| 摘要 |
PURPOSE:To process many data at a high speed by selecting one of buses received a communication permitting signal at the time of communication request to start transmission, and retransmitting immediately a received communication permission signal when no communication is requested. CONSTITUTION:Each communication node receives a data transmission request signal RS when the data transmission is started, a token is supervised by token receiving detection circuits TKNCHK0; TKNCHK1 and a bus receiving the token at first is selected by a selecting circuit SEL. The token of the selected bus is fetched once by the node, and after the data transmission from the node is finished, the token is transmitted on the bus after it is provided with a logical peceding node address. The token on the bus not selected and having no data transmission request is transmitted onto the bus immediately after the logical preceding node address is added thereto. |
