Communication device for synchronized serial communication

U.S. Patent Number: 5737630

Abstract: In order to shorten time needed for communication and alleviate the processing load of the handshake procedure, a master CPU and a slave CPU perform an exchange of data utilizing a first data line and a second data line. A key word is entered in a communication message to the master CPU from the slave CPU requesting initialization be performed. An initialization request from the slave CPU to the master CPU is performed with a key word accompanying a communication error from the slave CPU. The master CPU initializes the slave CPU and synchronizes with it by utilizing a request line, and a reply line only when the master CPU power is turned on or when a communication error occurs including the request for initialization by means of the key word.

Inventors: Kobayashi; Masayuki (Anjo, JP)

Assignee: Nippondenso Co., Ltd. (Kariya, JP)

Application Number: 08/515,571

Issued: 1998-04-07

Expired: 2006-04-07

Classes: 712/29 ; 700/3; 709/208

Field of search: 395/800,181,200.05,800.29,800.31,200.38 364/132,230.4,DIG.1

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