User`s guide

interrupt for both channels and also has the ability to share this interrupt with other devices in the system. Setting Enhanced mode in the BIOS

setup program will automatically enable Native mode as Native mode is a subset of Enhanced mode. See section 9.4.8 for more information

about this.

Running in native mode frees up interrupt resources (IRQs 14 and 15) and decreases the chance that there may be a shortage of interrupts

when installing devices.

Note

If your operating system supports native mode then congatec AG recommends you enable it.

Intel6.3

Processor Features

Thermal Monitor and Catastrophic Thermal Protection6.3.1

Intel

Celeron M processors have a thermal monitor feature that helps to control the processor temperature. The integrated TCC (Thermal

Control Circuit) activates if the processor silicon reaches its maximum operating temperature. The activation temperature, that the Intel Thermal

Monitor uses to activate the TCC, cannot be congured by the user nor is it software visible.

The Thermal Monitor can control the processor temperature through the use of two different methods dened as TM1 and TM2. TM1 method

consists of the modulation (starting and stopping) of the processor clocks at a 50% duty cycle. The TM2 method initiates an Enhanced Intel

Speedstep transition to the lowest performance state once the processor silicon reaches the maximum operating temperature.

Note

The maximum operating temperature for Intel

Celeron M processors is 100°C. TM2 mode is used for Intel

Pentium M processors, it is not

supported by Intel

Celeron M processors.

Two modes are supported by the Thermal Monitor to activate the TCC. They are called Automatic and On-Demand. No additional hardware,

software, or handling routines are necessary when using Automatic Mode.

Note

To ensure that the TCC is active for only short periods of time thus reducing the impact on processor performance to a minimum, it is necessary

to have a properly designed thermal solution. The Intel

Celeron M processor’s respective datasheet can provide you with more information

about this subject.

THERMTRIP# signal is used by Intel’s Intel

Celeron M processors for catastrophic thermal protection. If the processor’s silicon reaches a

temperature of approximately 125°C then the processor signal THERMTRIP# will go active and the system will automatically shut down to