Portable type semiconductor storage apparatus

Details Portable type semiconductor storage apparatus Portable type semiconductor storage apparatus

1993-12-29

1995-03-21

Hajec, Donald

Registers

Records

Conductive

235441, 235436, 365229, G06K 1906

Patent

active

053998480

ABSTRACT:
A portable semiconductor data storage apparatus includes a memory for storing data, a plurality of input/output signal lines connected to the memory, the input/output signal lines being connected to a terminal machine when the data storage apparatus is inserted into the terminal machine, a removal detection circuit for generating a removal signal before disconnection of the input/output signal lines from the terminal machine when the data storage apparatus is removed from the terminal machine, and an access inhibition circuit for maintaining access to the memory until a read or write cycle during which the removal signal is generated by the removal detection means ends and for inhibiting access to the memory beginning from the next read or write cycle after the removal signal was generated.

REFERENCES:
patent: 4587640 (1986-05-01), Saitoh
patent: 4669066 (1987-05-01), Kagawa et al.
patent: 4777626 (1988-10-01), Matsushita et al.
patent: 4782468 (1988-11-01), Jones et al.
patent: 4849944 (1989-07-01), Matsushita
patent: 5016223 (1991-05-01), Kimura et al.
patent: 5175840 (1992-12-01), Sawase et al.

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