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SEMICONDUCTOR MEMORY DEVICE WITH READ PROTECTION FUNCTION HAVING READ PROTECTION UNITS INCLUDING REGISTER AND POWER ON DETECTION CIRCUIT
SEMICONDUCTOR MEMORY DEVICE WITH READ PROTECTION FUNCTION HAVING READ PROTECTION UNITS INCLUDING REGISTER AND POWER ON DETECTION CIRCUIT
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机译:具有读取保护功能的半导体存储器,具有读取保护单元,包括寄存器和上电检测电路
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摘要
PURPOSE: A semiconductor memory device with read protection function is provided to prevent data stored in memory cells by having a read protection units. CONSTITUTION: A dynamic random access memory device(100) with read protection function comprises a DRAM core(300) having a well area for plural memory cells storing data, a back-bias voltage generator circuit for generating a back-bias voltage supplied to the well area; a read protection unit(200) for preventing data stored before power-off in the memory cells from being read during power-on. Wherein, the read protection unit supplies either power supply voltage or external power supply voltage in response to the reset command from the outside in order to have equal data value in each memory cell, and dis-activates the back-bias voltage generator circuit.
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