XC886/888CLM
Analog-to-Digital Converter
User’s Manual
16-38
V1.3, 2010-02
ADC, V 1.0
16.7.3
External Trigger Control Register
Register ETRCR contains bits that select the external trigger input signal source and
enable synchronization of the external trigger input.
ETRCR
External Trigger Control Register
(CF
H
)
Reset Value: 00
H
7
6
5
4
3
2
1
0
SYNEN1
SYNEN0
ETRSEL1
ETRSEL0
rw
rw
rw
rw
Field
Bits
Type Description
ETRSELx
(x = 0 - 1)
[2:0],
[5:3]
rw
External Trigger Selection for Request Source x
This bit field defines which external trigger input
signal is selected.
000
B
The trigger input ETRx0 is selected.
001
B
The trigger input ETRx1 is selected.
010
B
The trigger input ETRx2 is selected.
011
B
The trigger input ETRx3 is selected.
100
B
The trigger input ETRx4 is selected.
101
B
The trigger input ETRx5 is selected.
110
B
The trigger input ETRx6 is selected.
111
B
The trigger input ETRx7 is selected.
SYNENx
(x = 0 - 1)
[7:6]
rw
Synchronization Enable
0
B
Synchronizing stage is not in external trigger
input REQTRx path.
1
B
Synchronizing stage is in external trigger input
REQTRx path.
*