Intel Itanium 9140M NE80567KF028009 Manuale Utente

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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.

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.

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.

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.

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 

 for details on case temperature.

See 

Table 5-1 

for the case temperature specifications for the Dual-Core Intel Itanium 

processor 9000 and 9100 series. The case temperature is defined as the temperature 
measured at the center of the top surface of the IHS. 

Data may be lost if the case temperature exceeds the specified maximum.