Semiconductor device

A semiconductor device including an integrated circuit operated according to a two- or more-phase clock, comprising:

• an error detecting unit that detects that a problem of the operation occurs in the integrated circuit;
• a clock state holding unit that holds the information of phases in a predetermined term of the two- or more-phase clock;
• an output unit that outputs the information of the phases in the predetermined term of the two- or more-phase clock when the error detecting unit detects that the problem of the operation occurs in the integrated circuit;
• and
• a clock reproducing unit for reproducing a state in which a problem occurs from an operating state before the error detecting unit detects the problem with a two- or more-phase reproduced clock having the same physical relationship in which the problem is detected as that in normal operation.