| 摘要 |
PROBLEM TO BE SOLVED: To realize the speed-up of a bus cycle. SOLUTION: Registers Ra 11, Rb 12, Rc 13, Rd 14 for limiting currents allowed to flow into respective devices (A) 1, (B) 2, (C) 3, (D) 4 are connected to a data bus, and in the case of switching the bus cycle of respective devices 1 to 4, the bus cycle is switched without setting up an idle cycle for preventing the collision of bus signals.
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