The Watchdog page is an interactive evaluation tool for exercising the watchdog functionality in both TRIGGER and Q&A modes. This tool uses the MSP432E microcontroller on the AEVM to create the watchdog stimulus for both correct and incorrect use cases. Status monitoring is provided to show the PMIC response.
To exercise the watchdog module please make sure the following conditions are met in the PMIC:
The watchdog page will reflect the settings in the controls section. To change from QA to TRIGGER mode, the Edit/Enable indicator, as highlighted in yellow in Figure 10-1, should be switched to Enable. Once in the trigger mode, switch back to Edit, and adjust the default Window-1 and Window-2 values to a time frame that does not exceed the limits of the AEVM.
With valid timing windows, the watchdog can be re-enabled and the watchdog sequence started.
In the EVENT STATUS view, the WD FIRST OK is illuminated and green, see Figure 10-2, indicating that the first watchdog trigger sequence was received correctly. The PMIC is continuously polled during operation and the ERROR STATUS view is updated.
To stop the evaluation, first use the control to set the RETURN TO LONGWINDOW, second switch from Enable to Edit mode, and then click STOP SEQUENCE.
The sequence configuration can be modified to intentionally provide an incorrect sequence, using the drop-down menu Sequence Configuration. The incorrect timing and the consequent bad event is shown in Figure 10-3. To evaluate this configuration, first, switch from Edit to Enable mode, second, disable the RETURN TO LONGWINDOW, and then click START SEQUENCE.
The errors can be cleared using the icons to the right of each error, or by clicking Clear All.
As previously stated, the Q&A mode can be selected when the Edit/Enable indicator is moved to Enable.
Once the Window configuration is updated for the Q&A a similar process can be employed to evaluate the Q&A mode. Figure 10-5 shows a correct sequence of answers to the questions while Figure 10-6 shows an incorrect answer.