https://devzone.nordicsemi.com/f/nordic-q-a/79987/unable-to-program-when-powered-with-coin-cellI am using my custom board , it is usually powered with a dc supply and I can program it easily. My chip is NRF52811. When powered with a Cr2032 the segger studio says id code not detected. Is there any documented minimum requirement for input supplyen-USTelligent Community 13Fri, 24 Sep 2021 15:15:26 GMThttps://devzone.nordicsemi.com/thread/331134?ContentTypeID=1Fri, 24 Sep 2021 15:15:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:09f32073-1fcc-43bf-85f0-d49ba0c82972Turbo J<p>Measure again when programming.</p> <p>If a CR2032 is not absolutely fresh from the package, it usually drops too much down when programming via SWD.</p> <p>Input currrent is a few mA, since programming/debugging disables sleep. That is close to short circuit current on a CR2032.</p><div style="clear:both;"></div>