Kinetis Device is Locked. Do you want to unlock it? Mass erase will be executed. MK60DX256VLL10

[hfabbasi]

I am using MK60DX256VLL10 in a circuit. After soldering the controller onto the designed board, I tried to download my code into the controller using Ulink Pro Debugger using Keil MDK. But i encounter "Kinetis Device is Locked. Do you want to unlock it? Mass erase will be executed" to which I press OK. After few seconds, "Invalid ROM table" appears and erase is not performed. 

To be cear, the same code is used in another board where same controller is used and in that board, I am able to doanload my code wihtout any "lock isssue" or "invalid rom table" issue.

[jingpan]

Hi @hfabbasi ,

Maybe the chip isn't really locked. There is some soldering issue or hardware problem. Please refer to this guide.

Regards,

Jing

[hfabbasi]

Your suggested document is very thorough. It really helped me to understand the problem I am facing. Regarding unlocking the chip, I want your help in unlocking my device. I have "Keil ULINKpro" debugger hardware which I am using with "Keil MDK IDE" or "NXP MCUXpresso IDE" software. I dont have "J Link/ FLasher" hardware which is being in your suggested pdf document. So, how "Keil ULINKpro" debugger hardware can be used with "Keil MDK IDE" or "NXP MCUXpresso IDE" software to unlock my device? 

[jingpan]

Hi @hfabbasi ,

Please refer to this link.

https://developer.arm.com/documentation/ka003053/latest

But if the problem is caused by hardware or other issue, it won't help.

Regards,

Jing