SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
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 24-5 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 24-5 Undersampled ADC Trigger Example