QADC64E Enhanced Mode Operation
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
14-55
Figure 14-25. CCW Priority Situation 1
In situation S2 (
), more than one trigger event is recognized before servicing of a previous
trigger event is complete, the trigger overrun bit is again set, but otherwise, the additional trigger events
are ignored. After the queue is complete, the first newly detected trigger event causes queue execution to
begin again. When the trigger event rate is high, a new trigger event can be seen very soon after completion
of the previous queue, leaving software little time to retrieve the previous results. Also, when trigger events
are occurring at a high rate for queue 1, the lower priority queue 2 channels may not get serviced at all.
Figure 14-26. CCW Priority Situation 2
Situation S3 (
) shows that when the pause feature is in use, the trigger overrun error status bit
is set the same way, and that queue execution continues unchanged.
Q1
Q2
QS
IDLE
ACTIVE
IDLE
0000
1000
0000
0010
0000
TOR1
T1
T1
Q1:
C1
C2
C3
C4
CF1
C1
C2
C3
C4
TOR2
T2
T2
Q2:
CF2
IDLE
QADC S1
ACTIVE
IDLE
QADC S2
ACTIVE
IDLE
Q1
Q2
QS
IDLE
ACTIVE
IDLE
ACTIVE
IDLE
1000
1000
0000
0010
0000
C1
C2
C3
C4
TOR2
T2
T2
Q2:
CF2
IDLE
C1
C2
C3
C4
T1
CF1
C1
C2
C3
C4
TOR1
T1
T1
Q1:
CF1
TOR1
T1
TOR1
T1
TOR2
T2
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...