Power up reset circuit and semiconductor device comprising the same

A power up reset circuit and a semiconductor device comprising the same are provided to adjust a reset voltage simply by applying a proper signal to a resistance control unit through a pad during test. A sensing part(11) outputs a node voltage in response to an external power supply voltage. An output part(21) outputs a voltage sensing signal in response to the node voltage. A signal generation part(30) outputs a reset signal in response to the voltage sensing signal. A first resistance control unit(15) adjusts the level of the node voltage in response to a first control signal inputted from the outside. A second resistance control unit(25) adjusts the level of the voltage sensing signal in response to a second control signal inputted from the outside.