Backdoor Key Verify Failed in S32k146

[xiongsl]

Hi，

I'm trying to unlock MCU to unsecure using backdoor key but it fails, can you help me to analyze the reason, thanks!

1. I refer to the APIs in S32K1 SDK: FLASH_DRV_SecurityBypass and the return value is success!But it can't be debugged.

2. The value of 0x40C is 0xBF(0xAF)

3. JFlash using S32K146 (allow secure)

[Robin_Shen · Accepted solution]

Hi

Be careful not to let the Segger J-Link reset the MCU after unsecure using backdoor key. For more detail please refer to the discussion in Unlock flash on S32K144W from firmware

36.5.12.2.1 Un-securing the MCU using backdoor key access.png

Best Regards,
Robin
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------