Invention Grant
US08656205B2 Generating reference clocks in USB device by selecting control signal to oscillator form plural calibration units
有权
通过从多个校准单元中选择振荡器的控制信号，在USB设备中生成参考时钟
- Patent Title: Generating reference clocks in USB device by selecting control signal to oscillator form plural calibration units
- Patent Title (中): 通过从多个校准单元中选择振荡器的控制信号，在USB设备中生成参考时钟
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Application No.: US13007663Application Date: 2011-01-16
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Publication No.: US08656205B2Publication Date: 2014-02-18
- Inventor: Chun-Liang Chen , Yi-Le Yang , Yu-Cheng Lo
- Applicant: Chun-Liang Chen , Yi-Le Yang , Yu-Cheng Lo
- Applicant Address: TW Science-Based Industrial Park, Hsin-Chu
- Assignee: JMicron Technology Corp.
- Current Assignee: JMicron Technology Corp.
- Current Assignee Address: TW Science-Based Industrial Park, Hsin-Chu
- Agent Winston Hsu; Scott Margo
- Main IPC: G06F1/06
- IPC: G06F1/06
Abstract:
A USB device with a clock calibration function and a method for calibrating reference clocks of a USB device are provided. A USB 2.0 initial calibration is performed on the USB device in order to control an embedded oscillator (EMOSC) of the USB device to output a first reference clock compliance USB 2.0 specification and USB 3.0 specification during the initialization phase. After that, a USB 3.0 on-line calibration is performed on the USB device in order to control the EMOSC of the USB device to calibrate a second reference clock during a super-speed mode of USB 3.0 specification.
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