1-22 Product Overview
Requirements for S4 support:
• O/S must be built on a system with S3 enabled in the BIOS
• Some peripherals may not be S4 capable, which can prevent the system from
entering S4 state.
• S5 (Unit OFF)
Reference the ACPI Specification for details.
Peripherals: ACPI defines power states for peripherals which are separate from the
system power state. The device power states range from D0 (fully-on) to D3 (off) It is the
responsibility of the driver developer for each peripheral to define and support the
available power states.
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