摘要:
An input circuit shared by multi signal sources each of which outputting a type of signals includes a processing unit (10). The processing unit includes a plurality of input pins (11) and an interrupt pin (12), each of the input pins connecting with one or more of the signal sources and receiving signals from the signal sources. The input circuit further includes a tristate buffer (30) The tristate buffer includes an enable pin (33) enabling the tristate buffer upon receiving an enable signal, a plurality of input pins (31) connecting with one or more of the signal sources and receiving signals from the signal sources, and a plurality of output pins (32) connecting with the interrupt pin of the processing unit and producing an interrupt signal to the interrupt pin according to the signals received at the input pins. A related wake-up signal input circuit is also provided.
摘要:
A digital photo frame with automatic backup function includes a storage unit; an interface for connecting with an external storage device; and a processing unit. The processing unit includes a detecting module for detecting whether the interface is connected with the external storage device; an obtaining module for obtaining an identification number of the connected external storage device; a search module for searching for a folder corresponding to the external storage device in the storage unit, according to the identification number of the external storage device; a reading module for reading files from the external storage device; and a backup module for backingup the files to the corresponding folder when the search module finds the corresponding folder. Related methods of automatic file backup are also provided.
摘要:
An exemplary output property adjusting apparatus includes a first display area, a second display area, a third display area, a scroll bar, and a micro controller unit (MCU). The first display area is for displaying data files. The second display area is for displaying output properties in a property select mode. The third display area is for displaying at least two adjustable attribute values of a selected output property in a property adjust mode. The MCU applies the selected adjustable attribute value to the selected output property, in response to adjustment operational inputs through the scroll bar. A related output property adjusting method is also provided.
摘要:
An exemplary light circuit includes a light unit (7) that includes a plurality of light branches (L1, L2 . . . and Ln) connected in parallel; an ambient light detector (9) for detecting an ambient luminance; an ambient light switch (101) for enabling/disenabling the ambient light detector; a control unit (3) for producing PWM waves with a particular duty cycle according to the detected ambient luminance; and a switching circuit (6) for alternatively switching on and off the light unit according to the PWM waves. An exemplary electronic book (1) configured with the lighting circuit is also provided.
摘要:
An exemplary method for conserving power of a portable communication device includes: supplying voltage by a power supply; distributing voltages to other units of the portable communication device including a communication unit and a backlight unit; the portable communication device entering a normal mode after being powered by one of the voltages; generating digital voltage signals corresponding to the voltage supplied by the power supply; detecting a voltage of the digital voltage signals to obtain a detected voltage; comparing the detected voltage with a predetermined value; and if the detected voltage is equal to or less than the predetermined value, changing from the normal mode to a power conserving mode, and stopping distribution of the voltages to at least one of the communication unit and the backlight unit. Thereby, an operational time of other units of the portable communication device can be prolonged.
摘要:
A light circuit includes a light unit (7), a control unit (3), a differentiating circuit (4) and a switching circuit (6). The light unit includes a plurality of light branches (L1, L2 . . . and Ln) connected in parallel. The light branches are controlled to light by the switching circuit that is enabled and disabled by PWM waves from the control unit. The PWM waves are differentiated into differentiated waves by the differentiating circuit before outputted to control the switching circuit.
摘要:
An input circuit shared by multi signal sources each of which outputting a type of signals includes a processing unit (10). The processing unit includes a plurality of input pins (11) and an interrupt pin (12), each of the input pins connecting with one or more of the signal sources and receiving signals from the signal sources. The input circuit further includes a tristate buffer (30) The tristate buffer includes an enable pin (33) enabling the tristate buffer upon receiving an enable signal, a plurality of input pins (31) connecting with one or more of the signal sources and receiving signals from the signal sources, and a plurality of output pins (32) connecting with the interrupt pin of the processing unit and producing an interrupt signal to the interrupt pin according to the signals received at the input pins. A related wake-up signal input circuit is also provided.
摘要:
A preferred embodiment of a method of this invention includes the steps of: connecting the portable input device to a computer; changing a configuration pointer of the computer from pointing to computer configuration data of the computer to pointing to a selected computer configuration data of the portable input device, and, simultaneously, changing a disk pointer of the computer from pointing to a main data storage of the computer to pointing to a data storage of the portable input device; obtaining the selected computer configuration data and at least one predetermined folder; changing the configuration data pointer of the computer from pointing to the computer configuration data of the portable input device to pointing to the preferred computer configuration data of the computer, and simultaneously, resetting the disk pointer of the computer when the connection between the computer and the portable input device is disabled.
摘要:
A touch sensing apparatus includes a sensor (13), an AC signal source (14), a gate circuit (15) with two inputs, a first load circuit (18), a second load circuit (19) and a detector (16). The alternating current (AC) signal source is for outputting AC signals to the two input of the gate circuit. The sensor and the first and second load circuits are configured to enable the input signals to the two inputs of the gate circuit to be completely in phase and have same frequency and same duty cycle, and the gate circuit produces the first output type signal. The sensor receives electricity signals from the object and results in the gate circuit outputting a second output type signal. The detector detects the change of the output signal of the gate circuit from the first type to the second type and accordingly identifies a touch on the sensor.
摘要:
A method for obtaining technical information of IC is disclosed. The method provides an IC, a test board, and a computer. The IC includes a memory. The memory stores technical information. Connect the IC to the test board. Connect the test board to the computer. The computer obtains the technical information from the memory of IC. Using this method, engineers can find the technical information of the IC conveniently and correctly.