S12 / MagniV MicrocontrollersのトピックQuestion:Why s12x cop reset do not work?

Question:Why s12x cop reset do not work?

FAW — Fri, 15 Apr 2011 18:02:57 GMT

Hi, I have a problem with s12x ep100 reset.

I use cop reset like below:

COPCTL = 0x01;

ARMCOP = 0x00;

In s12x special mode ,the reset can work.

but in s12x normal mode, the reset can not work.

It's very strange.

Who can tell me the answers?

Thank you very much!

Re: Question:Why s12x cop reset do not work?

MikeRC — Fri, 15 Apr 2011 21:32:02 GMT

ARMCOP = 0x55;
ARMCOP = 0xAA;

Re: Question:Why s12x cop reset do not work?

kef — Fri, 15 Apr 2011 23:09:54 GMT

FAW,

You must be writing COPCTL two or more times in your code. COPCTL CRx bits are write once in normal modes. After reset only one write is allowed in normal modes, all further writes are ignored.