Processor Power And Ground Supplies; Power And Ground Signals - Intel BX80619I73960X Datasheet

6.9

Processor Power and Ground Supplies

Table 6-14. Power and Ground Signals
Signal Name
VCC_SENSE
VSS_VCC_SENSE
VSA_SENSE
VSS_VSA_SENSE
VTTD_SENSE
VSS_VTTD_SENSE
VCCD_01 and VCCD_23
48
Variable power supply for the processor cores, lowest level caches (LLC), ring
interface, and home agent. It is provided by a VR12 compliant regulator. The
output voltage of this supply is selected by the processor using the serial
VCC
voltage ID (SVID) bus.
Note: VCC has a Vboot setting of 0.0 V and is not included in the PWRGOOD
indication.
VCC_SENSE and VSS_VCC_SENSE provide an isolated, low impedance
connection to the processor core power and ground. These signals must be
connected to the voltage regulator feedback circuit, which insures the output
voltage (that is, processor voltage) remains within specification.
VSA_SENSE and VSS_VSA_SENSE provide an isolated, low impedance
connection to the processor system agent (VSA) power plane. These signals
must be connected to the voltage regulator feedback circuit, which insures
the output voltage (that is, processor voltage) remains within specification.
VTTD_SENSE and VSS_VTTD_SENSE provide an isolated, low impedance
connection to the processor I/O power plane. These signals must be
connected to the voltage regulator feedback circuit, which insures the output
voltage (that is, processor voltage) remains within specification.
Power supply for the processor system memory interface. Provided by two
VR12 compliant regulators or two non-VR12 voltage regulators (simple
switching VRs for example). VCCD_01 and VCCD_23 are used for memory
channels 0, 1 & 2, 3 respectively. VCCD_01 and VCCD_23 will also be
referred to as VCCD. VCCD is generic for VCCD_01, VCCD_23.
Note:
VCCPLL Fixed power supply (1.8 V) for the processor phased lock loop (PLL).
Variable power supply for the processor system agent units. These include
logic (non-I/O) for the integrated I/O controller, the integrated memory
controller (iMC), and the Power Control Unit (PCU). The output voltage of this
VSA
supply is selected by the processor, using the serial voltage ID (SVID) bus.
Note: VSA has a Vboot setting of 0.9 V.
VSS Processor ground node.
Combined fixed analog and digital power supply for I/O sections of Direct
VTTA
Media Interface Gen 2 (DMI2) interface and PCI Express* interface. Will also
VTTD
be referred to as VTT.
Description
The processor must be provided VCCD_01 and VCCD_23 for proper
operation, even in configurations where no memory is populated. A
VR12.0 controller is recommended, but not required.
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Signal Descriptions
Datasheet, Volume 1