I used Securechip command in J-Link to lock the Jtag port of AT91SAM7SE512; however, it didn't work consistently for me.

I had run to the program two or more times to get it secured. Did anyone have this problem before?

Is there something I missed such as some set-up in order to run this command?

Thanks for any help,



Henry

Hi Alex,



I tried a few more chips and they all had to be run several times, different numbers of runs, to secure the chip.

My process: power on , download to the chip, power off, power on, secure chip, power off.

Then I verify by downloading to the chip again and it was able to download.

Any suggestions? What should I do differently, proecss wise?



Thanks,



Henry

Hi Erik,



Thanks for following up with my request. I used the same set up and project as yours. I still couldn't secure the chip by running the command once.

I am using the AT91SAM7SE-EK eval board and J-Flash v4.68a.

The steps:

connect to target

read back chip - successful

secure chip - successful

Disconnect

Remove power, wait 1 minute

Reconnect power

connect to target

read back chip - successful. So the target is not secured.

Please see attached screenshots.



Henry