15.5.3 User Channel MUX

Each event user can be connected to one channel and several users can be connected to the same channel. The following table lists all Event System users with their corresponding user ID number and name. The user name is given by combining USER with Peripheral and Input from the table below in the following way: USERPERIPHERALINPUT.


USER			Async/Sync	Description
#	Name
#	Peripheral	Input
`0x00`	CCL	LUT0A	Async	CCL LUT0 event input A
`0x01`		LUT0B		CCL LUT0 event input B
`0x02`		LUT1A		CCL LUT1 event input A
`0x03`		LUT1B		CCL LUT1 event input B
`0x04`		LUT2A		CCL LUT2 event input A
`0x05`		LUT2B		CCL LUT2 event input B
`0x06`		LUT3A		CCL LUT3 event input A
`0x07`		LUT3B		CCL LUT3 event input B
`0x08`	ADC0	START	Async	ADC start on event
`0x09`	EVSYS	EVOUTA	Async	EVSYS pin output A
`0x0A`		EVOUTB		EVSYS pin output B
`0x0B`		EVOUTC⁽¹⁾		EVSYS pin output C
`0x0C`	USART0	IRDA	Sync	USART0 IrDA event input
`0x0D`	USART1	IRDA	Sync	USART1 IrDA event input
`0x0E`	TCA0	CNTA	Sync	Count on event or control count direction
`0x0F`	TCA0	CNTB	Sync	Restart on event or control count direction
`0x11`	TCB0	CAPT	Both⁽²⁾	Start, stop, capture, restart or clear counter
`0x12`	TCB0	COUNT	Sync	Count on event
`0x13`	TCB1	CAPT	Both⁽²⁾	Start, stop, capture, restart or clear counter
`0x14`	TCB1	COUNT	Sync	Count on event

Note:

Not all peripheral instances are available for all pin counts. Refer to the Peripherals and Architecture section for details.
Depends on the timer operational mode.

Name:	USER
Offset:	0x20 + n*0x01 [n=0..19]
Reset:	0x00
Property:	-


Bit	7	6	5	4	3	2	1	0
	USER[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 – USER[7:0] User Channel Selection

Configures which Event System channel the user is connected to.

Value	Description
0	OFF, no channel is connected to this Event System user
n	The event user is connected to CHANNEL(n-1)

ATtiny3224/3226/3227

15.5.3 User Channel MUX

Bits 7:0 – USER[7:0] User Channel Selection