Method of supervising storage of data in a memory card having EE

Details Method of supervising storage of data in a memory card having EE Method of supervising storage of data in a memory card having EE

Filed on

1997-02-28

Date issued

1998-10-27

Examiner

Robertson, David L.

Patent Class

Electrical computers and digital processing systems: memory

SubClass

Storage accessing and control

SubSubClass

Specific memory composition

Other Related Categories

G06F 1300

Type

Patent

Status

active

Patent number

058290141

Description

ABSTRACT:
A method of supervising the storage of picture data, character data or similar data in a memory card having an EEPROM (Electrically Erasable Programmable Read Only Memory) and a memory card system using the same. When the EEPROM in an initialized state, a controller formats it into a data area made up of a plurality of data subareas and a directory area made up of a plurality of supervisory subareas each being associated with respective one of the data subareas. In the event of writing data in any one of the data subareas, the controller writes a serial number or similar occupancy code at the leading field of one supervisory subarea corresponding to the data subarea of interest. The leading field of each supervisory subarea remains in the initialized state until the occupancy code has been written thereto.

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