https://devzone.nordicsemi.com/f/nordic-q-a/73930/qspi-fail-to-write-datahello Nordic i am using nrf52840, SDK16.0, a project build on the peripheral app_ble_blinky example i am trying to use QSPI but the write function falls on error no 16 - NRFX_ERROR_INVALID_ADDR while debugging i say something strange: hereen-USTelligent Community 13Tue, 13 Apr 2021 15:01:41 GMThttps://devzone.nordicsemi.com/thread/304630?ContentTypeID=1Tue, 13 Apr 2021 15:01:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:659ce395-3b4b-40db-9718-3cb8746ea138J&#248;rgen Holmefjord<p>Hi,</p> <p>I&#39;m quite sure that the function fails on nrfx_is_word_aligned(), and not on nrfx_is_in_ram(), the hovering information from the debugger is not always correct. As you can see from your first screenshot, the address ends with 1, which is not word-aligned (should end with 0, 4, 8, or C). You should add an ALIGN keyword, for instance as described in <a href="https://devzone.nordicsemi.com/f/nordic-q-a/45687/qspi-clock-cycles-shifted/181829#181829">this post</a>.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>