MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 471

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

MMC2107 – Rev. 2.0
MOTOROLA
The QADC automatically performs the conversions in the queue until a
pause or an end-of-queue condition is encountered. When a pause
occurs, queue execution stops until the timer interval elapses again, and
queue execution continues. When the queue execution reaches an
end-of-queue situation, the single-scan enable bit is cleared. Software
may set the single-scan enable bit again, allowing another scan of the
queue to be initiated by the interval timer.
The interval timer generates a trigger event whenever the time interval
elapses. The trigger event may cause the queue execution to continue
following a pause, or may be considered a trigger overrun. Once the
queue execution is completed, the single-scan enable bit must be set
again to enable the timer to count again.
Normally, only one queue will be enabled for interval timer single-scan
mode and the timer will reset at the end-of-queue. However, if both
queues are enabled for either single-scan or continuous interval timer
mode, the end-of-queue condition will not reset the timer while the other
queue is active. In this case, the timer will reset when both queues have
reached end-of-queue. See
definition of interval timer reset conditions.
The interval timer single-scan mode can be used in applications which
need coherent results, for example:
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Freescale Semiconductor, Inc.
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
When it is necessary that all samples are guaranteed to be taken
during the same scan of the analog pins.
When the interrupt rate in the periodic timer continuous-scan
mode would be too high.
In sensitive battery applications, where the single-scan mode uses
less power than the software-initiated continuous-scan mode.
Go to: www.freescale.com
18.10.9 Periodic/Interval Timer
Queued Analog-to-Digital Converter (QADC)
Technical Data
Digital Control
for a
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