Intel Celeron M 440 1.86GHz BX80538440 Data Sheet

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12.5% increments. On-Demand mode can be used at the same time automatic mode is enabled, 

however, if the system tries to enable the TCC via On-Demand mode at the same time automatic 

mode is enabled and a high temperature condition exists, automatic mode will take precedence. 

An external signal, PROCHOT# (processor hot) is asserted when the processor detects that its 

temperature is above the thermal trip point. Bus snooping and interrupt latching are also active 

while the TCC is active. 

PROCHOT# will not be asserted when the processor is in the Stop-Grant, Sleep, and Deep Sleep 

low power states (internal clocks stopped), hence the thermal diode reading must be used as a 

safeguard to maintain the processor junction temperature within the 100 °C (maximum) 

specification. If the platform thermal solution is not able to maintain the processor junction 

temperature within the maximum specification, the system must initiate an orderly shutdown to 

prevent damage. If the processor enters one of the above low power states with PROCHOT# 

already asserted, PROCHOT# will remain asserted until the processor exits the low power state 

and the processor junction temperature drops below the thermal trip point. 

If automatic mode is disabled the processor will be operating out of specification. Whether the 

automatic or On-Demand modes are enabled or not, in the event of a catastrophic cooling failure, 

the processor will automatically shut down when the silicon has reached a temperature of 

approximately 125 °C. At this point the FSB signal THERMTRIP# will go active. THERMTRIP# 

activation is independent of processor activity and does not generate any bus cycles. When 

THERMTRIP# is asserted, the processor core voltage must be shut down within the time specified 

.

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