16.5.2 Channel n Generator Selection

Each channel can be connected to one event generator. Not all generators can be connected to all channels. Refer to the table below to see which generator sources can be routed onto each channel and the generator value to be written to EVSYS.CHANNELn to achieve this routing. Writing the value 0x00 to EVSYS.CHANNELn turns the channel off.

Refer to the Peripheral Overview section for the available number of Event System channels.

Name:	CHANNELn
Offset:	0x10 + n*0x01 [n=0..9]
Reset:	0x00
Property:	-


Bit	7	6	5	4	3	2	1	0
	CHANNELn[7:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bits 7:0 – CHANNELn[7:0] Channel Generator Selection

The specific generator name corresponding to each bit group configuration is given by combining Peripheral and Output from the table below in the following way: PERIPHERAL_OUTPUT.


Generator			Async/Sync	Description	Channel Availability
Value	Name
Value	Peripheral	Output
`0x01`	UPDI	SYNCH	Sync	Rising edge of SYNCH character detection	All channels
`0x05`	MVIO	VDDIO2OK	Async	VDDIO2 OK	All channels
`0x06`	RTC	OVF	Async	Counter overflow	All channels
`0x07`		CMP		Compare match	All channels
`0x08`		PIT_DIV8192		Prescaled RTC clock divided by 8192	Even numbered channels only
`0x09`		PIT_DIV4096		Prescaled RTC clock divided by 4096
`0x0A`		PIT_DIV2048		Prescaled RTC clock divided by 2048
`0x0B`		PIT_DIV1024		Prescaled RTC clock divided by 1024
`0x08`		PIT_DIV512		Prescaled RTC clock divided by 512	Odd numbered channels only
`0x09`		PIT_DIV256		Prescaled RTC clock divided by 256
`0x0A`		PIT_DIV128		Prescaled RTC clock divided by 128
`0x0B`		PIT_DIV64		Prescaled RTC clock divided by 64
`0x10`	CCL	LUT0	Async	LUT output level	All channels
`0x11`		LUT1
`0x12`		LUT2
`0x13`		LUT3
`0x14`		LUT4⁽¹⁾
`0x15`		LUT5⁽¹⁾
`0x20`	AC0	OUT	Async	Comparator output level	All channels
`0x21`	AC1
`0x22`	AC2
`0x24`	ADC0	RESRDY	Sync	Result ready	All channels
`0x30`	ZCD0	OUT	Async	ZCD output level	All channels
`0x31`	ZCD1⁽¹⁾
`0x32`	ZCD2⁽¹⁾
`0x34`	OPAMP0	READY	Sync	OPAMP Ready	All channels
`0x35`	OPAMP1
`0x36`	OPAMP2
`0x40-0x47`	PORTA	PIN0-PIN7	Async	Pin level⁽²⁾	CHANNEL0 and CHANNEL1 only
`0x48-0x4F`	PORTB⁽¹⁾	PIN0-PIN7	Async	Pin level⁽²⁾	CHANNEL0 and CHANNEL1 only
`0x40-0x47`	PORTC	PIN0-PIN7	Async	PIN level⁽²⁾	CHANNEL2 and CHANNEL3 only
`0x48-0x4F`	PORTD	PIN0-PIN7	Async	PIN level⁽²⁾	CHANNEL2 and CHANNEL3 only
`0x40-0x47`	PORTE ⁽¹⁾	PIN0-PIN7	Async	Pin level ⁽²⁾	CHANNEL4 and CHANNEL5 only
`0x48-0x4F`	PORTF	PIN0-PIN7	Async	Pin level ⁽²⁾	CHANNEL4 and CHANNEL5 only
`0x40-0x47`	PORTG⁽¹⁾	PIN0-PIN7	Async	Pin level ⁽²⁾	CHANNEL6 and CHANNEL7 only
`0x60`	USART0	XCK	Sync	Clock signal in SPI Host mode and synchronous USART Host mode	All channels
`0x61`	USART1
`0x62`	USART2
`0x63`	USART3⁽¹⁾
`0x64`	USART4⁽¹⁾
`0x65`	USART5⁽¹⁾
`0x68`	SPI0	SCK	Sync	SPI host clock signal	All channels
`0x69`	SPI1	SCK	Sync	SPI host clock signal	All channels
`0x80`	TCA0	OVF_LUNF	Sync	Overflow/Low byte timer underflow	All channels
`0x81`		HUNF		High byte timer underflow
`0x84`		CMP0_LCMP0		Compare channel 0 match/Low byte timer compare channel 0 match
`0x85`		CMP1_LCMP1		Compare channel 1 match/Low byte timer compare channel 1 match
`0x86`		CMP2_LCMP2		Compare channel 2 match/Low byte timer compare channel 2 match
`0x88`	TCA1⁽¹⁾	OVF_LUNF	Sync	Overflow/Low byte timer underflow	All channels
`0x89`		HUNF		High byte timer underflow
`0x8C`		CMP0_LCMP0		Compare channel 0 match/Low byte timer compare channel 0 match
`0x8D`		CMP1_LCMP1		Compare channel 1 match/Low byte timer compare channel 1 match
`0x8E`		CMP2_LCMP2		Compare channel 2 match/Low byte timer compare channel 2 match
`0xA0`	TCB0	CAPT	Sync	CAPT Interrupt flag set(3)	All channels
`0xA1`	TCB0	OVF	Sync	Counter overflow	All channels
`0xA2`	TCB1	CAPT	Sync	CAPT Interrupt flag set⁽³⁾	All channels
`0xA3`	TCB1	OVF	Sync	Counter overflow	All channels
`0xA4`	TCB2	CAPT	Sync	CAPT interrupt flag set⁽³⁾	All channels
`0xA5`	TCB2	OVF	Sync	Counter overflow	All channels
`0xA6`	TCB⁽¹⁾	CAPT	Sync	CAPT interrupt flag set⁽³⁾	All channels
`0xA7`	TCB⁽¹⁾	OVF	Sync	Counter overflow	All channels
`0xA8`	TCB4⁽¹⁾	CAPT	Sync	CAPT interrupt flag set (3)	All channels
`0xA9`	TCB4⁽¹⁾	OVF	Sync	Counter overflow	All channels
`0xB0`	TCD0	CMPBCLR	Async	Counter matches CMPBCLR	All channels
`0xB1`		CMPASET		Counter matches CMPASET
`0xB2`		CMPBSET		Counter matches CMPBSET
`0xB3`		PROGEV		Programmable event output

Note:

Not all peripheral instances are available for all pin-counts. Refer to the Peripherals and Architecture section for details.
Event from the PORT pin will be zero if the input driver is disabled.
The operational mode of the timer decides when the CAPT flag is raised. See the 16-bit Timer/Counter Type B (TCB) section for details.