| 摘要 |
PURPOSE:To improve the efficiency of transmission and to reduce the time for transmission of a large quantity of data, by providing a circuit which latches the received data, a circuit which produces an output confirming signal to confirm whether a control data is delivered to outside, etc. to a terminal device. CONSTITUTION:A cyclic call is given to plural terminal devices 2 from a main control board, and the control data is transferred to these called devices 2. Then the control data is delivered to an external device 4 from the terminal 2. The control data received at a latching circuit 11 of the device 2 is latched by an access signal AC of a reception reply circuit 10 and then delivered to the terminal 4. At the same time, a control signal is latched to the circuit 11 through a timing control circuit 12, and a delay signal is delivered from the device 4. In this case, the output timing of a data output signal is produced to control a confirming circuit 13. The circuit 13 produces a confirming signal to show that the control data is transmitted to the device 4 through the circuit 13. This confirming signal is sent back to the main control board. Thus the efficiency of transmission is improved. |
