23.3.4.4.1 Waveform Generation

The compare channels can be used for waveform generation on the corresponding port pins. The following requirements are mandatory to make the waveform visible on the connected port pin:

Select a Waveform Generation mode by writing the Waveform Generation Mode (WGMODE) bit field in the TCEn.CTRLB register.
Enable the used compare channels (CMPnEN = ‘1’ in TCEn.CTRLB), thus overriding the output value for the corresponding pin. An alternative pin can be selected by configuring the Port Multiplexer (PORTMUX). Refer to the PORTMUX - Port Multiplexer section for details.
Optional: Enable the inverted waveform output for the associated port pin n. Refer to the PORT - I/O Pin Configuration section for details.

Table 23-2. Timer Waveform Generation Mode
WGMODE[2:0]	Group Configuration	Mode of Operation	Top	Update	OVF
000	NORMAL	Normal	PER	TOP/BOTTOM⁽¹⁾	TOP/BOTTOM⁽¹⁾
001	FRQ	Frequency	CMP0	TOP/BOTTOM⁽¹⁾	TOP/BOTTOM⁽¹⁾
010	-	Reserved	-	-	-
011	SINGLESLOPE	Single-Slope PWM	PER	BOTTOM	BOTTOM
100	-	Reserved	-	-	-
101	DSTOP	Dual-Slope PWM	PER	BOTTOM	TOP
110	DSBOTH	Dual-Slope PWM	PER	BOTTOM	TOP and BOTTOM
111	DSBOTTOM	Dual-Slope PWM	PER	BOTTOM	BOTTOM

Note: TOP for up-count and BOTTOM for down-count.