MPC8544DS Freescale Semiconductor, MPC8544DS Datasheet - Page 1210

• Manufacturer Part Number: MPC8544DS
• Description: BOARD DEVELOPMENT SYSTEM 8544
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC III™r
• Type: MPUr

Specifications of MPC8544DS

• Contents: Board
• Processor To Be Evaluated: MPC8544E
• Data Bus Width: 32 bit
• Interface Type: Ethernet, I2C
• Operating Supply Voltage: - 0.3 V to + 1.1 V
• Leaded Process Compatible: Yes
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• For Use With/related Products: MPC8544
• For Use With: PPC8544EVTANG - EVAL MPC8544 783FCPBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Device Performance Monitor
20.3.3
This section describes the PMCs in detail.
20.3.3.1
PMC0–PMC9 are used to count events selected by the performance monitor local control registers. PMC0,
shown in
clock cycles. PMC0 upper represents the upper 32 bits of counter 0, and PMC0 lower represents the lower
32 bits.
20-10
21–23
24–25
26–31
Bits
Offset 0xE_101C
Reset
W
R
Figure
THRESHOLD
0
Counter Registers
TBMULT
Name
Performance Monitor Counters (PMC0–PMC9)
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Because accessing a PMC manually has priority over incrementing it due to
event counting, writing a PMC while it is counting may affect the count.
Likewise, writing a performance monitor control register while its target
counter is counting may also affect the count.
—
20-7, is associated with two 32-bit registers that form a 64-bit counter designated to count
Figure 20-7. Performance Monitor Counter Register 0 (PMC0)
Threshold and burstiness multiplier. Threshold events are counted when the event duration
exceeds a specified threshold value. The threshold is scaled based on the TBMULT
settings.TBMULT is not used to scale the threshold value for quantity threshold events. The burst
distance for burstiness counting is also scaled using the TBMULT settings. For all events that scale
the threshold, the threshold field is multiplied by the factors shown below (ranging from 1 to 128).
000 1
001 2
010 4
011 8
100 16
101 32
110 64
111 128
Reserved
Threshold. Only events whose (number of) occurrences exceed this value are counted. By varying
the threshold value, software can characterize the events subject to the threshold. For example, if
PMC2 counts eTSEC BD read latencies for which the duration exceeds the threshold, software can
obtain the distribution of eTSEC BD read latencies for a given program by monitoring the program
using various threshold values.
Table 20-6. PMLCB n Field Descriptions (continued)
PMC0 upper
NOTE
31
All zeros
0xE_1018
Description
32
PMC0 lower
Freescale Semiconductor
Access: Read/Write
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