307013-003 Datasheet, PDF (426/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

LPC Interface Bridge Registers (D31:F0)
10.8.1.6
BM_BREAK_EN Register (PM—D31:F0) (Mobile/Ultra Mobile Only)
Offset Address:
Default Value:
Lockable:
Power Well:
ABh
00h
No
Core
Attribute:
Size:
Usage:
R/W
8-bit
ACPI, Legacy
Bit
Description
7
6
(Mobile
Only)
6
(Ultra
Mobile
Only)
5
4:3
2
1
0
IDE_BREAK_EN — R/W.
0 = Parallel IDE or Serial ATA traffic will not act as a break event.
1 = Parallel IDE or Serial ATA traffic acts as a break event, even if the BM_STS-
ZERO_EN and POPUP_EN bits are set. Parallel IDE or Serial ATA master activity
will cause BM_STS to be set and will cause a break from C3/C4.
PCIE_BREAK_EN — R/W.
0 = PCI Express* traffic will not act as a break event.
1 = PCI Express traffic acts as a break event, even if the BM_STS-ZERO_EN and
POPUP_EN bits are set. PCI Express master activity will cause BM_STS to be set
and will cause a break from C3/C4.
Reserved
PCI_BREAK_EN — R/W.
0 = PCI traffic will not act as a break event.
1 = PCI traffic acts as a break event, even if the BM_STS-ZERO_EN and POPUP_EN
bits are set. PCI master activity will cause BM_STS to be set and will cause a
break from C3/C4.
Reserved
EHCI_BREAK_EN — R/W.
0 = EHCI traffic will not act as a break event.
1 = EHCI traffic acts as a break event, even if the BM_STS-ZERO_EN and POPUP_EN
bits are set. EHCI master activity will cause BM_STS to be set and will cause a
break from C3/C4.
UHCI_BREAK_EN — R/W.
0 = UHCI traffic will not act as a break event.
1 = USB traffic from any of the internal UHCIs acts as a break event, even if the
BM_STS-ZERO_EN and POPUP_EN bits are set. UHCI master activity will cause
BM_STS to be set and will cause a break from C3/C4.
ACAZ_BREAK_EN — R/W.
0 = AC ‘97 or Intel^® High Definition Audio traffic will not act as a break event.
1 = AC ‘97 or Intel High Definition Audio traffic acts as a break event, even if the
BM_STS-ZERO_EN and POPUP_EN bits are set. AC ‘97 or Intel High Definition
Audio master activity will cause BM_STS to be set and will cause a break from
C3/C4.
NOTE: For ICH7-U Ultra Mobile, only Intel High Definition is supported, AC ‘97 is not
supported.
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Intel ^® ICH7 Family Datasheet