Intel E7520 AT80604004887AA User Manual

112

Intel® Xeon® Processor 7500 Datasheet, Volume 1

VID[7:0]

I/O

VID[7:0] is an input only during Power On Configuration. It is an output signal 

during normal operation. 
As an output, VID[7:0] (Voltage ID) are signals that are used to support automatic 

selection of power supply voltages (V

CC

). 

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 become valid. The VID signals are needed to support the 

processor voltage specification variations. The VR must supply the voltage that is 

requested by the signals, or disable itself.
As an inputs during Power On Configuration:
VID [7] is an electronic safety key for distinguishing VR11.1 from PMPV6.
VID[6] is a spare bit reserved for future use. 
VID[5:3] - IMON bits are output signals for IMON gain setting. VID[2:0] or 

MSID[2:0] - Market Segment ID, or MSID are provided to indicate the Market 

Segment for the processor and may be used for future processor compatibility or for 

keying. In addition, MSID protects the platform by preventing a higher power 

processor from booting in a platform designed for lower power processors. This 

value is latched from the platform in to the CPU, on the rising edge of VioPWRGOOD, 

during the cold boot power up sequence.

VIO_VID[4:1]

O

Voltage ID driven out to the VR 11.1 for dynamic/static adjustment of processor 

voltage set point. Note that these pins are either floated, or tied to ground on the 

package.

VIOC

I

VIOC provides power to the input/output interface on the Intel® Xeon® processor 

7500 series Intel® QuickPath Interconnect I/O.

VIOF

I

VIOF provides power to the input/output interface on the Intel® Xeon® processor 

7500 series Intel® Scalable Memory Interconnect I/O.

VIOPowerGood

I

VIO Power Good signal.

VREG

I

~1.8V. Voltage to PLLs. 

VSS

I

VSS is the ground plane for the Intel® Xeon® processor 7500 series.

VSSCACHESENSE

IO

VR Sense lines. (Vcache)