Patent ID: 9350333
Filing Date: 2016-05-24
CPC Classification: G01R,G06F,H03K

Claim Text:
1. A semiconductor device comprising: a first central processing unit (CPU); a first circuit that includes a first logic circuit and a first malfunction pre-detecting circuit; a power supply circuit; and a first switch that is disposed between the power supply circuit and the first circuit, wherein the first malfunction pre-detecting circuit includes a first selector that selects one of an output of the first logic circuit and a first test data, a first delay circuit that receives an output of the first selector, a second selector that selects one of the output of the first logic circuit and a second test data, and a first comparator that compares an output of the first delay circuit with an output of the second selector, and wherein when the first malfunction pre-detecting circuit detects a malfunction state based on a result of the first comparator, the first CPU turns off the first switch.