5. Module: PWM

When using a PWM Control Input (PCI) to trigger a time base capture, the Capture Status flag, CAP (PGxSTAT[5]), may not set again under certain conditions. When a subsequent PWM capture event occurs while, or just after, reading the current capture value from the PGxCAP register, the Capture Status flag, CAP, will not be set again.

Read the PWM Generator Capture (PGxCAP, x = 1 to 8) register at a known time to avoid this condition. The timing of the PGxCAP read operation can be scheduled by using the PWM Generator x (1-8) interrupt or any of the six PWM Event (A-F) interrupts corresponding to the PCI event that triggered the time base capture. Read the PGxCAP value after the CAP bit has set within the interrupt.