https://devzone.nordicsemi.com/f/nordic-q-a/59595/null-pointer-dereference-does-not-cause-a-hard-faultI&#39;m working with the nRF5 SDK v15.3 and a nRF52840 Dongle; developing on Keil uVision V5.29; Compiler: Armcc V5.06 While debugging I that in my programm a NULL pointer was dereferenced without the programm crashing and I am really confused about thaten-USTelligent Community 13Fri, 27 Mar 2020 13:38:35 GMThttps://devzone.nordicsemi.com/thread/242114?ContentTypeID=1Fri, 27 Mar 2020 13:38:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:754d176b-f7de-4449-a24d-09646fc92a6blorv<p>Wow ok thanks I was completly wrong about that then.</p> <p>Thank you for your clarification.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/242105?ContentTypeID=1Fri, 27 Mar 2020 13:25:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e5803ae4-5ef8-4a3f-a9e8-a3bba5a0dbebVidar Berg<p>Hello,</p> <p>NULL==0 happens to be a valid memory address (<span><a title="Memory" href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/memory.html?cp=4_0_0_3_1">Memory</a></span>). It&#39;s in FLASH memory and is where the first vector table is located and thus the first entry point after reset (true for all M4s). Writes to this address will be ignored unless you enable flash write in <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/nvmc.html?cp=4_0_0_3_2">NVMC </a>first.</p> <p>Kind regards,</p> <p>Vidar</p><div style="clear:both;"></div>