MPC564EVB Freescale Semiconductor, MPC564EVB Datasheet - Page 581
![KIT EVAL FOR MPC561/562/563/564](/photos/39/39/393946/mpc564evbimage_sml.jpg)
MPC564EVB
Manufacturer Part Number
MPC564EVB
Description
KIT EVAL FOR MPC561/562/563/564
Manufacturer
Freescale Semiconductor
Type
Microcontrollerr
Specifications of MPC564EVB
Contents
Module Board, Installation Guide, Power Supply, Cable, Software and more
Processor To Be Evaluated
MPC56x
Data Bus Width
32 bit
Interface Type
RS-232, Ethernet
For Use With/related Products
MPC561, 562, 563, 564
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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14.4.1
Queue 1 has priority over queue 2 execution. The following cases show the conditions under which queue
1 asserts its priority:
14.4.2
The pause feature can be used to divide queue 1 and/or queue 2 into multiple sub-queues. A sub-queue is
defined by setting the pause bit in the last CCW of the sub-queue.
Figure 14-22
shown with four CCWs in each sub-queue and queue 2 has two CCWs in each sub-queue.
Freescale Semiconductor
•
•
•
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When a queue is not active, a trigger event for queue 1 or queue 2 causes the corresponding queue
execution to begin.
When queue 1 is active and a trigger event occurs for queue 2, queue 2 cannot begin execution until
queue 1 reaches completion or the paused state. The status register records the trigger event by
reporting the queue 2 status as trigger pending. Additional trigger events for queue 2, which occur
before execution can begin, are captured as trigger overruns.
When queue 2 is active and a trigger event occurs for queue 1, the current queue 2 conversion is
aborted. The status register reports the queue 2 status as suspended. Any trigger events occurring
for queue 2 while queue 2 is suspended are captured as trigger overruns. Once queue 1 reaches the
completion or the paused state, queue 2 begins executing again. The programming of the RESUME
bit in QACR2 determines which CCW is executed in queue 2. Refer to
Register
When simultaneous trigger events occur for queue 1 and queue 2, queue 1 begins execution and
the queue 2 status is changed to trigger pending.
Queue Priority
Sub-Queues That are Paused
shows the CCW format and an example of using pause to create sub-queues. Queue 1 is
2” for more information.
MPC561/MPC563 Reference Manual, Rev. 1.2
QADC64E Enhanced Mode Operation
Section 14.3.7, “Control
14-39
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