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Thermal Specifications
138
Intel
®
Itanium
®
Processor 9300 Series and 9500 Series Datasheet
will continue to drive THERMTRIP_N and remain stopped. It is recommended to allow
the processor case temperature to drop below the specified design target before issuing
a reset to the processor. Please see
for details on the case
temperature.
Note:
In a partitioned system, sockets in the same partition are in the same coherency
domain, so they cannot continue to operate if even one of the processors asserts
THERMTRIP_N and shuts down. Moreover, a cold reset is required to get the part back
up after a THERMTRIP event. Because cold reset will reset all the sockets in the
partition, the other sockets cannot continue running without a reset event.
5.1.7
PROCHOT
The temperature at PROCHOT represents the maximum normal operating temperature
of the processor. PROCHOT_N is asserted when the processor temperature is greater
than or equal to T
PROCHOT.
PROCHOT_N is a signal from the processor to the platform indicating that the processor
has detected an over-temperature condition and it is taking corrective measures. This
pin is not asserted when FORCEPR_N or VR_THERMALERT_N is asserted unless the
thermal system has detected a PROCHOT condition independent of those input signals.
The condition may occur due to any of the following conditions:
• The thermal environment is outside of the limits defined for full performance
operation.
• The processor power consumption is unbalanced due to very high activity factors in
some cores coupled with very low activity factors in others.
5.1.8
FORCEPR_N Signal Pin
FORCEPR_N is an input pin that will force the processor into one of two modes. The
default mode is the same state as PROCHOT_N. The processor will go into Single Issue
Mode (SIM) and also transition to the voltage and frequency of the lowest supported
P-state. Time limits and CMCI generation are the same as PROCHOT_N. The second
mode, selectable via QR_CSR_IPF_THERM_CONFIG.forcepr_mode, disables SIM and
timer functions while maintaining core frequency and voltage throttling. Both modes
can be disabled via QR_CSR_IPF_THERM_CONFIG.forcepr_disable.
5.1.9
Ararat Voltage Regulator Thermal Signals
The Intel
®
Itanium
®
Processor 9300 Series and Intel
®
Itanium
®
Processor 9500 Series
package allows the Ararat Voltage Regulator to signal to the platform when it
approaches its own thermal limits. The specific signals for this purpose are VR_FAN_N,
VR_THERMALERT_N, and VR_THERMTRIP_N.
The processor does not monitor or respond to the VR_FAN_N and VR_THERMTRIP_N
pins. The response to VR_THERMALERT_N is to force the processor into the same state
as PROCHOT_N. The processor will go into SIM and also transition to the voltage and
frequency of the lowest supported P-state. Time limits and CMCI generation are active.
This response may be disabled via R_CSR_IPF_THERM_CONFIG.vr_thermalert_disable.
Содержание BX80569Q9550 - Core 2 Quad 2.83 GHz Processor
Страница 10: ...Introduction 10 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 22: ...Introduction 22 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 72: ...Electrical Specifications 72 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 118: ...Pin Listing 118 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 132: ...Mechanical Specifications 132 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 142: ...Thermal Specifications 142 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 158: ...System Management Bus Interface 158 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Страница 170: ...170 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...