GD82559ER Datasheet, PDF (30/94 Pages) Intel Corporation – PCI Controller

GD82559ER — Networking Silicon
4.2.4.4
4.2.4.5
D3 Power State
In the D3 power state, the 82559ER has the same capabilities and consumes the same amount of
power as it does in the D2 state. However, it enables the PCI system to be in the B3 state. If the PCI
system is in the B3 state (in other words, no PCI power is present), the 82559ER provides wake-up
capabilities if it is connected to an auxiliary power source in the system. If PME is disabled, the
82559ER does not provide wake-up capability or maintain link integrity. In this mode the 82559ER
consumes its minimal power.
The 82559ER enables a system to be in a sub-5 watt state (low power state) and still be virtually
connected. More specifically, the 82559ER supports full wake-up capabilities while it is in the
D3_cold state. The 82559ER can be connected to an auxiliary power source (V_AUX), which enables it
to provide wake-up functionality while the PCI power is off. The typical current consumption of
the 82559ER is 125 mA at 3.3 V. Thus, a dual power plane is not required. If connected to an
auxiliary power source, the 82559ER receives all of its power from the auxiliary source in all
power states.
Understanding Power Requirements
When running the 82559ER off a 3.3V_standby power source, the actual power consumption will
scale with network traffic. In other words, if the 82559ER is monitoring the network for ACPI
“Interesting Packets” only the PCI bus specific circuitry will be disabled. As an a example the
8259ER will typically draw approximately 120mA, in D1-D3 under a full Ethernet load. In the D0
state, the 82559ER will typically consume 125mA under the same load conditions.
The tables below summarizes the 82559ER’s functionality and power consumption at the different
power states
Power State
Conditions
D0
Maximum
D0
Average (5 Mbs)
Dynamic standby
D0
(With Network Load)
D2/D3 (link
down)
PCI CLK
w/o PCI CLK
Dx (x>0 with
PCI CLK
PME# disabled) _{w/o PCI CLK}
100 Mbs
175 mA
125 mA
120 mA
10 mA
3 mA
10 mA
3 mA
10 Mbs
140 mA
115 mA
55 mA
10 mA
3 mA
10 mA
3 mA
NOTE: All values shown for the D3 state assume the availability of 3.3 V Standby available to the
device.
1. For a topology of two 82559ER devices connected by a crossed twisted-pair Ethernet cable, the deep power-down mode should be
disabled. If it is enabled, the two devices may not detect each other if the operating system places them into a low power state before both
nodes become active.
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Datasheet