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AssigneeCanon Kabushiki Kaisha
InventorsKaoru Sato, Toshiyuki Itoh, Kazuhiko Okazawa, Junichi Kimizuka, Akihisa Kusano, Makoto Abe, Toshihiko Inuyama
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The invention provides an interunit communication system which comprises a main unit and a plurality of subunits and executes a communication between the units by a microcomputer of each unit. The system comprises: power producing means, provided for each subunit, for producing a driving power for the microcomputer of the subunit by a power which is supplied from the main unit through a power line; resetting means, provided for each subunit, for resetting the microcomputer of the subunit in the case where the power supply was restarted after the power supply from the main unit had been shut off; detecting means, provided for the main unit, for detecting a runaway of the microcomputer of the subunit on the basis of a reception state from a signal line for communication; power shut-off means, provided for the main unit, for shutting off the power supply to the subunit when the detecting means detects the runaway of the microcomputer; and power restarting means for restarting the power supply to the subunit.
A method of resetting a subunit comprising the steps of:
An interunit communicating system comprising:
A main unit connected with at least one subunit through a power line, comprising:
Dependencies are inferred from the claim text.