
74
XMEGA A [MANUAL]
8077I–AVR–11/2012
6.8
Register Description
6.8.1
CHnMUX – Event Channel n Multiplexer register
Bit 7:0 – CHnMUX[7:0]: Channel Multiplexer
These bits select the event source according to
Table 6-3. This table is valid for all XMEGA devices regardless of
whether the peripheral is present or not. Selecting event sources from peripherals that are not present will give the same
result as when this register is zero. When this register is zero, no events are routed through. Manually generated events
will override CHnMUX and be routed to the event channel even if this register is zero.
Table 6-3.
CHnMUX[7:0] bit settings.
Bit
76543210
CHnMUX[7:0]
Read/Write
R/W
Initial Value
00000000
CHnMUX[7:4]
CHnMUX[3:0]
Group Configuration
Event Source
0000
0
None (manually generated events only)
0000
0
1
(Reserved)
0000
0
1
X
(Reserved)
0000
0
1
X
(Reserved)
0000
1
0
RTC_OVF
RTC overflow
0000
1
0
1
RTC_CMP
RTC compare match
0000
1
0
1
0
(Reserved)
0000
1
0
1
X
(Reserved)
0000
1
X
(Reserved)
0001
0
ACA_CH0
ACA channel 0
0001
0
1
ACA_CH1
ACA channel 1
0001
0
1
0
ACA_WIN
ACA window
0001
0
1
ACB_CH0
ACB channel 0
0001
0
1
0
ACB_CH1
ACB channel 1
0001
0
1
0
1
ACB_WIN
ACB window
0001
0
1
X
(Reserved)
0001
1
X
(Reserved)
0010
0
n
ADCA_CHn
ADCA channel n (n =0, 1, 2 or 3)
0010
0
1
n
ADCB_CHn
ADCB channel n (n=0, 1, 2 or 3)
0010
1
X
(Reserved)
0011
X
(Reserved)