topic Re: Is there any software reset available for MC9S12ZVM ? in S12 / MagniV Microcontrollers

Is there any software reset available for MC9S12ZVM ?

ameykhatavkar — Mon, 11 Apr 2016 08:15:50 GMT

Hi team,

I want to perform controller reset while software execution is going depending upon the special condition.

I gone through the datasheet and S12Z core manual but unable to figure it out any such instruction to do so.

Please help me to resolve it.

Regards,

Amey

Re: Is there any software reset available for MC9S12ZVM ?

lama — Mon, 11 Apr 2016 09:58:58 GMT

Hi,

You can use forced COP reset for SW reset by writing different value to an ARMCOP register than sequence $AA,$55 which is used for refresh of the COP timer.

You can find an example for a similar device at https://community.freescale.com/docs/DOC-132986

Some more facts has to be taken into account. Please read https://community.freescale.com/docs/DOC-103737

Best Regards, Ladislav

Re: Is there any software reset available for MC9S12ZVM ?

ameykhatavkar — Mon, 11 Apr 2016 10:15:33 GMT

Hi Ladislav,

Thank you for reply.

Whatever you have mentioned I tried and its working.

But I want to know that, there is no direct method to do so, any assembly instruction instead of watchdog reset.

Regards,

Amey

Re: Is there any software reset available for MC9S12ZVM ?

lama — Mon, 11 Apr 2016 10:30:55 GMT

Hi Amey,

Unfortunately no.

I also use it in my applications. In the applications where COP is not used I enable COP just at the place where I need to restart the MCU and immediaty write 0x00 to ARMCOP.

Best regards,

Ladislav

Re: Is there any software reset available for MC9S12ZVM ?

ameykhatavkar — Mon, 11 Apr 2016 10:36:33 GMT

Ladislav,

Ok. Thank you.

Actually, in my application I am already using the watch dog functionality. So I want ot confirm for any other option.

Thanks for quick reply.

Regards,

Amey Khatavkar

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