82801FB Datasheet, PDF (701/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

PCI Express* Configuration Registers
19.1.42
PMC—PCI Power Management Capabilities Register
(PCI Express—D28:F0/F1/F2/F3)
Address Offset: A2–A3h
Default Value: C802h
Attribute:
Size:
RO
16 bits
Bit
Description
15:11
10
9
8:6
5
4
3
2:0
PME_Support (PMES) — RO. This field indicates PME# is supported for states D0, D3_HOT and
D3_COLD. The root port does not generate PME#, but reporting that it does is necessary for some
legacy operating systems to enable PME# in devices connected behind this root port.
D2_Support (D2S) — RO. The D2 state is not supported.
D1_Support (D1S) — RO The D1 state is not supported.
Aux_Current (AC) — RO. Reports 375 mA maximum suspend well current required when in the
D3_COLD state.
Device Specific Initialization (DSI) — RO. This bit indicates that no device-specific initialization is
required.
Reserved
PME Clock (PMEC) — RO. This bit indicates that PCI clock is not required to generate PME#.
Version (VS) — RO. This field indicates support for Revision 1.1 of the PCI Power Management
Specification.
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
701