https://devzone.nordicsemi.com/f/nordic-q-a/76289/programming-nrfjprog-programmingIm try to program using nrfjprog in BMD 350 module. After that device not responding for debug mode in segger software.en-USTelligent Community 13Mon, 14 Jun 2021 14:31:12 GMThttps://devzone.nordicsemi.com/thread/315179?ContentTypeID=1Mon, 14 Jun 2021 14:31:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2d4d510b-1755-4d6c-9b5f-33d5556f8d2aEinar Thorsrud<p>Hi,</p> <p>I cannot say what caused the issue without knowing more, but there are a few typical reasons for not being able to debug after programming:</p> <ol> <li>The hex file(s) you program enable readback protection (APPROTECT) by writing to <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/uicr.html?cp=4_2_0_13_0_61#register.APPROTECT">UICR.APPROTECT</a>. If so, you should&nbsp; be able to do a full chip erase using &quot;nrfjprog -e&quot; to recover.</li> <li>The firmware puts some GPIOs that are connected to SWDIO or SWCLK so that it prevents SWD communication. If so, you would need to make HW adjustments to recover.</li> </ol><div style="clear:both;"></div>