readback protection enabled automatically enables on nrf52840 rev3

RE: readback protection enabled automatically enables on nrf52840 rev3

SwRa — Thu, 20 Aug 2026 11:24:26 GMT

[quote user="n3rd4i"] What if the Bootloader was built against an older version (v17.0.2) does it mean also Bootloader have to be upgraded to this new version or only the application?[/quote]

Both the bootloader and application must be updated to the newer sdk version.

Best Regards,

Swathy

RE: readback protection enabled automatically enables on nrf52840 rev3

Andrei H. — Fri, 14 Aug 2026 13:13:49 GMT

Hi Swathy,

Aside from migration from v17.1.0 to v17.0.2, is there anything in particular required to be ensured for the debug feature to be enabled?

What if the Bootloader was built against an older version (v17.0.2) does it mean also Bootloader have to be upgraded to this new version or only the application?

Best regards.

RE: readback protection enabled automatically enables on nrf52840 rev3

SwRa — Fri, 14 Aug 2026 12:30:04 GMT

Hi Andrei,

You will need to use nrf-5-sdk 17.1.0 for this. Support for newer versions of the the nRF52 devices were added only in that version. It won't work on v17.0.2.

Regards,

Swathy

RE: readback protection enabled automatically enables on nrf52840 rev3

Andrei H. — Tue, 21 Jul 2026 12:55:29 GMT

Hi SwRa,

I'm using nRF5_SDK_17.0.2 (as oposed to NCS) so I do not see these options. Is there maybe another example which uses this SDK version?

Best regards

RE: readback protection enabled automatically enables on nrf52840 rev3

SwRa — Tue, 21 Jul 2026 12:04:55 GMT

Hi Andrei,

Please do refer this ticket for this: https://devzone.nordicsemi.com/f/nordic-q-a/124149/debug-port-access-port-protection-disabled-after-firmware-wrote-nrf_approtect-disable-with-0?ReplyFilter=Answers&ReplySortBy=Answers&ReplySortOrder=Descending

Best Regards,

Swathy