Intel 9130M NE80567KF0288M User Manual

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The VID_VCCCORE[6:0] and VID_VCCUNCORE[6:0] lands supply the encoding that 
determine the voltage to be supplied by the VCCCORE and VCCUNCORE (the core and 
system interface voltages for the Intel® Itanium® processor 9300 series) voltage 
regulators. The VID_VCCCORE and VID_VCCUNCORE specifications for the processor 
are defined in the Ararat  170 Watt  Voltage Regulator Design Guide. The voltage set by 
the VID_VCCCORE and VID_VCCUNCORE lands are the maximum VCCCORE and 
VCCUNCORE voltage allowed by the processor. 

Individual processor VID_VCCCORE and VID_VCCUNCORE values may be calibrated 
during manufacturing such that two devices at the same core speed may have different 
default VID_VCCCORE and VID_VCCUNCORE settings. Furthermore, any Intel® 
Itanium® processor 9300 series

 

can drive different VID_VCCCORE and 

VID_VCCUNCORE settings during normal operation.

The Intel® Itanium® processor 9300 series uses seven voltage identification lands 
(VID_VCCCORE[6:0]) and seven system interface voltage identifications 
(VID_VCCUNCORE[6:0]) to support automatic selection of Ararat voltages. 

 

specifies the voltage levels corresponding to the state of VID_VCCCORE[6:0] and 
VID_VCCUNCORE[6:0]. A ‘1’ in this table refers to a high voltage level and a ‘0’ refers 
to a low voltage level. 

The Intel® Itanium® processor 9300 series provides the ability to operate while 
transitioning to an adjacent VID and its associated processor core voltage (VCCCORE). 
This will represent a DC shift in the load line. It should be noted that a low-to-high or 
high-to-low voltage state change may result in as many VID transitions as necessary to 
reach the target core voltage. Transitions above the specified VID are not permitted. 

The Ararat voltage regulator must be capable of regulating its output to the value 
defined by the new VID. Please refer to the Ararat  170 Watt  Voltage Regulator Design 
Guide.