| 摘要 |
<p>Test circuits 150 to 154, which determine whether memory blocks 110 to 114 including at least one redundant block are defective, are included in the memory blocks, respectively, A decoding rule generating circuit 13 so generates a decoding rule that a defective block can not be accessed, and outputs the generated decoding rule as a decoding-rule signal RUL. Under the decoding rule, the redundant address decoder 14 decodes the address signal ADDR, to permit access to the memory blocks except the defective block(s). <IMAGE></p> |
