Flash memory PC card capable of refreshing data a predetermined

Static information storage and retrieval – Floating gate – Particular biasing

Patent

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Details

36518533, 365236, 365228, 39518204, 395430, 235492, G11C 1606

Patent

active

057242852

ABSTRACT:
In order to hold data correctly for a longer time in a flash PC card comprising a flash memory device, a timer starts counting a predetermined time when the PC card is removed from a host. When the PC card is inserted into the host again, a controller refreshes data stored in the flash memory device if the timer has counted the predetermined time. In a different PC card, a flash PC card comprises an internal power supply. A timer starts counting a predetermined time after an external power supply is stopped. When the timer has counted a predetermined time, the power supply starts to supply an electric power. A controller refreshes data stored in the flash memory device when the internal power supply starts to supply an electric power.

REFERENCES:
patent: 5511020 (1996-04-01), Hu et al.
patent: 5515333 (1996-05-01), Fujita et al.
patent: 5619452 (1997-04-01), Miyauchi
patent: 5627783 (1997-05-01), Miyauchi

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