The F28E12x CMPSS provides substantial enhancements over the simple analog comparator with the integrated 10-bit reference digital-to-analog (DAC) circuits found on the F2802x/03x devices. There are four CMPSS modules available on the F28E12x devices. Each module contains two comparators, two reference 12-bit DACs, and two digital filters. The CMPSS modules are useful for voltage trip monitoring, which are used in applications such as switched-mode power control and power factor correction. The module is designed around a pair of analog comparators which generates a digital output indicating if the voltage on the positive input is greater than the voltage on the negative input. The positive input to the comparator is always driven from an external pin. The negative input can be driven by either an external pin or an internal programmable 12-bit DAC as a reference voltage. Values written to the DAC can take effect immediately or be synchronized with ePWM events. Each comparator output is fed through a programmable digital filter to prevent electrical switching noise from causing spurious trip signals. The output of the CMPSS generates trip signals to the MCPWM event trigger submodule and GPIO structure. Additionally, the CMPSS features PWM blanking capability to clear-and-reset existing or imminent trip conditions near the MCPWM cycle boundaries. Also, by using the analog subsystem interconnect scheme the CMPSS comparator positive and negative input signals are independently selectable. It is noteworthy to mention that the output of DACL in CMPSS1 module can be brought out on the pin.