Patent ID: 6954103

Claim:
A semiconductor device comprising: reference voltage generating circuitry for generating a reference voltage; comparing circuitry for comparing said reference voltage with an internal voltage and outputting a signal according to a result of comparison when activated; drive circuitry for supplying current from a power supply node to an internal voltage line and generating said internal voltage in accordance with said output signal of said comparing circuitry; comparison control circuitry for stopping a comparing operation of said comparing circuitry, fixing said output signal of the comparing circuitry at a predetermined voltage level, and setting said drive circuitry in a normally conductive state in accordance with an external voltage level setting signal; and an auxiliary transistor for coupling said internal voltage line to said power supply node in accordance with said external voltage level setting signal, wherein said comparing circuitry includes: a comparator for comparing said internal voltage with said reference voltage and generating said signal according to a result of comparison when activated; and a current source transistor for selectively conducting an operation current to said comparator in accordance with said external voltage level setting signal and an operation mode instruction signal.