Static information storage and retrieval – Read/write circuit – Bad bit
Patent
1996-09-13
1998-06-09
Dinh, Son T.
Static information storage and retrieval
Read/write circuit
Bad bit
36523003, G11C 700
Patent
active
057645752
ABSTRACT:
A semiconductor read-only memory includes a plurality of memory cell groups each having a plurality of memory cells, a first selector for selecting an arbitrary memory cell group from the plurality of memory cell groups, and a second selector for selecting an arbitrary memory cell from the selected memory cell group. The semiconductor read-only memory further includes: an address storage circuit for storing address information of a predetermined memory cell portion in a memory cell group; a data storage circuit for storing memory cell information of the predetermined memory cell portion; and a switching circuit for switching between information stored in the memory cell selected from the memory cell group and the memory cell information stored in the data storage circuit, based on the address information, and outputting either the information stored in the memory cell selected from the memory cell group or the memory cell information stored in the data storage circuit.
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patent: 5075890 (1991-12-01), Itoh et al.
patent: 5132933 (1992-07-01), Schreck et al.
patent: 5272672 (1993-12-01), Ogihara
patent: 5278794 (1994-01-01), Tanaka et al.
patent: 5452258 (1995-09-01), Hotta
patent: 5485424 (1996-01-01), Iwai et al.
Inoue Kouji
Kawai Tomoyuki
Dinh Son T.
Sharp Kabushiki Kaisha
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