| 摘要 |
PURPOSE:To transfer a data without sending out address information by making each control device input a data which follows the head effective pattern, and sending out its pattern to the control device of the lower rank as an ineffective pattern. CONSTITUTION:When a data block is inputted from a host device, a start pattern positioned at the head of this data block is detected by a start pattern deciding circuit 10. Subsequently, when both an FF13 and 14 are set, an output of an AND gate 15 becomes ''1'' and an AND gate 16 becomes on, therefore, a data which follows an effective pattern in a data block on a ring connecting line is inputted to a data buffer 18 through the gate 16. On the other hand, when an effective pattern is detected and the output of the gate 15 becomes ''1'' thereby, an effective/ineffective converting circuit 12 is controlled, and an effective pattern is converted to an ineffective pattern and sent to the following device. |
