| 摘要 |
Provided is a variable resistance nonvolatile memory device that achieves, in multi-bit simultaneous writing for increasing a writing speed, writing with little variation caused by positions of memory cells in multi-bit simultaneous writing. The variable resistance nonvolatile memory device includes bit lines, word lines, memory cells, a first write circuit (e.g., a write circuit (60-0)), a second write circuit (e.g., a write circuit (60-k−1)), a first selection circuit (e.g., a selection circuit (S0—0)), a second selection circuit (e.g., a selection circuit (S0—k−1)), and a first word line drive circuit (a word line drive circuit (40-1)), wherein the first selection circuit (e.g., an NMOS transistor (TS0—0—0 to TS0—0—m−1) included in the selection circuit) has a greater ON resistance than the second selection circuit (e.g., an NMOS transistor (TS0—k−1—0 to TS0—k−1—m−1) included in the selection circuit) does. |
