Patent ID: 11928074
Assignee: EVERPRO (WUHAN) TECHNOLOGIES COMPANY LIMITED
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A USB plug adapted for connection to a device, comprising:
a second transmitting unit, a second receiving unit, and a second control unit; wherein
the second transmitting unit comprises a second electrical input port, a second transmitting high-speed transmission circuit and a second output circuit; and
the second receiving unit comprises a second electrical output port, a second receiving high-speed transmission circuit and a second input circuit; and
the USB plug being connected to the device, the second transmitting unit and the second receiving unit are powered on and enter an initialization mode respectively; and
under the initialization mode, the second input circuit of the second receiving unit continuously detects whether a first optical signal is transmitted from another plug, while the second electrical output port-of the second receiving unit performs receiver termination detection at an interval of t0; when a low-impedance receiver termination (RRX-DC) is detected, the second control unit drives the second output circuit-to output the first optical signal and controls the second transmitting unit-to enter a transmission mode;
the operating mode of the USB plug further comprises a power saving mode;
wherein the second input circuit of the USB plug in the power saving mode conducts polling at an interval of t3, and when the second optical signal is detected, the USB plug remains in the power saving mode; and
the second receiving unit enters the transmission mode from the power saving mode to respond to the detection of the first optical signal by the second input circuit in the power saving mode; and
while the second transmitting unit enters the transmission mode, the second receiving unit also enters the transmission mode.