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The J-Link OB (for On-Board) is essentially a microcontroller-based, single-chip, J-Link that goes right on the evaluation board. It is compatible with, and has the same features as, J-Link BASE with reduced, but still great, performance.
The microcontroller that is used as a J-Link OB (on the left side of the evaluation board in the diagram below) has a USB-interface on its left side (facing the host) and a JTAG/SWD + SWO interface on its right side (facing the target device).
All features of J-Link BASE can be used, including download into Flash memory.
Why use a J-Link OB?
J-Link OB turns an evaluation board into a complete evaluation kit!
It adds features such as debug support and download into Flash memory, without adding significant extra cost.
Customers can fully use, test, and debug the target device (typically a microcontroller) right out of the box.
J-Link OB is compatible with most IDEs including Eclipse, GDB-based IDEs, and SEGGER Embedded Studio. For a complete list, please refer to the Supported IDEs page.
Who uses a J-Link OB?
J-Link OB is used on various evaluation boards, by several evaluation board manufacturers, for numerous target devices.
- Fully compatible with and same features as regular J-Link
- Inexpensive solution for complete evaluation kits with debug functionality
- JTAG, SWD + SWO supported
- Virtual COM Port (K22-Cortex-M, K22-Cortex-A, STM32F072
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