Congatec conga-TCA 047001 Guide de l'utilisateur télécharger pdf (Page 35)

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

Atom™ D2000/N2000 series processor’s respective datasheet can provide you with

more information about this subject.

THERMTRIP# signal is used by Intel

’s Atom™ D2000/N2000 series 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 prevent any damage to the processor as a result of overheating. The THERMTRIP# signal activation is completely independent from

processor activity and therefore does not produce any bus cycles.

Note

In order for THERMTRIP# to be able to automatically switch off the system, it is necessary to use an ATX style power supply.

6.2.2 Processor Performance Control

Intel

Atom™ D2000/N2000 series

processors found on the conga-TCA run at different voltage/frequency states (performance states), which

is referred to as Enhanced Intel

SpeedStep

technology (EIST). Operating systems that support performance control take advantage of

microprocessors that use several different performance states in order to efciently operate the processor when it’s not being fully utilized.

The operating system will determine the necessary performance state that the processor should run at so that the optimal balance between

performance and power consumption can be achieved during runtime.

The Windows family of operating systems links its processor performance control policy to the power scheme setting. You must ensure that

your power scheme setting you choose has the ability to support Enhanced Intel

SpeedStep

technology.

6.3 Thermal Management

ACPI is responsible for allowing the operating system to play an important part in the system’s thermal management. This results in the

operating system having the ability to take control of the operating environment by implementing cooling decisions according to the demands

put on the CPU by the application.

The conga-TCA ACPI thermal solution offers three different cooling policies.

• Passive Cooling

When the temperature in the thermal zone must be reduced, the operating system can decrease the power consumption of the processor by

throttling the processor clock. One of the advantages of this cooling policy is that passive cooling devices (in this case the processor) do not

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Congatec conga-TCA 047001 Guide de l'utilisateur Page 35