Tugrul GUCLU wrote :
> I'm programming PIC18F458 to get temperatures.Problem is PIC
> resets itself

How do you know ? What are the sign of a reset ?

> but after reset it goes up from the point where it get
> reset.

And how do you know that ?

> I mean register values don't change.

What "register" ? SFR's or GPR's ?
And how do you know that the values don't change ?

There are tables in the data sheets that tells you
the "value" of the SFR's after different "kind" of resets.

And I don't think the GPR's are changed at all by a *warm* reset
(that is, without a power down/up).

> How come this be?

Well, are we realy sure of what "this" is right now ?

> Program counter gets back to 000h...

How do you know ? Anything special in your code that
"signals" a reset of the PIC to the outside ?

> but after reset it goes back where last stayed.

And what are the sign of that ?
Again, how do you know that the PIC is reset at all ?
It could just as well be that your code jumps to address
0000h, we don't know right now, do we ? We havn't even seen
the code...

WDT, Vdd-spike, brownout, code bug could be other sources
of a "reset".

Jan-Erik.

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