| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of improving use efficiency of a bus. SOLUTION: An internal processing module 311 detects the head of a first period repeated at a constant frequency. The internal processing module 311 outputs, when the head of the first period visits first after receipt of a bus use permission signal, the address of data that is a reading object to the bus 100 within a second period shorter than the first period. The module 311 inputs, after a lapse of a third period calculated by multiplying the period by a predetermined positive integer, data corresponding to the address which is output by a slave device to the bus 100 within a fourth period after reduction of the second period from the period successively to the third period. COPYRIGHT: (C)2008,JPO&INPIT
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