Patent ID: 8301969

Claim:
A transmitter connected to a receiver through a transmission line, the receiver including a reception unit to receive data and redundant data for detecting an error of the data, a detection unit to detect an error of the received data or redundant data, and a storage control unit to write the received data in a history storage unit in an chronological order according to a first bit or a second bit contained in the redundant data in which an error is detected by the detection unit, the transmitter comprising: a first inverting circuit to invert the first bit when stopping writing the data received by the receiver in the history storage unit which provides history information used for debug to trace a cause of an abnormal operation or a failure; a second inverting circuit to invert the second bit when starting writing the data received by the receiver in the history storage unit; and a transmission unit to transmit the data and the redundant data including either one of the first bit inverted by the first inverting circuit or the second bit inverted by the second inverting circuit to the receiver through the transmission line.