Pixart Imaging Incorporated

Chien Jung Huang

Hsiang Sheng Liu

Chih Yen Wu

Ming Tsan Kao

Chia Cheun Liang

Yu Han Chen

Chih Chung Tsai

Ching Chih Chen

There is provided a human interface device including a control chip and a plurality of control components. The control chip includes a voltage detection circuit coupled to the plurality of control components via a multiplexing pin and detects a voltage value on the multiplexing pin through the voltage detection circuit thereby identifying an operating state of the plurality of control components.

Human interface device

There is provided a mouse device including a control chip and at least one control component. The control chip includes a voltage detection circuit coupled to the at least one control component through at least one multiplexing pin and detects at least one voltage value on the at least one multiplexing pin using the voltage detection circuit thereby identifying an operating state of the at least one control component.

Mouse device

A frequency calibration method for a programmable oscillator includes the steps of: counting an oversampling number of an oversampling signal and estimating an accumulated bit number of a USB data stream according to the oversampling signal; calculating a difference between the oversampling number and M times of the accumulated bit number when the accumulated bit number is larger than a predetermined value; and determining a frequency calibration step of the oversampling signal according to the difference. The present invention further provides a frequency calibration device for a programmable oscillator.

Frequency calibration device and method for programmable oscillator

A frequency calibration method for a programmable oscillator includes the steps of: counting an oversampling number of an oversampling signal and estimating an accumulated bit number of a USB data stream according to the oversampling signal; calculating a difference between the oversampling number and M times of the accumulated bit number when the accumulated bit number is larger than or equal to a predetermined value; and determining a frequency calibration step of the oversampling signal according to the difference. The present invention further provides a frequency calibration device for a programmable oscillator.

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Hsin-Chu, Taiwan

Chien Jung Huang