Device context is assumed lost, and there is no need for any of it to be preserved in hardware. This state should consume the minimum power possible. Power can be removed from the device while in D3. If power is removed, the device will receive a bus-specific hardware reset upon reapplication of power, and should initialize itself as in a normal power on. Default Power Management Policy Present State Next State Cause D0 D3 Device determined by the operating system to not be needed by any applications or the user.
System enters a sleeping state.
D3 D0 Device determined by the operating system to be needed by some application or the user. There are no default wake events, because knowledge of the device is implicit in servicing such events. All devices must support the D0 and D3 states. Functionality available in D0 must be available after returning to D0 from D3 without requiring a system reboot or any user intervention. This requirement applies whether or not power is removed from the device during D3.