Intel QX9775 EU80574XL088N 数据表

74

NOTES:
1.

For this processor land, the maximum number of symmetric agents is one. Maximum 
number of priority agents is zero.

2.

For this processor land, the maximum number of symmetric agents is two. Maximum 
number of priority agents is zero.

3.

For this processor land, the maximum number of symmetric agents is two. Maximum 
number of priority agents is one.

VCC_DIE_SENSE
VCC_DIE_SENSE2

O

VCC_DIE_SENSE and VCC_DIE_SENSE2 provides an 
isolated, low impedance connection to the processor core 
power and ground. This signal should be connected to the 
voltage regulator feedback signal, which insures the 
output voltage (that is, processor voltage) remains within 
specification. 

VID[6:1]

O

VID[6:1] (Voltage ID) pins are used to support automatic 
selection of power supply voltages (V

CC

). These are CMOS 

signals that are driven by the processor and must be 
pulled up through a resistor. Conversely, the voltage 
regulator output must be disabled prior to the voltage 
supply for these pins becomes invalid. The VID pins are 
needed to support processor voltage specification 
variations. See 

 for definitions of these pins. The 

VR must supply the voltage that is requested by these 
pins, or disable itself. 

VID_SELECT

O

VID_SELECT is an output from the processor which 
selects the appropriate VID table for the Voltage 
Regulator. This signal is not connected to the processor 
die. This signal is a no-connect on the processor package.

VSS_DIE_SENSE
VSS_DIE_SENSE2

O

VSS_DIE_SENSE and VSS_DIE_SENSE2 provides an 
isolated, low impedance connection to the processor core 
power and ground. This signal should be connected to the 
voltage regulator feedback signal, which insures the 
output voltage (that is, processor voltage) remains within 
specification. 

VTT

P

The FSB termination voltage input pins. Refer to 

 for further details.

VTT_OUT

O

The VTT_OUT signals are included in order to provide a 
local V

TT

 for some signals that require termination to V

TT

 

on the motherboard.

VTT_SEL

O

The VTT_SEL signal is used to select the correct V

TT

 

voltage level for the processor. VTT_SEL is connected to 
VSS on the processor package.