Watchdog

Picolo Tymo provides a hardware watchdog. Its purpose is to monitor the software application and to restart the PC after an anomalous inactivity time-out. This ensures a reliable operation of unattended systems. The Picolo Tymo watchdog is configurable.

A reset cable can be connected directly to an internal 2-pin "Watchdog" header:

The watchdog behaves as a static switch with an ON resistance of about 100Ω. The polarity at the switch input doesn't matter.

PICOLO Tymo watchdog

The above drawing illustrates the control of the PC reset by button or by the Picolo Tymo. The switch can also be used for other purposes than resetting the computer: for example, it can activate an alarm.

The two "Watchdog" headers are equivalent.