| 摘要 |
PROBLEM TO BE SOLVED: To provide a fault detection device capable of detecting a fault of a clocked buffer set in a multiplexer at the time of inspecting before the shipment without damaging a LSI chip or a rating device so that the input values of the multiplexer are reverse to each other. SOLUTION: Because the values of A and B in a multiplexer 13 are in a reversal state, a fault is detect by a special test bench by outputting whether the value is from a clocked buffer of the multiplexer 13 or a clocked buffer to an arbitrary terminal of a LSI chip, therefore a fault of the clocked buffer set in the multiplexer 13 can be detected at the time of inspecting before the shipment.
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