| 摘要 |
A semiconductor memory unit with a repair circuit includes a controller, a 2-to-1 selector, an address decoder and an address comparator. The controller supplies the 2-to-1 selector and the address comparator with a setup signal to carry out the following control. When the 2-to-1 selector is controlled to supply the address decoder with a repair address signal, the address comparator is controlled to have a repair signal information holding section, which is installed in the address comparator, hold the repair address decoded by the address decoder. When the 2-to-1 selector is controlled to supply the address decoder with a read/write address signal, the address comparator is controlled to compare the read/write address with the repair address. The semiconductor memory unit can obviate the need for a repair address decoder, thereby reducing the unit area.
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