Spansion Llc.

Satoru Sugimoto

Takaaki Furuyama

Mitsuhiro Nagao

Kenta Kato

In inputting control information for setting access conditions in a system having a common data bus (), when a predetermined bit string making up an access condition setting command is inputted to predetermined terminals which are not data input/output terminals (S), the predetermined terminals are set as control information input terminals (S) and inputted control information is temporarily maintained in a non-volatile memory device (S). When inputting of control information is completed (S), the control information that has been temporarily maintained is stored in a non-volatile memory region all at once (S). During an access condition setting operation, the data input/output terminals are released (S) and the data bus () is made available to other banks or devices () so that data transfer efficiency of the system can be improved.

Method and apparatus for setting input terminals for receiving control information in a semiconductor memory device

An address identifying memory block is match-compared with address information stored in a to-be-remedied block memory section in a block redundancy judge section. A redundant block select signal is outputted from the block redundancy judge section by judgment of address match. A memory block column select section selects a memory block column having a redundant memory block irrespective of an address signal as the redundant block select signal is activated if block redundancy is activated to output a memory block column select signal. A column redundancy memory section selects address information of column redundancy relating a redundant memory block arranged in a memory block column in accordance with the memory block column select signal.

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Kasugai, Japan

Satoru Sugimoto