Computer monitoring device

摘要

The present invention can provide a computer monitoring device which can ensure safe operation, even when a power supply voltage supplied to a microcomputer decreases and the microcomputer thereby enters in an abnormal state. When the power supply voltage supplied from a microcomputer power supply decreases, the power supply circuit is switched to an auxiliary power supply in order to supply power to a microcomputer monitoring circuit and signal processing circuit. The auxiliary power supply supplies power to the microcomputer monitoring circuit and the signal processing circuit via a diode. For this reason, since the microcomputer monitoring circuit and the signal processing circuit can continue to operate, processing for ensuring safe operation can be performed.