14.5.3 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. This ID number corresponds to the USER register index, e.g., the EVSYS.USER2 register controls the user with ID 2.


USER #	User Name	Async/Sync	Description
0	CCLLUT0A	Async	CCL LUT0 event input A
1	CCLLUT0B	Async	CCL LUT0 event input B
2	CCLLUT1A	Async	CCL LUT1 event input A
3	CCLLUT1B	Async	CCL LUT1 event input B
4	CCLLUT2A	Async	CCL LUT2 event input A
5	CCLLUT2B	Async	CCL LUT2 event input B
6	CCLLUT3A	Async	CCL LUT3 event input A
7	CCLLUT3B	Async	CCL LUT3 event input B
8	ADC0	Async	ADC0 Trigger
9	EVOUTA	Async	EVSYS pin output A
10	EVOUTB	Async	EVSYS pin output B
11	EVOUTC	Async	EVSYS pin output C
12	EVOUTD	Async	EVSYS pin output D
13	EVOUTE	Async	EVSYS pin output E
14	EVOUTF	Async	EVSYS pin output F
15	USART0	Sync	USART0 event input
16	USART1	Sync	USART1 event input
17	USART2	Sync	USART2 event input
18	USART3	Sync	USART3 event input
19	TCA0	Sync	TCA0 event input
20	TCB0	Both	TCB0 event input
21	TCB1	Both	TCB1 event input
22	TCB2	Both	TCB2 event input
23	TCB3	Both	TCB3 event input

Name:	USER
Offset:	0x20 + n*0x01 [n=0..23]
Reset:	0x00
Property:	-


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

Describes which Event System channel the user is connected to.

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

ATmega4808/4809

14.5.3 User Channel Mux

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