Each CMPSS contains two comparators, two reference 12-bit DACs, two digital filters, and one ramp generator. Comparators are denoted "H" or "L" within each module, where “H” and “L” represent high and low, respectively. Each comparator generates a digital output that indicates whether the voltage on the positive input is greater than the voltage on the negative input. The positive input of the comparator can be driven from an external pin or by the PGA. The negative input can be driven by an external pin or by the programmable reference 12-bit DAC. Each comparator output passes through a programmable digital filter that can remove spurious trip signals. An unfiltered output is also available if filtering is not required. A ramp generator circuit is optionally available to control the reference 12-bit DAC value for the high comparator in the subsystem. There are two outputs from each CMPSS module. These two outputs pass through the digital filters and crossbar before connecting to the ePWM modules or GPIO pin. Figure 5-48 shows the CMPSS connectivity.
Not all packages have all CMPSS pins. See Table 5-38.