Patent ID: 7030681
Filing Date: 2006-04-18
Classification: G11C

Abstract:
1. A semiconductor device comprising: first internal voltage generation circuitry for generating a voltage internal with respect to said semiconductor device in accordance with a first power supply voltage external with respect to said semiconductor device, second internal voltage generation circuitry for generating said internal voltage in accordance with a second power supply voltage external with respect to said semiconductor device, said first and second power supply voltages being supplied to said semiconductor device independently and individually upon operation of said semiconductor device. through different paths, and said internal voltage being different in a voltage level from said first and second power supply voltages, a power on detection circuit for detecting power on of said first power supply voltage, and generating a power on detection signal in accordance with a detection result; and a voltage holding circuit receiving said second power supply voltage as one operating power supply voltage, for setting said internal voltage at a level of said second power supply voltage in response to the power on detection signal from said power on detection circuit.