Failed to reading readback protection status for application core core

RE: Failed to reading readback protection status for application core core

gliff — Tue, 28 May 2024 22:35:00 GMT

Thanks John! This solution worked for me with a fresh-out-of-box NRF21540 DK.

RE: Failed to reading readback protection status for application core core

John — Fri, 10 May 2024 19:45:09 GMT

Oh and I suggest that this is the answer.

RE: Failed to reading readback protection status for application core core

John — Fri, 10 May 2024 19:44:27 GMT

Hmmm, my situation seemed to be more complex. I have a brand new laptop HP Spectre. It has a clean install of windows 11 latest version.

When nRFConnect for desktop was installed it produced all the errors that are mentioned above. I tried everything, change cables, change DK's multiple times.

Finally resorted to using an older machine running windiows 10 which worked fine.

I noticed when Device Manager was opened that when the DK was connected something called BULK opened up, which had a question mark beside it and complained that it had no drivers.

Hmmm, what to do?

I desided to reinstall jlink using the default parameters, that didn't work, same result as before.

Then did it again and noticed that there was an option to "Install legacy USB Drivers", which I checked.

Hooray that actually worked.

I'm hoping that no one else has to go through the grief of trying to create a brand new machine, because it won't work without this step. I would guess that successive updates to windows 11 on a preinstalled machine may be fine as the drivers may altready be installed.

Hope this helps.

RE: Failed to reading readback protection status for application core core

Luzy — Fri, 10 May 2024 07:30:33 GMT

Hi John,

I fixed it by restarting the connecter and the board.

RE: Failed to reading readback protection status for application core core

fuddymox — Fri, 10 May 2024 07:23:17 GMT

In my case, this turned out to be the CPU not being soldered down properly on the custom board. Unsure if this is a likely fault on the DK though.

RE: Failed to reading readback protection status for application core core

John — Thu, 09 May 2024 20:10:54 GMT

I have the same error

RE: Failed to reading readback protection status for application core core

Luzy — Thu, 09 May 2024 09:19:21 GMT

I meet the same error when I connect my nRF52840DK. Anyone knows how to solve it?

RE: Failed to reading readback protection status for application core core

Surya09 — Fri, 03 May 2024 15:11:13 GMT

Håkon Alseth Facing similar issue any update on this.

RE: Failed to reading readback protection status for application core core

fuddymox — Fri, 05 Apr 2024 10:32:00 GMT

Hello, was this issue resolved?

RE: Failed to reading readback protection status for application core core

Håkon Alseth — Fri, 05 Jan 2024 13:04:21 GMT

Hi,

[quote user=""]I get the following error when connecting to J-Link on some of my custom boards (about 30%)[/quote]

This is quite a high failure rate. Is this a larger production? Have you checked the soldering and current consumption of a working vs. non-working unit?

Kind regards,

Håkon