Intel 4 HT 631 80552PG0802M2M Ficha De Dados

Datasheet

73

 

VID[5:0]

Output

VID[5:0] (Voltage ID) signals are used to support automatic 
selection of power supply voltages (V

CC

). Refer to the Voltage 

Regulator-Down (VRD) 10.1 Design Guide for Desktop Socket 775 
for more information. The voltage supply for these signals must be 
valid before the VR can supply V

CC

 to the processor. Conversely, 

the VR output must be disabled until the voltage supply for the VID 
signals becomes valid. The VID signals are needed to support the 
processor voltage specification variations. See 

 for 

definitions of these signals. The VR must supply the voltage that is 
requested by the signals, or disable itself.

VSS

Input

VSS are the ground pins for the processor and should be connected 
to the system ground plane. 

VSSA

Input

VSSA is the isolated ground for internal PLLs.

VSS_SENSE

Output

VSS_SENSE is an isolated low impedance connection to processor 
core V

SS

. It can be used to sense or measure ground near the 

silicon with little noise.

VSS_MB_ 
REGULATION

Output

This land is provided as a voltage regulator feedback sense point 
for V

SS

. It is connected internally in the processor package to the 

sense point land V27 as described in the Voltage Regulator-Down 
(VRD) 10.1 Design Guide for Desktop Socket 775.

VTT

Miscellaneous voltage supply.

VTT_OUT_LEFT

VTT_OUT_RIGHT

Output

The VTT_OUT_LEFT and VTT_OUT_RIGHT signals are included to 
provide a voltage supply for some signals that require termination 
to V

TT

 on the motherboard. 

VTT_SEL

Output

The VTT_SEL signal is used to select the correct V

TT

 voltage level 

for the processor. This land is connected internally in the package 
to V

TT

.

VTTPWRGD

Input

The processor requires this input to determine that the V

TT

 voltages 

are stable and within specification.