14.4.2.4.1 Trigger Operation

A PWM cycle starts only when it receives a SOC trigger. When the time base reaches its end, the PWM cycle completes and the PWM Generator exits a triggered state. The PWM Generator must be retriggered to continue operation, which can be done in several ways.

• The PWM Generator is self-triggered (SOCS[3:0] = 0000, default)
• A new trigger pulse is received which is coincident with the end of the PWM cycle event. This can be achieved by multiple PWM Generators having matching PGxPER values, PWM modes and PWM Output modes

The TRIG status bit (PGxSTAT[0]) indicates whether the PWM Generator is in a triggered state.

The EOC signal is the default input to the SOC trigger selection multiplexer, which allows self-triggering. The EOC trigger is generated when the PWM Generator has finished a PWM cycle. It is also generated when the ON bit (PGxCON[15]) associated with the PWM Generator has been set. This allows all PWM Generators receiving the EOC signal to start in unison when the ON bit of the host PWM Generator has been set. The ON bit of the other client PWM Generators needs to be set previously to achieve a synchronous start.