Memory card circuit with separate buffer chips

Details Memory card circuit with separate buffer chips Memory card circuit with separate buffer chips

1995-02-22

1997-04-29

Clawson, Jr., Joseph E.

Static information storage and retrieval

Read/write circuit

Having particular data buffer or latch

365 52, 365 63, 365 72, 365229, 36523008, 235441, 235442, G11C 700

Patent

active

056255934

ABSTRACT:
A conventional memory card circuit has a construction where an input terminal and an output terminal of storage means are directly connected with a terminal unit. In consequence, the conventional memory card circuit has a disadvantage that the stored content of the storage means might be damaged when a signal applied from the terminal unit is unstable at the time of inserting or detaching a memory card into or from the terminal unit. Therefore, according to the present invention, a buffer is provided in each of input and output terminals of storage means and the storage means is cut off from outside by the buffer at the time of inserting or detaching a memory card into or from a terminal unit, whereby the stored content of the storage means can be prevented from being damaged.

REFERENCES:
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patent: 4288865 (1981-09-01), Graham
patent: 4591742 (1986-05-01), Morito
patent: 4766572 (1988-08-01), Kobayashi
patent: 4800533 (1989-01-01), Arakawa
patent: 4912346 (1990-03-01), Mizuta
patent: 4962485 (1990-10-01), Kato et al.
patent: 4985870 (1991-01-01), Faraci
patent: 4990760 (1991-02-01), Tomari et al.
patent: 5016223 (1991-05-01), Kimura et al.
patent: 5058074 (1991-10-01), Sakamoto
Nikkei Electronics 1985, 12. 16, pp. 249-262.

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