Patent ID: 7802141
Filing Date: 2010-09-21
Classification: G01R,G06F

Abstract:
1. A semiconductor device comprising: a one-chip microcomputer including therein a booster circuit for boosting an externally supplied power supply voltage, the booster circuit being incorporated in a same chip of the microcomputer, wherein the microcomputer is configured so that an over-voltage application testing can be performed thereon by using a boosted voltage of the booster circuit, and the microcomputer includes: a plurality of voltage input terminals for receiving different power supply voltages; a plurality of circuit sections that operate with the power supply voltages via the plurality of voltage input terminals, respectively; and voltage switching means for switching so that the boosted voltage of the booster circuit is supplied to one of the plurality of circuit sections that normally operates with a highest one of the power supply voltages in an ordinary state and that each of the other circuit sections is supplied with a one-step higher voltage than a voltage that it is normally supplied in the ordinary state.