ACPI: Power Management

ACPI: Advanced Configuration & Power Interface

ACPI分別對系統(Gx), 周邊裝置(Dx), 睡覺層級(Sx), CPU(Cx) 定義電源層級, 如下

1. Gx (Global state, 整個系統) :

• G0 = Working state (C0~C3)
• G1 = Sleeping state (S2~S4)
• G2 = Soft off (S5)正常關機，電源還插著因此主機板還有standby power，可被外部如LAN喚醒開機
• G3 = 拔電源(Mechanical off)

2. Dx (Device state, 周邊設備) :

• D0 = 正常運作
• 耗電 D1 > D2
• D3 = 斷電

ACPI: APEI (ACPI Platform Error Interfaces)

ACPI: OS和Bios溝通的介面，APCI定義有3個Runtime元件(ACPI Registers/ACPI Bios/ACPI Tables)

OSPM: 支援ACPI規範的OS
ACPI Bios: 支援ACPI規範的Bios