2 boundary conditions, 2 boundary conditions -45, Figure 28-41 – Motorola ColdFire MCF5281 User Manual
Page 583: Show examples of all of the freeze situations
Queued Analog-to-Digital Converter (QADC)
Freescale Semiconductor
28-45
Figure 28-39. CCW Freeze Situation 17
Figure 28-40. CCW Freeze Situation 18
Figure 28-41. CCW Freeze Situation 19
28.8.2
Boundary Conditions
The queue operation boundary conditions are:
•
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.
C1
C2
T2
Q2:
CF2
C3
C4
FREEZE
T2
T2
PF2
TRIGGERS IGNORED
C1
C2
T1
Q1:
CF1
C3
C4
FREEZE
T2
C1
C2
Q2:
C3
CF2
C4
TRIGGER CAPTURED, RESPONSE DELAYED AFTER FREEZE
C1
C2
T1
Q1:
CF1
C4
FREEZE
CF2
C4
C1
C2
T2
Q2:
C3
C3
C4
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3