Free running mode is selected. If both capture circuits are enabled, then capture circuit 0 is armed first after CAPTCTRLB[ARMB] is set. Once a capture occurs, capture circuit 0 is disarmed and capture circuit 1 is armed. After capture circuit 1 performs a capture, it is disarmed and capture circuit 0 is re-armed. The process continues indefinitely.If only one of the capture circuits is enabled, then captures continue indefinitely on the enabled capture circuit.
One shot mode is selected. If both capture circuits are enabled, then capture circuit 0 is armed first after CAPTCTRLB[ARMB] is set. Once a capture occurs, capture circuit 0 is disarmed and capture circuit 1 is armed. After capture circuit 1 performs a capture, it is disarmed and CAPTCTRLB[ARMB] is cleared. No further captures will be performed until CAPTCTRLB[ARMB] is set again.If only one of the capture circuits is enabled, then a single capture will occur on the enabled capture circuit and CAPTCTRLB[ARMB] is then cleared.