NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 173

• Manufacturer Part Number: NH82801GHM S L8YR
• Manufacturer: Intel

Specifications of NH82801GHM S L8YR

• Lead Free Status / RoHS Status: Compliant

Functional Description
5.14.10.2
Table 5-37. PIC Reserved Bits Return Values
5.14.10.3
Table 5-38. Register Write Accesses in ALT Access Mode
5.14.11
5.14.11.1
Intel
®
ICH7 Family Datasheet
PIC Reserved Bits
Many bits within the PIC are reserved, and must have certain values written in order for
the PIC to operate properly. Therefore, there is no need to return these values in ALT
access mode. When reading PIC registers from 20h and A0h, the reserved bits shall
return the values listed in
Read Only Registers with Write Paths in ALT Access Mode
The registers described in
Software 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
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 ICH7 resume well, and to any other circuits that need to generate
Wake signals from the STR state.
I/O Address
HOT
PIC Reserved Bits
HOT
COLD
D0h
08h
and S3
OCW2(4:3)
OCW3(4:3)
ICW2(2:0)
ICW4(7:5)
ICW4(3:2)
OCW3(7)
OCW3(5)
ICW4(0)
COLD
DMA Status Register for channels 0–3.
DMA Status Register for channels 4–7.
.
Register Write Value
Table
Table 5-38
Value Returned
Reflects bit 6
5-37.
000
000
00
00
01
0
0
have write paths to them in ALT access mode.
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