Semiconductor device with change-over circuit to access a memory

Details Semiconductor device with change-over circuit to access a memory Semiconductor device with change-over circuit to access a memory

1988-07-15

1991-01-29

Bowler, Alyssa H.

Static information storage and retrieval

Addressing

Multiplexing

36523006, 36518901, 36523008, 36523003, G11C 800, G11C 11408, G11C 1606

Patent

active

049891855

ABSTRACT:
A memory area within a semiconductor integrated circuit device is accessible through an address changeover circuit. External control signals instruct the memory device as to the addressing mode desired. Address signals originating externally are provided directly to the IC's address decoder circuits, while addresses originating internal to the IC are first shifted one or two bits to modify the address by a power of 2, then provided to the address decoder circuits. In this way, data of bit length N may be written to a memory array of bit length M, where M>N.

REFERENCES:
patent: 4520464 (1985-05-01), Hallaver
patent: 4617653 (1986-10-01), Matsuzaki et al.
patent: 4833656 (1989-05-01), Tobita
"Hitachi Microcomputer Data Book, 8-bit Single Chip", issued by Hitachi, Ltd., Aug. 1984, pp. 823-861.

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