Enhanced Thermal Management; Power Trip; Thermal Trip; Case Temperature - Intel P9500 - Core 2 Duo 2.53 GHz 6M L2 Cache 1066MHz FSB Socket P Mobile Processor Manual

5.1.2

Enhanced Thermal Management

ETM is a power and thermal protection feature. On the Dual-Core Intel Itanium
processor 9000 and 9100 series, ETM uses power and thermal sensing devices on the
die to monitor entry points, indicating dangerous operation exceeding the thermal or
power specification. Once the sensing devices observe the temperature rising above
the power or thermal entry point, the processor will enter a low power mode of
execution and notify the system by sending a Correctable Machine Check Interrupt
(CMCI). The processor will remain in this low power mode until the power and
temperature decrease below the entry points and remain there for approximately one
second, at which point it will send another CMCI and resume normal operation. If the
power and temperature cannot be reduced, and continue to rise to critical levels, the
processor will assert Power Trip or Thermal Trip. The ETM feature may be disabled
through the PAL.
5.1.3

Power Trip

The Dual-Core Intel Itanium processor 9000 and 9100 series protects itself and the
MVR from catastrophic over power by use of an internal power sensor. The sensor trip
point is set above the normal operating power to ensure that there are no false trips.
The processor will signal a continuable MCA when the power draw exceeds a safe
operating level.
Warning: Data will be lost if the MVR overheats and shuts down as a result of an extended over
power condition.
Once power trip is activated, the processor can continue operation, but may continue to
signal continuable MCAs as long as the over power condition exists.
5.1.4

Thermal Trip

The Dual-Core Intel Itanium processor 9000 and 9100 series protects itself from
catastrophic overheating by use of an internal thermal sensor. The sensor trip point is
set well above the normal operating temperature to ensure that there are no false trips.
The processor will stop all execution when the junction temperature exceeds a safe
operating level.
Warning: Data will be lost if the processor goes into thermal trip (signaled to the system by the
THRMTRIP# pin).
Once thermal trip is activated, the processor remains stopped until RESET# is asserted.
The processor case temperature must drop below the specified maximum before
issuing a reset to the processor. Please see
5.2

Case Temperature

See Table 5-1
processor 9000 and 9100 series. The case temperature is defined as the temperature
measured at the center of the top surface of the IHS.
Warning: Data may be lost if the case temperature exceeds the specified maximum.
76
for the case temperature specifications for the Dual-Core Intel Itanium
Dual-Core Intel
Section 5.2 for details on case temperature.
® ®
Itanium Processor 9000 and 9100 Series Datasheet
Thermal Specifications