A method and a device are provided for waking up a MCU. The method includes: determining whether a second MCU is in a deep sleep state, when a first MCU triggers a communication event of transmitting data to the second MCU; and when the second MCU is in the deep sleep state, sending an interrupt wakeup signal to the second MCU via a wakeup pin connected between the first MCU and the second MCU, so as to wake up the second MCU.

An electronic device includes an appended module coupled to a core having a standby state comprising a first power supply circuit, a first clock and a circuit that recognizes multiple vocal commands timed by the first clock. The appended module includes a second power supply circuit independent of the first power supply circuit, a second clock independent of the first clock and having a frequency lower than that of the first clock, digital unit timed by the second clock including a sound capture circuit that delivers a processed sound signal, and a processing unit configured in order, in the presence of a parameter of the processed sound signal greater than a threshold, to analyze the content of the processed sound signal and to deliver, when the content of the sound signal comprises a reference pattern, an activating signal to the core that can take it out of its standby state.

Disclosed herein are techniques to enable remote discovery of connectivity capabilities and remote connection of devices in a power efficient manner. In particular, discovery and connection requests for connectivity capabilities utilizing a first radio may be communicated using a second radio, the second radio utilizing a lower amount of power relative to the first radio. For example, connectivity capabilities such as Wi-Fi, Wi-Fi Direct, WiGig, Zigbee can be discovered and connection request communicated using a Bluetooth radio.

Embodiments include apparatuses, methods, and systems including a communication device having a first transceiver to communicate with a first device through a first communication link, and a second transceiver to communicate with a second device through a second communication link. In addition, there may be a third communication link between the first device and the second device. For the communication device, the second transceiver may consume less power for the second communication link than a power the first transceiver consumes to communicate through the first communication link. The communication device may communicate a traffic with the first device via the second device, through the second and third communication links, using the second transceiver. Other embodiments may also be described and claimed.

An electronic device includes an appended module coupled to a core having a standby state comprising a first power supply circuit, a first clock and a circuit that recognizes multiple vocal commands timed by the first clock. The appended module includes a second power supply circuit independent of the first power supply circuit, a second clock independent of the first clock and having a frequency lower than that of the first clock, digital unit timed by the second clock including a sound capture circuit that delivers a processed sound signal, and a processing unit configured in order, in the presence of a parameter of the processed sound signal greater than a threshold, to analyze the content of the processed sound signal and to deliver, when the content of the sound signal comprises a reference pattern, an activating signal to the core that can take it out of its standby state.

Methods, systems, and devices for wireless communication are described. An access point (AP) may identify a jitter pattern for a wakeup message. A station may listen using a wakeup radio for a wakeup message during wakeup listening periods according to the identified jitter pattern. A station may receive a preamble having a first bandwidth and a wakeup message having a second bandwidth. An AP may transmit an identifier key to a station, and the station may determine a rotating identifier associated with the AP based on the received identifier key. The station may receive a wakeup message from the AP, compare a sender identifier with the rotating identifier, and power on a second radio. A station may also receive a wakeup message that includes an indication of which station are to be activated.

A method and an apparatus for controlling a sleep mode in a portable terminal having a main controller and a sub-controller operating at low power are provided. The method includes detecting, by the sub-controller, a motion signal generated by a camera when the main controller enters the sleep mode, extracting a motion pattern from the detected motion signal, determining whether the extracted motion pattern is substantially identical with a preset motion wake-up pattern, and cancelling the sleep mode by waking-up the main controller when the extracted motion pattern is substantially identical with the motion wake-up pattern.

A method and a terminal for reporting sensor data are provided. The method for reporting sensor data includes: when a processor needs to process only sensor data collected by a sensor, sending, by the processor, an indication that the processor is to enter a sleep state, and entering the sleep state; after the processor enters the sleep state, receiving and temporarily storing, by a sensor hub, the sensor data collected and reported by the sensor into an event information table, recording, by the sensor hub, corresponding time at which the sensor collects the sensor data, and further temporarily storing the time into the event information table; and when the processor is restored to a working state, reporting, by the sensor hub, the event information table to the processor, so that the processor parses the event information table to complete corresponding processing.

A low power wake on radio circuit detects if an RF signal is present on an input to the wake on radio circuit. An RF sense circuit supplies an RF sense signal indicating whether the RF signal is present on the input. The RF sense signal is used to incrementally turn on digital decode logic to determine if a radio transmission that is unique to the wake on radio circuit has been received. If the unique radio transmission have been received, the wake on radio circuit supplies a wakeup signal to the rest of the system.

A portable terminal having a wireless local area network (WLAN) communication module configured to perform wireless communication in a WLAN and a near field communication (NFC) module configured to read written data written to an integrated circuit (IC) tag includes: a memory configured to record format identification data for identifying a data format of the written data; and a control unit configured to detect whether the written data read using the NFC module has a predetermined format based on the format identification data, detect whether the written data is WLAN setup data for use in an imaging-apparatus-side WLAN module, and write command data for instructing to activate an access point (AP) function of the imaging-apparatus-side WLAN module to the IC tag using the NFC module when it is detected that the written data detected as having the predetermined format is the WLAN setup data.