MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 493

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

19.10.3 Scan Modes
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
Another pause and end-of-queue boundary condition occurs when the
pause and an end-of-queue condition occur in the same CCW. Both the
pause and end-of-queue conditions are recognized simultaneously. The
end-of-queue condition has precedence so a conversion is not
performed for the CCW and the pause flag is not set. The QADC sets the
completion flag and the queue status becomes idle. Examples of this
situation are:
The QADC queuing mechanism allows application software to utilize
different requirements for automatically scanning input channels.
In single-scan mode, a single pass through a sequence of conversions
defined by a queue is performed. In continuous-scan mode, multiple
passes through a sequence of conversions defined by a queue are
executed.
The possible modes are:
The following paragraphs describe single-scan and continuous-scan
operations.
•
•
•
•
•
•
•
•
•
•
•
Freescale Semiconductor, Inc.
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
The pause bit is set in CCW10 and EOQ is programmed into
CCW10.
During queue 1 operation, the pause bit set in CCW32, which is
also BQ2.
Disabled mode and reserved mode
Software-initiated single-scan mode
Externally triggered single-scan mode
Externally gated single-scan mode
Interval timer single-scan mode
Software-initiated continuous-scan mode
Externally triggered continuous-scan mode
Externally gated continuous-scan mode
Periodic timer continuous-scan mode
Go to: www.freescale.com
Queued Analog-to-Digital Converter (QADC)
Advance Information
Digital Control
493