IC card having flash erase means

Details IC card having flash erase means IC card having flash erase means

1992-04-10

1994-08-30

Cross, E. Rollins

Registers

Records

Conductive

365218, 365900, G06K 1906

Patent

active

053430301

ABSTRACT:
A command input IC card includes a plurality of memory semiconductor elements for electrically storing and batch-erasing data and an address decoder for decoding a card signal in response to an address signal to selectively output a chip enable signal to one of the memory semiconductor elements. The operating mode of each element is determined in response to a command input from outside the IC card. The IC card also includes a command detector and a latch circuit, both of which inhibit an address decoder from decoding in response to a predetermined command. The card enable signal is thereby supplied as the chip enable signal to all the memory semiconductor elements.

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patent: 5200600 (1993-04-01), Shinagawa
patent: 5214605 (1993-05-01), Lim et al.
patent: 5260555 (1993-11-01), Sakamoto

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