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KONTRON
23. Important Technology
Information
The following technological information is designed to give you
a better understanding of some of the features offered by the
coolMONSTER/PM. This information can be referenced when reading
the Appendix A: System Resource Allocations and Appendix B: BIOS
Operation sections that follow. There also are references to
additional documentation that will help you develop a better
understanding of the technical information. They are listed in
the Appendix F: PC-Architecture Information.
23.1 Max CPU Frequency setting
Kontron Embedded Modules currently offers four variants of the
coolMONSTER/PM.
They
are
the
Pentium® M versions and a 1000MHz Celeron®-M version. Additional
processor support is planned. These variants use a smart BIOS
with the capability of identifying the CPU that the module is
equipped with. Another feature of the BIOS is its ability to
offer the user the option to set the maximum CPU frequency based
on the Intel® SpeedStep® technology.
Notes:
Celeron® M processors do not support this feature.
The
different
Max
CPU
frequency
different modules are as follows:
†
800MHz:
600, 800MHz (def)
†
1000MHz: 600, 800, 1000MHz (def)
†
1800MHz: 600, 800, 1000, 1200, 1400, 1600, 1800MHz (def)
Notes:
Selecting frequencies higher then the default may cause the system to reach "Critical Trip
Point" and shutdown if a proper cooling solution is not used. Always ensure that you use
a proper cooling when selecting higher frequency settings.
Refer
to
the
Power
Menu
section
Operation chapter of this manual for more information.
coolMONSTER/PM User's Guide
57
1100MHz,
1600MHz
or
1800MHz
settings
available
for
the
in
the
Appendix
B:
BIOS
Important Technology Information
23.2 Thermal Monitor and Catastrophic
Thermal Protection
23.2.1
Thermal Monitor
The Thermal Monitor within the Pentium M processor helps to
control the processor temperature by activating the TCC (Thermal
Control Circuit) when the processor silicon reaches its maximum
operating
temperature.
The
temperature
Thermal Monitor activates the TCC is not user-configurable and
is not software visible.
The
Thermal
Monitor
controls
modulating (starting and stopping) the CPU core clocks at a 50%
duty cycle (TM1) or by initiating an Enhanced Intel SpeedStep®
technology transition (TM2*) when the processor silicon reaches
its maximum operating temperature. The mode is selectable in the
BIOS Setup Utility.
†
Maximum operating temperature activating TCC:
Notes: (*)
TM2 is the recommended mode for the Intel Pentium M processor
TM2 is not supported on boards with Celeron® M processor.
Thermal
Monitor
supports
two
Automatic
and
On-Demand
mode.
Automatic Mode must be enabled via BIOS for the processor to be
operating within specification. Automatic mode does not require
any additional hardware, software drivers, or interrupt handling
routines.
Catastrophic Thermal Protection
23.2.2
The Intel Pentium M processor supports the THERMTRIP# signal for
catastrophic thermal protection.
In the event of a catastrophic cooling failure, the processor
will automatically shut down when the silicon has reached the
absolute
maximum
temperature.
At
signal
THERMTRIP#
will
go
active.
independent of processor activity and does not generate any bus
cycles. The system will immediately shut down.
†
Absolute maximum temperature activating THERMTRIP#: 125°C
Important Technology Information
58
KONTRON
at
which
the
Intel
the
processor
temperature
by
100°C
.
modes
to
activate
the
TCC:
The
Intel
Thermal
Monitor
this
point
the
system
BUS
THERMTRIP#
activation
is
coolMONSTER/PM User's Guide
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