Hi all,
I found my s32k148 chip is security.I reset the chip and use j-link commander to unlock kinetis,but it doesn't work.How can I unsecure the chip? Expect your answer.Thanks a lot.
Hi zhigang,
Would you please show the image of "unlock kinetis" in J-Link Commander?
If Mass erase is enabled, you should be able to "unlock kinetis" in J-Link Commander.
Have you modify the value of Flash Configuration?
Please check the connection between S32K148 and J-Link. Are you using S32K148EVB or custom board?
Best Regards,
Robin
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Could you please try to read the MDM_AP status and control registers first.
Use J-link commander and these commands:
J-Link>r0 // pull reset pin low
J-Link>swdwritedp 2,0x01000000 // MDM_AP status register
J-Link>swdreadap 0 // Read MDM_AP status register
J-Link>swdreadap 0 // Read MDM_AP status register (has to be done 2x) Flash memory ready and Mass erase enable bits should be set
J-Link>swdreadap 1 // Read MDM_AP control register
J-Link>swdreadap 1 // Read MDM_AP control register (has to be done 2x)
J-Link>unlock Kinetis // Erase and unsecure the MCU
//J-Link>swdwriteap 1,0x1 // Launch mass erase directly, set Control[0] = 1
For more information about the register please refer to Section 56.6 MDM-AP status and control registers, S32K1xx MCU Family - Reference Manual (REV 12.1) .
You should be able to see if the MCU secured (Status[2]), if the Mass Erase operation is enabled (Status[5]) and if the Flash memory is ready (Status[1]).
