Intel Pentium 4 BX80528JK150GR2 User Manual

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VID[4:0]

Output

VID[4:0] (Voltage ID) pins can be used to support automatic selection of power 
supply voltages. These pins are not signals, but are either an open circuit or a short 
circuit to VSS on the processor. The combination of opens and shorts defines the 
voltage required by the processor. The VID pins are needed to cleanly support 
processor voltage specification variations. See Table 2 for definitions of these pins. 
The power supply must supply the voltage that is requested by these pins, or 
disable itself.

V

SSA

Input

V

SSA

 is the isolated ground for internal PLL’s.

V

SSSENSE

Output

V

SSSENSE

 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