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Sleep mode (or suspend to RAM) is a low power mode for electronic devices such as computers, televisions, and remote controlled devices.These modes save significantly on electrical consumption compared to leaving a device fully on and, upon resume, allow the user to avoid having to reissue instructions or to wait for a machine to boot.
Sleep occurs in repeating periods, during which the body alternates between two distinct modes: REM and non-REM sleep. Although REM stands for "rapid eye movement", this mode of sleep has many other aspects, including virtual paralysis of the body. [2]
Sleep mode and hibernation can be combined: the contents of RAM are copied to the non-volatile storage and the computer enters sleep mode. This approach combines the benefits of sleep mode and hibernation: The machine can resume instantaneously, and its state, including open and unsaved files, survives a power outage.
The computer is running and the CPU executes instructions. "Away mode" is a subset of S0, where monitor is off but background tasks are running. G1 Sleeping S0ix Modern Standby, [34] or "Low Power S0 Idle". Partial processor SoC sleep. [35] [36] Sub states include S0i1, S0i2 and S0i3. Known to ARM and x86 devices. S1
DevSlp or DevSleep (sometimes referred to as device sleep or SATA DEVSLP) is a feature in some SATA devices which allows them to go into a low power "device sleep" mode when sent the appropriate signal, which uses one or two orders of magnitude less power than a traditional idle (about 5 mW, [1] but some drives can get as low as 2.5 mW [2]).
Rapid eye movement sleep (REM sleep or REMS) is a unique phase of sleep in mammals (including humans) and birds, characterized by random rapid movement of the eyes, accompanied by low muscle tone throughout the body, and the propensity of the sleeper to dream vividly.
SpotPass was a Nintendo 3DS and Wii U "always on" online background connectivity system, similarly to how predecessor WiiConnect24 originally functioned with Wii, which could automatically seek and connect to wireless network nodes such as Wi-Fi hotspots, sending and downloading information in the background while in sleep mode or while playing a game or running an application.
Sample hypnogram showing one sleep cycle (the first of the night) from NREM through REM. The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep. It is sometimes called the ultradian sleep cycle, sleep–dream cycle, or REM-NREM cycle, to distinguish it from the circadian alternation between sleep and ...