MPC8544 Watchdog Timer

MPC8544 Watchdog Timer

[vinay hegde]

Hi,

I am working with Freescale MPC8544E board. I need an
information related to the functionality of hardware
watchdog provided by MPC8544 processor. 

Here is the question:

On watchdog timeout, whether the CPU can reset itself
_or_ does it assert a hardware HRESET_REQ signal to
some external hardware requesting for reset? 

Please let me know the inputs.

Thanks,
Vinay


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Re: MPC8544 Watchdog Timer

[Kumar Gala]

On Apr 26, 2007, at 3:43 AM, vinay hegde wrote:

> Hi,
>
> I am working with Freescale MPC8544E board. I need an
> information related to the functionality of hardware
> watchdog provided by MPC8544 processor.
>
> Here is the question:
>
> On watchdog timeout, whether the CPU can reset itself
> _or_ does it assert a hardware HRESET_REQ signal to
> some external hardware requesting for reset?
>
> Please let me know the inputs.

This a question best asked to Freescale support. However, I believe  
the processor will end up asserting HRESET_REQ and expects external  
board logic to reset things.

The processor core will reset itself as part of this process.

- k