MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 525

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

19.12.2 Interrupt Sources
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
If interrupts are enabled for an event, the QADC requests interrupt
service when the event occurs. Using interrupts does not require
continuously polling the status flags to see if an event has taken place;
however, status flags must be cleared after an interrupt is serviced, in
order to remove the interrupt request
In both polled and interrupt-driven operating modes, status flags must be
re-enabled after an event occurs. Flags are re-enabled by clearing the
appropriate QASR0 bits in a particular sequence. QASR0 must first be
read, then 0s must be written to the flags that are to be cleared. If a new
event occurs between the time that the register is read and the time that
it is written, the associated flag is not cleared.
The QADC includes four sources of interrupt requests, each of which is
separately enabled. Each time the result is written for the last conversion
command word (CCW) in a queue, the completion flag for the
corresponding queue is set, and when enabled, an interrupt is
requested. In the same way, each time the result is written for a CCW
with the pause bit set, the queue pause flag is set, and when enabled,
an interrupt is requested. Refer to
The pause and complete interrupts for queue 1 and queue 2 have
separate interrupt vector levels, so that each source can be separately
serviced.
Freescale Semiconductor, Inc.
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
Go to: www.freescale.com
Queued Analog-to-Digital Converter (QADC)
Table
19-16.
Advance Information
Interrupts
525