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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 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.
 SEGGER J-Link Flash Breakpoint Introduction | SEGGER J-Flash Introduction |
| Specification | Value |
|---|---|
| Supported OS | Microsoft Windows 2000, XP, 2003, Vista, 7 and newer (32 bit and 64 bit versions) Linux macOS 10.5 and higher |
| 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 |
| Mechanical | |
| Size (without cables) | 100mm x 53mm x 27mm |
| Weight (without cables) | 70g |
| Size compact device (without cables) | 47mm x 40mm x 14mm |
| Weight compact device (without cables) | 20g |
| Available Interfaces | |
| USB interface | USB 2.0 (High-Speed) |
| 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 |
- Supports a broad range of microcontrollers [More..]
- Supports direct download into RAM and flash memory
- Multiple CPUs supported—8051, PIC32, RX, ARM7/9/11, Cortex-M/R/A, RISC-V [More..]
- Download speed up to 1 MByte/s
- Supports unlimited breakpoints in flash memory, additional license required. [More..]
- Setting breakpoints in external flash memory of Cortex-M systems is possible with J-Link's Unlimited Flash Breakpoints technology only
- Free software updates
- Built-in VCOM functionality [More..]
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