Power supply voltage detection circuit

摘要

A power supply voltage detection circuit is provided including: a first switch to connect between a power supply voltage terminal and a first terminal according to a power supply voltage detection signal and an external signal; a second switch to connect between a reference potential terminal and a second terminal according to the power supply voltage detection signal and the external signal; a first resistance connected between the second terminal and the power supply voltage terminal; and a third switch connecting between the first terminal and the reference potential terminal according to a voltage of the second terminal; and an output circuit outputting the power supply voltage detection signal based on a signal from the first terminal.