Fujitsu Corporation

Fujitsu Vlsi Limited

Hirosuke Komyoji

Yoshihiro Takemae

Tetsuhiko Endoh

Ryuji Tanaka

Masaru Masuyama

Katsuhiko Itakura

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.

Growing community of inventors

Minokamo, Japan

Hirosuke Komyoji