Semiconductor memory device and method of controlling the same

A semiconductor memory device comprising:

• a memory cell configured to store a first value or a second value as stored data;
• and
• a control circuit configured to read out the first value or the second value as the stored data from the memory cell,
• wherein
• the memory cell comprises:
• a first operation area where a cell current flowing across the memory cell increases as a voltage across the memory cell increases,
• a second operation area where the cell current in the second operation area is larger than the cell current in the first operation area and the voltage across the memory cell decreases while the cell current increases, and
• a third operation area where the cell current in the third operation area is larger than the cell current in the second operation area and the cell current increases as the voltage across the memory cell increases,
• the control circuit performs:
• first reading processing of reading out the stored data from the memory cell such that the cell current of a case where the stored data has the first value and the cell current of a case where the stored data has the second value respectively take values in the first operation area, and
• second reading processing of reading out the stored data from the memory cell such that at least one of the cell current in the case where the stored data has the first value and the cell current in the case where the stored data has the second value takes a value in the second operation area or the third operation area.