Intel CONTROLLERS 413808 - Manual (Page 758)

Intel ® 413808 and 413812—PMON Unit
Intel ® 413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual October 2007
758 Order Number: 317805-001US
16.5.7.2 Clock Events
One of the clock events matches the frequency of the PMON unit clock. Software must
comprehend that the frequency of this PMON unit clock may be different from one
component to another. One piece of functionality this enables is to allow for event(s) to
be counted during a fixed period of time. The Clock Event that matched the PMON
Counter frequency can be used to trigger any command to execute. This essentially
allows the command trigger capability to provide a programmable timer.
For example, when needing to know how many times event AAAh occurs during
1 millisecond, start counting event AAAh at the same time as when starting to count
the PMON Counter frequency event. With a 100 MHz clock, event 001h would be
started as an EQUAL Threshold Compare against the value 000186A0h (number of 100
MHz clock ticks in 1 ms). When the threshold compare of the counted clock events is
true and therefore generates a threshold event, the threshold event triggers another
counter to stop counting event AAAh.
16.5.7.3 Threshold Events
These are the outputs of the threshold comparators. When the value in a data register
is compared to its corresponding counter value and the condition is true, a threshold
event is generated. This results in:
• Pulse on the signal lines that are routed to the events input port (one signal line
from each comparator).
• Pulse on the signal line that is routed to the PMON OUT output pin (one signal that
is an OR of all signal lines from each comparator).
One piece of functionality this enables is to allow for PMON commands to be completed
only when a Threshold Event occurs. In other words, a Threshold Event can be used as
a Command Trigger to control the execution of any PMON command (start, stop,
sample, etc.).
Table 498. Intel
®
413808 and 413812 I/O Controllers PMON Clock Events
Event Selection Code (Hex) Event Type Comment
001 XSI clock D up to 400MHz, SKU dependent
Others Reserved
Table 499. Intel
®
413808 and 413812 I/O Controllers PMON Threshold Events
Event Selection Code (Hex) Event Type Comment
010 Counter0 Threshold OD
011 Counter1 Threshold OD
012 Counter2 Threshold OD
013 Counter3 Threshold OD
014 Counter4 Threshold OD
015 Counter5 Threshold OD
016 Counter6 Threshold OD
017 Counter7 Threshold OD