This adapter board converts the traditional 2x10 (0.1"/2.54mm pitch) JTAG cable to a narrower 2x5 (0.05"/1.27mm pitch) SWD cable, making it more convenient for connecting devices such as JTAGulator or SEGGER J-Link to mini boards with a 10-pin SWD programming connector. The breakout board features double-sided immersion gold plating, which prevents oxidation and ensures high-quality performance. It allows for programming/debugging of circuit boards using a small 10-pin 1.27mm pitch connector, offering great convenience in usage. Boundary scanning enables access to the internal signal logic state of the chip and the status of chip pins, among other things. It is compatible with ARM-USB-OCD, ARM-USB-OCD-h, ARM-USB-TINY, ARM-USB-TINY-h, as well as Segger's JLINK and other JTAG/SWD programmers/debuggers.