XC886/888CLM
Analog-to-Digital Converter
User’s Manual
16-36
V1.3, 2010-02
ADC, V 1.0
16.7.2
Priority and Arbitration Register
Register PRAR contains bits that define the request source priority and the conversion
start mode. It also contains bits that enable/disable the conversion request treatment in
the arbitration slots.
PRAR
Priority and Arbitration Register
(CC
H
)
Reset Value: 00
H
7
6
5
4
3
2
1
0
ASEN1
ASEN0
0
ARBM
CSM1
PRIO1
CSM0
PRIO0
rw
rw
r
rw
rw
rw
rw
rw
Field
Bits
Type Description
PRIO0
0
rw
Priority of Request Source 0
This bit defines the priority of the sequential request
source 0.
0
B
Low priority
1
B
High priority
CSM0
1
rw
Conversion Start Mode of Request Source 0
This bit defines the conversion start mode of the
sequential request source 0.
0
B
The wait-for-start mode is selected.
1
B
The cancel-inject-repeat mode is selected.
PRIO1
2
rw
Priority of Request Source 1
This bit defines the priority of the parallel request
source 1.
0
B
Low priority
1
B
High priority
CSM1
3
rw
Conversion Start Mode of Request Source 1
This bit defines the conversion start mode of the
parallel request source 1.
0
B
The wait-for-start mode is selected.
1
B
The cancel-inject-repeat mode is selected.
ARBM
4
rw
Arbitration Mode
This bit defines which arbitration mode is selected.
0
B
Permanent arbitration (default).
1
B
Arbitration started by pending conversion
request
*