Re: [avr-gcc-list] software restart

[Volkmar Dierkes]

Hi,

On Thu, 16 Jan 2003 11:21:56 -0800 (PST), Theodore A. Roth wrote:

> On Thu, 16 Jan 2003, Sander Pool wrote:
>
> :)
> :) I you have a spare IO line can't you pull _RESET_ down whenever you like?
>
> I think you would need an external pull-up resistor for this to work since
> the IO pins are tri-stated (HI-Z) on reset. Without the pull-up, you would
> have the pin driving the RESET essentially floating, which might have
> undesirable results.

If the reset line has a internal pull up, it might be possible to 
use only this one. But I am not sure that the created impulse is 
long enough as necessary. Therefore I would recommend the usage of a 
watchdog to reset a device.

Volkmar
avr-gcc-list at http://avr1.org