TMS570LC4357: AJSM always in SECURE

Hi,

I’m working with the TMS570LC4357 and I don't understand the AJSM module.

Last week, I developed my software and I ran it on my TMS without any problems.

But now, when I run my software (no modifications from last week) after few seconds (60s-90s), the consumption is divided by 2 and I lost the communication between the TMS and my laptop (Ethernet).

Then I would like to connect the JTAG and I realize the TMS is in SECURE mode.

Thanks to UNIFLASH, I am able to unlock it but it is entering again in SECURE mode (The powers and oscillator are good).

Could you give an explanation of how the TMS goes in secure mode itself ? Or clues to investigate this behavior?

Thank you.