| 摘要 |
PURPOSE:To mount many circuit blocks on one substrate with a good efficiency in area by adjusting a bus request from the plural circuit blocks disposed on the same substrate by an internal common bus competition circuit part and performing the competition of an external busy by an external common bus competition circuit. CONSTITUTION:Only one of the circuit blocks 141-14n in the substrate 10 outputs the bus request. At this time, the competition is not generated, but the circuit block uses the internal common bus 12 and further the circuit block competes with the circuit block on other substrate for the external common bus 1 through the external common bus competition circuit 11. Then, when the plural circuit blocks of the circuit blocks 141-14n in the substrate 10 output the bus request, only the highest order one of the internal common bus competition circuits, for instance, of the circuit block having the request of the internal common bus competition circuits 131-13n obtains the priority, uses the internal common bus, uses the internal common bus competition circuit 11 and competes the internal common bus 1. |
