Gated Mode, Single Scan Timing - Motorola ColdFire MCF5281 User Manual

Signal Connection Considerations
When the gate closes, the active conversion completes before the queue goes idle.
When Q1 completes, both the CF1 bit sets and the SSE bit clears.
In this mode, the PF1 bit sets to reflect that a gate closing occurred before the queue
completed.
Figure 27-48 shows the timing for conversions in externally gated continuous scan mode
with the same assumptions as in Figure 27-47.
At the end of Q1,the completion flag CF1 sets and the queue restarts. If the queue starts a
second time and completes, the trigger overrun flag TOR1 sets.
TRIG1 (GATE)
EOC
QS 0
CWP LAST CCW0
CWPQ1 LAST
Q1 RES LAST
SSE
CF1
PF1
27-66
8 0
CCW1
CCW0
R0
Figure 27-47. Gated Mode, Single Scan Timing
MCF5282 User's Manual
CCW0 CCW1
CCW1 CCW0
R1 R0
8 0
CCW2 CCW3
CCW1 CCW2 CCW3
R1 R2 R3
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