Flash memory management method including shifting or copying dat

Details Flash memory management method including shifting or copying dat Flash memory management method including shifting or copying dat

1995-09-29

1999-08-03

Gossage, Glenn

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711171, 711165, 36518529, 36518533, 707206, G06F 1202, G06F 1300, G11C 1600

Patent

active

059338458

ABSTRACT:
A method of operating a flash memory which can be recorded in "byte" o in "word" form, but can only be erased in blocks, is disclosed. A memory optimization algorithm is used where the degree of filling of the individual blocks in the flash memory is determined and compared to a threshold. According to the degree of filling, data are shifted to the end of the memory, or it is determined whether an entire block can be erased, or whether copying can take place into open areas of blocks within the memory so that an entire block can be erased, or whether files can be temporarily stored in areas marked for erasure and reconstructed after the block has been erased, or if files can be overwritten to areas marked for erasure by means of a linkage. In the event that optimization is not possible, a user inquiry may be made.

REFERENCES:
patent: 5305276 (1994-04-01), Uenoyama
patent: 5341339 (1994-08-01), Wells
patent: 5442768 (1995-08-01), Sudoh et al.
patent: 5473569 (1995-12-01), Chwu
patent: 5535356 (1996-07-01), Kim et al.
patent: 5544356 (1996-08-01), Robinson et al.

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