KL16 Security Issue

[ScottKerstein]

Hello,

User code on KL16 runs fine; however, when security fsec is enabled, the micro reset every 1msec.  What could the problem be?

Thanks, in advance,

Scott

[tommyp · Accepted solution]

Hi All, I found the problem.  During development, the CodeWarrior flashes via ELF file.  When I attempted flashing Hex from P&E Max, the hex file failed.  I did not output all required sections, resulting in a bad image and the behavior I experienced.

Thanks!

[tommyp]

A little more info.  When secured, the reset line only goes to 2volts.  Unsecured it goes to 3.3v.

[Hui_Ma]

Hi Tom,

Could you provide more detailed info about your application software?

Which KL16 modules you are using with your application?

And do you have any Flash operation within your application?

Have a great day,
Ma Hui

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[tommyp]

I flashed a version of the code which stops at POR reset entry and does minimal init to remove any application specific issues.   I'm suspecting that the P&E debugger I'm using is not flashing properly, but since the part is secured, I have no way to confirm beyond the fact the test code is not running.  I'm using a custom trim which the P&E flashes as part of the download process (or should be).   I'm stumped.

[Hui_Ma]

I would recommend customer to unlock the KL16 chip with Segger J-Link tool.

More detailed info, please check below link:

https://community.nxp.com/thread/439921?commentID=857127#comment-857127 

Have a great day,
Ma Hui

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