipment. The small size and two mounting holes enable placing the J-Link BASE Compact into existing equipment housings or to reserve space for direct-to-PCB mounting.
Typical applications are test fixtures that are used to automate firmware verification during development, or long-term test setups. It also can be used for integrated firmware reflash or service purposes inside end equipment, minimizing the number of tools that service technicians must carry around.
J-Link BASE Classic
.1" 20-pin ribbon cable
J-Link BASE Compact
.1" 20-pin ribbon cable
Micro USB cable