FW82801DBM S L6DN Intel, FW82801DBM S L6DN Datasheet - Page 376
FW82801DBM S L6DN
Manufacturer Part Number
FW82801DBM S L6DN
Description
Manufacturer
Intel
Datasheet
1.FW82801DBM_S_L6DN.pdf
(615 pages)
Specifications of FW82801DBM S L6DN
Lead Free Status / RoHS Status
Not Compliant
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LPC Interface Bridge Registers (D31:F0)
9.8.3.7
9.8.3.8
9.8.3.9
376
LV3—Level 3 Register
I/O Address:
Default Value:
Lockable:
NOTE: If the C4onC3_EN bit is set, the LV3 read will initiate a LV4 transition rather than a LV3 transition.
LV4—Level 4 Register
I/O Address:
Default Value:
Lockable:
PM2_CNT—Power Management 2 Control
I/O Address:
Default Value:
Lockable:
Power Well:
7:0
7:0
7:1
Bit
Bit
Bit
0
Reads to this register return all zeros, writes to this register have no effect. Reads to this register
generate a “enter a C3 power state” to the clock control logic. The C3 state persists until a break
event occurs.
Reads to this register return all zeros, writes to this register have no effect. Reads to this register
generate a “enter a C4 power state” to the clock control logic. The C4 state persists until a break
event occurs.
Reserved
Arbiter Disable (ARB_DIS) — R/W
0 = Enable Hub Interface arbiter
1 = Disable Hub Interface arbiter. ARB_DIS will only disable the arbiter at the Hub Interface to
NOTES:
1. In general, software should not attempt any non-posted accesses during arbiter disable except to
the ICH4's power management registers. This implies that interrupt handlers for any unmasked
hardware interrupts and SMI/NMI should check ARB_DIS status before reading from ICH
devices.
prevent up-bound traffic. Consequently, the PCI arbiter will continue to issue GNT#s even when
ARB_DIS is set. Note that after the arbiter is disabled, the processor must not initiate down-
bound reads to PCI devices that may have up-bound posted data, as this will result in system
deadlock.
No
No
No
Core
PMBASE + 15h (
00h
PMBASE + 16h (
00h
PMBASE + 20h
(
00h
ACPI PM2_BLK)
ACPI P_BLK + 5)
ACPI P_BLK + 6)
Description
Description
Description
Attribute:
Size:
Usage:
Power Well:
Attribute:
Size:
Usage:
Power Well:
Attribute:
Size:
Usage:
Intel
®
82801DBM ICH4-M Datasheet
RO
8 bit
ACPI or Legacy
Core
RO
8 bit
ACPI or Legacy
Core
R/W
8 bit
ACPI
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