31:14

0h

RO

Reserved (Rsvd)

13

0h

WO

Sleep Enable (SLP_​EN)

This is a write-only bit and reads to it always return a zero. Setting this bit causes the system to sequence into the Sleep state defined by the SLP_​TYP field.

12:10

0h

RW

Sleep Type (SLP_​TYP)

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 reset by RTCRST# only.
000: S0
001: Reserved
010: Reserved
011: Reserved
100: Reserved
101: S3
110: S4
111: S5

9:3

0h

RO

Reserved (Rsvd_​1)

2

0h

WO

GBL_​RLS (GBL_​RLS)

This bit is used by the ACPI software to raise an event to the BIOS software. BIOS software has a corresponding enable and status bits to control its ability to receive ACPI events. This bit always reads as 0.

1

0h

RW

BM_​RLD (BM_​RLD)

This bit is treated as a scratchpad bit.

0

0h

RW

SCI Enable (SCI_​EN)

Selects the SCI interrupt or the SMI# for various events. When this bit is 1, then the events will generate an SCI interrupt. When this bit is 0, these events will generate an SMI#.