How to unsecure MC9S12GA192 microcontroller?

[amitdhand]

I have been working on the hcs12 microcontroller part number mc9s12ga192. I flashed the microcontroller with wrong configuration and the microcontroller went to secure mode. Now what would be the procedure to unsecure it.

Please help out.

[RadekS · Accepted solution]

Hi Amit,

The CW debugger offers Unsecure per used debugger probe.

If you use PEmicro interfaces like USB Multilink, CyclonePro or OSBDM please go to CW debugger menu ->MultilinkCyclonePro->Unsecure…

The FCLKDIV value for default S12G clock should be selected 6.

If it not works you can use unsecure12 from P&E:

http://www.pemicro.com/downloads/download_file.cfm?download_id=16

More details about S12(X) security:

https://community.nxp.com/docs/DOC-93803

I hope it helps you.

Have a great day,
Radek

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