QG5000XSL9TH Datasheet, PDF (153/458 Pages) Intel Corporation – Intel 5000X Chipset Memory Controller Hub (MCH)

Register Description
3.8.11.10 PEXSLOTCTRL[7:2, 0] - PCI Express Slot Control Register
The Slot Control register identifies the PCI Express specific slot control specific
parameters for operations such as hot-plug and Power Management. Software issues a
command to a hot-plug capable Port by issuing a write transaction that targets Slot
Control Register fields viz, PWRCTRL, PWRLED, ATNLED described below. A single write
to the Slot Control register is considered to be a single command, even if the write
affects more than one field in the Slot Control register. In response to this transaction,
the port must carry out the requested actions and then set the associated status field
(PEXSLOTS.CMDCMP) for the command completed event. The PEXSLOTSTS.CMDCMP
bit will be set only when there is a unique change to the state of the PWRCTRL,
PWRLED, ATNLED in this register.
Device:
Function:
Offset:
Version:
Device:
Function:
Offset:
Version:
0, 2-3
0
84h
Intel 5000P Chipset, Intel 5000V Chipset, Intel 5000Z Chipset
4-5
0
84h
Intel 5000Z Chipset
Device:
Function:
Offset:
Version:
4-7
0
84h
Intel 5000P Chipset
Bit
15:11
10
Attr
RV
RW
9:8
RW
Default
0h
0h
0h
Description
Reserved.
PWRCTRL: Power Controller Control
This bit indicates the current state of the Power applied to the slot of the PCI
Express port.
0: Power On
1: Power Off
PWRLED: Power Indicator Control
This bit indicates the current state of the Power Indicator of the PCI Express
port
00: Reserved.
01: On
10: Blink (The Intel 5000P Chipset MCH drives 1.5 Hz square wave for Chassis
mounted LEDs in the case of legacy card form factor for PCI Express devices)
11: Off
Default is set to 11b (OFF)
When this field is written, the Intel 5000P Chipset MCH sends appropriate
POWER_INDICATOR messages through the PCI Express port. For legacy card
based PCI Express devices, the event is signaled via the virtual pins1 of the
Intel 5000P Chipset MCH, in addition. For PCI Express modules with advanced
form factor that incorporate LEDs and onboard decoding logic, the PCI Express
messages are interpreted directly (No virtual pins).
Intel^® 5000X Chipset Memory Controller Hub (MCH) Datasheet
153