Memory card

Details Memory card Memory card

1989-09-25

1991-06-18

Clawson, Jr., Joseph E.

Static information storage and retrieval

Hardware for storage elements

365 64, 3652385, 36523006, 235492, G11C 506

Patent

active

050254154

ABSTRACT:
A memory card is used on a card write and/or read apparatus which has a data bus with an arbitrary bit width and writes and/or reads a datum to and/or from the memory card. The memory card comprises a data input/output terminal, a memory part having a data bus with a bit width of at least n bits for coupling to the data bus of the card write and/or read apparatus via the data input/output terminal, an address input terminal for receiving an address signal, a first input terminal for receiving a first chip select signal which selects a first byte, a second input terminal for receiving a second chip select signal which selects a second byte, and a decoder circuit for determining a bit width of the data bus of the memory part to be used for data communication between the card write and/or read apparatus to one of n bits and n/N bits based on the first and second chip select signals and one or a plurality of arbitrary bits of the address signal by supplying control signals to the memory part, where n, N and n/N are positive integers.

REFERENCES:
patent: 4099253 (1978-07-01), Dooley
patent: 4213177 (1980-07-01), Schmidt
patent: 4214302 (1980-07-01), Schmidt
patent: 4375665 (1983-03-01), Schmidt
patent: 4400794 (1983-08-01), Koos
patent: 4791607 (1988-12-01), Igarashi et al.

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