AC82G41SLGQ3 Datasheet, PDF (262/604 Pages) Intel Corporation – Intel® 4 Series Chipset Family

Host-Secondary PCI Express* Bridge Registers (D6:F0) (Intel^® 82P45 MCH Only)
8.42
SLOTCTL—Slot Control
B/D/F/Type:
Address Offset:
Default Value:
Access:
Size:
0/6/0/PCI
B8–B9h
0000h
RO, RW
16 bits
PCI Express Slot related registers.
Bit
15:13
12
11
10
9:8
Access
RO
RO
RO
RO
RO
Default
Value
000b
0b
0b
0b
00b
RST/
PWR
Core
Core
Core
Core
Core
Description
Reserved
Data Link Layer State Changed Enable (DLLSCE): If the Data
Link Layer Link Active capability is implemented, when set to 1b, this
field enables software notification when Data Link Layer Link Active
field is changed.
If the Data Link Layer Link Active capability is not implemented, this
bit is permitted to be read only with a value of 0b.
Electromechanical Interlock Control (EIC): If an
Electromechanical Interlock is implemented, a write of 1b to this field
causes the state of the interlock to toggle. A write of 0b to this field
has no effect. A read to this register always returns a 0.
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, 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.
0 = Power On
1 = Power Off
If the Power Controller Implemented field in the Slot Capabilities
register is set to 0b, then writes to this field have no effect and the
read value of this field is undefined.
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, 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
If the Power Indicator Present bit in the Slot Capabilities register is
0b, this field is permitted to be read-only with a value of 00b.
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Datasheet