Patent ID: 8457268

Claim:
A communication system comprising a plurality of communication devices each of which is connected with a plurality of communication lines, the communication system comprising: a clock transmission means for sending a clock signal to a clock communication line by a master device, the master device is selected from the plurality of communication devices, the clock communication line is selected from the plurality of communication lines, the clock signal is used to synchronize the plurality of communication devices when sending and receiving data; a clock reception means for receiving the clock signal from the clock communication line, the clock signal is received by all of the communication devices, the all of the communication devices send and receive data through data communication lines, the data communication lines are selected from the plurality of communication lines excluding the clock communication line; and a data transmission/reception means for sending and receiving data through the data communication lines, the data is sent and received according to a reference timing, the reference timing is designated as a transmission/reception reference, the reference timing is determined by the time that the clock signal is received, wherein the master device comprises the clock reception means and the data transmission/reception means, and further comprises a single transceiver with which the clock transmission means sends a clock signal and the clock reception means receives the clock signal.