Intel PENTIUM P6000 - DATASHEET 2010 - Page 81

Datasheet 81
Signal Description
VID[6]
VID[5:3]/CSC[2:0]
VID[2:0]/MSID[2:0]
VID[6:0] (Voltage ID) Pins: Used to
support automatic selection of power supply
voltages (VCC). These are CMOS signals that
are driven by the processor.
CSC[2:0]/VID[5:3] - Current Sense
Configuration bits, for ISENSE gain setting.
This value is latched on the rising edge of
VTTPWRGOOD.
MSID[2:0]/VID[2:0]- Market Segment
Identification is used to indicate the
maximum platform capability to the
processor. A processor will only boot if the
MSID[2:0] pins are strapped to the
appropriate setting (or higher) on the
platform (see Table 7-37 for MSID
encodings). MSID is used to help protect the
platform by preventing a higher power
processor from booting in a platform
designed for lower power processors.
MSID[2:0] are latched on the rising edge of
VTTPWRGOOD.
NOTE: VID[5:3] and VID[2:0] are bi-
directional. As an input, they are CSC[2:0]
and MSID[2:0] respectively.
O
CMOS
VTT_SELECT The VTT_SELECT signal is used to select the
correct VTT voltage level for the processor.
O
CMOS
VCC_SENSE
VSS_SENSE
Voltage Feedback Signals to an Intel MVP-6.5
Compliant VR: Use VCC_SENSE to sense
voltage and VSS_SENSE to sense ground
near the silicon with little noise.
O
A
VTT_SENSE
VSS_SENSE_VTT
Isolated low impedance connection to the
processor VTT voltage and ground. They can
be used to sense or measure voltage near
the silicon.
O
A
VAXG Graphics core power rail. Ref
VAXG_SENSE
VSSAXG_SENSE
VAXG_SENSE and VSSAXG_SENSE provide
an isolated, low impedance connection to the
VAXG voltage and ground. They can be used
to sense or measure voltage near the silicon.
O
A
GFX_VID[6:0] GFX_VID[6:0] (Voltage ID) pins are used to
support automatic selection of nominal
voltages (VAXG). These are CMOS signals
that are driven by the processor.
O
CMOS
GFX_VR_EN GPU output signal to Intel MVP6.5 compliant
VR. This signal is used as an on/off control to
enable/disable the GPU VR.
O
CMOS
Table 6-33.Processor Power Signals (Sheet 2 of 3)
Signal Name Description
Direction/Buffer
Type