Method for altering a word stored in a write-once memory device

Details Method for altering a word stored in a write-once memory device Method for altering a word stored in a write-once memory device

2005-05-31

2005-05-31

Chung, Phung My (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S752000, C714S785000

Reexamination Certificate

active

06901549

ABSTRACT:
The preferred embodiments described herein provide a method for altering a word stored in a write-once memory device. In one preferred embodiment, a write-once memory device is provided storing a word comprising a plurality of data bits and a plurality of syndrome bits. The word is altered by identifying X bit(s) in the word that are in an un-programmed state and switching the X bit(s) from the un-programmed state to a programmed state, where X is sufficient to introduce an uncorrectable error in the word. Other preferred embodiments are provided, and each of the preferred embodiments can be used alone or in combination with one another.

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