Control device for a usb interface and control method thereof

A control method, comprising:

• controlling a USB interface that includes a first terminal for inputting a data to be transmitted and a second terminal for the transmission of packet data on a bus, said packet data including an end-of-packet signal, said USB interface including a circuit for the transmission of data on said second terminal, said circuit being provided with a bias circuit, said USB interface being configured to receive a signal for the activation of said transmission circuit when data are received from said first terminal, said controlling including:
• detecting the end-of-packet signal;
• and
• activating the bias circuit of the transmission circuit in response to detecting the end-of-packet signal.

A Universal Serial Bus (USB) interface, comprising:

• a first terminal configured to input data to be transmitted;
• a second terminal configured to transmit packet data on a bus, said packet data including an end-of-packet signal;
• a transmission circuit configured to transmit data on said second terminal, said transmission circuit including a bias circuit;
• an activation input terminal configured to receive an activation signal for the activation of said transmission circuit when data are received at said first terminal:
• a detection circuit configured to detect an end-of-packet signal on said bus;
• and
• a control circuit configured to activate the bias circuit of the transmission circuit if said end-of-packet signal is detected by said detection circuit.