System Management Bus Interface
156
Intel
®
Itanium
®
Processor 9300 Series and 9500 Series Datasheet
6.4.8.2
Recommended Thermalert Hot De-assertion Hysteresis
The de-assertion threshold is expressed as the number of degrees C below the
thermalert hot threshold value in Hex format.
Example
: reading offset 6Bh=00001010 and 6Ch=0000010, then programming the
CSRs with these values means THERMALERT_N will be asserted when junction
temperature rises to 10C below the PROCHOT_N (thermal throttle) threshold and will
remain asserted until the junction temperature drops to 12°C below the PROCHOT_N
threshold.
6.4.8.3
Thermal Design Power
Offset 6Dh is programmed with 2 Hex digits representing the max TDP of the part.
Example
: 6Dh = 0xB9 indicates a 185 W part.
6.4.8.4
TControl
Offset 6Eh contains the recommended TControl spec in degrees C below PROCHOT_N
temperature in Hex format.
6.4.9
Feature Data
This section provides information on key features that the platform may need to
understand without powering on the processor.
6.4.9.1
Processor Core Feature Flags
For the Intel
®
Itanium
®
Processor 9300 Series, offset 72h-75h contains a copy of
results in EDX[31:0] from Function 1 of the CPUID instruction. These details provide
instruction and feature support by product family.
These fields are RESERVED for the
Intel
®
Itanium
®
Processor 9500 Series processor.
6.4.9.2
Package Feature Flags
Offset 78h-79h provides additional feature information from the processor. This field is
defined as follows:
6.4.9.3
Number of Devices in TAP Chain
At offset 7Bh, a 4-bit Hex digit is used to tell how many devices are in the TAP Chain.
The four bits are the most significant bits at this offset.
Since Intel
®
Itanium
®
Processor 9300 Series and Intel
®
Itanium
®
Processor 9500
Series processors have one TAP per core plus a sysint TAP, this field would be set to 50h
for the Intel
®
Itanium
®
Processor 9300 Series processor and 90 for the Intel
®
Table 6-4.
Offset 78h/79h Definitions
Bit
Definition
4-32
Reserved
3
Thermal calibration offset byte present
2
Scratch (OEM) EEPROM present (set if there is a scratch ROM at offset 80 - FFh)
1
Core VID present (set if there is a VID provided by the processor)
0
Reserved
Summary of Contents for BX80569Q9550 - Core 2 Quad 2.83 GHz Processor
Page 10: ...Introduction 10 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Page 22: ...Introduction 22 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Page 72: ...Electrical Specifications 72 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Page 118: ...Pin Listing 118 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Page 132: ...Mechanical Specifications 132 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Page 142: ...Thermal Specifications 142 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...
Page 170: ...170 Intel Itanium Processor 9300 Series and 9500 Series Datasheet ...