參數(shù)資料
型號： BX805573060
廠商： INTEL CORP
元件分類： 微控制器/微處理器
英文描述： 64-BIT, 2400 MHz, MICROPROCESSOR, CBGA775
封裝： LGA-775
文件頁數(shù)： 78/102頁
文件大?。?/td> 2428K
代理商： BX805573060
Dual-Core Intel Xeon Processor 3000 Series Datasheet
77
Thermal Specifications and Design Considerations
5.1.2
Thermal Metrology
The maximum and minimum case temperatures (TC) for the processor is specified in
Table 5-1. This temperature specification is meant to help ensure proper operation of
the processor. Figure 5-3 illustrates where Intel recommends TC thermal
measurements should be made. For detailed guidelines on temperature measurement
methodology, refer to the Dual-Core Intel Xeon Processor 3000 Series Thermal and
Mechanical Design Guidelines.
5.2
Processor Thermal Features
5.2.1
Thermal Monitor
The Thermal Monitor feature helps control the processor temperature by activating the
thermal control circuit (TCC) when the processor silicon reaches its maximum operating
temperature. The TCC reduces processor power consumption by modulating (starting
and stopping) the internal processor core clocks. The Thermal Monitor feature must
be enabled for the processor to be operating within specifications. The
temperature at which Thermal Monitor activates the thermal control circuit is not user
configurable and is not software visible. Bus traffic is snooped in the normal manner,
and interrupt requests are latched (and serviced during the time that the clocks are on)
while the TCC is active.
When the Thermal Monitor feature is enabled, and a high temperature situation exists
(i.e., TCC is active), the clocks will be modulated by alternately turning the clocks off
and on at a duty cycle specific to the processor (typically 30–50%). Clocks often will
not be off for more than 3.0 microseconds when the TCC is active. Cycle times are
processor speed dependent and will decrease as processor core frequencies increase. A
small amount of hysteresis has been included to prevent rapid active/inactive
transitions of the TCC when the processor temperature is near its maximum operating
temperature. Once the temperature has dropped below the maximum operating
temperature, and the hysteresis timer has expired, the TCC goes inactive and clock
modulation ceases.
Figure 5-3. Case Temperature (TC) Measurement Location
37.5 mm
Measure T
C a t this point
(geometric center of the package)
3
7
.5
m
37.5 mm
Measure T
C a t this point
(geometric center of the package)
3
7
.5
m
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