Backdoor Key Verify Failed in S32k146

xiongsl — Fri, 06 Sep 2024 16:05:29 GMT

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)

Re: Backdoor Key Verify Failed in S32k146

Robin_Shen — Mon, 09 Sep 2024 06:40:57 GMT

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

Best Regards,
Robin
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Backdoor Key Verify Failed in S32k146

Re: Backdoor Key Verify Failed in S32k146