NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 170

• Manufacturer Part Number: NH82801FBM S L89K
• Manufacturer: Intel

Specifications of NH82801FBM S L89K

• Lead Free Status / RoHS Status: Compliant

Functional Description
5.14.10.3
5.14.11
5.14.11.1
5.14.11.1.1
5.14.11.1.2
170
Table 5-37. Register Write Accesses in ALT Access Mode
Read Only Registers with Write Paths in
ALT Access Mode
The registers described in
restores these values after returning from a powered down state. These registers must be handled
special by software. When in normal mode, writing to the base address/count register also writes to
the current address/count register. Therefore, the base address/count must be written first, then the
part is put into ALT access mode and the current address/count register is written.
System Power Supplies, Planes, and Signals
Power Plane Control with SLP_S3#, SLP_S4#
and SLP_S5#
The usage of SLP_S3# and SLP_S4# depends on whether the platform is configured for S3
S3
S3
The SLP_S3# output signal is used to cut power only to the processor and associated subsystems
and to optionally stop system clocks.
S3
The SLP_S3# output signal can be used to cut power to the system core supply, since it only goes
active for the STR state (typically mapped to ACPI S3). Power must be maintained to the ICH6
resume well, and to any other circuits that need to generate Wake signals from the STR state.
Cutting power to the core may be done via the power supply, or by external FETs to the
motherboard.
The SLP_S4# or SLP_S5# output signal can be used to cut power to the system core supply, as well
as power to the system memory, since the context of the system is saved on the disk. Cutting power
to the memory may be done via the power supply, or by external FETs to the motherboard.
The SLP_S4# output signal is used to remove power to additional subsystems that are powered
during SLP_S3#.
SLP_S5# output signal can be used to cut power to the system core supply, as well as power to the
system memory, since the context of the system is saved on the disk. Cutting power to the memory
may be done via the power supply, or by external FETs to the motherboard.
I/O Address
COLD
HOT
COLD
D0h
08h
.
DMA Status Register for channels 0–3.
DMA Status Register for channels 4–7.
Table 5-37
Register Write Value
have write paths to them in ALT access mode. Software
Intel
®
I/O Controller Hub 6 (ICH6) Family Datasheet
HOT
and