| 摘要 |
PROBLEM TO BE SOLVED: To prevent reception of defective command due to noise by keeping synchronization control between receiving sides without lowering data processing efficiency. SOLUTION: When noise is invaded on a second synchronous signal, an order of inputting to a reception port becomes "L/H"→"L/L"→"H/L"→"H/H". Since this is different from a normal order ( a first synchronous signal/second synchronous signal is "H/L"→"H/H"→"L/H"→"L/L") and since it is highly possible that noise is invaded by being influenced by something, and as a result, communication data are partially destroyed as well, collected communication data are invalidated. Thus, malfunction of control by a game sub control circuit can be prevented. COPYRIGHT: (C)2005,JPO&NCIPI
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