82G33 datasheet(217/437 Pages) INTEL

217 / 437 page

PCI Express* Registers (D1:F0)

Datasheet

217

Bit

Access &

Default

Description

Power Controller Control (PCC): If a Power Controller is

implemented, this field when written sets the power state of the slot

per the defined encodings. Reads of this field must reflect the value

from the latest write, even if the corresponding hotplug command is

not complete, unless software issues a write without waiting for the

previous command to complete in which case the read value is

undefined.

Depending on the form factor, the power is turned on/off either to the

slot or within the adapter. Note that in some cases the power

controller may autonomously remove slot power or not respond to a

power-up request based on a detected fault condition, independent of

the Power Controller Control setting.

The defined encodings are:

0 = Power On

1 = Power Off

If the Power Controller Implemented field in the Slot Capabilities

read value of this field is undefined.

9:8

01b

Power Indicator Control (PIC): If a Power Indicator is

implemented, writes to this field set the Power Indicator to the written

state. Reads of this field must reflect the value from the latest write,

even if the corresponding hot-plug command is not complete, unless

software issues a write without waiting for the previous command to

complete in which case the read value is undefined.

00 = Reserved

01 = On

10 = Blink

11 = Off

7:6

11b

Attention Indicator Control (AIC): If an Attention Indicator is

implemented, writes to this field set the Attention Indicator to the

written state.

Reads of this field must reflect the value from the latest write, even if

the corresponding hot-plug command is not complete, unless software

issues a write without waiting for the previous command to complete

in which case the read value is undefined. If the indicator is

electrically controlled by chassis, the indicator is controlled directly by

the downstream port through implementation specific mechanisms.

00 = Reserved

01 = On

10 = Blink

11 = Off

82G33 Datasheet(PDF) 217 Page - Intel Corporation

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