| 摘要 |
PURPOSE:To process the information having higher priorities and to improve the transmitting efficiency of information through a common bus, by designating the priority of plural bus frames via a frame buffer part when these frames are concentrated to a specific module. CONSTITUTION:A descriptor field 22 is secured on a common bus 2 to transmit the additional information showing the priorities of the bus frames which are transferred among plural modules 1(0)-1(n). While these bus frames are stored successively in a frame buffer part 3 via a data/control field 21. Then a buffer control part 5 decodes the field 22 in response to an interruption signal (2) and those bus frames are selected in accordance with their priorities. At the same time, an interruption control part 6 is set and an interruption is produced at an MPU4. Then the bus frames are processed in the order of higher priorities. In such a way, plural bus frames can be processed with high efficiency even though these frames are concentrated to a single module 1(i). |
