mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 583

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

28.8.2
The queue operation boundary conditions are:
Freescale Semiconductor
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The first CCW in a queue specifies channel 63, the end-of-queue (EOQ) code. The queue becomes
active and the first CCW is read. The end-of-queue is recognized, the completion flag is set, and
the queue becomes idle. A conversion is not performed.
BQ2 (beginning of queue 2) is set at the end of the CCW table (63) and a trigger event occurs on
queue 2. The end-of-queue condition is recognized, a conversion is performed, the completion flag
is set, and the queue becomes idle.
BQ2 is set to CCW0 and a trigger event occurs on queue 1. After reading CCW0, the end-of-queue
condition is recognized, the completion flag is set, and the queue becomes idle. A conversion is not
performed.
Boundary Conditions
Q2:
TRIGGER CAPTURED, RESPONSE DELAYED AFTER FREEZE
T2
Q1:
C1
T1
Q2:
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
C1
C2
T2
C1
C2
T2
C3
C2
Figure 28-39. CCW Freeze Situation 17
Figure 28-40. CCW Freeze Situation 18
Figure 28-41. CCW Freeze Situation 19
C3
C4
Q1:
PF2
T1
C1
TRIGGERS IGNORED
T2
C2
FREEZE
FREEZE
FREEZE
C4
Q2:
CF1
C1
Queued Analog-to-Digital Converter (QADC)
C3
T2
C2
C3
C4
C3
CF1
C4
CF2
C4
C4
CF2
CF2
28-45