Lenovo LF80565QH0254M Datenblatt Seite 94

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Signal Definitions
94 Document Number: 318080-002
§
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 Table 2-3 for
definitions of these pins. The VR must supply the voltage that is requested by these
pins, or disable itself.
VSS_SENSE
VSS_SENSE2
O VSS_SENSE and VSS_SENSE2 provides an isolated, low impedance connection to the
processor core power and ground. These signals should be used to provide feedback
to the voltage regulator signals, which ensure the output voltage (that is, processor
voltage) remains within specification. Please see the applicable platform design guide
for implementation details.
VTT P The FSB termination voltage input pins. Refer to Table 2-9 for further details.
VTT_SEL O The VTT_SEL signal is used to select the correct V
TT
voltage level for the processor.
VTT_SEL is a no-connect on the Intel
®
Xeon
®
Processor 7200 Series and 7300 Series
package.
Table 5-1. Signal Definitions (Sheet 8 of 8)
Name Type Description Notes
Seitenansicht 93
1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 141 142

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