High Tech Computer Corporation

Tzu-Hsun Tung

Yu-Chun Peng

Ching-Hsiang Chang

Hsi-Cheng Yeh

Wen-Whah Tsai

Kuo-Bing Fang

An apparatus for data input. The apparatus comprises a sensing circuit for a plurality of keys, outputting an interruption signal and a corresponding group of data bits when one of the keys is pressed, a shift register circuit receiving a strobe signal, a clock signal and the group of data bits in parallel from the sensing circuit when the strobe signal is asserted, and serially outputting the group of data bits in synchronization with the clock signal, and a microcontroller receiving the interruption signal, outputting the strobe signal and clock signal when the interruption signal is asserted, and serially receiving the group of data bits from the shift register circuit to identify the key being pressed.

Apparatus for data input and key detection method thereof

A method for power management of a smart phone. The method comprises steps of resetting the smart phone, searching for network service, operating the mobile phone system in standby mode and a PDA system in normal mode when connected to a network, switching the mobile phone system to connection mode when establishing communication with a remote terminal, switching the mobile phone system to sleep mode when the mobile phone system has been idle for a first time period, switching the PDA system to sleep mode when the PDA system has been idle for a second time period, and implementing power detection to switch the mobile phone and PDA system to off mode when the detected power is lower than a first and second threshold respectively.

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Taipei, Taiwan

Tzu-Hsun Tung