In the free-running mode of operation, the counter starts from 0x0000 and increments at each active clock
edge. When the counter reaches 0xFFFF (overflow), the counter is loaded with 0x0000 and continues
incrementing its value as shown in Figure 9-1. When the terminal count value 0xFFFF is reached, the
interrupt flag T1STAT.OVFIF is set. An interrupt request is generated if enabled, see Section 9.10 for
details. The free-running mode can be used to generate independent time intervals and output signal
frequencies.