| 摘要 |
PROBLEM TO BE SOLVED: To improve accuracy of a floating error result list to a wiring driven by a three state buffer. SOLUTION: In steps 6 and 8, a time when a logical sum signal of all enable input changes from a logical value 1 to a logical value 0 or X is stored as a floating starting time. In steps 7, 9, 10, and 11, when the logical sum signal of all the enable input changes to the logical value 1, a floating period is calculated from the floating starting time. When it is greater than a previously set check value, a floating error of the wiring is registered.
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