| 摘要 |
PURPOSE:To efficiently perform data transfer at the time of coupling buses with a few amount of delay, by changing the priority order of a bus occupancy request corresponding to the activity status of the bus in a coupling device, and accelerating the data transfer within the range of the bus occupancy ratio of the coupling device set in advance. CONSTITUTION:Both buses (a) and (b) are connected with bus couplers 10a and 10b provided with a counter means 15 which counts an arrival data per unit time, a threshold value holding means 16 which holds a threshold value set in advance, and a comparison means 17. And by changing the priority order of the bus occupancy request from a high order to a low order corresponding to the activity status, the data transfer can be accelerated within the range of the bus occupancy ratio of the bus couplers 10a and 10b. In such a way, it is possible to perform the data transfer efficiently at the time of coupling the buses with simple constitution and with a few amount of delay efficiently. |
