SPRUJB6B November 2024 – May 2025 AM2612
In this mode, the repeater module passes the initial trigger through to the output, and then blocks subsequent triggers until the configured number of trigger pulses (NSEL + 1) arrive. The result is that only 1 in every (NSEL + 1) pulses passes through to the output. Figure 7-131 shows an example of undersampled SOCs from multiple ePWM triggers.
This mode enables the application to scale down the trigger frequency for one or more SOCs. This is useful for charge-sharing input drivers which have increased error with higher sampling frequencies.
TRIGGER = ePWM SOCA, NSEL = 7, PHASE = 0, MODE = Undersampling, SPREAD = (don't care)
Figure 7-131 Undersampled ADC Trigger Example