Start-up Monitor

The start-up monitor is graphically represented by a state-device as follows:

WatchdogStartUpMonitorV16H264

Start-up monitor block diagram

The factory preset of the start-up monitor is the OFF state. When the software application sets the StartupTimeout element, the start-up monitor goes in the ARMED state. In the ARMED state, the start-up monitor waits for a new start-up sequence. The start-up monitor is able to memorize its state and the StartupTimeout element. In other words, its fully operational when power is applied, and before the launch of the software application.

The start-up monitor can be in three states: OFF, ARMED, or CNT DOWN.

OFF

In the OFF state, the start-up monitor is disabled.

ARMED

In the ARMED state, the start-up monitor is waiting for a start-up sequence to monitor. For example, the start-up monitor detects a new start-up sequence when power is applied (Power On), or a start-up sequence can be engaged following a PC reset relay closure generated by the application monitor.

CNT DOWN

The start-up monitor goes in the CNT DOWN state, and begins to count the time that elapses. Two situations may occur in the CNT DOWN state: