MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 506

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

Queued Analog-to-Digital Converter (QADC)
Advance Information
506
To prepare the QADC for a scan sequence, write to the CCW table to
specify the desired channel conversions. The criteria for queue
execution is established by selecting the queue operating mode. The
queue operating mode determines what type of trigger event starts
queue execution. A trigger event refers to any of the ways that cause the
QADC to begin executing the CCWs in a queue or subqueue. An
external trigger is only one of the possible trigger events.
A scan sequence may be initiated by:
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Freescale Semiconductor, Inc.
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
A software command
Expiration of the periodic/interval timer
An external trigger signal
An external gated signal (queue 1 only)
CONVERSION COMMAND
P — PAUSE AFTER CONVERSION
BYP — BYPASS BUFFER AMPLIFIER
IST — INPUT SAMPLE TIME
CHAN — CHANNEL NUMBER AND
BEGINNING OF QUEUE 1
BEGINNING OF QUEUE 2
P
9
WORD (CCW) TABLE
Figure 19-43. QADC Conversion Queue Operation
END OF QUEUE 1
END OF QUEUE 2
10-BIT CONVERSION COMMAND
UNTIL NEXT TRIGGER
BYP
8
Go to: www.freescale.com
END-OF-QUEUE CODE
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WORD FORMAT
[7:6]
IST
CHAN
[5:0]
CHANNEL SELECT,
A/D CONVERSION
SAMPLE, HOLD,
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
15 14 13 12 11 10
0
S
RIGHT-JUSTIFIED, UNSIGNED RESULT
LEFT-JUSTIFIED, UNSIGNED RESULT
0 0 0 0 0
LEFT-JUSTIFIED, SIGNED RESULT
10-BIT RESULT, READABLE IN
RESULT
[15:6]
[15:6]
THREE 16-BIT FORMATS
RESULT
RESULT WORD TABLE
0
0
RESULT
0 0 0 0 0
0 0 0 0 0
[9:0]
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[5:0]
[5:0]
MOTOROLA
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