The system watchdog timer (SWDT) expects certain responses from software based on timed windows and system interrupts. If the timer determines that the system has a serious problem, it asserts a system error that is routed to the PSM error accumulator module (EAM) and handled by the PSM firmware. The firmware can choose to reset part of the system, all of the system, or take other action.
The watchdog timers are described in the System Watchdog Timers chapter.