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Thermal Specifications and Design Considerations—Intel
GHz
5.1.7
FORCEPR# Signal Pin
The FORCEPR# (force power reduction) input can be used by the platform to cause the
®
Intel
Celeron
Monitor is enabled, the TCC is activated upon the assertion of the FORCEPR# signal.
The TCC remains active until the system deasserts FORCEPR#. FORCEPR# is an
asynchronous input.
FORCEPR# can be used to thermally protect other system components. Using the VR as
an example, when the FORCEPR# pin is asserted, the TCC circuit in the processor
activates reducing the current consumption of the processor and the corresponding
temperature of the VR. It should be noted that assertion of the FORCEPR# does not
automatically assert PROCHOT#. As mentioned previously, the PROCHOT# signal is
asserted when a high temperature situation is detected. A minimum pulse width of 500
µs is recommend when the FORCEPR# is asserted by the system. Sustained activation
of the FORCEPR# pin may cause noticeable platform performance degradation.
5.1.8
THERMTRIP# Signal Pin
Regardless of whether or not Thermal Monitor is enabled, in the event of a catastrophic
cooling failure, the processor automatically shuts down when the silicon has reached an
elevated temperature (refer to the THERMTRIP# definition in
the system bus signal THERMTRIP# goes active and stay active as described in
Table
11. THERMTRIP# activation is independent of processor activity and does not
generate any bus cycles.
January 2007
Order Number: 315876-002
®
Celeron
®
Processor 1.66 GHz/1.83 GHz to activate the TCC. If the Thermal
®
Processor 1.66 GHz/1.83
Table
®
®
Intel
Celeron
Processor 1.66 GHz/1.83 GHz
11). At this point,
DS
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