| 摘要 |
PURPOSE:To raise the using efficiency for a loop-shaped transmission line, by dividing a loop-shaped transmission line between subsystems into a transmission loop and a reception loop. CONSTITUTION:An interface device B of each subsystem detects the bus frame pattern BFP through a transmission loop TXL, and then inserts 1 into the prescribed bit position of the transmission request REQ allotted to the own subsystem if a transmission request is made. Then an address DA is monitored by a reception loop RXL, and the subsequent data are fetched for buffing when a coincidence is obtained between the address DA and the number of own subsystem. |
