| 摘要 |
PURPOSE: An apparatus for generating a high voltage in a semiconductor device is provided to prevent a malfunction of a high voltage generation circuit by intercepting a current path of an external supply voltage generation circuit to the high voltage generation circuit. CONSTITUTION: A voltage pumping portion(30) pumps a voltage according to a pumping clock signals(pump-clk1 to pump-clk4) applied from an oscillator and a high voltage pumping enable signal(ppe) applied from a detection portion. The voltage pumping portion(30) includes a control portion(40). The control portion(40) is driven according to the high voltage pumping enable signal(ppe) applied from the detection portion. The control portion(40) is connected between the third node(node3) and an external supply voltage terminal(Vext) in order to control an NMOS transistor(N1) according to the high voltage pumping enable signal(ppe) applied from the detection portion. The control portion is formed with an NMOS transistor(N7).
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