摘要:
A serial interface engine generates a series of digital data according to a pair of differential signals received from a high-speed Universal Serial Bus host and/or a full-speed universal serial bus host. Then, a packet identification (PID) unit identifies a packet identification of a start of each frame and a first period between two consecutive packet identifications according to the series of digital data. A count comparator is used for generating a calibration signal to calibrate an output frequency of an oscillator according to the first period.
摘要:
A serial interface engine generates a series of digital data according to a pair of differential signals received from a high-speed Universal Serial Bus host and/or a full-speed universal serial bus host. Then, a packet identification (PID) unit identifies a packet identification of a start of each frame and a first period between two consecutive packet identifications according to the series of digital data. A count comparator is used for generating a calibration signal to calibrate an output frequency of an oscillator according to the first period.
摘要:
A USB 3.0 host with low power consumption includes a super speed circuit, a non-super speed circuit, and a control module. The super speed circuit is used for transmitting data at a first transmission speed. A default state of the super speed circuit is turning-off. The non-super speed circuit is used for transmitting data at a second transmission speed, a third transmission speed, or a fourth transmission speed. The first transmission speed is faster than the second transmission speed, the third transmission speed, and the fourth transmission speed. The control module is used for detecting whether a USB peripheral device is connected to the USB 3.0 host, and controlling turning-on and turning-off of the super speed circuit.