The continuous mode can be used to generate independent time intervals and output frequencies. Each time an interval is completed, an interrupt is generated. The next time interval is added to the TAxCCRn register in the interrupt service routine. Figure 17-6 shows two separate time intervals, t0 and t1, being added to the capture/compare registers. In this usage, the time interval is controlled by hardware, not software, without impact from interrupt latency. Up to n (where n = 0 to 6), independent time intervals or output frequencies can be generated using capture/compare registers.
Time intervals can be produced with other modes as well, where TAxCCR0 is used as the period register. Their handling is more complex since the sum of the old TAxCCRn data and the new period can be higher than the TAxCCR0 value. When the previous TAxCCRn value plus tx is greater than the TAxCCR0 data, the TAxCCR0 value must be subtracted to obtain the correct time interval.