Free running mode is selected. If both capture circuits are enabled, then capture circuit 0 is armed first after the ARMX bit 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 the ARMX bit 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 the ARMX bit is cleared. No further captures will be performed until the ARMX bit is set again.If only one of the capture circuits is enabled, then a single capture will occur on the enabled capture circuit and the ARMX bit is then cleared.