PCA10040 dk flash entire erase after linked to jlinkhttps://devzone.nordicsemi.com/f/nordic-q-a/128577/pca10040-dk-flash-entire-erase-after-linked-to-jlinkI&#39;m developing with PCA10040 DK(3.0.0 2022.10), the IDE is SES for ARM 5.42a. The app is normal after download the application. After a reset or power off and restart, the program works fine. Once I connect the PCA10040 DK with the J-Link on board toen-USTelligent Community 13Mon, 29 Jun 2026 09:57:16 GMTRE: PCA10040 dk flash entire erase after linked to jlinkhttps://devzone.nordicsemi.com/thread/568530?ContentTypeID=1Mon, 29 Jun 2026 09:57:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1dd2f7e-2aac-468e-a399-a1576912b7cdVidar Berg<p>Hello,</p> <p>This version&nbsp;of the nRF52 DK has revision 3 of the nRF52832 with a hardened readback protection mechanism, see&nbsp;<a href="https://nrfconnectdocs.nordicsemi.com/pdf/IN/in_142_v1.1.pdf">https://nrfconnectdocs.nordicsemi.com/pdf/IN/in_142_v1.1.pdf</a>&nbsp;and it&nbsp;is only nRF5 SDK v17.1.0 that supports this revision out of the box. Perhaps you are you using an older SDK? The jlink tools will prompt you to erase the chip if they detect that AP protection is enabled.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>