MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 482

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

Queued Analog-to-Digital Converter (QADC)
Technical Data
482
To prepare the QADC for a scan sequence, the software writes to the
CCW table to specify the desired channel conversions. The software
also establishes the criteria for initiating the queue execution by
programming the queue operating mode. The queue operating mode
determines what type of trigger event causes queue execution to begin.
A trigger event refers to any of the ways to 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
External trigger signal
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 18-44. QADC Conversion Queue Operation
END OF QUEUE 1
END OF QUEUE 2
10-BIT CONVERSION COMMAND
UNTIL NEXT TRIGGER
BYP
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END-OF-QUEUE CODE
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WORD FORMAT
[7:6]
IST
CHAN
[5:0]
CHANNEL SELECT,
A/D CONVERSION
SAMPLE, HOLD,
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
MMC2107 – Rev. 2.0
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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