| 摘要 |
PURPOSE:To make sending of numerous bytes by one time of communication possible so as to realize data communication system from which an address/data discriminating signal line is eliminated, by constituting the data communication of an interruption requesting signal indicating the start of communication, serial clocks which are used as the references of data sending and data inputting, and serial data string synchronizing with the serial clocks. CONSTITUTION:Operations of one time of communication are composed of three steps. In the 1st step, an interruption requesting signal 4 indicating the start of communication from a host is outputted and each module becomes ready for an address inputting condition. In the 2nd step, each module inputs a serial clock 5 and address value 6 outputted from the host and discriminates whether the address is its own address or the address of another module which outputs required data, and then, sets up its outputting condition. In the 3rd step, data are outputted from the module 1 synchronizing with the serial clock 5 outputted from the host 5. By repeating the above-mentioned three steps, data communication between each module can be performed on the same communication line.
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