SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Each PWM generator has two comparators that monitor the value of the counter; when either comparator matches the counter, they output a single-clock-cycle-width High pulse, labeled cmpA and cmpB in the figures in this chapter. When in Count-Up/Down mode, these comparators match both when counting up and when counting down, and thus are qualified by the counter direction signal. These qualified pulses are used in the PWM generation process. If either comparator match value is greater than the counter load value, then that comparator never outputs a high pulse.
Figure 21-3 shows the behavior of the counter and the relationship of these pulses when the counter is in Count-Down mode.Figure 21-4 shows the behavior of the counter and the relationship of these pulses when the counter is in Count-Up/Down mode. In these figures, the following definitions apply: