Patent ID: 8880763

Claim:
An electronic device comprising: a first lower layer control unit; a second lower layer control unit; an upper layer control unit configured to communicate with the first lower layer control unit through a first communication line and communicate with the second lower layer control unit through a second communication line, wherein the first lower layer control unit and the second lower layer control unit are controlled by the upper layer control unit; and a reset unit configured to reset the first lower layer control unit and the second lower layer control unit, wherein the upper layer control unit is further configured to: (i) monitor communication through the first communication line and communication through the second communication line for failure, (ii) transmit monitoring data, indicating that communication is being performed normally, to at least one of the first lower layer control unit and the second lower layer control unit at a predetermined time interval when a failure is not found by monitoring the first communication line and the second communication line, and (iii) stop transmission of the monitoring data when a failure is found by monitoring the first communication line and the second communication line, and wherein one of the first lower layer control unit and the second lower layer control unit inputs a monitoring signal to the reset unit in response to receiving the monitoring data, and wherein the reset unit resets the first lower layer control unit and the second lower layer control unit if a prescribed time elapses without the monitoring signal being input.