2mm Adapter
The 2mm Adapter adapts from the standard 20-pin connector to a 20-pin 2 mm pitch connector.
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Overview
The 2mm Adapter is a 1:1 adapter, since the pinout of the 2 mm pitch connector is identical to the standard 20-pin connector.
Pins 14, 16, 18, 20:
On some models like the high-end model J-Link PRO, these pins may not be connected to GND but are reserved for future use/extension. In case of doubt, leave open on target hardware.