S32K148 can not download program to flash

[LSLLL]

Maybe the mcu locked,but use JLink can not unlock,the Reset Pin is grounded.The program runs normally.

[Robin_Shen]

Hi wl z,

Please read the MDM_AP status and control registers by refer the steps descripted in Unbricking S32K146.

Best Regards,
Robin
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[LSLLL]

Thanks,but now i think the debug interface can not be used,because i can not find mcu through the J-Link Commander.

[Robin_Shen]

Before input "unlock kinetis", you should follow the tips of JLink Commander( Type "connect" to establish a target connection)

[LSLLL]

Sure,I tried again and again.

[Robin_Shen]

If it's your custom board, then please check the SWD connection by refer:AN5426: Hardware Design Guidelines for S32K1xx – Application Note

If you are using S32K148EVB, have you tried to debug it with onboard OpenSDA? 

[LSLLL]

Thanks for your reply,it's my custom board,I use multimeter check the SWD connection and it's no problem.