| 摘要 |
PURPOSE:To eliminate an address data which shows the kind of data and to enhance the efficiency of communication between computers by transmitting and receiving each data of communication synchronizing with a timing signal. CONSTITUTION:The first means 100 of a communication equipment of a micro computer for an automobile generates first and second timing signals S1 and S2 synchronizing with the rotation of engine and the respective signals S1 and S2 are supplied to micro computers 200 and 300. The second means (counter) 21 and 31 of the computers 200 and 300 are reset respectively by the signal S1 so as to count the signal S2. In the third means 22 and 33 of the respective computers 200 and 300 the value of the means 21 and 31 is correlated with the kind of transmitted data to transmit. Moreover in the fourth means 23 and 32 of the respective computers the kind of received data is decided corresponding to the count value of the means 21 and 31. And transmission and reception are executed corrsponding to the timing synchronizing with the rotation of the engine. |
