This mode is available for J-Link BASE, J-Link PLUS, J-Link EDU, J-Link ULTRA+ and J-Link PRO. These intelligent debug probes use a 480 Mbps high-speed USB connection to eliminate idle periods and drive the target interface at its full speed, up to 50 MHz on J-Link ULTRA+ and PRO.

"In addition to its own API and the standard GDB protocol, J-Link now supports CMSIS-DAP operation, a simple, low-level USB protocol for debug probes,” says Rolf Segger, founder of SEGGER. “While CMSIS-DAP doesn’t deliver the same performance as the J-Link protocol, it is widely supported. We decided to add support for it to make J-Link even more universal. J-Link is now the fastest CMSIS-DAP debug probe that we are aware of. One probe fits all.”

“All SEGGER products flow from the same philosophy of high-quality, reliability, speed, ease-of-use and universality,” says Ivo Geilenbrügge, Managing Director at SEGGER. “Combining J-Link with a 3rd-party or open-source program that uses CMSIS-DAP is now as simple as plug-and-play.”

Switching to CMSIS-DAP mode and back to J-Link is easily done via J-Link Configurator. While J-Link gets the most out of CMSIS-DAP, J-Link’s full performance, functionality and feature set require J-Link mode.

About J-Link

SEGGER J-Links are the most widely used line of debug probes on the market. J-Link opens the door to all major development tools, from commercial toolchains to GDB driven ones.  With features such as Real Time Transfer (RTT) for interactive user I/O in embedded applications, and High Speed Sampling (HSS) for data acquisition, J-Link is a key component of third-party utilities that provide real time system tracing and inspection.

With J-Link comes J-Scope for Real Time Data Visualization and Ozone, the J-Link debugger. Also available is SEGGER Embedded Studio for generating and downloading programs using J-Link.

For more on J-Link, and for a full list of J-Link-related tools, please visit:
www.segger.com/products/debug-probes/j-link/