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Date of registration: Mar 15th 2018

Posts: 3


Tuesday, April 10th 2018, 4:33pm

Unable to Secure chip on a EFM32LG

I use the J-Link Flasher ARM in stand-alone mode like in UM08022 descriped. I use the "#AUTO" command via ethernet.

For me it is important to deactivate the read access after flashing the firmware. But in the stand-alone mode the flasher don't activates the lock bits.

If I test my config in the J-Flash tool with "Production Programming" everything works fine, but with the result cfg and dat file the securing works not.

Alternatively I try to set the byte by myself with the "Exit steps" options, same behavior. In the tool and via J-Link Terminal it is no problem.

It seems so that the #AUTO command stops always after verifying.


Super Moderator

Date of registration: Jan 2nd 2017

Posts: 931


Friday, April 13th 2018, 4:58pm


Thank you for your inquiry.
Autosecuring a device through the production programming option in standalone mode is currently not supported.
We are looking to add this feature for future J-Flash versions.
However you can do this by executing the necessary secure steps through the exit steps as you have tried.

The sequence you are using is incorrect. A project with the correct secure steps for that particular device is attached.
Does that solve the issue?

Best regards,
SEGGER - Nino has attached the following file:
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