| 摘要 |
PURPOSE:To increase the reliability for transmission of data, by realizing an independent control through each controller for both the memory addressing and the writing of data into a memory when the data are exchanged. CONSTITUTION:Receiving an operation end signal e1=1 from a control signal circuit 8, a data exchange control circuit 15 changes a data exchange signal e2 into 1. The output of the signal e2 is sent to a control line BE2 in a link bus 10. Then the signal of the line BE2 changes to 1 when the signal e2 of a slave device is set to 1. A signal BE2 of the line BE2 is fetched into each device via a buffer 18 and then supplied to circuits 15 and 8. The circuit 15 starts an exchange of data when the signal E2 is equal to 1. Then synchronous signals t1 and t2 are exchanged with each other between a master device and a slave device. At the same time, each timing of the replacement of the address data ADD, the transmission of data and the reading of a mixture data MIX is controlled by each device itself in accordance with the slower speed of process. Thus the exchanging of data is carried out. |
