S32K144 EEPROM partition error

[lengrudie]

I use S32K144-Q100 .

By default, the FlexNVM partition of the chip is 4 (that is, 64k E-Flash), but I want to change it to partition code 3 (that is, 32k E-Flash), but after using the 0x80 command, an ACCERR error is prompted. Please give me a suggestion on how to change the partition code?

Look forward to your reply.

[Robin_Shen]

Hi lengrudie,

Please read the "3.1.1.1 Program partition command requirements" of AN11983: Using the S32K1xx EEPROM Functionality – Application Note

Best Regards,
Robin
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[lengrudie]

I did not notice this information, thank you! I tried to use the erase instruction 0x44, but this instruction will also prompt an ACCERR error after it is executed. What's the matter? I hope you can give me some advice and look forward to your reply! thank you!

[Robin_Shen]

Partitioning must only be done once. Please mass erase the MCU.

[lengrudie]

When I use JLINK to execute, the chip locks and prompts "Device is secure, Erase to unsecure?"Does that mean the chip will not work?Can I solve it?

[Robin_Shen]

How did you mass erase? SEGGER J-Link Commander and J-Flash is able to mass erase. Click Yes when prompts "Device is secure, Erase to unsecure?" should also trigger mass erase. After mass erase, you should able to program the chip again. If not, please check the values of MDM-AP status and control registers by refer to: Unbricking S32K146