User guide

ECW-281B-D2550 Embedded System
Page 53
5.3.1 ACPI Settings
The ACPI Settings menu (BIOS Menu 3) configures the Advanced Configuration and
Power Interface (ACPI) options.
Aptio Setup Utility – Copyright (C) 2011 American Megatrends, Inc.
Advanced
ACPI Settings
ACPI Sleep State [S1 (CPU Stop Clock)]
S
elect the highest ACPI
sleep state the system
will enter when the
SUSPEND button is
pressed.
----------------------
 : Select Screen
↑ ↓: Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
Version 2.14.1219. Copyright (C) 2011 American Megatrends, Inc.
BIOS Menu 3: ACPI Configuration
 ACPI Sleep State [S1 (CPU Stop Clock)]
Use the ACPI Sleep State option to specify the sleep state the system enters when it is
not being used.

Suspend Disabled

S1 (CPU Stop
Clock)
DEFAULT
The system enters S1(POS) sleep state. The
system appears off. The CPU is stopped; RAM is
refreshed; the system is running in a low power
mode.

S3 (Suspend to
RAM)
The caches are flushed and the CPU is powered
off. Power to the RAM is maintained. The
computer returns slower to a working state, but
more power is saved.