PC Specifications
iPC12
- 25 -
ROTEC
technology
9.3. Watchdog Timer
The watchdog timer (WDT) is integrated in the Winbond W83627 controller of the ePanel PM and can issue a
reset to the system. The watchdog timer circuit has to be triggered within a specified time by the application
software. If the watchdog timer is not triggered because proper software execution fails or a hardware
malfunction occurs, it resets the system.
9.3.1.
Configuration
You can set the watchdog timer to Disabled, Reset or NMI. You can specify the delay time and the time-out
(trigger period) from 1 second to 30 minutes. The delay time is the time after first initialization before the
trigger period starts. The timeout is the time the watchdog timer has to be triggered within. You can make the
initialization settings in the BIOS setup.
9.3.2.
Programming
9.3.2.1.
Initialization
You can initialize the watchdog timer from the BIOS setup. You also can set up the initialization from the
application software with help of the JIDA (Jumptec Intelligent Device Architecture) programmer’s interface.
9.3.2.2.
Trigger
The watchdog needs to be triggered out of the application software within a specified timeout period. You can
only do this in the application software by using low-level programming or with help of the JIDA programmer’s
interface. For information about the JIDA programmer’s interface refer to the JIDA software package.
