Specification Sheet

Signal Descriptions
34 Datasheet, Volume 1 of 2
4.9 Processor Power and Ground Supplies
Table 4-12. Power and Ground Signals
Signal Name Description
§
TXT_PLTEN
Intel
®
Trusted Execution Technology (Intel
®
TXT) Platform Enable Strap.
0 = The platform is not Intel
®
TXT enabled. All sockets should be set to
zero. Scalable DP (sDP) platforms should choose this setting if the Node
Controller does not support Intel
®
TXT.
1 = Default. The platform is Intel
®
TXT enabled. All sockets should be set
to one. In a non-Scalable DP platform this is the default. When this is
set, Intel
®
TXT functionality requires the user to explicitly enable Intel
®
TXT via BIOS setup.
This signal is pulled up on the die. Refer to Table 5-7, “Signals with On-Die
Weak PU/PD” for details.
PROCDIS_N PROCDIS_N assert initiates FRB and tri-states the processor.
PWR_DEBUG_N This is a debug signal for power debug using Intel
®
ITP on the processor.
SOCKET_ID2 Asynchronous to other clocks in the processor.
V
CCIN
1.8 V - 1.55 V input to the Integrated Voltage Regulator (IVR) for the
processor cores, lowest level caches (LLC), ring interface, PLL, IO, and home
agent. It is provided by a VR 13.0 compliant motherboard voltage regulator
(MBVR) for each CPU socket. The output voltage of this MBVR is controlled
by the processor, using the serial voltage ID (SVID) bus.
VCCIN_SENSE
VSS_VCCIN_SENSE
VCCIN_SENSE and VSS_VCCIN_SENSE are remote sense signals for V
CCIN
MBVR13.0 and are used by the voltage regulator to ensure accurate voltage
regulation. These signals must be connected to the voltage regulator
feedback circuit, which insures the output voltage remains within
specification.
VCCIO_SENSE
VSS_VCCIO_SENSE
VCCIO_SENSE and VSS_VCCIO_SENSE are remote sense signals for VCCIO
and are used by the voltage regulator to ensure accurate voltage regulation.
These signals must be connected to the voltage regulator feedback circuit,
which insures the output voltage remains within specification.
VCCSA_SENSE
VSS_VCCSA_SENSE
VCCSA_SENSE and VSS_VCCSA_SENSE are remote sense signals, and are
used by the voltage regulator to ensure accurate voltage regulation. These
signals must be connected to the voltage regulator feedback circuit, which
insures the output voltage remains within specification.
VCCIO 0.95 V - 1.0 V power supply for the processor IO.
VCCINPMAX
Pmax detect VCCIN supply through board R2 thermistor for VCCIN loadline
temperature compensation
VCCSA 1.05 V - 0.55 V supply for IIO
VSENSEPMAX Pmax detect circuit output voltage
V
CCD_012
V
CCD_345
1.2 V - 1.05 V power supply for the processor system memory interface.
V
SS Processor ground return.
V
CCIO IO voltage supply input.
Table 4-11. Miscellaneous Signals (Sheet 3 of 3)
Signal Name Description