Patent ID: 7007127

Claim:
A method for controlling a transmission interface between a computer system and an external device to manage data transmission, the computer system comprising: a host for controlling operation of the computer system; and a first connecting port for outputting and receiving a data compatible with a first format; the external device comprising: a second connecting port for receiving the data compatible with the first format transmitted from the first connecting port and transmitting the data compatible with the first format to the first connecting port; a bridge circuit comprising a first port and a second port, the first port electrically connected to the second connecting port, the bridge circuit transforming the data compatible with the first format received by the first port into corresponding data compatible with a second format and outputting the data compatible with the second format through the second port, the bridge circuit transforming the data compatible with the second format received by the second port into the corresponding data compatible with the first format and outputting the data compatible with the first format through the first port; a driver circuit for controlling operation of the external device according to the data compatible with the second format outputted from the second port of the bridge circuit; and a memory electrically connected to the driver circuit for storing transmission interface data, the host of the computer system transmitting the data compatible with the first format to the bridge circuit of the external device according to a specification defined by the transmission interface data; the method comprising: transmitting a control signal compatible with the second format from the bridge circuit to the driver circuit so that the driver circuit transmits the transmission interface data stored in the memory to the bridge circuit; and transmitting the transmission interface data compatible with the first format from the bridge circuit to the host so that the host transmits data compatible with the first format to the bridge circuit according to the transmission interface data.