NONVOLATILE MEMORY DEVICE AND SYSTEM INCLUDING PHASE-CHANGE OTP MEMORY CELL, AND RELATED METHOD

摘要

PROBLEM TO BE SOLVED: To provide a nonvolatile memory capable of safely protecting security information and also changing it as necessary.

SOLUTION: This nonvolatile memory includes: a phase-change memory cell array which includes a plurality of normal phase-change memory cells and a plurality of pseudo one time programmable (OTP) phase-change memory cells; a write driver which writes data into the normal and pseudo OTP phase-change memory cells of the phase-change memory cell array; and an OTP controller which selectively disables the write driver.

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