21.3.3.1.2 Time-Out Check Mode
In this mode, the counter counts to MAX and wraps
around. On the first edge the counter is restarted and on the second
edge, the counter is stopped. If the count register (TCBn.CNT)
reaches TOP before the second edge, an interrupt will be generated.
In Freeze state, the counter will restart on a new edge. Reading
count (TCBn.CNT) or compare/capture (TCBn.CCMP) register, or writing
run bit (RUN in TCBn.STATUS) in Freeze state will have no
effect.