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Host wants to wake device up. K ≥ 20 ms then EOP pattern Resume (device) Device wants to wake up. (Must be in idle for at least 5 ms.) Device drives K ≥ 1 ms Host then sends a resume signal. Keep alive Host wants to tell low speed device to stay awake. EOP pattern once every millisecond. —
A sunrise alarm clock is a device that incorporates a clock, a lamp, and (usually) a sound machine to wake you up with a simulated sunrise with or without an accompanying audible signal.
The module supports USB suspend, resume and remote wake-up operations and can be configured for up to eight input and eight output endpoints. The module includes an integrated physical interface (PHY); a phase-locked loop (PLL) for USB clock generation; and a flexible power-supply system enabling bus-powered and self-powered devices.
A dawn simulator can be used as an alarm clock. Light enters through the eyelids triggering the body to begin its wake-up cycle, including the release of cortisol, so that by the time the light is at full brightness, sleepers wake up on their own, without the need for an alarm. Most commercial alarm clocks include a "dusk" mode as well for bedtime.
Wake-on-Ring (WOR) or Wake-on-Modem (WOM) is a specification that allows supported computers and devices to "wake up" or turn on from a sleeping, hibernating or "soft off" state (e.g. ACPI state G1 or G2), and begin operation.
up to 1024 KB flash memory and 256 KB SRAM, 6 KB EEPROM; up to 120 MHz system clock; 2.9–3.6 V supply voltage; 360 uA/MHz active power and 1.29uA in hibernate RTC mode; up to 90 GPIO pins in 15 blocks with some supporting fast-toggle operation, all supporting interrupt, some support wake-up from hibernate; USB host, device and OTG peripheral
The device consists of a 2.8" LCD screen to display the time and other metrics, as well as a large light-up dial which can be used to navigate menus. As a ‘smart’ alarm clock it has a 2.4 GHz WiFi connectivity for firmware and content download.
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