MEANS FOR COMMUNICATION OF USB CHIP CARDS USING MAXIMUM OR HIGH SPEED TRANSFERS

摘要

P The present invention relates to a smart card capable of communicating with a central office in a standard universal serial bus (USB) protocol, via a USB compatible cable terminating in a read head / card connection, the card comprising: - a first contact point which receives a power signal from the exchange, - a second contact point which connects to the earth, - a third and a fourth contact point which cooperate to send and receive differential data signals, - an integrated circuit mode sending and receiving compatible data signals thanks to said third and fourth contact points, - a time stamping module having sufficient precision to time stamp at least one data transfer at maximum speed of USB signals. / P