Unlock s32k144 timeout

[Ivan6]

Hi,

I try to modify the program start address in keil5 . when debug the program by jlink, the mcu cannot connect. I uesd another mcu is same. 

    Form community,I try to connect swd inrest pin to gnd, "unlock kinetis" always timeout.

How to fix ,thanks.

 J-link commander 

[Senlent · Accepted solution]

Hi@lvan6

please refer to fellowing document.

S32K1xx系列MCU应用指南之芯片锁死(lockup)复位原因分析与恢复方法详解 

The flash configuration field is a 16-byte section of flash memory located at 0x400-0x40F.

The cause of the chip lockup may be that you wrongly modified the link file

If the user disables mass erase with no other means to unsecure the device (no backdoor
key and no firmware means of changing the default security options), then that device
will be permanently secured.

BR!

      Jim,