23.5.2 Control B - Normal Mode

In the FRQ and PWM Waveform Generation modes, the Compare n Enable (CMPnEN) bits will make the waveform output available on the pin corresponding to WOn, overriding the value in the corresponding PORT output register.

The Auto-Lock Update bit controls the Lock Update (LUPD) bit in the TCAn.CTRLE register. When ALUPD is written to ‘1’, the LUPD bit will be set to ‘1’ until the Buffer Valid (CMPnBV) bits of all enabled compare channels are ‘1’. This condition will clear the LUPD bit.

It will remain cleared until the following UPDATE condition, where the buffer values will be transferred to the CMPn registers, and the LUPD bit will be set to ‘1’ again. This makes sure that the CMPnBUF register values are not transferred to the CMPn registers until all enabled compare buffers are written.

This bit field selects the Waveform Generation mode and controls the counting sequence of the counter, TOP value, UPDATE condition, interrupt condition, and the type of waveform generated.

No waveform generation is performed in the Normal mode of operation. The waveform generator output will only be directed to the port pins if setting the corresponding CMPnEN bit for all other modes. The port pin direction must be set as output.