To double the number of timers and PWM channels in the TCA, a Split Mode is provided. In this Split Mode, the 16-bit timer/counter acts as two separate 8-bit timers, which each have three compare channels for PWM generation. The split mode will only work with single slope down count. Split Mode does not support Event action controlled operation.
When shifting between Normal Mode and Split Mode, the functionality of some registers and bits change, but their values do not. For this reason, disabling the peripheral (ENABLE=0 in TCA.CTRLA) and doing a Hard Reset (CMD=RESET in TCA.CTRLESET) is recommended when changing the mode to avoid unexpected behavior.
The counter will start counting clock ticks according to the prescaler setting in the Clock Select bit field (CLKSEL) in TCA.CTRLA.
Activating Split Mode results in changes to the functionality of some registers and register bits. The modifications are described in a separate register map.