| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain efficient data transfer when a receiver side data processing speed is slower than that of a transmitter side data processing means by interconnecting data processing means of a transmitter and a receiver side with two communication lines and grasping a state of the receiver side data processing means to transfer data. SOLUTION: A data transmitter 1 at a transmitter side and a data processing unit 3 at a receiver side are interconnected by two communication lines. The one line is a transmission data serial communication line 5 from the data transmitter 1 at the transmitter side to the data processing unit 3 at the receiver side and the other line is a state data serial communication line 7 for a data processing unit to inform a state of the receiver side data processing unit from the data processing unit 3 at the receiver side to the data transmitter 1 at the transmitter side. The data transmitter 1 at the transmitter side discriminates whether or not data are to be sent continuously depending on a state of the receiver side data processing unit sent from the data processing unit 3 at the receiver side. When state data of the receiver side with a transmission inhibit set thereto are transferred to the transmitter side, the transmission data with the transmission inhibit flag set thereto are transferred.</p> |
