I've seen very few 2mm connectors used for JTAG in practice - there are 14-pin ones on some Xilinx FPGA boards, with a different pinout, and Keil's U-Link has a 2mm pitch 20-pin header with the same layout as here, which is the same as the 20-pin 0.1" pitch ARM JTAG. On this board, though, they are not, they are larger 2mm pitch connectors. However, I didn't study the pictures closely enough before purchase, and made the assumption that the "small" 10-way and 20-way JTAG connectors would be the ARM-Cortex standard 1.27mm (0.05") pitch. It looks well enough made, and has some handy un-populated jumper connections to allow you to connect to the MCU's core voltage and to fiddle with TCK and RTCK signals. The one I received was I think a later version than depicted - it has better ground planes, not so many traces on the bottom layer, no screen print on the top.
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