Intel P8700 Data Sheet - Page 100

Table 19., Signal Description, Sheet 8 of 8, Description

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Package Mechanical Specifications and Pin Information Table 19. Signal Description (Sheet 8 of 8) Name VCCSENSE VID[6:0] VSSSENSE Type Output Output Output Description VCCSENSE together with VSSSENSE are voltage feedback signals that control the 2.1 mΩ loadline at the processor die. It should be used to sense voltage near the silicon with little noise. VID[6:0] (Voltage ID) pins are used to support automatic selection of power supply voltages (VCC). Unlike some previous generations of processors, these are CMOS signals that are driven by the processor. The voltage supply for these pins must be valid before the VR can supply VCC to the processor. Conversely, the VR output must be disabled until the voltage supply for the VID pins becomes valid. The VID pins are needed to support the processor voltage specification variations. See Table 2 for definitions of these pins. The VR must supply the voltage that is requested by the pins, or disable itself. VSSSENSE together with VCCSENSE are voltage feedback signals that control the 2.1-mΩ loadline at the processor die. It should be used to sense ground near the silicon with little noise. § 100 Datasheet

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Package Mechanical Specifications and Pin Information
100
Datasheet
§
VCCSENSE
Output
VCCSENSE together with VSSSENSE are voltage feedback signals
that control the 2.1 m
Ω
loadline at the processor die. It should be
used to sense voltage near the silicon with little noise.
VID[6:0]
Output
VID[6:0] (Voltage ID) pins are used to support automatic selection
of power supply voltages (V
CC
). Unlike some previous generations
of processors, these are CMOS signals that are driven by the
processor. The voltage supply for these pins 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 pins becomes
valid. The VID pins are needed to support the processor voltage
specification variations. See
Table 2
for definitions of these pins.
The VR must supply the voltage that is requested by the pins, or
disable itself.
VSSSENSE
Output
VSSSENSE
together with VCCSENSE
are voltage feedback signals
that control the 2.1-m
Ω
loadline at the processor die. It should be
used to sense ground near the silicon with little noise.
Table 19.
Signal Description
(Sheet 8 of 8)
Name
Type
Description