https://devzone.nordicsemi.com/f/nordic-q-a/54700/nrf52832-2-pin-debuggerHello, I&#39;m making a PCB project with nrf52832 and I want to use my debuggers only 2 pins(SWDCLK and SWDIO) to debug it. I have J-Link Edu, but I wonder if I can use it with the new PCB only using SWD pins. Is it possible to connect it this way and noten-USTelligent Community 13Thu, 21 Nov 2019 13:01:20 GMThttps://devzone.nordicsemi.com/thread/221330?ContentTypeID=1Thu, 21 Nov 2019 13:01:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c45850af-ecf5-4a1c-9173-6fe190a9f084Andreas<p>Hi,</p> <p>&nbsp;</p> <p>All have the 4 mentioned pins or inputs, but I suppose the Vtref and GND_detect is mainly used to set level shifters in the debugger and detect that there is a target connected. It might work to connect the Vtref to another VDD source that has the same level, and short the GND_Detect pin to ground. You will probably need your devices to share ground for this to work.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/221327?ContentTypeID=1Thu, 21 Nov 2019 12:55:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bc5e7942-b7e9-4a9d-a443-f82d6b6d9190dev_000<p>Not that I know of. You need Vtref and GND for providing references. <br />Any particular reason why you want to have just 2 pins?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/221308?ContentTypeID=1Thu, 21 Nov 2019 12:11:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:79eb3706-4a5e-4b57-878b-04c0c133f460mercimek<p>but what if I want to use only 2 pins, is there any debugger work with two pins?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/221307?ContentTypeID=1Thu, 21 Nov 2019 12:09:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bf9b948f-e88c-4a58-939a-56f7a69a8cc2dev_000<p>J-Link Edu should work fine but you would need to connect 4 wires: SWDCLK, SWDIO, VTref and GND between your custom PCB and the J-Link Edu to make it work.</p><div style="clear:both;"></div>