SPRUIV7C May 2022 – November 2025 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
As described in Section 12.5.3.4.2, the Time Base (TB) module can be configured to operate in 3 distinct count modes:
The timing diagrams in Figure 12-334 to Figure 12-337 show how CMPA and CMPB events are generated in each of the 3 count modes and how the EPWMxSYNCI signal interacts.

Figure 12-335 EPWM Counter-Compare Events in Down-Count Mode
Figure 12-336 EPWM Counter-Compare Events in Up-Down-Count Mode, EPWM_TBCTL[13] PHSDIR = 0 Count Down on Synchronization Event
Figure 12-337 EPWM Counter-Compare Events in Up-Down-Count Mode, EPWM_TBCTL[13] PHSDIR = 1 Count Up on Synchronization Event