| 摘要 |
PURPOSE: A power up signal generating circuit of a semiconductor device is provided to prevent power up signal generation errors by stabilizing an initial operation of the semiconductor device. CONSTITUTION: A driver(110) generates a preliminary power up signal in response to a first voltage. A signal combining unit(130) generates a power up signal by combining a preliminary power up signal and a test mode signal. A power control unit(120) supplies a first voltage or a second voltage to the driver in response to the power up signal. A level shifter(140) shifts the preliminary power up signal from an internal voltage level to an external voltage level. [Reference numerals] (140) Level shifter
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