MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 1214

• Manufacturer Part Number: MPC8544COMEDEV
• Description: KIT DEV EXPRESS MPC8544COM
• Manufacturer: Freescale Semiconductor
• Type: MPUr

Specifications of MPC8544COMEDEV

• Contents: Board
• For Use With/related Products: MPC8544
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Device Performance Monitor
PMC1. This is done by appropriately setting the trigger-on select bit or trigger-off select bit
(PMLCB1[TRIGOFFSEL] or PMLCB1[TRIGONSEL]). Additionally, the condition that triggers the
counter must be selected by configuring the corresponding control bits (PMLCB1[TRIGONCNTL] or
PMLCB1[TRIGOFFCNTL]). Assuming the counter is enabled by other control register settings, the
counter increments (or freezes) when its specified event occurs after the trigger-on (or off) condition
occurs.
When trigger on and trigger off are both selected, the trigger-off condition is ignored until the trigger-on
condition has occurred. Furthermore, when a trigger-off condition occurs, the counter state is preserved; it
is not restarted by subsequent trigger-on conditions.
Triggering is disabled when the counter’s trigger-select bits specify itself as the trigger source. Similarly,
triggering is disabled when the trigger control bits are cleared.
20.4.6
The burstiness counting feature makes it easier to characterize events that occur in rapid succession
followed by a relatively long pause. As shown in
and distance.
Figure 20-10
performed for all events except threshold events.
The burstiness size field (PMLCAn[BSIZE]) specifies the minimum number of event occurrences that
constitute a burst. A burst is identified when the number of event occurrences equals or exceeds
PMLCAn[BSIZE]. Furthermore, these individual event occurrences must be separated by no more clock
cycles than the value in the burstiness granularity field (PMLCAn[BGRAN]). Note that, although a burst
is identified when the minimum number of events occurs, it is not counted until the burst sequence has
ended. A burst sequence ends when the specified burstiness granularity is exceeded, at which point the last
valid event has occurred for that sequence.
20-14
Size
Granularity The maximum time between individual events counted as members of the same burst PMLCA n [BGRAN]
Distance
Parameter
Burstiness Counting
Burst Granularity
The minimum number of events constituting a burst
The minimum time between bursts
shows the relationships between size, granularity, and distance. Burstiness counting can be
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Burst Size
Figure 20-10. Burst Size, Distance, Granularity, and Burstiness Counting
Table 20-9. Burst Definition
Event Occurrence
Description
Burst Distance
Table
20-9, event bursts are defined by size, granularity,
Burst Size
Freescale Semiconductor
PMLCA n [BSIZE]
PMLCA n [BDIST] x
PMLCB n [TBMULT]
Register Field
Time
(cycles)