876784 Intel, 876784 Datasheet - Page 436
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876784
Manufacturer Part Number
876784
Description
Manufacturer
Intel
Datasheet
1.876784.pdf
(848 pages)
Specifications of 876784
Lead Free Status / RoHS Status
Compliant
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10.8.3.3
436
PM1_CNT—Power Management 1 Control
I/O Address:
Default Value:
Lockable:
Power Well:
(Desktop
(Mobile/
Mobile
31:14
12:10
Only)
Only)
Ultra
9:3
Bit
13
2
1
1
0
Reserved.
Sleep Enable (SLP_EN) — WO. Setting this bit causes the system to sequence into
the Sleep state defined by the SLP_TYP field.
Sleep Type (SLP_TYP) — R/W. This 3-bit field defines the type of Sleep the system
should enter when the SLP_EN bit is set to 1. These bits are only reset by RTCRST#.
Reserved.
Global Release (GBL_RLS) — WO.
0 = This bit always reads as 0.
1 = ACPI software writes a 1 to this bit to raise an event to the BIOS. BIOS software
Reserved
Bus Master Reload (BM_RLD) — R/W. This bit is treated as a scratchpad bit. This
bit is reset to 0 by PLTRST#
0 = Bus master requests will not cause a break from the C3 state.
1 = Enable Bus Master requests (internal, external or BM_BUSY#) to cause a break
If software fails to set this bit before going to C3 state, the Intel
still return to a snoopable state from C3 or C4 states due to bus master activity.
SCI Enable (SCI_EN) — R/W. Selects the SCI interrupt or the SMI# interrupt for
various events including the bits in the PM1_STS register (bit 10, 8, 0), and bits in
GPE0_STS.
0 = These events will generate an SMI#.
1 = These events will generate an SCI.
Code
000b
001b
010b
011b
100b
101b
110b
has a corresponding enable and status bits to control its ability to receive ACPI
events.
from the C3 state.
PMBASE + 04h
(ACPI PM1a_CNT_BLK)
00000000h
No
Bits 0
Bits 8
Bits 13
–
–
Master Interrupt
ON: Typically maps to S0 state.
Asserts STPCLK#. Puts processor in Stop-Grant state. Optional to
assert CPUSLP# to put processor in sleep state: Typically, maps to S1
state.
Reserved
Reserved
Reserved
Suspend-To-RAM. Assert SLP_S3#: Typically maps to S3 state.
Suspend-To-Disk. Assert SLP_S3#, and SLP_S4#: Typically maps to
S4 state.
Soft Off Assert SLP S3# SLP S4# and SLP S5#: Typically maps to
7: Core,
12: RTC,
–
15: Resume
Description
Attribute:
Size:
Usage:
LPC Interface Bridge Registers (D31:F0)
Intel
R/W, WO
32-bit
ACPI or Legacy
®
®
ICH7 Family Datasheet
ICH7-M/ICH7-U will
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