MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 482

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Queued Analog-to-Digital Converter (QADC)
Advance Information
482
The situation diagrams also show when key status bits are set.
Table 19-13
Below the queue execution flows are three sets of blocks that show the
status information that is made available to the user. The first two rows
of status blocks show the condition of each queue as:
The third row of status blocks shows the 4-bit QS status register field that
encodes the condition of the two queues. Two transition status cases,
QS = 0011 and QS = 0111, are not shown because they exist only very
briefly between stable status conditions.
The first three examples in
and S3) show what happens when a new trigger event is recognized
before the queue has completed servicing the previous trigger event on
the same queue.
In situation S1
each queue while that queue is still working on the previously recognized
trigger event. The trigger overrun error status bit is set, and the
premature trigger event is otherwise ignored. A trigger event that occurs
before the servicing of the previous trigger event is through does not
disturb the queue execution in progress.
Trigger overrun
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Freescale Semiconductor, Inc.
error (TOR)
For More Information On This Product,
CF flag
PF flag
Queued Analog-to-Digital Converter (QADC)
Idle
Active
Pause
Suspended (queue 2 only)
Trigger pending
Bit
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describes the status bits.
(Figure
Set when the end of the queue is reached
Set when a queue completes execution up through a pause bit
Set when a new trigger event occurs before the queue is finished
servicing the previous trigger event
Table 19-13. Status Bits
19-23), one trigger event is being recognized on
Figure 19-23
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
Function
through
Figure 19-25
MOTOROLA
(S1, S2,