Watchdog

Picolo Pro 3 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.

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

The watchdog uses a static switch with an ON resistance of about 35Ω. The polarity at the switch input doesn't matter.

Picolo Pro 3 watchdog

The above drawing illustrates the control of the PC reset by button or by the Picolo Pro 3. The switch can also be used for other purposes than resetting the computer: for example, it can activate an alarm.

The two "PC reset headers" are equivalent.