Memory circuit capable of executing a bit manipulation at a high

Details Memory circuit capable of executing a bit manipulation at a high Memory circuit capable of executing a bit manipulation at a high

1993-03-04

1995-01-17

LaRoche, Eugene R.

Static information storage and retrieval

Read/write circuit

395100, 395115, 395400, 395425, G06F 314

Patent

active

053831543

ABSTRACT:
A memory circuit includes a RAM having a memory cell section and a bit manipulation section for controlling a writing of a bit unit to the memory cell section. The RAM is configured to be able to be read and written at different timings by at least two devices. A register stores mask bits for controlling an operation of the bit manipulation section for each bit of data written to the memory cell section. In the bit manipulation operation, a content of a memory cell within the memory cell corresponding to an inactive bit in the register is rewritten by the bit manipulation section, but a content of a memory cell within the memory cell corresponding to the active bit in the register is maintained as it is.

REFERENCES:
patent: 4710767 (1987-12-01), Sciacero et al.
patent: 4779223 (1988-10-01), Asai et al.
patent: 4851834 (1989-07-01), Stockebrand et al.

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