82583V Datasheet, PDF (171/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Power Management and Delivery—82583V GbE Controller
8.3
8.3.1
8.3.2
8.4
8.4.1
Power Delivery
82583V operates from the following power rails:
• A 3.3 V dc power rail for internal power regulation and for periphery. The 3.3 V dc
should be supplied by an external power source.
• A 1.9 V dc power rail.
• A 1.05 V dc power rail.
The 1.9 V dc Rail
The 1.9 V dc rail is used for core and I/O functions. It also feeds internal regulators to a
lower 1.05 V dc core voltage. The 1.9 V dc rail can be generated in one of two ways:
• An external power supply not dependent on support from the 82583V. For
example, the platform designer might choose to route a platform-available 1.9 V dc
supply to the 82583V.
• Internal voltage regulator solution, where the control logic for the power transistor
is embedded in the 82583V, while the power transistor is placed externally. Control
is done using the CTRL19 pin.
The 1.05 V dc Rail
The 1.05 V dc rail is used for core functions and can be generated in one of the
following ways:
• An external power supply not dependent on support from the 82583V.
• Internal voltage regulator solution, where the control logic for the power transistor
is embedded in the 82583V, while the power transistor is placed externally. Control
is done using the CTRL10 pin.
• A complete internal voltage regulator solution. The internal voltage regulator can
be disabled by the DIS_REG10 pin.
Power Management
82583V Power States
The 82583V supports D0 and D3 power states defined in the PCI Power Management
and PCIe specifications. D0 is divided into two sub-states: D0u (D0 Un-initialized), and
D0a (D0 active). In addition, the 82583V supports a Dr state that is entered when
PE_RST_N is asserted (including the D3cold state).
Figure 40 shows the power states and transitions between them.
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