| 摘要 |
PROBLEM TO BE SOLVED: To provide an anti-fuse circuit capable of disabling a fuse set concerned even if writing to a defective address fails. SOLUTION: The anti-fuse circuit has a plurality of fuse sets 100 including an anti-fuse element 330 for holding data in a nonvolatile manner. The fuse sets include: a plurality of bit storage circuits 210 for storing a defective address; and a disable circuit 230 for disabling the defective address stored in the plurality of bit storage circuits. Since each fuse set 100 has the disable circuit 230, the fuse set to which a defective address has been written once can be disabled after that. Therefore, even if writing a defective address fails, it is not necessary to abolish an entire chip. COPYRIGHT: (C)2009,JPO&INPIT |
