| 摘要 |
PROBLEM TO BE SOLVED: To stabilize a write characteristic by adjusting a pulse waveform of a write current. SOLUTION: Setting data deciding supply/cut-off timing, amplitude, and its temporal variation (current waveform) of a write-word/bit-line-current is registered in a setting circuit 23. A write-current waveform control circuit 24 generates a write word line drive signal WWLDRV, write word line synch- signal WWLSNK, write bit line drive signal WBLDRV, and a write bit line synch-signal WBLSNK based on this setting data. A current waveform of the write word/bit line current is controlled for each chip or each memory cell array. COPYRIGHT: (C)2004,JPO
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