Segger Microcontroller Systems

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Segger Microcontroller is a private company involved in the embedded systems industry.^[1] It provides products used to develop and manufacture four categories of embedded systems: real-time operating systems (RTOS) and software libraries (middleware), debugging and trace probes, programming tools (integrated development environment (IDE), compiler, linker), and in-system programmers (Flasher line of products). The company is headquartered in Monheim am Rhein, Germany, with remote offices in Gardner, Massachusetts; Milpitas, California; and Shanghai, China.

Segger Microcontroller was founded in 1992 by Rolf Segger in

In the following table, the top group are trace devices, the bottom group are educational / hobbyist devices.

J-Trace & J-Link Models^[6][7]

Model	Host USB speed	Host Ethernet speed	Host Wi-Fi type	Target voltage range	Target Trace connector (pins, pitch)	Target Debug connector (pins, pitch)	Target download speed (max)	Target VCOM UART	Segger software features	Photo
J-Trace PRO (ARM & RISC-V)	3.0 SS	1 Gbit/s	None	1.2V to 5V	19-pins, 1.27mm (150  MHz )	20-pins, 2.54mm (50  MHz )	4 MByte /s	None	All
J-Trace PRO Cortex-A/R/M	3.0 SS	1 Gbit/s	None	1.2V to 5V	19-pins, 1.27mm (150 MHz)	20-pins, 2.54mm (50 MHz)	4 MByte/s	None	All
J-Trace PRO Cortex-M	3.0 SS	1 Gbit/s	None	1.2V to 5V	19-pins, 1.27mm (150 MHz)	20-pins, 2.54mm (50 MHz)	4 MByte/s	None	All
J-Trace PRO RISC-V	3.0 SS	1 Gbit/s	None	1.2V to 5V	19-pins, 1.27mm (150 MHz)	20-pins, 2.54mm (50 MHz)	4 MByte/s	None	All
J-Link PRO PoE	2.0 HS	100 Mbit/s (PoE )	None	1.2V to 5V	None	20-pins, 2.54mm (50  MHz )	4 MByte/s	2-pins (10M)	All
J-Link PRO	2.0 HS	100 Mbit/s	None	1.2V to 5V	None	20-pins, 2.54mm (50 MHz)	4 MByte/s	2-pins (10M)	All
J-Link ULTRA+	2.0 HS	None	None	1.2V to 5V	None	20-pins, 2.54mm (50 MHz)	4 MByte/s	2-pins (10M)	All
J-Link WiFi	2.0 HS	None	802.11b/g/n (2.4 GHz )	1.2V to 5V	None	20-pins, 2.54mm (15  MHz )	1 MByte/s	2-pins (115.2K)	All
J-Link PLUS, J-Link PLUS Compact	2.0 HS	None	None	1.2V to 5V	None	20-pins, 2.54mm (15 MHz)	1 MByte/s	2-pins (115.2K)	All
J-Link BASE, J-Link BASE Compact	2.0 HS	None	None	1.2V to 5V	None	20-pins, 2.54mm (15 MHz)	1 MByte/s	2-pins (115.2K)	Limited
J-Link EDU (discontinued)	2.0 HS	None	None	1.2V to 5V	None	20-pins, 2.54mm (15  MHz )	1 MByte/s	2-pins (115.2K)	Limited
J-Link EDU Mini	2.0 FS	None	None	3.3V	None	9-pins, 1.27mm (4 MHz)	0.2 MByte/s	None	Limited
J-Link OB (on board)	2.0 FS	None	None	Depends	None	Integrated on dev board (2 to 4 MHz)	0.1 to 0.2 MByte/s	Depends	Limited

• Note: Further models are J-Link LITE ARM, J-Link LITE CortexM, J-Link LITE RX, J-Link OEM.[8]
• Note: Software options vary by model: J-Flash, J-Flash-SPI, Ozone, RDDI, RDI, Unlimited Flash Breakponts.
• Note: The EDU & EDU Mini models cannot be used for commercial software development, also doesn't come with J-Flash, J-Flash-SPI, RDDI, RDI options.
• Note: Adapters and isolators are available to convert the 20-pin 0.1"/2.54mm male shrouded (box) header to another target board connector.^[9]
• Note: The compact variants are functionally identical to the standard variants

• Embedded system
• Single-board microcontroller
• List of ARM microprocessor cores
• GNU Debugger

Wikimedia Commons has media related to Segger.

• Official website