XC886/888CLM
Analog-to-Digital Converter
User’s Manual
16-43
V1.3, 2010-02
ADC, V 1.0
Register QSR0 contains bits that indicate the status of the sequential source.
QSR0
Queue Status Register
(CE
H
)
Reset Value: 20
H
7
6
5
4
3
2
1
0
Rsv
0
EMPTY
EV
0
FILL
r
r
rh
rh
r
rh
Field
Bits
Type Description
FILL
[1:0]
rh
Filling Level
This bit field indicates how many entries are valid in
the sequential-sourced queue. It is incremented
each time a new entry is written to QINR0,
decremented each time a requested conversion has
been finished. A new entry is ignored if the filling
level has reached its maximum value. If EMPTY bit
= 1, there are no valid entries in the queue.
00
B
If EMPTY bit = 0, there is 1 valid entry in the
queue.
01
B
If EMPTY bit = 0, there are 2 valid entries in the
queue.
10
B
If EMPTY bit = 0, there is 3 valid entry in the
queue.
11
B
If EMPTY bit = 0, there are 4 valid entries in the
queue.
EV
4
rh
Event Detected
This bit indicates that an event has been detected
while V = 1. Once set, this bit is reset automatically
when the requested conversion is started.
0
B
An event has not been detected.
1
B
An event has been detected.
EMPTY
5
rh
Queue Empty
This bit indicates if the sequential source contains
valid entries. A new entry is ignored if the queue is
filled (EMPTY = 0).
0
B
The queue is filled with 'FILL+1' valid entries in
the queue.
1
B
The queue is empty, no valid entries are
present in the queue.
*
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