Abstract: A circuit board includes a substrate and a metallic layer. A first area and at least one second area are defined on a portion of the substrate, the second area is located outside the first area. The metallic layer includes first test lines disposed on the first area and second test lines disposed on the second area. A first test pad of each of the first test lines has a first width, and a second test pad of each of the second test lines has a second width. The second width is greater than the first width such that probes of an electrical testing tool can contact the first and second test pads on the circuit board correctly during electrical testing.

Abstract: A method for managing threads and an electronic device using the method are provided. In the method, a current time is obtained. A time interval from now to a time for the processor to wake up next time is calculated. The processor is released until reaching the end of the time interval. When the end of the time interval is reached or a first notice signal of the processor is received, a first newest time is obtained to update a current time, and the current time is logged as a basis time. It is respectively checked whether the current time satisfies a plurality of predetermined time conditions of the registered threads against a plurality of registered threads in the threads. When the current time satisfies the predetermined time condition of a first registered thread among the registered threads, the first registered thread is waked up.

Abstract: An embodiment of the invention provides an orientation detection method for a portable device. The method comprises acquiring an accelerometer data, determining whether the portable device is in a flat status, determining whether the portable device is in a stable status, and when the portable device is determined in both the flat status and the stable status, stopping acquiring the accelerometer data until receiving an enable signal.

Abstract: An electronic device includes a sensing unit, a charge-and-discharge circuit, and a processing circuit. The processing circuit includes a control unit, a detecting unit, a determining unit, and an executing unit. The control unit provides a plurality of periodic pulses to the sensing unit and the charge-and-discharge circuit, such that they are charged and discharged periodically and output a sensing voltage. The sensing unit detects the sensing voltage, and determines a charging time according to the sensing voltage, wherein the charging time is a time at which the sensing voltage reaches a predetermined voltage. The determining unit determines whether to trigger an interrupt request according to the charging time. The executing unit performs a designated application when the interrupt request is received.

Abstract: A method for managing threads and an electronic device using the method are provided. In the method, a current time is obtained. A time interval from now to a time for the processor to wake up next time is calculated. The processor is released until reaching the end of the time interval. When the end of the time interval is reached or a first notice signal of the processor is received, a first newest time is obtained to update a current time, and the current time is logged as a basis time. It is respectively checked whether the current time satisfies a plurality of predetermined time conditions of the registered threads against a plurality of registered threads in the threads. When the current time satisfies the predetermined time condition of a first registered thread among the registered threads, the first registered thread is waked up.

Abstract: An audio jack for receiving an audio plug includes a connection hole with a position detection portion and a first audio channel contact portion therein. When the audio plug is inserted into the connection hole to the linking position, a first audio channel connection portion of the audio plug contacts the position detection portion and the first audio channel contact portion. The position detection portion and the first audio channel contact portion respectively have a first distance and a second distance to an opening of the connection hole, wherein the second distance is smaller than the first distance.

Abstract: An audio jack for receiving an audio plug includes a connection hole with a position detection portion and a first audio channel contact portion therein. When the audio plug is inserted into the connection hole to the linking position, a first audio channel connection portion of the audio plug contacts the position detection portion and the first audio channel contact portion. The position detection portion and the first audio channel contact portion respectively have a first distance and a second distance to an opening of the connection hole, wherein the second distance is smaller than the first distance.

Abstract: An embodiment of the invention provides an orientation detection method for a portable device. The method comprises acquiring an accelerometer data, determining whether the portable device is in a flat status, determining whether the portable device is in a stable status, and when the portable device is determined in both the flat status and the stable status, stopping acquiring the accelerometer data until receiving an enable signal.

Abstract: An electronic device includes a sensing unit, a charge-and-discharge circuit, and a processing circuit. The processing circuit includes a control unit, a detecting unit, a determining unit, and an executing unit. The control unit provides a plurality of periodic pulses to the sensing unit and the charge-and-discharge circuit, such that they are charged and discharged periodically and output a sensing voltage. The sensing unit detects the sensing voltage, and determines a charging time according to the sensing voltage, wherein the charging time is a time at which the sensing voltage reaches a predetermined voltage. The determining unit determines whether to trigger an interrupt request according to the charging time. The executing unit performs a designated application when the interrupt request is received.