| 摘要 |
PURPOSE: An option circuit is provided, which dose a test by selecting an input/output structure through one fuse repair process, without using an external pad and a metal mask option. CONSTITUTION: A test mode circuit(10) outputs a test mode signal. A repair mirror circuit(20) includes a resistor and a fuse connected between a power supply voltage source and a ground voltage source serially, and outputs a repair signal by repairing the fuse according to the state of the test mode signal. And an input/output structure determination circuit(30) selects one of the input/output structures by performing an exclusive OR operation of the test mode signal and the repair signal.
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