Exchange of data signals between a central unit and peripheral devices using a peripherals devices input-output card having multi-protocol input

摘要

The data input-output card includes an access (23) to a universal serial bus (USB). This access is designed to receive data according to several different protocols using only two data conductors (27,28). The card includes means (21) for detecting the presence of a positive potential on a third conductor (26) for USB access (23). The two data conductors (27,28) from the USB access are each connected to at least two inputs (D+,D-,TxD,RxD,I+,I-) of a processor (25) which processes the data. The processor (25) detects the protocol of the transmitted data received by the USB access (23)..