Segger J-link - info and articles

• AN00021 - connecting J-link to certain Discovery boards
• Segger J-link and SWD
• Segger J-link and SWD on FRDM-K22F

The Hackaday article below is interesting, as Rolf Segger chimes in in the comment section.

• Hackaday: Unbricking a Segger