82801FB Datasheet, PDF (403/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

LPC Interface Bridge Registers (D31:F0)
10.8.3 Power Management I/O Registers
Table 10-11 shows the registers associated with ACPI and Legacy power management support.
These registers are enabled in the PCI Device 31: Function 0 space (PM_IO_EN), and can be
moved to any I/O location (128-byte aligned). The registers are defined to be compliant with the
ACPI 2.0 specification, and use the same bit names.
Note: All reserved bits and registers will always return 0 when read, and will have no effect when written.
Table 10-11. ACPI and Legacy I/O Register Map
PMBASE
+ Offset
00–01h
02–03h
04–07h
08–0Bh
0C–0Fh
10h–13h
14h
15h–16h
15h
16h
17–1Fh
20h
20h
28–2Bh
2C–2Fh
Mnemonic
PM1_STS
PM1_EN
PM1_CNT
PM1_TMR
—
PROC_CNT
LV2
—
LV3
LV4
—
—
PM2_CNT
GPE0_STS
GPE0_EN
Register Name
PM1 Status
PM1 Enable
PM1 Control
PM1 Timer
Reserved
Processor Control
Level 2
Reserved (Desktop Only)
Level 3 (Mobile Only)
Level 4 (Mobile Only)
Reserved
Reserved (Desktop Only)
PM2 Control (Mobile Only)
General Purpose Event 0 Status
General Purpose Event 0
Enables
30–33h
SMI_EN
SMI# Control and Enable
34–37h
38–39h
3A–3Bh
3C–43h
44–45h
46h–4Fh
50h
50h
51h–5Fh
54h–57h
60h–7Fh
SMI_STS
SMI Status
ALT_GP_SMI_EN Alternate GPI SMI Enable
ALT_GP_SMI_STS Alternate GPI SMI Status
—
Reserved
DEVACT_STS Device Activity Status
—
Reserved
—
SS_CNT
Reserved (Desktop Only)
Intel SpeedStep^® Technology
Control (Mobile Only)
—
Reserved
C3_RES (Mobile
Only)
C3-Residency Register
—
Reserved for TCO
ACPI Pointer
Default
Type
PM1a_EVT_BLK
0000h
R/WC
PM1a_EVT_BLK+2 0000h
R/W
PM1a_CNT_BLK 00000000h R/W, WO
PMTMR_BLK
xx000000h
RO
—
—
—
P_BLK
00000000h R/W, RO, WO
P_BLK+4
00h
RO
—
—
—
P_BLK+5
00h
RO
P_BLK+6
00h
RO
—
—
—
—
—
—
PM2a_CNT_BLK
00h
R/W
GPE0_BLK
00000000h R/W, R/WC
GPE0_BLK+4
00000000h
R/W
00000000h
R/W, WO,
R/W (special)
00000000h R/WC, RO
0000h
R/W
0000h
R/WC
—
—
—
0000h
R/WC
01h
R/W (special)
—
—
—
—
00000000h RO, R/W
—
—
—
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
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