Intel GD82559ER Manual

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Datasheet

55

Networkin

g

Silicon — GD82559ER

7.1.19 Power Mana

g

ement Control/Status Re

g

ister

(

PMCSR

)

The Power Management Control/Status is a word register. It is used to determine and change the

current power state of the 82559ER and control the power management interrupts in a standard

manner.

24:22 000b Read Onl

y

Auxiliary Current.

This field reports whether the 82559ER

implements the Data re

g

isters. The auxiliar

y

power consumption is

the same as the current consumption reported in the D3 state in the

Data re

g

ister.

21 1b Read Onl

y

Device Specific Initialization (DSI).

The DSI bit indicates whether

special initialization of this function is re

q

uired

(

be

y

ond the standard

PCI confi

g

uration header

)

before the

g

eneric class device driver is

able to use it. DSI is re

q

uired for the 82559ER after D3-to-D0 reset.

20 0b

(

PCI

)

Read Onl

y

Reserved (PCI).

When this bit is set to ‘1’, it indicates that the

82559ER re

q

uires auxiliar

y

power supplied b

y

the s

y

stem for wake-

up from the D3

cold

state.

19 0b Read Onl

y

PME Clock.

The 82559ER does not re

q

uire a clock to

g

enerate a

power mana

g

ement event.

18:16 010b Read Onl

y

Version.

A value of indicates that the 82559ER complies with the PCI

Power Mana

g

ement Specification, Revision 2.2.

Table 8. Power Mana

g

ement Ca

p

abilit

y

Re

g

ister

Bits Default Read/Write Description

Table 9. Power Mana

g

ement Control and Status Re

g

ister

Bits Default Read/Write Description

15 0b Read/Clear

PME Status.

This bit is set upon a wake-up event. It is independent of

the state of the PME Enable bit. If 1b is written to this bit, the bit will be

cleared. It also de-asserts the PME# si

g

nal and clears the PME status

bit in the Power Mana

g

ement Driver Re

g

ister. When the PME# si

g

nal

is enabled, the PME# si

g

nal reflects the state of the PME status bit.

14:13 00b Read Onl

y

Data Scale.

This field indicates the data re

g

ister scalin

g

factor. It

e

q

uals 10b for re

g

isters zero throu

g

h ei

g

ht and 00b for re

g

isters nine

throu

g

h fifteen.

12:9 0000b Read Onl

y

Data Select.

This field is used to select which data is reported throu

g

h

the Data re

g

ister and Data Scale field.

8 0b Read Clear

PME Enable.

This bit enables the 82559ER to assert PME#.

7:5 000b Read Onl

y

Reserved

. These bits are reserved and should be set to 000b.

4 0b Read Onl

y

Dynamic Data.

The 82559ER does not support the abilit

y

to monitor

the power consumption d

y

namicall

y

.

3:2 00b Read Onl

y

Reserved.

These bits are reserved and should be set to 00b.

1:0 00b Read/Write

Power State.

This 2-bit field is used to determine the current power

state of the 82559ER and to set the 82559ER into a new power state.

The definition of the field values is as follows.

00 - D0

01 - D1

10 - D2

11 - D3