| 摘要 |
PURPOSE:To change a mode of data transmission to a terminal device freely by using a function selection signal transmitted from the side of a data transmitter to the side of the terminal device. CONSTITUTION:When a function code shows a high-reliability data transmission mode, outputs of gate circuits 81 and 82 are supplied to a comparing circuit 10, which compares and collates data transmitted through two systems of transmission lines 111 and 112 mutually; when the comparing circuit 10 outputs a coincidence signal, a control circuit 7 detects it to switch the gate circuits 81 and 82, thereby outputting data to receiving buffers 91 and 92. When the function mode shows a high-speed data transmission mode, the data collation by the comparing circuit 10 is not performed and the output of the gate circuit 81 and that of the gate circuit 82 are supplied to the receiving buffer 92 alternately and outputted together. Further, when it shows an independent data transmission mode by those two systems, the receiving buffers generate outputs separately. |
