公开(公告)号：US06414885B1

公开(公告)日：2002-07-02

申请号：US09739402

申请日：2000-12-19

申请人： Toshiyuki Nagamatsu ,  Hiroshi Yamauchi

发明人： Toshiyuki Nagamatsu ,  Hiroshi Yamauchi

IPC分类号： G11C700

摘要： A memory space controller controls a part of normal regions of memory space as a redundancy region for relieving faulty regions. The memory space controller relocates the faulty regions to the part of the normal regions at a final address side of a memory space, thereby forming a continuous memory space. The memory space controller includes at least a faulty address storing table unit, a replace address storing table unit, a first address agreement/disagreement detecting circuit, and an address data selecting circuit.