參數(shù)資料
型號(hào): QADCRM
英文描述: Queued Analog-to-Digital Converter Reference Manual
中文描述: 排隊(duì)模擬到數(shù)字轉(zhuǎn)換器參考手冊(cè)
文件頁數(shù): 90/122頁
文件大?。?/td> 940K
代理商: QADCRM
MOTOROLA
9-4
QUEUE PRIORITY EXAMPLES
QADC
REFERENCE MANUAL
The next two situations consider trigger events that occur for the lower priority queue
2, while queue 1 is actively being serviced.
Figure 9-4
shows that a queue 2 trigger event that is recognized while queue 1 is ac-
tive, is saved, and as soon as queue 1 is finished, queue 2 servicing begins.
Figure 9-4 CCW Priority Situation 4
Situation S5 (
Figure 9-5
) shows that when multiple queue 2 trigger events are detect-
ed while queue 1 is busy, the trigger overrun error bit is set, but queue 1 execution is
not disturbed. Situation S5 also shows that the effect of queue 2 trigger events during
queue 1 execution is the same when the pause feature is in use in either queue.
Figure 9-5 CCW Priority Situation 5
QADC S4
Q1
Q2
QS
IDLE
IDLE
ACTIVE
IDLE
0000
1000
0010
ACTIVE
0000
C1
C2
C3
C4
T1
Q1:
CF1
Q2:
C1
C2
C3
C4
T2
CF2
IDLE
1011
TRIGGERED
QADC S5
Q1
Q2
QS
IDLE
IDLE
IDLE
0000
1000
0010
ACTIVE
0000
C1
C2
T1
Q1:
C1
C2
PF2
C3
C4
C3
C4
CF2
IDLE
1011
TRIG
Q2:
T2
T2
PF1
PAUSE
ACTIVE
PAUSE
TOR1
T2
T2
CF1
TOR1
T1
ACTIVE
TRIG
0110
ACTIVE
0101
1001
1011
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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