Connection interface conversion chip, connection interface conversion device and operation method

A connection interface conversion device, comprising:

• a universal serial bus connector;
• a display port connector;
• and
• a connection interface conversion chip, comprising:
• a universal serial bus interface circuit, suitable for coupling to the universal serial bus connector;
• a display port interface circuit, coupled to a display port sink device through a display port connector;
• a universal serial bus core circuit, coupled to the universal serial bus interface circuit and the display port interface circuit;
• and
• a switching circuit, coupled to the universal serial bus interface circuit and the display port interface circuit, wherein the switching circuit supports only one specific conduction mode that only allows transmitting display port signals between the universal serial bus interface circuit and the display port interface circuit no matter whether the switching circuit is reconfigured,
• wherein in a first operation mode, at least one universal serial bus signal pair received by the universal serial bus connector is transmitted to the universal serial bus core circuit through the universal serial bus interface circuit, the at least one universal serial bus signal pair is decoded to generate a first display port data by the universal serial bus core circuit, and the first display port data is transmitted to the display port connector by the display port interface circuit;
• and
• wherein in a second operation mode, at least one second display port data received by the universal serial bus connector is transmitted to the display port connector through the universal serial bus interface circuit, the switching circuit and the display port interface circuit.

An operation method of a connection interface conversion chip, the connection interface conversion chip comprising a universal serial bus interface circuit, a display port interface circuit, a universal serial bus core circuit and a switching circuit, the universal serial bus interface circuit being suitable for coupling to a universal serial bus connector, the display port interface circuit being s coupled to a display port sink device through a display port connector, the operation method comprising:

• in a first operation mode, transmitting at least one universal serial bus signal pair received by the universal serial bus connector to the universal serial bus core circuit through the universal serial bus interface circuit, decoding the at least one universal serial bus signal pair to generate a first display port data by the universal serial bus core circuit, and transmitting the first display port data to the display port connector by the display port interface circuit;
• and
• in a second operation mode, transmitting at least one second display port data received by the universal serial bus connector to the display port connector through the universal serial bus interface circuit, the switching circuit and the display port interface circuit, wherein the switching circuit supports only one specific conduction mode that only allows transmitting display port signals between the universal serial bus interface circuit and the display port interface circuit no matter whether the switching circuit is reconfigured.