| 摘要 |
PURPOSE:To make high-efficiency data transmission possible, by executing high- level transmission control procedures due to the logical operation circuit, which consists of one FF, three AND elements, and one NOT element, to control the timing of data transmission and receiving. CONSTITUTION:Transmission control part 4 and receiving control part 5 of the communication line are connected to data processing part 1 through frame transmission control circuit 2. FF6 for holding the transfer state is connected to frame transmission control circuit 2. AND elements 9 and 10 for controlling respective state transition at the frame transmission request time and the frame receiving report time, AND element 11 for normalcy decision of the frame receiving report, and NOT element 8 for normalcy decision of the frame transmission request are connected to FF6 to constitute a logical operation circuit. As a result, the timing of data transmission and receiving is controlled to transmit data with a high efficiency. |
