REDUNDANCY CONTROL CIRCUIT IN SEMICONDUCTOR MEMORY APPARATUS

摘要

PURPOSE: A redundancy control circuit in a semiconductor memory apparatus is provided to process a stable redundancy operation by compartmentalizing two memory banks and supporting the redundancy operation. CONSTITUTION: A first enable unit(2111) operates in response to a power up signal. A first enable unit generates a first fuse enable signal according to the cutting of a fuse inside. A second enable unit(2113) operates in response to a power up signal. A second enable unit generates a second fuse enable signal according to the cutting of the fuse inside. A redundancy address generating unit(2115) generates the redundancy address according to each cutting of the fuse when the first or second fuse enable signal is enabled. A first block redundancy control unit(2117) generates the first block redundancy enable signal in response to the first fuse enable signal. A second block redundancy control unit(2119) generates the second block redundancy enable signal in response to the second fuse enable signal.