This is a programming cable used by the Ronetix PEEDI series of debugger/programmers.
This cable is for the 20-pin (19-pin) SWD Cortex Debug+ETM JTAG connector used by many Cortex-M3 development boards.
It can be included with the purchase of a Cortex-licensed PEEDI (or add-on programming license). Use this order page if you had ordered one of the other programming cables with your PEEDI but now want to add this one too.
Download Cortex20 Adapter Schematic