Signal Description
84 Datasheet, Volume 1
6.12 Processor Power Signals
6.13 Sense Pins
Table 6-14. Processor Power Signals
Signal Name Description
Direction/
Buffer Type
VCC Processor core power rail Ref
VCCIO Processor power for I/O Ref
VDDQ Processor I/O supply voltage for DDR3 Ref
VAXG Graphics core power supply. Ref
VCCPLL VCCPLL provides isolated power for internal processor PLLs Ref
VCCSA System Agent power supply Ref
VCCPQE
(BGA Only)
Filtered, low noise derivative of VCCIO
Ref
VCCDQ
(BGA Only)
Filtered, low noise derivative of VDDQ
Ref
VIDSOUT
VIDSCLK
VIDALERT#
VIDALERT#, VIDSCLK, and VIDSCLK comprise a three signal serial
synchronous interface used to transfer power management information
between the processor and the voltage regulator controllers. This serial
VID interface replaces the parallel VID interface on previous
processors.
I/O
O
I
CMOS
VCCSA_VID[1]
Voltage selection for VCCSA: This pin must have a pull down resistor
to ground.
O
CMOS
Table 6-15. Sense Pins
Signal Name Description
Direction/
Buffer Type
VCC_SENSE
VSS_SENSE
VCC_SENSE and VSS_SENSE provide an isolated, low impedance
connection to the processor core voltage and ground. They can be
used to sense or measure voltage near the silicon.
O
Analog
VAXG_SENSE
VSSAXG_SENSE
VAXG_SENSE and VSSAXG_SENSE provide an isolated, low
impedance connection to the V
AXG
voltage and ground. They can
be used to sense or measure voltage near the silicon.
O
Analog
VCCIO_SENSE
VSS_SENSE_VCCIO
VCCIO_SENSE and VSS_SENSE_VCCIO provide an isolated, low
impedance connection to the processor V
CCIO
voltage and ground.
They can be used to sense or measure voltage near the silicon.
O
Analog
VDDQ_SENSE
VSS_SENSE_VDDQ
VDDQ_SENSE and VSS_SENSE_VDDQ provides an isolated, low
impedance connection to the V
DDQ
voltage and ground. They can
be used to sense or measure voltage near the silicon.
O
Analog
VCCSA_SENSE
VCCSA_SENSE provide an isolated, low impedance connection to
the processor system agent voltage. It can be used to sense or
measure voltage near the silicon.
O
Analog
VCC_DIE_SENSE
Die Validation Sense: O
Analog
VCC_VAL_SENSE
VSS_VAL_SENSE
V
CC
Validation Sense: O
Analog
VAXG_VAL_SENSE
VSSAXG_VAL_SENSE
V
AXG
Validation Sense: O
Analog