Patent ID: 6836104
Filing Date: 2004-12-28
Classification: G05F

Abstract:
An internal power supply voltage control apparatus comprising:a reference voltage generating circuit for generating a reference voltage; a first internal power supply reference voltage generating circuit, connected to said reference voltage generating circuit, for generating a first internal power supply reference voltage in accordance with said reference voltage; a second internal power supply reference voltage generating circuit for generating a second internal power supply reference voltage in accordance with a voltage applied to a predetermined pad; a test mode selecting circuit, connected to said first and second internal power supply reference voltage generating circuits, for activating one of said first and second internal power supply reference voltage generating circuits in accordance with a control signal; and an internal power supply voltage generating circuit, connected to said first and second internal power supply reference voltage generating circuits, for generating an internal power supply voltage in accordance with one of said first and second internal power supply reference voltages generated from an activated one of said first and second internal power supply reference voltage generating circuits.