| 摘要 |
PURPOSE: To provide a flash memory which can discriminate a normal/defective condition of each sector without outputting a normal product code to the outside from a flash memory in which a normal product code is written in a normal product sector. CONSTITUTION: Transistors QL0-QL7 and QR0-QR7 are provided at both sides of sense latches SL0-SL7. When a normal product code 10101100 is latched by the sense latches SL7-SL0, a current sense amplifier 124 detects non- conduction of common drain lines 120, 121, thereby, it is discriminated whether a normal product code is written in each sector or not.
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