Motorola MPC533 Reference Manual page 584

Trigger and Queue Interaction Examples
2 is considered suspended. After queue 1 is finished, queue 2 starts over with the first CCW,
when the RES (resume) control bit is set to 0. Situation S7 (Figure 14-30) shows that when
pause operation is not in use with queue 2, queue 2 suspension works the same way.
IDLE
Q1
IDLE
Q2
0000
QS
T2
Q2:
C1
IDLE
Q1
IDLE
Q2 ACTIVE
QS
0000 0010
Situations S8 and S9 (Figure 14-31 and Figure 14-32) repeat the same two situations with
the resume bit set to a one. When the RES bit is set, following suspension, queue 2 resumes
execution with the aborted CCW, not the first CCW in the queue.
14-60
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
T1
Q1:
C1 C2
T2
PF1
Q2:
ACTIVE
PAUSE
1000 0100
Figure 14-29. CCW Priority Situation 6
T1
Q1: C1 C2
PF1
C2 C1 C2
ACTIVE PAUSE
ACTIVE
SUSPEND
1010 0110
Figure 14-30. CCW Priority Situation 7
MPC533 Reference Manual
T1
C3 C4
CF1
C1 C1
C2
ACTIVE
ACTIVE
ACTIVE
SUSPEND
0110 1010
T1
C3 C4
T2 CF1
C3
PF2
ACTIVE
ACT SUSPEND
PAUSE
0101 0110 1010
RESUME=0
C2 C3 C4
CF2
IDLE
ACTIVE IDLE
0010 0000
QADC S6
C3 C4
RESUME=0
CF2
IDLE
IDLE
ACTIVE
0010 0000
QADC S7
MOTOROLA