Digital Thermometer; Thermal Sensor Accuracy Distribution For The Intel ® Itanium ® Processor 9300 Series - Intel BX80569Q9550 - Core 2 Quad 2.83 GHz Processor Datasheet

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Figure 5-1. Intel Itanium
Series' Thermal States
5.1.1

Digital Thermometer

The Intel
uses a thermal sensing device called Digital Thermometer (DT) to read the values from
the thermal sensors available on the processor die. The DT also compares these values
to a thermal trip point that is hard-wired. Calibration information is used to translate
the DT output to processor temperature in degrees Celsius relative to the PROCHOT
setpoint. DT readout is available in CSR or via SMBus. When it is below the PROCHOT
setpoint the DT readout will have a positive value. The DT has a limited range. It will
report out the value of its upper or lower limits when it has reached the limits and set
QR_CSR_IPF_THERM_STATUS.valid = 1'b0.
5.1.1.1 Thermal Sensor Accuracy Distribution for the Intel
Processor 9300 Series
Table 5-1
for the an Intel
PROCHOT and represents the typical ±3-sigma range. This data is for a large sample of
parts. It should be noted that a particular part should be consistent across the entire
operating range.
Table 5-1. Thermal Sensor Accuracy Distribution for the Intel
Series (Sheet 1 of 2)
0x83 - 0x80, 0x00 - 0x07
0x08 - 0x0E
0x0F - 0x14
0x15 - 0x1B
0x1C - 0x22
0x23 - 0x29
134
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Processor 9300 Series and Intel
P R O C H O T
T
C O N T R O L
T H E R M A L E R T
D ia g ra m n o t to s c a le
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Itanium Processor 9300 Series and Intel
shows the processor thermal sensor accuracy with respect to the DT readout
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Itanium Processor 9300 Series. The margin of error is relative to
DT Readout
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T H E R M T R IP
T H E R M W A R N
M a x O p e ra t in g T e m p e ra tu re
T im e
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Itanium
Expected Margin of Error
Relative to PROCHOT
±1°C
±2°C
±3°C
±4°C
±5°C
±6°C
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Intel Itanium Processor 9300 Series and 9500 Series Datasheet
Thermal Specifications
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Itanium Processor 9500
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Processor 9500 Series
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Itanium
® Itanium ® Processor 9300