MMC2107 Datasheet, PDF (452/618 Pages) –

Freescale Semiconductor, Inc.
Queued Analog-to-Digital Converter (QADC)
Technical Data
452
P
00 0
0
0
1
0
0
0
1
0
P
0
0
BQ2 0
1
0
1
0
1
0
P
1
63 0
CONVERSION COMMAND
WORD (CCW) TABLE
BEGINNING OF QUEUE 1
PAUSE
PAUSE
•
•
•
END OF QUEUE 1
BEGINNING OF QUEUE 2
PAUSE
PAUSE
PAUSE
•
•
•
PAUSE
END OF QUEUE 2
CHANNEL SELECT,
SAMPLE, HOLD,
A/D CONVERSION
RESULT WORD TABLE
00
•
•
•
•
•
•
63
Figure 18-22. QADC Queue Operation with Pause
The queue operating mode selected for queue 1 determines what type
of trigger event causes the execution of each of the subqueues within
queue 1. Similarly, the queue operating mode for queue 2 determines
the type of trigger event required to execute each of the subqueues
within queue 2.
For example, when the external trigger rising edge continuous-scan
mode is selected for queue 1, and there are six subqueues within
queue 1, a separate rising edge is required on the external trigger pin
after every pause to begin the execution of each subqueue (refer to
Figure 18-22).
The choice of single-scan or continuous-scan applies to the full queue,
and is not applied to each subqueue. Once a subqueue is initiated, each
Queued Analog-to-Digital Converter (QADC)
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MMC2107 – Rev. 2.0
MOTOROLA