Port Override for Waveform Generation

To make the waveform generation available on the Port pins, the corresponding Port pin direction must be set as output (PORT.DIR[n]=1). The TCA will override the port pin values when the compare channel is enabled (CMPnEN=1 in TCA.CTRLB) and a waveform generation mode is selected.

The figure below shows the port override for TCA. The timer/counter compare channel will override the port pin output value (OUT) on the corresponding port pin. Enabling inverted I/O on the port pin (INVEN=1 in PORT.PINn) inverts the corresponding WG output.

Figure 1. Port Override for Timer/Counter Type A