Control apparatus

A control apparatus that bidirectionally communicates with a control unit based on a preset time-sharing method, the apparatus comprising:

• a plurality of devices each installed on a different substrate, wherein a substrate is a printed circuit board;
• a communication controller daisy-chained to the control unit via a bus line through which bidirectional communication of communication data is performed, the communication data having a data structure having a band in which data to be communicated between the plurality of devices is superimposable;
• and
• a cable configured to connect at least one device of the plurality of devices to the communication controller,
• wherein each of the communication data of the bidirectional communication has a data structure having a first band and a second band, the second band contains data indicating identification information with which a destination communication controller can be identified, and the first band contains data to be used by a destination device,
• the cable has a first power line to which a power supply voltage to be supplied to the plurality of devices is applied, a second power line to which a ground potential is applied, a signal line for use to transmit the data, and a control line for use to transmit a clock signal,
• the second power line is arranged to cover a periphery of a line group including the first power line, the signal line, and the control line,
• the communication controller is installed on the same substrate as a device of the plurality of devices that is other than the at least one device connected by the cable, and
• transmission and reception of data between the communication controller and the other device, the communication controller and the other device being installed on the same substrate, is performed via a pattern formed on the substrate.